author | jwilhelm |
Thu, 03 Oct 2013 21:36:29 +0200 | |
changeset 20398 | b206c580c45f |
parent 20311 | 7db0b4ad8981 |
child 20403 | 45a89fbcd8f7 |
child 20318 | a02849111b27 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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#include "precompiled.hpp" |
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#include "code/codeCache.hpp" |
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#include "code/icBuffer.hpp" |
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#include "gc_implementation/g1/bufferingOopClosure.hpp" |
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#include "gc_implementation/g1/concurrentG1Refine.hpp" |
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#include "gc_implementation/g1/concurrentG1RefineThread.hpp" |
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#include "gc_implementation/g1/concurrentMarkThread.inline.hpp" |
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#include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
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#include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
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#include "gc_implementation/g1/g1CollectorPolicy.hpp" |
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#include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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#include "gc_implementation/g1/g1EvacFailure.hpp" |
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#include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
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#include "gc_implementation/g1/g1Log.hpp" |
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#include "gc_implementation/g1/g1MarkSweep.hpp" |
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#include "gc_implementation/g1/g1OopClosures.inline.hpp" |
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#include "gc_implementation/g1/g1RemSet.inline.hpp" |
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#include "gc_implementation/g1/g1YCTypes.hpp" |
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#include "gc_implementation/g1/heapRegion.inline.hpp" |
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#include "gc_implementation/g1/heapRegionRemSet.hpp" |
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#include "gc_implementation/g1/heapRegionSeq.inline.hpp" |
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#include "gc_implementation/g1/vm_operations_g1.hpp" |
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#include "gc_implementation/shared/gcHeapSummary.hpp" |
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#include "gc_implementation/shared/gcTimer.hpp" |
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#include "gc_implementation/shared/gcTrace.hpp" |
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#include "gc_implementation/shared/gcTraceTime.hpp" |
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#include "gc_implementation/shared/isGCActiveMark.hpp" |
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#include "memory/gcLocker.inline.hpp" |
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#include "memory/genOopClosures.inline.hpp" |
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#include "memory/generationSpec.hpp" |
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#include "memory/referenceProcessor.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "oops/oop.pcgc.inline.hpp" |
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#include "runtime/vmThread.hpp" |
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size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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// turn it on so that the contents of the young list (scan-only / |
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// to-be-collected) are printed at "strategic" points before / during |
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// / after the collection --- this is useful for debugging |
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#define YOUNG_LIST_VERBOSE 0 |
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// CURRENT STATUS |
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// This file is under construction. Search for "FIXME". |
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// INVARIANTS/NOTES |
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// |
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// All allocation activity covered by the G1CollectedHeap interface is |
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// serialized by acquiring the HeapLock. This happens in mem_allocate |
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// and allocate_new_tlab, which are the "entry" points to the |
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// allocation code from the rest of the JVM. (Note that this does not |
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// apply to TLAB allocation, which is not part of this interface: it |
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// is done by clients of this interface.) |
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// Notes on implementation of parallelism in different tasks. |
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// |
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// G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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// The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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// It does use run_task() which sets _n_workers in the task. |
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// G1ParTask executes g1_process_strong_roots() -> |
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// SharedHeap::process_strong_roots() which calls eventually to |
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// CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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// SequentialSubTasksDone. SharedHeap::process_strong_roots() also |
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// directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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// |
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// Local to this file. |
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class RefineCardTableEntryClosure: public CardTableEntryClosure { |
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SuspendibleThreadSet* _sts; |
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G1RemSet* _g1rs; |
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ConcurrentG1Refine* _cg1r; |
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bool _concurrent; |
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public: |
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RefineCardTableEntryClosure(SuspendibleThreadSet* sts, |
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G1RemSet* g1rs, |
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ConcurrentG1Refine* cg1r) : |
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_sts(sts), _g1rs(g1rs), _cg1r(cg1r), _concurrent(true) |
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{} |
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bool do_card_ptr(jbyte* card_ptr, int worker_i) { |
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bool oops_into_cset = _g1rs->refine_card(card_ptr, worker_i, false); |
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// This path is executed by the concurrent refine or mutator threads, |
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// concurrently, and so we do not care if card_ptr contains references |
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// that point into the collection set. |
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assert(!oops_into_cset, "should be"); |
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if (_concurrent && _sts->should_yield()) { |
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// Caller will actually yield. |
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return false; |
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} |
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// Otherwise, we finished successfully; return true. |
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return true; |
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} |
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void set_concurrent(bool b) { _concurrent = b; } |
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}; |
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class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { |
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int _calls; |
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G1CollectedHeap* _g1h; |
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CardTableModRefBS* _ctbs; |
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int _histo[256]; |
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public: |
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ClearLoggedCardTableEntryClosure() : |
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_calls(0), _g1h(G1CollectedHeap::heap()), _ctbs(_g1h->g1_barrier_set()) |
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{ |
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for (int i = 0; i < 256; i++) _histo[i] = 0; |
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} |
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bool do_card_ptr(jbyte* card_ptr, int worker_i) { |
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if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { |
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_calls++; |
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unsigned char* ujb = (unsigned char*)card_ptr; |
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int ind = (int)(*ujb); |
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_histo[ind]++; |
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*card_ptr = -1; |
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} |
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return true; |
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} |
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int calls() { return _calls; } |
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void print_histo() { |
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gclog_or_tty->print_cr("Card table value histogram:"); |
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for (int i = 0; i < 256; i++) { |
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if (_histo[i] != 0) { |
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gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); |
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} |
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} |
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} |
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}; |
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class RedirtyLoggedCardTableEntryClosure: public CardTableEntryClosure { |
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int _calls; |
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G1CollectedHeap* _g1h; |
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CardTableModRefBS* _ctbs; |
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public: |
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RedirtyLoggedCardTableEntryClosure() : |
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_calls(0), _g1h(G1CollectedHeap::heap()), _ctbs(_g1h->g1_barrier_set()) {} |
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bool do_card_ptr(jbyte* card_ptr, int worker_i) { |
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if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { |
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_calls++; |
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*card_ptr = 0; |
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} |
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return true; |
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} |
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int calls() { return _calls; } |
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}; |
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class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure { |
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public: |
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bool do_card_ptr(jbyte* card_ptr, int worker_i) { |
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*card_ptr = CardTableModRefBS::dirty_card_val(); |
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return true; |
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} |
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}; |
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YoungList::YoungList(G1CollectedHeap* g1h) : |
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_g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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_survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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guarantee(check_list_empty(false), "just making sure..."); |
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} |
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void YoungList::push_region(HeapRegion *hr) { |
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assert(!hr->is_young(), "should not already be young"); |
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assert(hr->get_next_young_region() == NULL, "cause it should!"); |
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hr->set_next_young_region(_head); |
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_head = hr; |
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_g1h->g1_policy()->set_region_eden(hr, (int) _length); |
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++_length; |
194 |
} |
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195 |
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196 |
void YoungList::add_survivor_region(HeapRegion* hr) { |
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2009 | 197 |
assert(hr->is_survivor(), "should be flagged as survivor region"); |
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assert(hr->get_next_young_region() == NULL, "cause it should!"); |
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hr->set_next_young_region(_survivor_head); |
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if (_survivor_head == NULL) { |
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2009 | 202 |
_survivor_tail = hr; |
1374 | 203 |
} |
204 |
_survivor_head = hr; |
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++_survivor_length; |
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206 |
} |
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207 |
||
208 |
void YoungList::empty_list(HeapRegion* list) { |
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209 |
while (list != NULL) { |
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210 |
HeapRegion* next = list->get_next_young_region(); |
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list->set_next_young_region(NULL); |
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list->uninstall_surv_rate_group(); |
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list->set_not_young(); |
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list = next; |
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} |
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216 |
} |
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217 |
||
218 |
void YoungList::empty_list() { |
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219 |
assert(check_list_well_formed(), "young list should be well formed"); |
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220 |
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221 |
empty_list(_head); |
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222 |
_head = NULL; |
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_length = 0; |
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224 |
||
225 |
empty_list(_survivor_head); |
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_survivor_head = NULL; |
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2009 | 227 |
_survivor_tail = NULL; |
1374 | 228 |
_survivor_length = 0; |
229 |
||
230 |
_last_sampled_rs_lengths = 0; |
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231 |
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232 |
assert(check_list_empty(false), "just making sure..."); |
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233 |
} |
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234 |
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235 |
bool YoungList::check_list_well_formed() { |
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bool ret = true; |
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uint length = 0; |
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HeapRegion* curr = _head; |
240 |
HeapRegion* last = NULL; |
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241 |
while (curr != NULL) { |
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if (!curr->is_young()) { |
1374 | 243 |
gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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"incorrectly tagged (y: %d, surv: %d)", |
1374 | 245 |
curr->bottom(), curr->end(), |
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curr->is_young(), curr->is_survivor()); |
1374 | 247 |
ret = false; |
248 |
} |
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249 |
++length; |
|
250 |
last = curr; |
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251 |
curr = curr->get_next_young_region(); |
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252 |
} |
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253 |
ret = ret && (length == _length); |
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254 |
||
255 |
if (!ret) { |
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256 |
gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); |
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gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
1374 | 258 |
length, _length); |
259 |
} |
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return ret; |
1374 | 262 |
} |
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bool YoungList::check_list_empty(bool check_sample) { |
1374 | 265 |
bool ret = true; |
266 |
||
267 |
if (_length != 0) { |
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gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
1374 | 269 |
_length); |
270 |
ret = false; |
|
271 |
} |
|
272 |
if (check_sample && _last_sampled_rs_lengths != 0) { |
|
273 |
gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); |
|
274 |
ret = false; |
|
275 |
} |
|
276 |
if (_head != NULL) { |
|
277 |
gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); |
|
278 |
ret = false; |
|
279 |
} |
|
280 |
if (!ret) { |
|
281 |
gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); |
|
282 |
} |
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283 |
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284 |
return ret; |
1374 | 285 |
} |
286 |
||
287 |
void |
|
288 |
YoungList::rs_length_sampling_init() { |
|
289 |
_sampled_rs_lengths = 0; |
|
290 |
_curr = _head; |
|
291 |
} |
|
292 |
||
293 |
bool |
|
294 |
YoungList::rs_length_sampling_more() { |
|
295 |
return _curr != NULL; |
|
296 |
} |
|
297 |
||
298 |
void |
|
299 |
YoungList::rs_length_sampling_next() { |
|
300 |
assert( _curr != NULL, "invariant" ); |
|
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301 |
size_t rs_length = _curr->rem_set()->occupied(); |
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302 |
|
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303 |
_sampled_rs_lengths += rs_length; |
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|
304 |
|
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|
305 |
// The current region may not yet have been added to the |
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306 |
// incremental collection set (it gets added when it is |
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|
307 |
// retired as the current allocation region). |
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|
308 |
if (_curr->in_collection_set()) { |
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|
309 |
// Update the collection set policy information for this region |
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310 |
_g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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|
311 |
} |
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|
312 |
|
1374 | 313 |
_curr = _curr->get_next_young_region(); |
314 |
if (_curr == NULL) { |
|
315 |
_last_sampled_rs_lengths = _sampled_rs_lengths; |
|
316 |
// gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); |
|
317 |
} |
|
318 |
} |
|
319 |
||
320 |
void |
|
321 |
YoungList::reset_auxilary_lists() { |
|
322 |
guarantee( is_empty(), "young list should be empty" ); |
|
323 |
assert(check_list_well_formed(), "young list should be well formed"); |
|
324 |
||
325 |
// Add survivor regions to SurvRateGroup. |
|
326 |
_g1h->g1_policy()->note_start_adding_survivor_regions(); |
|
2009 | 327 |
_g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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|
328 |
|
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|
329 |
int young_index_in_cset = 0; |
1374 | 330 |
for (HeapRegion* curr = _survivor_head; |
331 |
curr != NULL; |
|
332 |
curr = curr->get_next_young_region()) { |
|
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|
333 |
_g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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|
334 |
|
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|
335 |
// The region is a non-empty survivor so let's add it to |
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|
336 |
// the incremental collection set for the next evacuation |
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|
337 |
// pause. |
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|
338 |
_g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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|
339 |
young_index_in_cset += 1; |
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|
340 |
} |
12381
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|
341 |
assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
1374 | 342 |
_g1h->g1_policy()->note_stop_adding_survivor_regions(); |
343 |
||
5350
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|
344 |
_head = _survivor_head; |
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|
345 |
_length = _survivor_length; |
1374 | 346 |
if (_survivor_head != NULL) { |
5350
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changeset
|
347 |
assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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|
348 |
assert(_survivor_length > 0, "invariant"); |
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|
349 |
_survivor_tail->set_next_young_region(NULL); |
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changeset
|
350 |
} |
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changeset
|
351 |
|
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changeset
|
352 |
// Don't clear the survivor list handles until the start of |
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|
353 |
// the next evacuation pause - we need it in order to re-tag |
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|
354 |
// the survivor regions from this evacuation pause as 'young' |
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|
355 |
// at the start of the next. |
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|
356 |
|
2009 | 357 |
_g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
1374 | 358 |
|
359 |
assert(check_list_well_formed(), "young list should be well formed"); |
|
360 |
} |
|
361 |
||
362 |
void YoungList::print() { |
|
5350
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|
363 |
HeapRegion* lists[] = {_head, _survivor_head}; |
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|
364 |
const char* names[] = {"YOUNG", "SURVIVOR"}; |
1374 | 365 |
|
366 |
for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { |
|
367 |
gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); |
|
368 |
HeapRegion *curr = lists[list]; |
|
369 |
if (curr == NULL) |
|
370 |
gclog_or_tty->print_cr(" empty"); |
|
371 |
while (curr != NULL) { |
|
12508
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7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
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diff
changeset
|
372 |
gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
d76458352d62
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diff
changeset
|
373 |
HR_FORMAT_PARAMS(curr), |
1374 | 374 |
curr->prev_top_at_mark_start(), |
375 |
curr->next_top_at_mark_start(), |
|
12508
d76458352d62
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
12382
diff
changeset
|
376 |
curr->age_in_surv_rate_group_cond()); |
1374 | 377 |
curr = curr->get_next_young_region(); |
378 |
} |
|
379 |
} |
|
380 |
||
381 |
gclog_or_tty->print_cr(""); |
|
382 |
} |
|
383 |
||
2883
406d1e6d1aa1
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apetrusenko
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diff
changeset
|
384 |
void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
385 |
{ |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
386 |
// Claim the right to put the region on the dirty cards region list |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
387 |
// by installing a self pointer. |
406d1e6d1aa1
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apetrusenko
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2881
diff
changeset
|
388 |
HeapRegion* next = hr->get_next_dirty_cards_region(); |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
389 |
if (next == NULL) { |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
390 |
HeapRegion* res = (HeapRegion*) |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
391 |
Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
392 |
NULL); |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
393 |
if (res == NULL) { |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
394 |
HeapRegion* head; |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
395 |
do { |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
396 |
// Put the region to the dirty cards region list. |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
397 |
head = _dirty_cards_region_list; |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
398 |
next = (HeapRegion*) |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
399 |
Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
400 |
if (next == head) { |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
401 |
assert(hr->get_next_dirty_cards_region() == hr, |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
402 |
"hr->get_next_dirty_cards_region() != hr"); |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
403 |
if (next == NULL) { |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
404 |
// The last region in the list points to itself. |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
405 |
hr->set_next_dirty_cards_region(hr); |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
406 |
} else { |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
407 |
hr->set_next_dirty_cards_region(next); |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
408 |
} |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
409 |
} |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
410 |
} while (next != head); |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
411 |
} |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
412 |
} |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
413 |
} |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
414 |
|
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
415 |
HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
416 |
{ |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
417 |
HeapRegion* head; |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
418 |
HeapRegion* hr; |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
419 |
do { |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
420 |
head = _dirty_cards_region_list; |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
421 |
if (head == NULL) { |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
422 |
return NULL; |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
423 |
} |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
424 |
HeapRegion* new_head = head->get_next_dirty_cards_region(); |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
425 |
if (head == new_head) { |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
426 |
// The last region. |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
427 |
new_head = NULL; |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
428 |
} |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
429 |
hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
430 |
head); |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
431 |
} while (hr != head); |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
432 |
assert(hr != NULL, "invariant"); |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
433 |
hr->set_next_dirty_cards_region(NULL); |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
434 |
return hr; |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
435 |
} |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
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parents:
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diff
changeset
|
436 |
|
1374 | 437 |
void G1CollectedHeap::stop_conc_gc_threads() { |
2881 | 438 |
_cg1r->stop(); |
1374 | 439 |
_cmThread->stop(); |
440 |
} |
|
441 |
||
9935
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
442 |
#ifdef ASSERT |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
443 |
// A region is added to the collection set as it is retired |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
444 |
// so an address p can point to a region which will be in the |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
445 |
// collection set but has not yet been retired. This method |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
446 |
// therefore is only accurate during a GC pause after all |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
447 |
// regions have been retired. It is used for debugging |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
448 |
// to check if an nmethod has references to objects that can |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
449 |
// be move during a partial collection. Though it can be |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
450 |
// inaccurate, it is sufficient for G1 because the conservative |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
451 |
// implementation of is_scavengable() for G1 will indicate that |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
452 |
// all nmethods must be scanned during a partial collection. |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
453 |
bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
454 |
HeapRegion* hr = heap_region_containing(p); |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
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parents:
9623
diff
changeset
|
455 |
return hr != NULL && hr->in_collection_set(); |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
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diff
changeset
|
456 |
} |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
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parents:
9623
diff
changeset
|
457 |
#endif |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
458 |
|
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
459 |
// Returns true if the reference points to an object that |
18025 | 460 |
// can move in an incremental collection. |
9935
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
461 |
bool G1CollectedHeap::is_scavengable(const void* p) { |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
462 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
51267b5e1a3d
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parents:
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changeset
|
463 |
G1CollectorPolicy* g1p = g1h->g1_policy(); |
51267b5e1a3d
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parents:
9623
diff
changeset
|
464 |
HeapRegion* hr = heap_region_containing(p); |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
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diff
changeset
|
465 |
if (hr == NULL) { |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
466 |
// null |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
467 |
assert(p == NULL, err_msg("Not NULL " PTR_FORMAT ,p)); |
9935
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
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parents:
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diff
changeset
|
468 |
return false; |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
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parents:
9623
diff
changeset
|
469 |
} else { |
51267b5e1a3d
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parents:
9623
diff
changeset
|
470 |
return !hr->isHumongous(); |
51267b5e1a3d
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parents:
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diff
changeset
|
471 |
} |
51267b5e1a3d
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parents:
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diff
changeset
|
472 |
} |
51267b5e1a3d
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|
473 |
|
1374 | 474 |
void G1CollectedHeap::check_ct_logs_at_safepoint() { |
475 |
DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
|
20309 | 476 |
CardTableModRefBS* ct_bs = g1_barrier_set(); |
1374 | 477 |
|
478 |
// Count the dirty cards at the start. |
|
479 |
CountNonCleanMemRegionClosure count1(this); |
|
480 |
ct_bs->mod_card_iterate(&count1); |
|
481 |
int orig_count = count1.n(); |
|
482 |
||
483 |
// First clear the logged cards. |
|
484 |
ClearLoggedCardTableEntryClosure clear; |
|
485 |
dcqs.set_closure(&clear); |
|
486 |
dcqs.apply_closure_to_all_completed_buffers(); |
|
487 |
dcqs.iterate_closure_all_threads(false); |
|
488 |
clear.print_histo(); |
|
489 |
||
490 |
// Now ensure that there's no dirty cards. |
|
491 |
CountNonCleanMemRegionClosure count2(this); |
|
492 |
ct_bs->mod_card_iterate(&count2); |
|
493 |
if (count2.n() != 0) { |
|
494 |
gclog_or_tty->print_cr("Card table has %d entries; %d originally", |
|
495 |
count2.n(), orig_count); |
|
496 |
} |
|
497 |
guarantee(count2.n() == 0, "Card table should be clean."); |
|
498 |
||
499 |
RedirtyLoggedCardTableEntryClosure redirty; |
|
500 |
JavaThread::dirty_card_queue_set().set_closure(&redirty); |
|
501 |
dcqs.apply_closure_to_all_completed_buffers(); |
|
502 |
dcqs.iterate_closure_all_threads(false); |
|
503 |
gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", |
|
504 |
clear.calls(), orig_count); |
|
505 |
guarantee(redirty.calls() == clear.calls(), |
|
506 |
"Or else mechanism is broken."); |
|
507 |
||
508 |
CountNonCleanMemRegionClosure count3(this); |
|
509 |
ct_bs->mod_card_iterate(&count3); |
|
510 |
if (count3.n() != orig_count) { |
|
511 |
gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", |
|
512 |
orig_count, count3.n()); |
|
513 |
guarantee(count3.n() >= orig_count, "Should have restored them all."); |
|
514 |
} |
|
515 |
||
516 |
JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); |
|
517 |
} |
|
518 |
||
519 |
// Private class members. |
|
520 |
||
521 |
G1CollectedHeap* G1CollectedHeap::_g1h; |
|
522 |
||
523 |
// Private methods. |
|
524 |
||
7923 | 525 |
HeapRegion* |
8680 | 526 |
G1CollectedHeap::new_region_try_secondary_free_list() { |
7923 | 527 |
MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
528 |
while (!_secondary_free_list.is_empty() || free_regions_coming()) { |
|
529 |
if (!_secondary_free_list.is_empty()) { |
|
530 |
if (G1ConcRegionFreeingVerbose) { |
|
531 |
gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " |
|
12381
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parents:
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diff
changeset
|
532 |
"secondary_free_list has %u entries", |
7923 | 533 |
_secondary_free_list.length()); |
534 |
} |
|
535 |
// It looks as if there are free regions available on the |
|
536 |
// secondary_free_list. Let's move them to the free_list and try |
|
537 |
// again to allocate from it. |
|
538 |
append_secondary_free_list(); |
|
539 |
||
540 |
assert(!_free_list.is_empty(), "if the secondary_free_list was not " |
|
541 |
"empty we should have moved at least one entry to the free_list"); |
|
542 |
HeapRegion* res = _free_list.remove_head(); |
|
543 |
if (G1ConcRegionFreeingVerbose) { |
|
544 |
gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " |
|
545 |
"allocated "HR_FORMAT" from secondary_free_list", |
|
546 |
HR_FORMAT_PARAMS(res)); |
|
547 |
} |
|
548 |
return res; |
|
549 |
} |
|
550 |
||
18025 | 551 |
// Wait here until we get notified either when (a) there are no |
7923 | 552 |
// more free regions coming or (b) some regions have been moved on |
553 |
// the secondary_free_list. |
|
554 |
SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); |
|
555 |
} |
|
556 |
||
557 |
if (G1ConcRegionFreeingVerbose) { |
|
558 |
gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " |
|
559 |
"could not allocate from secondary_free_list"); |
|
560 |
} |
|
561 |
return NULL; |
|
562 |
} |
|
563 |
||
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
564 |
HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool do_expand) { |
10677
370a8da2d63f
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
10674
diff
changeset
|
565 |
assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
7923 | 566 |
"the only time we use this to allocate a humongous region is " |
567 |
"when we are allocating a single humongous region"); |
|
568 |
||
569 |
HeapRegion* res; |
|
570 |
if (G1StressConcRegionFreeing) { |
|
571 |
if (!_secondary_free_list.is_empty()) { |
|
572 |
if (G1ConcRegionFreeingVerbose) { |
|
573 |
gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " |
|
574 |
"forced to look at the secondary_free_list"); |
|
575 |
} |
|
8680 | 576 |
res = new_region_try_secondary_free_list(); |
7923 | 577 |
if (res != NULL) { |
578 |
return res; |
|
579 |
} |
|
580 |
} |
|
581 |
} |
|
582 |
res = _free_list.remove_head_or_null(); |
|
583 |
if (res == NULL) { |
|
584 |
if (G1ConcRegionFreeingVerbose) { |
|
585 |
gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " |
|
586 |
"res == NULL, trying the secondary_free_list"); |
|
587 |
} |
|
8680 | 588 |
res = new_region_try_secondary_free_list(); |
7923 | 589 |
} |
11449
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
590 |
if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
591 |
// Currently, only attempts to allocate GC alloc regions set |
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
592 |
// do_expand to true. So, we should only reach here during a |
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
593 |
// safepoint. If this assumption changes we might have to |
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
594 |
// reconsider the use of _expand_heap_after_alloc_failure. |
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
595 |
assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
596 |
|
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
597 |
ergo_verbose1(ErgoHeapSizing, |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
598 |
"attempt heap expansion", |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
599 |
ergo_format_reason("region allocation request failed") |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
600 |
ergo_format_byte("allocation request"), |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
601 |
word_size * HeapWordSize); |
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
602 |
if (expand(word_size * HeapWordSize)) { |
11449
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
603 |
// Given that expand() succeeded in expanding the heap, and we |
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
604 |
// always expand the heap by an amount aligned to the heap |
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
605 |
// region size, the free list should in theory not be empty. So |
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
606 |
// it would probably be OK to use remove_head(). But the extra |
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
607 |
// check for NULL is unlikely to be a performance issue here (we |
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
608 |
// just expanded the heap!) so let's just be conservative and |
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
609 |
// use remove_head_or_null(). |
9989 | 610 |
res = _free_list.remove_head_or_null(); |
11449
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
611 |
} else { |
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
612 |
_expand_heap_after_alloc_failure = false; |
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
613 |
} |
1374 | 614 |
} |
615 |
return res; |
|
616 |
} |
|
617 |
||
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
618 |
uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
619 |
size_t word_size) { |
8680 | 620 |
assert(isHumongous(word_size), "word_size should be humongous"); |
621 |
assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); |
|
622 |
||
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
623 |
uint first = G1_NULL_HRS_INDEX; |
7923 | 624 |
if (num_regions == 1) { |
625 |
// Only one region to allocate, no need to go through the slower |
|
18025 | 626 |
// path. The caller will attempt the expansion if this fails, so |
7923 | 627 |
// let's not try to expand here too. |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
628 |
HeapRegion* hr = new_region(word_size, false /* do_expand */); |
7923 | 629 |
if (hr != NULL) { |
630 |
first = hr->hrs_index(); |
|
631 |
} else { |
|
9989 | 632 |
first = G1_NULL_HRS_INDEX; |
7923 | 633 |
} |
634 |
} else { |
|
635 |
// We can't allocate humongous regions while cleanupComplete() is |
|
636 |
// running, since some of the regions we find to be empty might not |
|
637 |
// yet be added to the free list and it is not straightforward to |
|
638 |
// know which list they are on so that we can remove them. Note |
|
639 |
// that we only need to do this if we need to allocate more than |
|
640 |
// one region to satisfy the current humongous allocation |
|
641 |
// request. If we are only allocating one region we use the common |
|
642 |
// region allocation code (see above). |
|
643 |
wait_while_free_regions_coming(); |
|
8680 | 644 |
append_secondary_free_list_if_not_empty_with_lock(); |
7923 | 645 |
|
646 |
if (free_regions() >= num_regions) { |
|
9989 | 647 |
first = _hrs.find_contiguous(num_regions); |
648 |
if (first != G1_NULL_HRS_INDEX) { |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
649 |
for (uint i = first; i < first + num_regions; ++i) { |
9989 | 650 |
HeapRegion* hr = region_at(i); |
7923 | 651 |
assert(hr->is_empty(), "sanity"); |
8680 | 652 |
assert(is_on_master_free_list(hr), "sanity"); |
7923 | 653 |
hr->set_pending_removal(true); |
654 |
} |
|
655 |
_free_list.remove_all_pending(num_regions); |
|
656 |
} |
|
657 |
} |
|
658 |
} |
|
659 |
return first; |
|
660 |
} |
|
661 |
||
8680 | 662 |
HeapWord* |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
663 |
G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
664 |
uint num_regions, |
8680 | 665 |
size_t word_size) { |
9989 | 666 |
assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
8680 | 667 |
assert(isHumongous(word_size), "word_size should be humongous"); |
668 |
assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); |
|
669 |
||
670 |
// Index of last region in the series + 1. |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
671 |
uint last = first + num_regions; |
8680 | 672 |
|
673 |
// We need to initialize the region(s) we just discovered. This is |
|
674 |
// a bit tricky given that it can happen concurrently with |
|
675 |
// refinement threads refining cards on these regions and |
|
676 |
// potentially wanting to refine the BOT as they are scanning |
|
677 |
// those cards (this can happen shortly after a cleanup; see CR |
|
678 |
// 6991377). So we have to set up the region(s) carefully and in |
|
679 |
// a specific order. |
|
680 |
||
681 |
// The word size sum of all the regions we will allocate. |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
682 |
size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
8680 | 683 |
assert(word_size <= word_size_sum, "sanity"); |
684 |
||
685 |
// This will be the "starts humongous" region. |
|
9989 | 686 |
HeapRegion* first_hr = region_at(first); |
8680 | 687 |
// The header of the new object will be placed at the bottom of |
688 |
// the first region. |
|
689 |
HeapWord* new_obj = first_hr->bottom(); |
|
690 |
// This will be the new end of the first region in the series that |
|
18025 | 691 |
// should also match the end of the last region in the series. |
8680 | 692 |
HeapWord* new_end = new_obj + word_size_sum; |
693 |
// This will be the new top of the first region that will reflect |
|
694 |
// this allocation. |
|
695 |
HeapWord* new_top = new_obj + word_size; |
|
696 |
||
697 |
// First, we need to zero the header of the space that we will be |
|
698 |
// allocating. When we update top further down, some refinement |
|
699 |
// threads might try to scan the region. By zeroing the header we |
|
700 |
// ensure that any thread that will try to scan the region will |
|
701 |
// come across the zero klass word and bail out. |
|
702 |
// |
|
703 |
// NOTE: It would not have been correct to have used |
|
704 |
// CollectedHeap::fill_with_object() and make the space look like |
|
705 |
// an int array. The thread that is doing the allocation will |
|
706 |
// later update the object header to a potentially different array |
|
707 |
// type and, for a very short period of time, the klass and length |
|
708 |
// fields will be inconsistent. This could cause a refinement |
|
709 |
// thread to calculate the object size incorrectly. |
|
710 |
Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); |
|
711 |
||
712 |
// We will set up the first region as "starts humongous". This |
|
713 |
// will also update the BOT covering all the regions to reflect |
|
714 |
// that there is a single object that starts at the bottom of the |
|
715 |
// first region. |
|
716 |
first_hr->set_startsHumongous(new_top, new_end); |
|
717 |
||
718 |
// Then, if there are any, we will set up the "continues |
|
719 |
// humongous" regions. |
|
720 |
HeapRegion* hr = NULL; |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
721 |
for (uint i = first + 1; i < last; ++i) { |
9989 | 722 |
hr = region_at(i); |
8680 | 723 |
hr->set_continuesHumongous(first_hr); |
724 |
} |
|
725 |
// If we have "continues humongous" regions (hr != NULL), then the |
|
726 |
// end of the last one should match new_end. |
|
727 |
assert(hr == NULL || hr->end() == new_end, "sanity"); |
|
728 |
||
729 |
// Up to this point no concurrent thread would have been able to |
|
730 |
// do any scanning on any region in this series. All the top |
|
731 |
// fields still point to bottom, so the intersection between |
|
732 |
// [bottom,top] and [card_start,card_end] will be empty. Before we |
|
733 |
// update the top fields, we'll do a storestore to make sure that |
|
734 |
// no thread sees the update to top before the zeroing of the |
|
735 |
// object header and the BOT initialization. |
|
736 |
OrderAccess::storestore(); |
|
737 |
||
738 |
// Now that the BOT and the object header have been initialized, |
|
739 |
// we can update top of the "starts humongous" region. |
|
740 |
assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), |
|
741 |
"new_top should be in this region"); |
|
742 |
first_hr->set_top(new_top); |
|
10001
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
743 |
if (_hr_printer.is_active()) { |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
744 |
HeapWord* bottom = first_hr->bottom(); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
745 |
HeapWord* end = first_hr->orig_end(); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
746 |
if ((first + 1) == last) { |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
747 |
// the series has a single humongous region |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
748 |
_hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
749 |
} else { |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
750 |
// the series has more than one humongous regions |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
751 |
_hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
752 |
} |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
753 |
} |
8680 | 754 |
|
755 |
// Now, we will update the top fields of the "continues humongous" |
|
756 |
// regions. The reason we need to do this is that, otherwise, |
|
757 |
// these regions would look empty and this will confuse parts of |
|
758 |
// G1. For example, the code that looks for a consecutive number |
|
759 |
// of empty regions will consider them empty and try to |
|
760 |
// re-allocate them. We can extend is_empty() to also include |
|
761 |
// !continuesHumongous(), but it is easier to just update the top |
|
762 |
// fields here. The way we set top for all regions (i.e., top == |
|
763 |
// end for all regions but the last one, top == new_top for the |
|
764 |
// last one) is actually used when we will free up the humongous |
|
765 |
// region in free_humongous_region(). |
|
766 |
hr = NULL; |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
767 |
for (uint i = first + 1; i < last; ++i) { |
9989 | 768 |
hr = region_at(i); |
8680 | 769 |
if ((i + 1) == last) { |
770 |
// last continues humongous region |
|
771 |
assert(hr->bottom() < new_top && new_top <= hr->end(), |
|
772 |
"new_top should fall on this region"); |
|
773 |
hr->set_top(new_top); |
|
10001
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
774 |
_hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
8680 | 775 |
} else { |
776 |
// not last one |
|
777 |
assert(new_top > hr->end(), "new_top should be above this region"); |
|
778 |
hr->set_top(hr->end()); |
|
10001
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
779 |
_hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
8680 | 780 |
} |
781 |
} |
|
782 |
// If we have continues humongous regions (hr != NULL), then the |
|
783 |
// end of the last one should match new_end and its top should |
|
784 |
// match new_top. |
|
785 |
assert(hr == NULL || |
|
786 |
(hr->end() == new_end && hr->top() == new_top), "sanity"); |
|
787 |
||
788 |
assert(first_hr->used() == word_size * HeapWordSize, "invariant"); |
|
789 |
_summary_bytes_used += first_hr->used(); |
|
790 |
_humongous_set.add(first_hr); |
|
791 |
||
792 |
return new_obj; |
|
793 |
} |
|
794 |
||
1374 | 795 |
// If could fit into free regions w/o expansion, try. |
796 |
// Otherwise, if can expand, do so. |
|
797 |
// Otherwise, if using ex regions might help, try with ex given back. |
|
7398 | 798 |
HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
7923 | 799 |
assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
800 |
||
801 |
verify_region_sets_optional(); |
|
1374 | 802 |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
803 |
size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
804 |
uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
805 |
uint x_num = expansion_regions(); |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
806 |
uint fs = _hrs.free_suffix(); |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
807 |
uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
9989 | 808 |
if (first == G1_NULL_HRS_INDEX) { |
7923 | 809 |
// The only thing we can do now is attempt expansion. |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
810 |
if (fs + x_num >= num_regions) { |
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
811 |
// If the number of regions we're trying to allocate for this |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
812 |
// object is at most the number of regions in the free suffix, |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
813 |
// then the call to humongous_obj_allocate_find_first() above |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
814 |
// should have succeeded and we wouldn't be here. |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
815 |
// |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
816 |
// We should only be trying to expand when the free suffix is |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
817 |
// not sufficient for the object _and_ we have some expansion |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
818 |
// room available. |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
819 |
assert(num_regions > fs, "earlier allocation should have succeeded"); |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
820 |
|
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
821 |
ergo_verbose1(ErgoHeapSizing, |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
822 |
"attempt heap expansion", |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
823 |
ergo_format_reason("humongous allocation request failed") |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
824 |
ergo_format_byte("allocation request"), |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
825 |
word_size * HeapWordSize); |
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
826 |
if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
9989 | 827 |
// Even though the heap was expanded, it might not have |
828 |
// reached the desired size. So, we cannot assume that the |
|
829 |
// allocation will succeed. |
|
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
830 |
first = humongous_obj_allocate_find_first(num_regions, word_size); |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
831 |
} |
7923 | 832 |
} |
833 |
} |
|
834 |
||
8680 | 835 |
HeapWord* result = NULL; |
9989 | 836 |
if (first != G1_NULL_HRS_INDEX) { |
8680 | 837 |
result = |
838 |
humongous_obj_allocate_initialize_regions(first, num_regions, word_size); |
|
839 |
assert(result != NULL, "it should always return a valid result"); |
|
10671
431ff8629f97
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
10670
diff
changeset
|
840 |
|
431ff8629f97
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
10670
diff
changeset
|
841 |
// A successful humongous object allocation changes the used space |
431ff8629f97
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
10670
diff
changeset
|
842 |
// information of the old generation so we need to recalculate the |
431ff8629f97
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
10670
diff
changeset
|
843 |
// sizes and update the jstat counters here. |
431ff8629f97
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
10670
diff
changeset
|
844 |
g1mm()->update_sizes(); |
7923 | 845 |
} |
846 |
||
847 |
verify_region_sets_optional(); |
|
8680 | 848 |
|
849 |
return result; |
|
1374 | 850 |
} |
851 |
||
7398 | 852 |
HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
853 |
assert_heap_not_locked_and_not_at_safepoint(); |
|
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
854 |
assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
855 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
856 |
unsigned int dummy_gc_count_before; |
16604
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
857 |
int dummy_gclocker_retry_count = 0; |
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
858 |
return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
1374 | 859 |
} |
860 |
||
861 |
HeapWord* |
|
862 |
G1CollectedHeap::mem_allocate(size_t word_size, |
|
7398 | 863 |
bool* gc_overhead_limit_was_exceeded) { |
864 |
assert_heap_not_locked_and_not_at_safepoint(); |
|
1374 | 865 |
|
18025 | 866 |
// Loop until the allocation is satisfied, or unsatisfied after GC. |
16604
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
867 |
for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
7398 | 868 |
unsigned int gc_count_before; |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
869 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
870 |
HeapWord* result = NULL; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
871 |
if (!isHumongous(word_size)) { |
16604
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
872 |
result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
873 |
} else { |
16604
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
874 |
result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
875 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
876 |
if (result != NULL) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
877 |
return result; |
1374 | 878 |
} |
879 |
||
880 |
// Create the garbage collection operation... |
|
7398 | 881 |
VM_G1CollectForAllocation op(gc_count_before, word_size); |
1374 | 882 |
// ...and get the VM thread to execute it. |
883 |
VMThread::execute(&op); |
|
7398 | 884 |
|
885 |
if (op.prologue_succeeded() && op.pause_succeeded()) { |
|
886 |
// If the operation was successful we'll return the result even |
|
887 |
// if it is NULL. If the allocation attempt failed immediately |
|
888 |
// after a Full GC, it's unlikely we'll be able to allocate now. |
|
889 |
HeapWord* result = op.result(); |
|
890 |
if (result != NULL && !isHumongous(word_size)) { |
|
891 |
// Allocations that take place on VM operations do not do any |
|
892 |
// card dirtying and we have to do it here. We only have to do |
|
893 |
// this for non-humongous allocations, though. |
|
894 |
dirty_young_block(result, word_size); |
|
895 |
} |
|
1374 | 896 |
return result; |
7398 | 897 |
} else { |
16604
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
898 |
if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
899 |
return NULL; |
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
900 |
} |
7398 | 901 |
assert(op.result() == NULL, |
902 |
"the result should be NULL if the VM op did not succeed"); |
|
1374 | 903 |
} |
904 |
||
905 |
// Give a warning if we seem to be looping forever. |
|
906 |
if ((QueuedAllocationWarningCount > 0) && |
|
907 |
(try_count % QueuedAllocationWarningCount == 0)) { |
|
7398 | 908 |
warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
1374 | 909 |
} |
910 |
} |
|
7398 | 911 |
|
912 |
ShouldNotReachHere(); |
|
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
913 |
return NULL; |
1374 | 914 |
} |
915 |
||
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
916 |
HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
16604
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
917 |
unsigned int *gc_count_before_ret, |
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
918 |
int* gclocker_retry_count_ret) { |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
919 |
// Make sure you read the note in attempt_allocation_humongous(). |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
920 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
921 |
assert_heap_not_locked_and_not_at_safepoint(); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
922 |
assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
923 |
"be called for humongous allocation requests"); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
924 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
925 |
// We should only get here after the first-level allocation attempt |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
926 |
// (attempt_allocation()) failed to allocate. |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
927 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
928 |
// We will loop until a) we manage to successfully perform the |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
929 |
// allocation or b) we successfully schedule a collection which |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
930 |
// fails to perform the allocation. b) is the only case when we'll |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
931 |
// return NULL. |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
932 |
HeapWord* result = NULL; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
933 |
for (int try_count = 1; /* we'll return */; try_count += 1) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
934 |
bool should_try_gc; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
935 |
unsigned int gc_count_before; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
936 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
937 |
{ |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
938 |
MutexLockerEx x(Heap_lock); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
939 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
940 |
result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
941 |
false /* bot_updates */); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
942 |
if (result != NULL) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
943 |
return result; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
944 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
945 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
946 |
// If we reach here, attempt_allocation_locked() above failed to |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
947 |
// allocate a new region. So the mutator alloc region should be NULL. |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
948 |
assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
949 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
950 |
if (GC_locker::is_active_and_needs_gc()) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
951 |
if (g1_policy()->can_expand_young_list()) { |
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
952 |
// No need for an ergo verbose message here, |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
953 |
// can_expand_young_list() does this when it returns true. |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
954 |
result = _mutator_alloc_region.attempt_allocation_force(word_size, |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
955 |
false /* bot_updates */); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
956 |
if (result != NULL) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
957 |
return result; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
958 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
959 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
960 |
should_try_gc = false; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
961 |
} else { |
12778
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
962 |
// The GCLocker may not be active but the GCLocker initiated |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
963 |
// GC may not yet have been performed (GCLocker::needs_gc() |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
964 |
// returns true). In this case we do not try this GC and |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
965 |
// wait until the GCLocker initiated GC is performed, and |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
966 |
// then retry the allocation. |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
967 |
if (GC_locker::needs_gc()) { |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
968 |
should_try_gc = false; |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
969 |
} else { |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
970 |
// Read the GC count while still holding the Heap_lock. |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
971 |
gc_count_before = total_collections(); |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
972 |
should_try_gc = true; |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
973 |
} |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
974 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
975 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
976 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
977 |
if (should_try_gc) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
978 |
bool succeeded; |
19549
60e5c7cafdca
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
19341
diff
changeset
|
979 |
result = do_collection_pause(word_size, gc_count_before, &succeeded, |
60e5c7cafdca
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
19341
diff
changeset
|
980 |
GCCause::_g1_inc_collection_pause); |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
981 |
if (result != NULL) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
982 |
assert(succeeded, "only way to get back a non-NULL result"); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
983 |
return result; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
984 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
985 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
986 |
if (succeeded) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
987 |
// If we get here we successfully scheduled a collection which |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
988 |
// failed to allocate. No point in trying to allocate |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
989 |
// further. We'll just return NULL. |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
990 |
MutexLockerEx x(Heap_lock); |
11754
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
991 |
*gc_count_before_ret = total_collections(); |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
992 |
return NULL; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
993 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
994 |
} else { |
16604
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
995 |
if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
996 |
MutexLockerEx x(Heap_lock); |
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
997 |
*gc_count_before_ret = total_collections(); |
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
998 |
return NULL; |
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
999 |
} |
12778
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1000 |
// The GCLocker is either active or the GCLocker initiated |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1001 |
// GC has not yet been performed. Stall until it is and |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1002 |
// then retry the allocation. |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1003 |
GC_locker::stall_until_clear(); |
16604
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
1004 |
(*gclocker_retry_count_ret) += 1; |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1005 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1006 |
|
18025 | 1007 |
// We can reach here if we were unsuccessful in scheduling a |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1008 |
// collection (because another thread beat us to it) or if we were |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1009 |
// stalled due to the GC locker. In either can we should retry the |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1010 |
// allocation attempt in case another thread successfully |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1011 |
// performed a collection and reclaimed enough space. We do the |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1012 |
// first attempt (without holding the Heap_lock) here and the |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1013 |
// follow-on attempt will be at the start of the next loop |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1014 |
// iteration (after taking the Heap_lock). |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1015 |
result = _mutator_alloc_region.attempt_allocation(word_size, |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1016 |
false /* bot_updates */); |
12227
371690c4f281
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
11756
diff
changeset
|
1017 |
if (result != NULL) { |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1018 |
return result; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1019 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1020 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1021 |
// Give a warning if we seem to be looping forever. |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1022 |
if ((QueuedAllocationWarningCount > 0) && |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1023 |
(try_count % QueuedAllocationWarningCount == 0)) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1024 |
warning("G1CollectedHeap::attempt_allocation_slow() " |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1025 |
"retries %d times", try_count); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1026 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1027 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1028 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1029 |
ShouldNotReachHere(); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1030 |
return NULL; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1031 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1032 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1033 |
HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
16604
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
1034 |
unsigned int * gc_count_before_ret, |
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
1035 |
int* gclocker_retry_count_ret) { |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1036 |
// The structure of this method has a lot of similarities to |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1037 |
// attempt_allocation_slow(). The reason these two were not merged |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1038 |
// into a single one is that such a method would require several "if |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1039 |
// allocation is not humongous do this, otherwise do that" |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1040 |
// conditional paths which would obscure its flow. In fact, an early |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1041 |
// version of this code did use a unified method which was harder to |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1042 |
// follow and, as a result, it had subtle bugs that were hard to |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1043 |
// track down. So keeping these two methods separate allows each to |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1044 |
// be more readable. It will be good to keep these two in sync as |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1045 |
// much as possible. |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1046 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
1047 |
assert_heap_not_locked_and_not_at_safepoint(); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
1048 |
assert(isHumongous(word_size), "attempt_allocation_humongous() " |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1049 |
"should only be called for humongous allocations"); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1050 |
|
11581
b1afc51ad34e
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
11580
diff
changeset
|
1051 |
// Humongous objects can exhaust the heap quickly, so we should check if we |
b1afc51ad34e
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
11580
diff
changeset
|
1052 |
// need to start a marking cycle at each humongous object allocation. We do |
b1afc51ad34e
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
11580
diff
changeset
|
1053 |
// the check before we do the actual allocation. The reason for doing it |
b1afc51ad34e
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
11580
diff
changeset
|
1054 |
// before the allocation is that we avoid having to keep track of the newly |
b1afc51ad34e
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
11580
diff
changeset
|
1055 |
// allocated memory while we do a GC. |
11754
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
1056 |
if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
1057 |
word_size)) { |
11581
b1afc51ad34e
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
11580
diff
changeset
|
1058 |
collect(GCCause::_g1_humongous_allocation); |
b1afc51ad34e
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
11580
diff
changeset
|
1059 |
} |
b1afc51ad34e
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
11580
diff
changeset
|
1060 |
|
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1061 |
// We will loop until a) we manage to successfully perform the |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1062 |
// allocation or b) we successfully schedule a collection which |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1063 |
// fails to perform the allocation. b) is the only case when we'll |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1064 |
// return NULL. |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
1065 |
HeapWord* result = NULL; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1066 |
for (int try_count = 1; /* we'll return */; try_count += 1) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1067 |
bool should_try_gc; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1068 |
unsigned int gc_count_before; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1069 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1070 |
{ |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
1071 |
MutexLockerEx x(Heap_lock); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1072 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1073 |
// Given that humongous objects are not allocated in young |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1074 |
// regions, we'll first try to do the allocation without doing a |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1075 |
// collection hoping that there's enough space in the heap. |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1076 |
result = humongous_obj_allocate(word_size); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1077 |
if (result != NULL) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1078 |
return result; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1079 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1080 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1081 |
if (GC_locker::is_active_and_needs_gc()) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1082 |
should_try_gc = false; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1083 |
} else { |
12778
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1084 |
// The GCLocker may not be active but the GCLocker initiated |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1085 |
// GC may not yet have been performed (GCLocker::needs_gc() |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1086 |
// returns true). In this case we do not try this GC and |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1087 |
// wait until the GCLocker initiated GC is performed, and |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1088 |
// then retry the allocation. |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1089 |
if (GC_locker::needs_gc()) { |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1090 |
should_try_gc = false; |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1091 |
} else { |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1092 |
// Read the GC count while still holding the Heap_lock. |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1093 |
gc_count_before = total_collections(); |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1094 |
should_try_gc = true; |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1095 |
} |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1096 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1097 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1098 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1099 |
if (should_try_gc) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1100 |
// If we failed to allocate the humongous object, we should try to |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1101 |
// do a collection pause (if we're allowed) in case it reclaims |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1102 |
// enough space for the allocation to succeed after the pause. |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1103 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1104 |
bool succeeded; |
19549
60e5c7cafdca
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
19341
diff
changeset
|
1105 |
result = do_collection_pause(word_size, gc_count_before, &succeeded, |
60e5c7cafdca
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
19341
diff
changeset
|
1106 |
GCCause::_g1_humongous_allocation); |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1107 |
if (result != NULL) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1108 |
assert(succeeded, "only way to get back a non-NULL result"); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1109 |
return result; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1110 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1111 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1112 |
if (succeeded) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1113 |
// If we get here we successfully scheduled a collection which |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1114 |
// failed to allocate. No point in trying to allocate |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1115 |
// further. We'll just return NULL. |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1116 |
MutexLockerEx x(Heap_lock); |
11754
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
1117 |
*gc_count_before_ret = total_collections(); |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1118 |
return NULL; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1119 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1120 |
} else { |
16604
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
1121 |
if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
1122 |
MutexLockerEx x(Heap_lock); |
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
1123 |
*gc_count_before_ret = total_collections(); |
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
1124 |
return NULL; |
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
1125 |
} |
12778
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1126 |
// The GCLocker is either active or the GCLocker initiated |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1127 |
// GC has not yet been performed. Stall until it is and |
b2bee9c4b41d
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
12630
diff
changeset
|
1128 |
// then retry the allocation. |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1129 |
GC_locker::stall_until_clear(); |
16604
800a65bfe347
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
15608
diff
changeset
|
1130 |
(*gclocker_retry_count_ret) += 1; |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1131 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1132 |
|
18025 | 1133 |
// We can reach here if we were unsuccessful in scheduling a |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1134 |
// collection (because another thread beat us to it) or if we were |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1135 |
// stalled due to the GC locker. In either can we should retry the |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1136 |
// allocation attempt in case another thread successfully |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1137 |
// performed a collection and reclaimed enough space. Give a |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1138 |
// warning if we seem to be looping forever. |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1139 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1140 |
if ((QueuedAllocationWarningCount > 0) && |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1141 |
(try_count % QueuedAllocationWarningCount == 0)) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1142 |
warning("G1CollectedHeap::attempt_allocation_humongous() " |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1143 |
"retries %d times", try_count); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1144 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1145 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1146 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1147 |
ShouldNotReachHere(); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1148 |
return NULL; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1149 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1150 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1151 |
HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1152 |
bool expect_null_mutator_alloc_region) { |
7923 | 1153 |
assert_at_safepoint(true /* should_be_vm_thread */); |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1154 |
assert(_mutator_alloc_region.get() == NULL || |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1155 |
!expect_null_mutator_alloc_region, |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1156 |
"the current alloc region was unexpectedly found to be non-NULL"); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1157 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1158 |
if (!isHumongous(word_size)) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1159 |
return _mutator_alloc_region.attempt_allocation_locked(word_size, |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1160 |
false /* bot_updates */); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1161 |
} else { |
11576
e0bef5ca4602
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
11455
diff
changeset
|
1162 |
HeapWord* result = humongous_obj_allocate(word_size); |
e0bef5ca4602
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
11455
diff
changeset
|
1163 |
if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
e0bef5ca4602
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
11455
diff
changeset
|
1164 |
g1_policy()->set_initiate_conc_mark_if_possible(); |
e0bef5ca4602
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
11455
diff
changeset
|
1165 |
} |
e0bef5ca4602
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
11455
diff
changeset
|
1166 |
return result; |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1167 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1168 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1169 |
ShouldNotReachHere(); |
1374 | 1170 |
} |
1171 |
||
1172 |
class PostMCRemSetClearClosure: public HeapRegionClosure { |
|
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
1173 |
G1CollectedHeap* _g1h; |
1374 | 1174 |
ModRefBarrierSet* _mr_bs; |
1175 |
public: |
|
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
1176 |
PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
19339 | 1177 |
_g1h(g1h), _mr_bs(mr_bs) {} |
1178 |
||
1374 | 1179 |
bool doHeapRegion(HeapRegion* r) { |
19339 | 1180 |
HeapRegionRemSet* hrrs = r->rem_set(); |
1181 |
||
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
1182 |
if (r->continuesHumongous()) { |
19339 | 1183 |
// We'll assert that the strong code root list and RSet is empty |
1184 |
assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); |
|
1185 |
assert(hrrs->occupied() == 0, "RSet should be empty"); |
|
1374 | 1186 |
return false; |
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
1187 |
} |
19339 | 1188 |
|
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
1189 |
_g1h->reset_gc_time_stamps(r); |
19339 | 1190 |
hrrs->clear(); |
1374 | 1191 |
// You might think here that we could clear just the cards |
1192 |
// corresponding to the used region. But no: if we leave a dirty card |
|
1193 |
// in a region we might allocate into, then it would prevent that card |
|
1194 |
// from being enqueued, and cause it to be missed. |
|
1195 |
// Re: the performance cost: we shouldn't be doing full GC anyway! |
|
1196 |
_mr_bs->clear(MemRegion(r->bottom(), r->end())); |
|
19339 | 1197 |
|
1374 | 1198 |
return false; |
1199 |
} |
|
1200 |
}; |
|
1201 |
||
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
1202 |
void G1CollectedHeap::clear_rsets_post_compaction() { |
20309 | 1203 |
PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
1204 |
heap_region_iterate(&rs_clear); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
1205 |
} |
1374 | 1206 |
|
2152
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1207 |
class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1208 |
G1CollectedHeap* _g1h; |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1209 |
UpdateRSOopClosure _cl; |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1210 |
int _worker_i; |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1211 |
public: |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1212 |
RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
6958 | 1213 |
_cl(g1->g1_rem_set(), worker_i), |
2152
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1214 |
_worker_i(worker_i), |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1215 |
_g1h(g1) |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1216 |
{ } |
7385
eaca4b61b374
6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
johnc
parents:
6980
diff
changeset
|
1217 |
|
2152
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1218 |
bool doHeapRegion(HeapRegion* r) { |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1219 |
if (!r->continuesHumongous()) { |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1220 |
_cl.set_from(r); |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1221 |
r->oop_iterate(&_cl); |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1222 |
} |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1223 |
return false; |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1224 |
} |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1225 |
}; |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1226 |
|
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1227 |
class ParRebuildRSTask: public AbstractGangTask { |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1228 |
G1CollectedHeap* _g1; |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1229 |
public: |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1230 |
ParRebuildRSTask(G1CollectedHeap* g1) |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1231 |
: AbstractGangTask("ParRebuildRSTask"), |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1232 |
_g1(g1) |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1233 |
{ } |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1234 |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
1235 |
void work(uint worker_id) { |
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
1236 |
RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
1237 |
_g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
1238 |
_g1->workers()->active_workers(), |
2152
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1239 |
HeapRegion::RebuildRSClaimValue); |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1240 |
} |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1241 |
}; |
99356e7f31b1
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
2146
diff
changeset
|
1242 |
|
10001
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1243 |
class PostCompactionPrinterClosure: public HeapRegionClosure { |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1244 |
private: |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1245 |
G1HRPrinter* _hr_printer; |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1246 |
public: |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1247 |
bool doHeapRegion(HeapRegion* hr) { |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1248 |
assert(!hr->is_young(), "not expecting to find young regions"); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1249 |
// We only generate output for non-empty regions. |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1250 |
if (!hr->is_empty()) { |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1251 |
if (!hr->isHumongous()) { |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1252 |
_hr_printer->post_compaction(hr, G1HRPrinter::Old); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1253 |
} else if (hr->startsHumongous()) { |
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
1254 |
if (hr->region_num() == 1) { |
10001
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1255 |
// single humongous region |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1256 |
_hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1257 |
} else { |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1258 |
_hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1259 |
} |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1260 |
} else { |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1261 |
assert(hr->continuesHumongous(), "only way to get here"); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1262 |
_hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1263 |
} |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1264 |
} |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1265 |
return false; |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1266 |
} |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1267 |
|
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1268 |
PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1269 |
: _hr_printer(hr_printer) { } |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1270 |
}; |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1271 |
|
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
1272 |
void G1CollectedHeap::print_hrs_post_compaction() { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
1273 |
PostCompactionPrinterClosure cl(hr_printer()); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
1274 |
heap_region_iterate(&cl); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
1275 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
1276 |
|
7398 | 1277 |
bool G1CollectedHeap::do_collection(bool explicit_gc, |
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
1278 |
bool clear_all_soft_refs, |
1374 | 1279 |
size_t word_size) { |
7923 | 1280 |
assert_at_safepoint(true /* should_be_vm_thread */); |
1281 |
||
5243
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5078
diff
changeset
|
1282 |
if (GC_locker::check_active_before_gc()) { |
7398 | 1283 |
return false; |
5243
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5078
diff
changeset
|
1284 |
} |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5078
diff
changeset
|
1285 |
|
18025 | 1286 |
STWGCTimer* gc_timer = G1MarkSweep::gc_timer(); |
1287 |
gc_timer->register_gc_start(os::elapsed_counter()); |
|
1288 |
||
1289 |
SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); |
|
1290 |
gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); |
|
1291 |
||
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7659
diff
changeset
|
1292 |
SvcGCMarker sgcm(SvcGCMarker::FULL); |
1374 | 1293 |
ResourceMark rm; |
1294 |
||
11636
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11455
diff
changeset
|
1295 |
print_heap_before_gc(); |
18025 | 1296 |
trace_heap_before_gc(gc_tracer); |
3191
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
1297 |
|
17109
90e6c31bbbe4
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
17108
diff
changeset
|
1298 |
size_t metadata_prev_used = MetaspaceAux::allocated_used_bytes(); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
1299 |
|
10996 | 1300 |
HRSPhaseSetter x(HRSPhaseFullGC); |
7923 | 1301 |
verify_region_sets_optional(); |
1374 | 1302 |
|
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5244
diff
changeset
|
1303 |
const bool do_clear_all_soft_refs = clear_all_soft_refs || |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5244
diff
changeset
|
1304 |
collector_policy()->should_clear_all_soft_refs(); |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5244
diff
changeset
|
1305 |
|
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5244
diff
changeset
|
1306 |
ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5244
diff
changeset
|
1307 |
|
1374 | 1308 |
{ |
1309 |
IsGCActiveMark x; |
|
1310 |
||
1311 |
// Timing |
|
12511 | 1312 |
assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
12378
ed44b9ecfa2f
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
12271
diff
changeset
|
1313 |
gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
ed44b9ecfa2f
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
12271
diff
changeset
|
1314 |
TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
12511 | 1315 |
|
1374 | 1316 |
{ |
18025 | 1317 |
GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL); |
16993
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1318 |
TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1319 |
TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1320 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1321 |
double start = os::elapsedTime(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1322 |
g1_policy()->record_full_collection_start(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1323 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1324 |
// Note: When we have a more flexible GC logging framework that |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1325 |
// allows us to add optional attributes to a GC log record we |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1326 |
// could consider timing and reporting how long we wait in the |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1327 |
// following two methods. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1328 |
wait_while_free_regions_coming(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1329 |
// If we start the compaction before the CM threads finish |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1330 |
// scanning the root regions we might trip them over as we'll |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1331 |
// be moving objects / updating references. So let's wait until |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1332 |
// they are done. By telling them to abort, they should complete |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1333 |
// early. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1334 |
_cm->root_regions()->abort(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1335 |
_cm->root_regions()->wait_until_scan_finished(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1336 |
append_secondary_free_list_if_not_empty_with_lock(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1337 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1338 |
gc_prologue(true); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1339 |
increment_total_collections(true /* full gc */); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1340 |
increment_old_marking_cycles_started(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1341 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1342 |
assert(used() == recalculate_used(), "Should be equal"); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1343 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1344 |
verify_before_gc(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1345 |
|
18025 | 1346 |
pre_full_gc_dump(gc_timer); |
16993
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1347 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1348 |
COMPILER2_PRESENT(DerivedPointerTable::clear()); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1349 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1350 |
// Disable discovery and empty the discovered lists |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1351 |
// for the CM ref processor. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1352 |
ref_processor_cm()->disable_discovery(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1353 |
ref_processor_cm()->abandon_partial_discovery(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1354 |
ref_processor_cm()->verify_no_references_recorded(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1355 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1356 |
// Abandon current iterations of concurrent marking and concurrent |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1357 |
// refinement, if any are in progress. We have to do this before |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1358 |
// wait_until_scan_finished() below. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1359 |
concurrent_mark()->abort(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1360 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1361 |
// Make sure we'll choose a new allocation region afterwards. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1362 |
release_mutator_alloc_region(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1363 |
abandon_gc_alloc_regions(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1364 |
g1_rem_set()->cleanupHRRS(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1365 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1366 |
// We should call this after we retire any currently active alloc |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1367 |
// regions so that all the ALLOC / RETIRE events are generated |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1368 |
// before the start GC event. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1369 |
_hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1370 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1371 |
// We may have added regions to the current incremental collection |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1372 |
// set between the last GC or pause and now. We need to clear the |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1373 |
// incremental collection set and then start rebuilding it afresh |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1374 |
// after this full GC. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1375 |
abandon_collection_set(g1_policy()->inc_cset_head()); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1376 |
g1_policy()->clear_incremental_cset(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1377 |
g1_policy()->stop_incremental_cset_building(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1378 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1379 |
tear_down_region_sets(false /* free_list_only */); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1380 |
g1_policy()->set_gcs_are_young(true); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1381 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1382 |
// See the comments in g1CollectedHeap.hpp and |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1383 |
// G1CollectedHeap::ref_processing_init() about |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1384 |
// how reference processing currently works in G1. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1385 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1386 |
// Temporarily make discovery by the STW ref processor single threaded (non-MT). |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1387 |
ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1388 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1389 |
// Temporarily clear the STW ref processor's _is_alive_non_header field. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1390 |
ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1391 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1392 |
ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1393 |
ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1394 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1395 |
// Do collection work |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1396 |
{ |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1397 |
HandleMark hm; // Discard invalid handles created during gc |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1398 |
G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1399 |
} |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1400 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1401 |
assert(free_regions() == 0, "we should not have added any free regions"); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1402 |
rebuild_region_sets(false /* free_list_only */); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1403 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1404 |
// Enqueue any discovered reference objects that have |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1405 |
// not been removed from the discovered lists. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1406 |
ref_processor_stw()->enqueue_discovered_references(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1407 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1408 |
COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1409 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1410 |
MemoryService::track_memory_usage(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1411 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1412 |
assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1413 |
ref_processor_stw()->verify_no_references_recorded(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1414 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1415 |
// Delete metaspaces for unloaded class loaders and clean up loader_data graph |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1416 |
ClassLoaderDataGraph::purge(); |
19339 | 1417 |
MetaspaceAux::verify_metrics(); |
16993
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1418 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1419 |
// Note: since we've just done a full GC, concurrent |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1420 |
// marking is no longer active. Therefore we need not |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1421 |
// re-enable reference discovery for the CM ref processor. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1422 |
// That will be done at the start of the next marking cycle. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1423 |
assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1424 |
ref_processor_cm()->verify_no_references_recorded(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1425 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1426 |
reset_gc_time_stamp(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1427 |
// Since everything potentially moved, we will clear all remembered |
18025 | 1428 |
// sets, and clear all cards. Later we will rebuild remembered |
16993
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1429 |
// sets. We will also reset the GC time stamps of the regions. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1430 |
clear_rsets_post_compaction(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1431 |
check_gc_time_stamps(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1432 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1433 |
// Resize the heap if necessary. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1434 |
resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1435 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1436 |
if (_hr_printer.is_active()) { |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1437 |
// We should do this after we potentially resize the heap so |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1438 |
// that all the COMMIT / UNCOMMIT events are generated before |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1439 |
// the end GC event. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1440 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1441 |
print_hrs_post_compaction(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1442 |
_hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1443 |
} |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1444 |
|
17327
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
1445 |
G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
1446 |
if (hot_card_cache->use_cache()) { |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
1447 |
hot_card_cache->reset_card_counts(); |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
1448 |
hot_card_cache->reset_hot_cache(); |
16993
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1449 |
} |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1450 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1451 |
// Rebuild remembered sets of all regions. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1452 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1453 |
uint n_workers = |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1454 |
AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1455 |
workers()->active_workers(), |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1456 |
Threads::number_of_non_daemon_threads()); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1457 |
assert(UseDynamicNumberOfGCThreads || |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1458 |
n_workers == workers()->total_workers(), |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1459 |
"If not dynamic should be using all the workers"); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1460 |
workers()->set_active_workers(n_workers); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1461 |
// Set parallel threads in the heap (_n_par_threads) only |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1462 |
// before a parallel phase and always reset it to 0 after |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1463 |
// the phase so that the number of parallel threads does |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1464 |
// no get carried forward to a serial phase where there |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1465 |
// may be code that is "possibly_parallel". |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1466 |
set_par_threads(n_workers); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1467 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1468 |
ParRebuildRSTask rebuild_rs_task(this); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1469 |
assert(check_heap_region_claim_values( |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1470 |
HeapRegion::InitialClaimValue), "sanity check"); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1471 |
assert(UseDynamicNumberOfGCThreads || |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1472 |
workers()->active_workers() == workers()->total_workers(), |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1473 |
"Unless dynamic should use total workers"); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1474 |
// Use the most recent number of active workers |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1475 |
assert(workers()->active_workers() > 0, |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1476 |
"Active workers not properly set"); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1477 |
set_par_threads(workers()->active_workers()); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1478 |
workers()->run_task(&rebuild_rs_task); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1479 |
set_par_threads(0); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1480 |
assert(check_heap_region_claim_values( |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1481 |
HeapRegion::RebuildRSClaimValue), "sanity check"); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1482 |
reset_heap_region_claim_values(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1483 |
} else { |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1484 |
RebuildRSOutOfRegionClosure rebuild_rs(this); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1485 |
heap_region_iterate(&rebuild_rs); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1486 |
} |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1487 |
|
19339 | 1488 |
// Rebuild the strong code root lists for each region |
1489 |
rebuild_strong_code_roots(); |
|
1490 |
||
16993
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1491 |
if (true) { // FIXME |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1492 |
MetaspaceGC::compute_new_size(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1493 |
} |
1374 | 1494 |
|
2010
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
2009
diff
changeset
|
1495 |
#ifdef TRACESPINNING |
16993
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1496 |
ParallelTaskTerminator::print_termination_counts(); |
2010
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
2009
diff
changeset
|
1497 |
#endif |
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
2009
diff
changeset
|
1498 |
|
16993
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1499 |
// Discard all rset updates |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1500 |
JavaThread::dirty_card_queue_set().abandon_logs(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1501 |
assert(!G1DeferredRSUpdate |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1502 |
|| (G1DeferredRSUpdate && |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1503 |
(dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1504 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1505 |
_young_list->reset_sampled_info(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1506 |
// At this point there should be no regions in the |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1507 |
// entire heap tagged as young. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1508 |
assert(check_young_list_empty(true /* check_heap */), |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1509 |
"young list should be empty at this point"); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1510 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1511 |
// Update the number of full collections that have been completed. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1512 |
increment_old_marking_cycles_completed(false /* concurrent */); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1513 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1514 |
_hrs.verify_optional(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1515 |
verify_region_sets_optional(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1516 |
|
17855
9d0719d7bb85
8015244: G1: Verification after a full GC is incorrectly placed.
johnc
parents:
17854
diff
changeset
|
1517 |
verify_after_gc(); |
9d0719d7bb85
8015244: G1: Verification after a full GC is incorrectly placed.
johnc
parents:
17854
diff
changeset
|
1518 |
|
16993
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1519 |
// Start a new incremental collection set for the next pause |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1520 |
assert(g1_policy()->collection_set() == NULL, "must be"); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1521 |
g1_policy()->start_incremental_cset_building(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1522 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1523 |
// Clear the _cset_fast_test bitmap in anticipation of adding |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1524 |
// regions to the incremental collection set for the next |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1525 |
// evacuation pause. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1526 |
clear_cset_fast_test(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1527 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1528 |
init_mutator_alloc_region(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1529 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1530 |
double end = os::elapsedTime(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1531 |
g1_policy()->record_full_collection_end(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1532 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1533 |
if (G1Log::fine()) { |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1534 |
g1_policy()->print_heap_transition(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1535 |
} |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1536 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1537 |
// We must call G1MonitoringSupport::update_sizes() in the same scoping level |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1538 |
// as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1539 |
// TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1540 |
// before any GC notifications are raised. |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1541 |
g1mm()->update_sizes(); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1542 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1543 |
gc_epilogue(true); |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1544 |
} |
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1545 |
|
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1546 |
if (G1Log::finer()) { |
17396
4d281f3a57bf
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
17327
diff
changeset
|
1547 |
g1_policy()->print_detailed_heap_transition(true /* full */); |
16993
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1548 |
} |
12935
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
1549 |
|
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
1550 |
print_heap_after_gc(); |
18025 | 1551 |
trace_heap_after_gc(gc_tracer); |
1552 |
||
1553 |
post_full_gc_dump(gc_timer); |
|
1554 |
||
1555 |
gc_timer->register_gc_end(os::elapsed_counter()); |
|
1556 |
gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
|
16993
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
1557 |
} |
7398 | 1558 |
|
1559 |
return true; |
|
1374 | 1560 |
} |
1561 |
||
1562 |
void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { |
|
7398 | 1563 |
// do_collection() will return whether it succeeded in performing |
1564 |
// the GC. Currently, there is no facility on the |
|
1565 |
// do_full_collection() API to notify the caller than the collection |
|
1566 |
// did not succeed (e.g., because it was locked out by the GC |
|
1567 |
// locker). So, right now, we'll ignore the return value. |
|
1568 |
bool dummy = do_collection(true, /* explicit_gc */ |
|
1569 |
clear_all_soft_refs, |
|
1570 |
0 /* word_size */); |
|
1374 | 1571 |
} |
1572 |
||
1573 |
// This code is mostly copied from TenuredGeneration. |
|
1574 |
void |
|
1575 |
G1CollectedHeap:: |
|
1576 |
resize_if_necessary_after_full_collection(size_t word_size) { |
|
1577 |
assert(MinHeapFreeRatio <= MaxHeapFreeRatio, "sanity check"); |
|
1578 |
||
1579 |
// Include the current allocation, if any, and bytes that will be |
|
1580 |
// pre-allocated to support collections, as "used". |
|
1581 |
const size_t used_after_gc = used(); |
|
1582 |
const size_t capacity_after_gc = capacity(); |
|
1583 |
const size_t free_after_gc = capacity_after_gc - used_after_gc; |
|
1584 |
||
6259
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|
1585 |
// This is enforced in arguments.cpp. |
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|
1586 |
assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
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|
1587 |
"otherwise the code below doesn't make sense"); |
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changeset
|
1588 |
|
1374 | 1589 |
// We don't have floating point command-line arguments |
6259
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|
1590 |
const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
1374 | 1591 |
const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
6259
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|
1592 |
const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
1374 | 1593 |
const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
1594 |
||
6259
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|
1595 |
const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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|
1596 |
const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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|
1597 |
|
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|
1598 |
// We have to be careful here as these two calculations can overflow |
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|
1599 |
// 32-bit size_t's. |
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|
1600 |
double used_after_gc_d = (double) used_after_gc; |
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|
1601 |
double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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|
1602 |
double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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|
1603 |
|
81aec0585307
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changeset
|
1604 |
// Let's make sure that they are both under the max heap size, which |
81aec0585307
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|
1605 |
// by default will make them fit into a size_t. |
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|
1606 |
double desired_capacity_upper_bound = (double) max_heap_size; |
81aec0585307
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|
1607 |
minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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|
1608 |
desired_capacity_upper_bound); |
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|
1609 |
maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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|
1610 |
desired_capacity_upper_bound); |
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changeset
|
1611 |
|
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diff
changeset
|
1612 |
// We can now safely turn them into size_t's. |
81aec0585307
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changeset
|
1613 |
size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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|
1614 |
size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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changeset
|
1615 |
|
81aec0585307
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diff
changeset
|
1616 |
// This assert only makes sense here, before we adjust them |
81aec0585307
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diff
changeset
|
1617 |
// with respect to the min and max heap size. |
81aec0585307
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diff
changeset
|
1618 |
assert(minimum_desired_capacity <= maximum_desired_capacity, |
81aec0585307
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diff
changeset
|
1619 |
err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
81aec0585307
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
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diff
changeset
|
1620 |
"maximum_desired_capacity = "SIZE_FORMAT, |
81aec0585307
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diff
changeset
|
1621 |
minimum_desired_capacity, maximum_desired_capacity)); |
81aec0585307
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
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diff
changeset
|
1622 |
|
81aec0585307
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diff
changeset
|
1623 |
// Should not be greater than the heap max size. No need to adjust |
81aec0585307
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parents:
6251
diff
changeset
|
1624 |
// it with respect to the heap min size as it's a lower bound (i.e., |
81aec0585307
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tonyp
parents:
6251
diff
changeset
|
1625 |
// we'll try to make the capacity larger than it, not smaller). |
81aec0585307
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changeset
|
1626 |
minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
81aec0585307
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
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diff
changeset
|
1627 |
// Should not be less than the heap min size. No need to adjust it |
81aec0585307
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tonyp
parents:
6251
diff
changeset
|
1628 |
// with respect to the heap max size as it's an upper bound (i.e., |
81aec0585307
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
6251
diff
changeset
|
1629 |
// we'll try to make the capacity smaller than it, not greater). |
81aec0585307
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
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parents:
6251
diff
changeset
|
1630 |
maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
1374 | 1631 |
|
6259
81aec0585307
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
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parents:
6251
diff
changeset
|
1632 |
if (capacity_after_gc < minimum_desired_capacity) { |
1374 | 1633 |
// Don't expand unless it's significant |
1634 |
size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; |
|
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1635 |
ergo_verbose4(ErgoHeapSizing, |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1636 |
"attempt heap expansion", |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1637 |
ergo_format_reason("capacity lower than " |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1638 |
"min desired capacity after Full GC") |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1639 |
ergo_format_byte("capacity") |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1640 |
ergo_format_byte("occupancy") |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1641 |
ergo_format_byte_perc("min desired capacity"), |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1642 |
capacity_after_gc, used_after_gc, |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1643 |
minimum_desired_capacity, (double) MinHeapFreeRatio); |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1644 |
expand(expand_bytes); |
1374 | 1645 |
|
1646 |
// No expansion, now see if we want to shrink |
|
6259
81aec0585307
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
parents:
6251
diff
changeset
|
1647 |
} else if (capacity_after_gc > maximum_desired_capacity) { |
1374 | 1648 |
// Capacity too large, compute shrinking size |
1649 |
size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; |
|
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1650 |
ergo_verbose4(ErgoHeapSizing, |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1651 |
"attempt heap shrinking", |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1652 |
ergo_format_reason("capacity higher than " |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1653 |
"max desired capacity after Full GC") |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1654 |
ergo_format_byte("capacity") |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1655 |
ergo_format_byte("occupancy") |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1656 |
ergo_format_byte_perc("max desired capacity"), |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1657 |
capacity_after_gc, used_after_gc, |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1658 |
maximum_desired_capacity, (double) MaxHeapFreeRatio); |
1374 | 1659 |
shrink(shrink_bytes); |
1660 |
} |
|
1661 |
} |
|
1662 |
||
1663 |
||
1664 |
HeapWord* |
|
7398 | 1665 |
G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
1666 |
bool* succeeded) { |
|
7923 | 1667 |
assert_at_safepoint(true /* should_be_vm_thread */); |
7398 | 1668 |
|
1669 |
*succeeded = true; |
|
1670 |
// Let's attempt the allocation first. |
|
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1671 |
HeapWord* result = |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1672 |
attempt_allocation_at_safepoint(word_size, |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1673 |
false /* expect_null_mutator_alloc_region */); |
7398 | 1674 |
if (result != NULL) { |
1675 |
assert(*succeeded, "sanity"); |
|
1676 |
return result; |
|
1677 |
} |
|
1374 | 1678 |
|
1679 |
// In a G1 heap, we're supposed to keep allocation from failing by |
|
1680 |
// incremental pauses. Therefore, at least for now, we'll favor |
|
1681 |
// expansion over collection. (This might change in the future if we can |
|
1682 |
// do something smarter than full collection to satisfy a failed alloc.) |
|
1683 |
result = expand_and_allocate(word_size); |
|
1684 |
if (result != NULL) { |
|
7398 | 1685 |
assert(*succeeded, "sanity"); |
1374 | 1686 |
return result; |
1687 |
} |
|
1688 |
||
7398 | 1689 |
// Expansion didn't work, we'll try to do a Full GC. |
1690 |
bool gc_succeeded = do_collection(false, /* explicit_gc */ |
|
1691 |
false, /* clear_all_soft_refs */ |
|
1692 |
word_size); |
|
1693 |
if (!gc_succeeded) { |
|
1694 |
*succeeded = false; |
|
1695 |
return NULL; |
|
1696 |
} |
|
1697 |
||
1698 |
// Retry the allocation |
|
1699 |
result = attempt_allocation_at_safepoint(word_size, |
|
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1700 |
true /* expect_null_mutator_alloc_region */); |
1374 | 1701 |
if (result != NULL) { |
7398 | 1702 |
assert(*succeeded, "sanity"); |
1374 | 1703 |
return result; |
1704 |
} |
|
1705 |
||
7398 | 1706 |
// Then, try a Full GC that will collect all soft references. |
1707 |
gc_succeeded = do_collection(false, /* explicit_gc */ |
|
1708 |
true, /* clear_all_soft_refs */ |
|
1709 |
word_size); |
|
1710 |
if (!gc_succeeded) { |
|
1711 |
*succeeded = false; |
|
1712 |
return NULL; |
|
1713 |
} |
|
1714 |
||
1715 |
// Retry the allocation once more |
|
1716 |
result = attempt_allocation_at_safepoint(word_size, |
|
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1717 |
true /* expect_null_mutator_alloc_region */); |
1374 | 1718 |
if (result != NULL) { |
7398 | 1719 |
assert(*succeeded, "sanity"); |
1374 | 1720 |
return result; |
1721 |
} |
|
1722 |
||
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5244
diff
changeset
|
1723 |
assert(!collector_policy()->should_clear_all_soft_refs(), |
7398 | 1724 |
"Flag should have been handled and cleared prior to this point"); |
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
5244
diff
changeset
|
1725 |
|
1374 | 1726 |
// What else? We might try synchronous finalization later. If the total |
1727 |
// space available is large enough for the allocation, then a more |
|
1728 |
// complete compaction phase than we've tried so far might be |
|
1729 |
// appropriate. |
|
7398 | 1730 |
assert(*succeeded, "sanity"); |
1374 | 1731 |
return NULL; |
1732 |
} |
|
1733 |
||
1734 |
// Attempting to expand the heap sufficiently |
|
1735 |
// to support an allocation of the given "word_size". If |
|
1736 |
// successful, perform the allocation and return the address of the |
|
1737 |
// allocated block, or else "NULL". |
|
1738 |
||
1739 |
HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { |
|
7923 | 1740 |
assert_at_safepoint(true /* should_be_vm_thread */); |
1741 |
||
1742 |
verify_region_sets_optional(); |
|
7398 | 1743 |
|
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1744 |
size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1745 |
ergo_verbose1(ErgoHeapSizing, |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1746 |
"attempt heap expansion", |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1747 |
ergo_format_reason("allocation request failed") |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1748 |
ergo_format_byte("allocation request"), |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1749 |
word_size * HeapWordSize); |
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1750 |
if (expand(expand_bytes)) { |
9989 | 1751 |
_hrs.verify_optional(); |
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1752 |
verify_region_sets_optional(); |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1753 |
return attempt_allocation_at_safepoint(word_size, |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
1754 |
false /* expect_null_mutator_alloc_region */); |
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1755 |
} |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1756 |
return NULL; |
1374 | 1757 |
} |
1758 |
||
9989 | 1759 |
void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
1760 |
HeapWord* new_end) { |
|
1761 |
assert(old_end != new_end, "don't call this otherwise"); |
|
1762 |
assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); |
|
1763 |
||
1764 |
// Update the committed mem region. |
|
1765 |
_g1_committed.set_end(new_end); |
|
1766 |
// Tell the card table about the update. |
|
1767 |
Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); |
|
1768 |
// Tell the BOT about the update. |
|
1769 |
_bot_shared->resize(_g1_committed.word_size()); |
|
17327
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
1770 |
// Tell the hot card cache about the update |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
1771 |
_cg1r->hot_card_cache()->resize_card_counts(capacity()); |
9989 | 1772 |
} |
1773 |
||
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1774 |
bool G1CollectedHeap::expand(size_t expand_bytes) { |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1775 |
size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
1374 | 1776 |
aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
1777 |
HeapRegion::GrainBytes); |
|
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1778 |
ergo_verbose2(ErgoHeapSizing, |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1779 |
"expand the heap", |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1780 |
ergo_format_byte("requested expansion amount") |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1781 |
ergo_format_byte("attempted expansion amount"), |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1782 |
expand_bytes, aligned_expand_bytes); |
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1783 |
|
20311
7db0b4ad8981
8025605: G1: Heap expansion logging misleading for fully expanded heap
brutisso
parents:
20309
diff
changeset
|
1784 |
if (_g1_storage.uncommitted_size() == 0) { |
7db0b4ad8981
8025605: G1: Heap expansion logging misleading for fully expanded heap
brutisso
parents:
20309
diff
changeset
|
1785 |
ergo_verbose0(ErgoHeapSizing, |
7db0b4ad8981
8025605: G1: Heap expansion logging misleading for fully expanded heap
brutisso
parents:
20309
diff
changeset
|
1786 |
"did not expand the heap", |
7db0b4ad8981
8025605: G1: Heap expansion logging misleading for fully expanded heap
brutisso
parents:
20309
diff
changeset
|
1787 |
ergo_format_reason("heap already fully expanded")); |
7db0b4ad8981
8025605: G1: Heap expansion logging misleading for fully expanded heap
brutisso
parents:
20309
diff
changeset
|
1788 |
return false; |
7db0b4ad8981
8025605: G1: Heap expansion logging misleading for fully expanded heap
brutisso
parents:
20309
diff
changeset
|
1789 |
} |
7db0b4ad8981
8025605: G1: Heap expansion logging misleading for fully expanded heap
brutisso
parents:
20309
diff
changeset
|
1790 |
|
9989 | 1791 |
// First commit the memory. |
1792 |
HeapWord* old_end = (HeapWord*) _g1_storage.high(); |
|
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1793 |
bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1794 |
if (successful) { |
9989 | 1795 |
// Then propagate this update to the necessary data structures. |
1796 |
HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
|
1797 |
update_committed_space(old_end, new_end); |
|
1798 |
||
1799 |
FreeRegionList expansion_list("Local Expansion List"); |
|
1800 |
MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); |
|
1801 |
assert(mr.start() == old_end, "post-condition"); |
|
1802 |
// mr might be a smaller region than what was requested if |
|
1803 |
// expand_by() was unable to allocate the HeapRegion instances |
|
1804 |
assert(mr.end() <= new_end, "post-condition"); |
|
1805 |
||
1806 |
size_t actual_expand_bytes = mr.byte_size(); |
|
1807 |
assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); |
|
1808 |
assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), |
|
1809 |
"post-condition"); |
|
1810 |
if (actual_expand_bytes < aligned_expand_bytes) { |
|
1811 |
// We could not expand _hrs to the desired size. In this case we |
|
1812 |
// need to shrink the committed space accordingly. |
|
1813 |
assert(mr.end() < new_end, "invariant"); |
|
1814 |
||
1815 |
size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; |
|
1816 |
// First uncommit the memory. |
|
1817 |
_g1_storage.shrink_by(diff_bytes); |
|
1818 |
// Then propagate this update to the necessary data structures. |
|
1819 |
update_committed_space(new_end, mr.end()); |
|
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1820 |
} |
9989 | 1821 |
_free_list.add_as_tail(&expansion_list); |
10001
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1822 |
|
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1823 |
if (_hr_printer.is_active()) { |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1824 |
HeapWord* curr = mr.start(); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1825 |
while (curr < mr.end()) { |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1826 |
HeapWord* curr_end = curr + HeapRegion::GrainWords; |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1827 |
_hr_printer.commit(curr, curr_end); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1828 |
curr = curr_end; |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1829 |
} |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1830 |
assert(curr == mr.end(), "post-condition"); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1831 |
} |
10529
9d5bbffbb322
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
10528
diff
changeset
|
1832 |
g1_policy()->record_new_heap_size(n_regions()); |
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1833 |
} else { |
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1834 |
ergo_verbose0(ErgoHeapSizing, |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1835 |
"did not expand the heap", |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1836 |
ergo_format_reason("heap expansion operation failed")); |
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1837 |
// The expansion of the virtual storage space was unsuccessful. |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1838 |
// Let's see if it was because we ran out of swap. |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1839 |
if (G1ExitOnExpansionFailure && |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1840 |
_g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1841 |
// We had head room... |
17087
f0b76c4c93a0
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
16994
diff
changeset
|
1842 |
vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
1374 | 1843 |
} |
1844 |
} |
|
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
1845 |
return successful; |
1374 | 1846 |
} |
1847 |
||
9989 | 1848 |
void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
1374 | 1849 |
size_t aligned_shrink_bytes = |
1850 |
ReservedSpace::page_align_size_down(shrink_bytes); |
|
1851 |
aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, |
|
1852 |
HeapRegion::GrainBytes); |
|
17323
cc153b745ed5
8013872: G1: HeapRegionSeq::shrink_by() has invalid assert
brutisso
parents:
17119
diff
changeset
|
1853 |
uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
cc153b745ed5
8013872: G1: HeapRegionSeq::shrink_by() has invalid assert
brutisso
parents:
17119
diff
changeset
|
1854 |
|
cc153b745ed5
8013872: G1: HeapRegionSeq::shrink_by() has invalid assert
brutisso
parents:
17119
diff
changeset
|
1855 |
uint num_regions_removed = _hrs.shrink_by(num_regions_to_remove); |
9989 | 1856 |
HeapWord* old_end = (HeapWord*) _g1_storage.high(); |
17323
cc153b745ed5
8013872: G1: HeapRegionSeq::shrink_by() has invalid assert
brutisso
parents:
17119
diff
changeset
|
1857 |
size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1858 |
|
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1859 |
ergo_verbose3(ErgoHeapSizing, |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1860 |
"shrink the heap", |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1861 |
ergo_format_byte("requested shrinking amount") |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1862 |
ergo_format_byte("aligned shrinking amount") |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1863 |
ergo_format_byte("attempted shrinking amount"), |
17323
cc153b745ed5
8013872: G1: HeapRegionSeq::shrink_by() has invalid assert
brutisso
parents:
17119
diff
changeset
|
1864 |
shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
cc153b745ed5
8013872: G1: HeapRegionSeq::shrink_by() has invalid assert
brutisso
parents:
17119
diff
changeset
|
1865 |
if (num_regions_removed > 0) { |
cc153b745ed5
8013872: G1: HeapRegionSeq::shrink_by() has invalid assert
brutisso
parents:
17119
diff
changeset
|
1866 |
_g1_storage.shrink_by(shrunk_bytes); |
cc153b745ed5
8013872: G1: HeapRegionSeq::shrink_by() has invalid assert
brutisso
parents:
17119
diff
changeset
|
1867 |
HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
cc153b745ed5
8013872: G1: HeapRegionSeq::shrink_by() has invalid assert
brutisso
parents:
17119
diff
changeset
|
1868 |
|
10001
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1869 |
if (_hr_printer.is_active()) { |
17323
cc153b745ed5
8013872: G1: HeapRegionSeq::shrink_by() has invalid assert
brutisso
parents:
17119
diff
changeset
|
1870 |
HeapWord* curr = old_end; |
cc153b745ed5
8013872: G1: HeapRegionSeq::shrink_by() has invalid assert
brutisso
parents:
17119
diff
changeset
|
1871 |
while (curr > new_end) { |
10001
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1872 |
HeapWord* curr_end = curr; |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1873 |
curr -= HeapRegion::GrainWords; |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1874 |
_hr_printer.uncommit(curr, curr_end); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1875 |
} |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1876 |
} |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1877 |
|
17323
cc153b745ed5
8013872: G1: HeapRegionSeq::shrink_by() has invalid assert
brutisso
parents:
17119
diff
changeset
|
1878 |
_expansion_regions += num_regions_removed; |
9989 | 1879 |
update_committed_space(old_end, new_end); |
1880 |
HeapRegionRemSet::shrink_heap(n_regions()); |
|
10529
9d5bbffbb322
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
10528
diff
changeset
|
1881 |
g1_policy()->record_new_heap_size(n_regions()); |
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1882 |
} else { |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1883 |
ergo_verbose0(ErgoHeapSizing, |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1884 |
"did not shrink the heap", |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10495
diff
changeset
|
1885 |
ergo_format_reason("heap shrinking operation failed")); |
1374 | 1886 |
} |
1887 |
} |
|
1888 |
||
1889 |
void G1CollectedHeap::shrink(size_t shrink_bytes) { |
|
7923 | 1890 |
verify_region_sets_optional(); |
1891 |
||
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
1892 |
// We should only reach here at the end of a Full GC which means we |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
1893 |
// should not not be holding to any GC alloc regions. The method |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
1894 |
// below will make sure of that and do any remaining clean up. |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
1895 |
abandon_gc_alloc_regions(); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
1896 |
|
7923 | 1897 |
// Instead of tearing down / rebuilding the free lists here, we |
1898 |
// could instead use the remove_all_pending() method on free_list to |
|
1899 |
// remove only the ones that we need to remove. |
|
10996 | 1900 |
tear_down_region_sets(true /* free_list_only */); |
1374 | 1901 |
shrink_helper(shrink_bytes); |
10996 | 1902 |
rebuild_region_sets(true /* free_list_only */); |
7923 | 1903 |
|
9989 | 1904 |
_hrs.verify_optional(); |
7923 | 1905 |
verify_region_sets_optional(); |
1374 | 1906 |
} |
1907 |
||
1908 |
// Public methods. |
|
1909 |
||
1910 |
#ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away |
|
1911 |
#pragma warning( disable:4355 ) // 'this' : used in base member initializer list |
|
1912 |
#endif // _MSC_VER |
|
1913 |
||
1914 |
||
1915 |
G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : |
|
1916 |
SharedHeap(policy_), |
|
1917 |
_g1_policy(policy_), |
|
4481 | 1918 |
_dirty_card_queue_set(false), |
6247 | 1919 |
_into_cset_dirty_card_queue_set(false), |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
1920 |
_is_alive_closure_cm(this), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
1921 |
_is_alive_closure_stw(this), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
1922 |
_ref_processor_cm(NULL), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
1923 |
_ref_processor_stw(NULL), |
1374 | 1924 |
_process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
1925 |
_bot_shared(NULL), |
|
18025 | 1926 |
_evac_failure_scan_stack(NULL), |
1374 | 1927 |
_mark_in_progress(false), |
7923 | 1928 |
_cg1r(NULL), _summary_bytes_used(0), |
10671
431ff8629f97
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
10670
diff
changeset
|
1929 |
_g1mm(NULL), |
1374 | 1930 |
_refine_cte_cl(NULL), |
1931 |
_full_collection(false), |
|
7923 | 1932 |
_free_list("Master Free List"), |
1933 |
_secondary_free_list("Secondary Free List"), |
|
10996 | 1934 |
_old_set("Old Set"), |
7923 | 1935 |
_humongous_set("Master Humongous Set"), |
1936 |
_free_regions_coming(false), |
|
1374 | 1937 |
_young_list(new YoungList(this)), |
1938 |
_gc_time_stamp(0), |
|
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
1939 |
_retained_old_gc_alloc_region(NULL), |
13466 | 1940 |
_survivor_plab_stats(YoungPLABSize, PLABWeight), |
1941 |
_old_plab_stats(OldPLABSize, PLABWeight), |
|
11449
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
1942 |
_expand_heap_after_alloc_failure(true), |
1902 | 1943 |
_surviving_young_words(NULL), |
12934
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
1944 |
_old_marking_cycles_started(0), |
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
1945 |
_old_marking_cycles_completed(0), |
18025 | 1946 |
_concurrent_cycle_started(false), |
1902 | 1947 |
_in_cset_fast_test(NULL), |
2883
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
1948 |
_in_cset_fast_test_base(NULL), |
11248
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
1949 |
_dirty_cards_region_list(NULL), |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
1950 |
_worker_cset_start_region(NULL), |
18025 | 1951 |
_worker_cset_start_region_time_stamp(NULL), |
1952 |
_gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), |
|
1953 |
_gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), |
|
1954 |
_gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), |
|
1955 |
_gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { |
|
1956 |
||
1957 |
_g1h = this; |
|
1374 | 1958 |
if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
1959 |
vm_exit_during_initialization("Failed necessary allocation."); |
|
1960 |
} |
|
3697
ea9211aa02f5
6819085: G1: use larger and/or user settable region size
tonyp
parents:
3696
diff
changeset
|
1961 |
|
ea9211aa02f5
6819085: G1: use larger and/or user settable region size
tonyp
parents:
3696
diff
changeset
|
1962 |
_humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
ea9211aa02f5
6819085: G1: use larger and/or user settable region size
tonyp
parents:
3696
diff
changeset
|
1963 |
|
1374 | 1964 |
int n_queues = MAX2((int)ParallelGCThreads, 1); |
1965 |
_task_queues = new RefToScanQueueSet(n_queues); |
|
1966 |
||
1967 |
int n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
|
1968 |
assert(n_rem_sets > 0, "Invariant."); |
|
1969 |
||
13195 | 1970 |
_worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
1971 |
_worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); |
|
18025 | 1972 |
_evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
11248
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
1973 |
|
1374 | 1974 |
for (int i = 0; i < n_queues; i++) { |
1975 |
RefToScanQueue* q = new RefToScanQueue(); |
|
1976 |
q->initialize(); |
|
1977 |
_task_queues->register_queue(i, q); |
|
18025 | 1978 |
::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
1979 |
} |
|
11248
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
1980 |
clear_cset_start_regions(); |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
1981 |
|
13517
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
1982 |
// Initialize the G1EvacuationFailureALot counters and flags. |
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
1983 |
NOT_PRODUCT(reset_evacuation_should_fail();) |
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
1984 |
|
1374 | 1985 |
guarantee(_task_queues != NULL, "task_queues allocation failure."); |
1986 |
} |
|
1987 |
||
1988 |
jint G1CollectedHeap::initialize() { |
|
4637 | 1989 |
CollectedHeap::pre_initialize(); |
1374 | 1990 |
os::enable_vtime(); |
1991 |
||
12378
ed44b9ecfa2f
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
12271
diff
changeset
|
1992 |
G1Log::init(); |
ed44b9ecfa2f
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
12271
diff
changeset
|
1993 |
|
1374 | 1994 |
// Necessary to satisfy locking discipline assertions. |
1995 |
||
1996 |
MutexLocker x(Heap_lock); |
|
1997 |
||
10001
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1998 |
// We have to initialize the printer before committing the heap, as |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
1999 |
// it will be used then. |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
2000 |
_hr_printer.set_active(G1PrintHeapRegions); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
2001 |
|
1374 | 2002 |
// While there are no constraints in the GC code that HeapWordSize |
2003 |
// be any particular value, there are multiple other areas in the |
|
2004 |
// system which believe this to be true (e.g. oop->object_size in some |
|
2005 |
// cases incorrectly returns the size in wordSize units rather than |
|
2006 |
// HeapWordSize). |
|
2007 |
guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); |
|
2008 |
||
2009 |
size_t init_byte_size = collector_policy()->initial_heap_byte_size(); |
|
2010 |
size_t max_byte_size = collector_policy()->max_heap_byte_size(); |
|
19546
f6b7c9e96ea3
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
19341
diff
changeset
|
2011 |
size_t heap_alignment = collector_policy()->max_alignment(); |
1374 | 2012 |
|
2013 |
// Ensure that the sizes are properly aligned. |
|
2014 |
Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); |
|
2015 |
Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); |
|
19546
f6b7c9e96ea3
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
19341
diff
changeset
|
2016 |
Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
1374 | 2017 |
|
17327
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
2018 |
_cg1r = new ConcurrentG1Refine(this); |
1374 | 2019 |
|
2020 |
// Reserve the maximum. |
|
2254
f13dda645a4b
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
2146
diff
changeset
|
2021 |
|
10237
df347ffafa0d
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
10236
diff
changeset
|
2022 |
// When compressed oops are enabled, the preferred heap base |
df347ffafa0d
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
10236
diff
changeset
|
2023 |
// is calculated by subtracting the requested size from the |
df347ffafa0d
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
10236
diff
changeset
|
2024 |
// 32Gb boundary and using the result as the base address for |
df347ffafa0d
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
10236
diff
changeset
|
2025 |
// heap reservation. If the requested size is not aligned to |
df347ffafa0d
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
10236
diff
changeset
|
2026 |
// HeapRegion::GrainBytes (i.e. the alignment that is passed |
df347ffafa0d
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
10236
diff
changeset
|
2027 |
// into the ReservedHeapSpace constructor) then the actual |
df347ffafa0d
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
10236
diff
changeset
|
2028 |
// base of the reserved heap may end up differing from the |
df347ffafa0d
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
10236
diff
changeset
|
2029 |
// address that was requested (i.e. the preferred heap base). |
df347ffafa0d
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
10236
diff
changeset
|
2030 |
// If this happens then we could end up using a non-optimal |
df347ffafa0d
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
10236
diff
changeset
|
2031 |
// compressed oops mode. |
df347ffafa0d
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
10236
diff
changeset
|
2032 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
2033 |
ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
19546
f6b7c9e96ea3
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
19341
diff
changeset
|
2034 |
heap_alignment); |
1374 | 2035 |
|
2036 |
// It is important to do this in a way such that concurrent readers can't |
|
18025 | 2037 |
// temporarily think something is in the heap. (I've actually seen this |
1374 | 2038 |
// happen in asserts: DLD.) |
2039 |
_reserved.set_word_size(0); |
|
2040 |
_reserved.set_start((HeapWord*)heap_rs.base()); |
|
2041 |
_reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); |
|
2042 |
||
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2043 |
_expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
1374 | 2044 |
|
2045 |
// Create the gen rem set (and barrier set) for the entire reserved region. |
|
2046 |
_rem_set = collector_policy()->create_rem_set(_reserved, 2); |
|
2047 |
set_barrier_set(rem_set()->bs()); |
|
20309 | 2048 |
if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
2049 |
vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); |
|
1374 | 2050 |
return JNI_ENOMEM; |
2051 |
} |
|
2052 |
||
2053 |
// Also create a G1 rem set. |
|
20309 | 2054 |
_g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
1374 | 2055 |
|
2056 |
// Carve out the G1 part of the heap. |
|
2057 |
||
2058 |
ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); |
|
2059 |
_g1_reserved = MemRegion((HeapWord*)g1_rs.base(), |
|
2060 |
g1_rs.size()/HeapWordSize); |
|
2061 |
||
2062 |
_g1_storage.initialize(g1_rs, 0); |
|
2063 |
_g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); |
|
9989 | 2064 |
_hrs.initialize((HeapWord*) _g1_reserved.start(), |
20083
df032615dd00
7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
parents:
19986
diff
changeset
|
2065 |
(HeapWord*) _g1_reserved.end()); |
df032615dd00
7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
parents:
19986
diff
changeset
|
2066 |
assert(_hrs.max_length() == _expansion_regions, |
df032615dd00
7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
parents:
19986
diff
changeset
|
2067 |
err_msg("max length: %u expansion regions: %u", |
df032615dd00
7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
parents:
19986
diff
changeset
|
2068 |
_hrs.max_length(), _expansion_regions)); |
1374 | 2069 |
|
17327
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
2070 |
// Do later initialization work for concurrent refinement. |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
2071 |
_cg1r->init(); |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
2072 |
|
2996
1097030e5ec3
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
2883
diff
changeset
|
2073 |
// 6843694 - ensure that the maximum region index can fit |
1097030e5ec3
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
2883
diff
changeset
|
2074 |
// in the remembered set structures. |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2075 |
const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
2996
1097030e5ec3
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
2883
diff
changeset
|
2076 |
guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
1097030e5ec3
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
2883
diff
changeset
|
2077 |
|
1097030e5ec3
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
2883
diff
changeset
|
2078 |
size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
3697
ea9211aa02f5
6819085: G1: use larger and/or user settable region size
tonyp
parents:
3696
diff
changeset
|
2079 |
guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
10677
370a8da2d63f
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
10674
diff
changeset
|
2080 |
guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
3697
ea9211aa02f5
6819085: G1: use larger and/or user settable region size
tonyp
parents:
3696
diff
changeset
|
2081 |
"too many cards per region"); |
2996
1097030e5ec3
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
2883
diff
changeset
|
2082 |
|
7923 | 2083 |
HeapRegionSet::set_unrealistically_long_length(max_regions() + 1); |
2084 |
||
1374 | 2085 |
_bot_shared = new G1BlockOffsetSharedArray(_reserved, |
2086 |
heap_word_size(init_byte_size)); |
|
2087 |
||
2088 |
_g1h = this; |
|
2089 |
||
17327
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
2090 |
_in_cset_fast_test_length = max_regions(); |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
2091 |
_in_cset_fast_test_base = |
13195 | 2092 |
NEW_C_HEAP_ARRAY(bool, (size_t) _in_cset_fast_test_length, mtGC); |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
2093 |
|
17327
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
2094 |
// We're biasing _in_cset_fast_test to avoid subtracting the |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
2095 |
// beginning of the heap every time we want to index; basically |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
2096 |
// it's the same with what we do with the card table. |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
2097 |
_in_cset_fast_test = _in_cset_fast_test_base - |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2098 |
((uintx) _g1_reserved.start() >> HeapRegion::LogOfHRGrainBytes); |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
2099 |
|
17327
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
2100 |
// Clear the _cset_fast_test bitmap in anticipation of adding |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
2101 |
// regions to the incremental collection set for the first |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
2102 |
// evacuation pause. |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
2103 |
clear_cset_fast_test(); |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
2104 |
|
1374 | 2105 |
// Create the ConcurrentMark data structure and thread. |
2106 |
// (Must do this late, so that "max_regions" is defined.) |
|
14740
1431ef92fed1
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
14634
diff
changeset
|
2107 |
_cm = new ConcurrentMark(this, heap_rs); |
1431ef92fed1
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
14634
diff
changeset
|
2108 |
if (_cm == NULL || !_cm->completed_initialization()) { |
1431ef92fed1
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
14634
diff
changeset
|
2109 |
vm_shutdown_during_initialization("Could not create/initialize ConcurrentMark"); |
1431ef92fed1
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
14634
diff
changeset
|
2110 |
return JNI_ENOMEM; |
1431ef92fed1
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
14634
diff
changeset
|
2111 |
} |
1374 | 2112 |
_cmThread = _cm->cmThread(); |
2113 |
||
2114 |
// Initialize the from_card cache structure of HeapRegionRemSet. |
|
2115 |
HeapRegionRemSet::init_heap(max_regions()); |
|
2116 |
||
2344 | 2117 |
// Now expand into the initial heap size. |
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
2118 |
if (!expand(init_byte_size)) { |
14740
1431ef92fed1
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
14634
diff
changeset
|
2119 |
vm_shutdown_during_initialization("Failed to allocate initial heap."); |
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
2120 |
return JNI_ENOMEM; |
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
2121 |
} |
1374 | 2122 |
|
2123 |
// Perform any initialization actions delegated to the policy. |
|
2124 |
g1_policy()->init(); |
|
2125 |
||
2126 |
_refine_cte_cl = |
|
2127 |
new RefineCardTableEntryClosure(ConcurrentG1RefineThread::sts(), |
|
2128 |
g1_rem_set(), |
|
2129 |
concurrent_g1_refine()); |
|
2130 |
JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); |
|
2131 |
||
2132 |
JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, |
|
2133 |
SATB_Q_FL_lock, |
|
4481 | 2134 |
G1SATBProcessCompletedThreshold, |
1374 | 2135 |
Shared_SATB_Q_lock); |
2881 | 2136 |
|
2137 |
JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
|
2138 |
DirtyCardQ_FL_lock, |
|
4481 | 2139 |
concurrent_g1_refine()->yellow_zone(), |
2140 |
concurrent_g1_refine()->red_zone(), |
|
2881 | 2141 |
Shared_DirtyCardQ_lock); |
2142 |
||
2142
032f4652700c
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
2121
diff
changeset
|
2143 |
if (G1DeferredRSUpdate) { |
032f4652700c
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
2121
diff
changeset
|
2144 |
dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
032f4652700c
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
2121
diff
changeset
|
2145 |
DirtyCardQ_FL_lock, |
4481 | 2146 |
-1, // never trigger processing |
2147 |
-1, // no limit on length |
|
2142
032f4652700c
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
2121
diff
changeset
|
2148 |
Shared_DirtyCardQ_lock, |
032f4652700c
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
2121
diff
changeset
|
2149 |
&JavaThread::dirty_card_queue_set()); |
032f4652700c
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
2121
diff
changeset
|
2150 |
} |
6247 | 2151 |
|
2152 |
// Initialize the card queue set used to hold cards containing |
|
2153 |
// references into the collection set. |
|
2154 |
_into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, |
|
2155 |
DirtyCardQ_FL_lock, |
|
2156 |
-1, // never trigger processing |
|
2157 |
-1, // no limit on length |
|
2158 |
Shared_DirtyCardQ_lock, |
|
2159 |
&JavaThread::dirty_card_queue_set()); |
|
2160 |
||
1374 | 2161 |
// In case we're keeping closure specialization stats, initialize those |
2162 |
// counts and that mechanism. |
|
2163 |
SpecializationStats::clear(); |
|
2164 |
||
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2165 |
// Here we allocate the dummy full region that is required by the |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2166 |
// G1AllocRegion class. If we don't pass an address in the reserved |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2167 |
// space here, lots of asserts fire. |
9989 | 2168 |
|
2169 |
HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, |
|
2170 |
_g1_reserved.start()); |
|
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2171 |
// We'll re-use the same region whether the alloc region will |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2172 |
// require BOT updates or not and, if it doesn't, then a non-young |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2173 |
// region will complain that it cannot support allocations without |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2174 |
// BOT updates. So we'll tag the dummy region as young to avoid that. |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2175 |
dummy_region->set_young(); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2176 |
// Make sure it's full. |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2177 |
dummy_region->set_top(dummy_region->end()); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2178 |
G1AllocRegion::setup(this, dummy_region); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2179 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2180 |
init_mutator_alloc_region(); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2181 |
|
9338
05ee447bd420
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
9334
diff
changeset
|
2182 |
// Do create of the monitoring and management support so that |
05ee447bd420
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
9334
diff
changeset
|
2183 |
// values in the heap have been properly initialized. |
10671
431ff8629f97
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
10670
diff
changeset
|
2184 |
_g1mm = new G1MonitoringSupport(this); |
9338
05ee447bd420
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
9334
diff
changeset
|
2185 |
|
1374 | 2186 |
return JNI_OK; |
2187 |
} |
|
2188 |
||
19986
33d188c66ed9
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
19729
diff
changeset
|
2189 |
size_t G1CollectedHeap::conservative_max_heap_alignment() { |
33d188c66ed9
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
19729
diff
changeset
|
2190 |
return HeapRegion::max_region_size(); |
33d188c66ed9
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
19729
diff
changeset
|
2191 |
} |
33d188c66ed9
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
19729
diff
changeset
|
2192 |
|
1374 | 2193 |
void G1CollectedHeap::ref_processing_init() { |
7399
4ecd771fa2d1
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
7398
diff
changeset
|
2194 |
// Reference processing in G1 currently works as follows: |
4ecd771fa2d1
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
7398
diff
changeset
|
2195 |
// |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2196 |
// * There are two reference processor instances. One is |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2197 |
// used to record and process discovered references |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2198 |
// during concurrent marking; the other is used to |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2199 |
// record and process references during STW pauses |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2200 |
// (both full and incremental). |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2201 |
// * Both ref processors need to 'span' the entire heap as |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2202 |
// the regions in the collection set may be dotted around. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2203 |
// |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2204 |
// * For the concurrent marking ref processor: |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2205 |
// * Reference discovery is enabled at initial marking. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2206 |
// * Reference discovery is disabled and the discovered |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2207 |
// references processed etc during remarking. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2208 |
// * Reference discovery is MT (see below). |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2209 |
// * Reference discovery requires a barrier (see below). |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2210 |
// * Reference processing may or may not be MT |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2211 |
// (depending on the value of ParallelRefProcEnabled |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2212 |
// and ParallelGCThreads). |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2213 |
// * A full GC disables reference discovery by the CM |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2214 |
// ref processor and abandons any entries on it's |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2215 |
// discovered lists. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2216 |
// |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2217 |
// * For the STW processor: |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2218 |
// * Non MT discovery is enabled at the start of a full GC. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2219 |
// * Processing and enqueueing during a full GC is non-MT. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2220 |
// * During a full GC, references are processed after marking. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2221 |
// |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2222 |
// * Discovery (may or may not be MT) is enabled at the start |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2223 |
// of an incremental evacuation pause. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2224 |
// * References are processed near the end of a STW evacuation pause. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2225 |
// * For both types of GC: |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2226 |
// * Discovery is atomic - i.e. not concurrent. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2227 |
// * Reference discovery will not need a barrier. |
7399
4ecd771fa2d1
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
7398
diff
changeset
|
2228 |
|
1374 | 2229 |
SharedHeap::ref_processing_init(); |
2230 |
MemRegion mr = reserved_region(); |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2231 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2232 |
// Concurrent Mark ref processor |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2233 |
_ref_processor_cm = |
8688
493d12ccc6db
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
8680
diff
changeset
|
2234 |
new ReferenceProcessor(mr, // span |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2235 |
ParallelRefProcEnabled && (ParallelGCThreads > 1), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2236 |
// mt processing |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2237 |
(int) ParallelGCThreads, |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2238 |
// degree of mt processing |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2239 |
(ParallelGCThreads > 1) || (ConcGCThreads > 1), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2240 |
// mt discovery |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2241 |
(int) MAX2(ParallelGCThreads, ConcGCThreads), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2242 |
// degree of mt discovery |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2243 |
false, |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2244 |
// Reference discovery is not atomic |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2245 |
&_is_alive_closure_cm, |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2246 |
// is alive closure |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2247 |
// (for efficiency/performance) |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2248 |
true); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2249 |
// Setting next fields of discovered |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2250 |
// lists requires a barrier. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2251 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2252 |
// STW ref processor |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2253 |
_ref_processor_stw = |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2254 |
new ReferenceProcessor(mr, // span |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2255 |
ParallelRefProcEnabled && (ParallelGCThreads > 1), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2256 |
// mt processing |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2257 |
MAX2((int)ParallelGCThreads, 1), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2258 |
// degree of mt processing |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2259 |
(ParallelGCThreads > 1), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2260 |
// mt discovery |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2261 |
MAX2((int)ParallelGCThreads, 1), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2262 |
// degree of mt discovery |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2263 |
true, |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2264 |
// Reference discovery is atomic |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2265 |
&_is_alive_closure_stw, |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2266 |
// is alive closure |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2267 |
// (for efficiency/performance) |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2268 |
false); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2269 |
// Setting next fields of discovered |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
2270 |
// lists requires a barrier. |
1374 | 2271 |
} |
2272 |
||
2273 |
size_t G1CollectedHeap::capacity() const { |
|
2274 |
return _g1_committed.byte_size(); |
|
2275 |
} |
|
2276 |
||
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2277 |
void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
13289
diff
changeset
|
2278 |
assert(!hr->continuesHumongous(), "pre-condition"); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2279 |
hr->reset_gc_time_stamp(); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2280 |
if (hr->startsHumongous()) { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2281 |
uint first_index = hr->hrs_index() + 1; |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
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diff
changeset
|
2282 |
uint last_index = hr->last_hc_index(); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2283 |
for (uint i = first_index; i < last_index; i += 1) { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2284 |
HeapRegion* chr = region_at(i); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2285 |
assert(chr->continuesHumongous(), "sanity"); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2286 |
chr->reset_gc_time_stamp(); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2287 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2288 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2289 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2290 |
|
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2291 |
#ifndef PRODUCT |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
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diff
changeset
|
2292 |
class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2293 |
private: |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2294 |
unsigned _gc_time_stamp; |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2295 |
bool _failures; |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2296 |
|
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2297 |
public: |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2298 |
CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2299 |
_gc_time_stamp(gc_time_stamp), _failures(false) { } |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2300 |
|
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2301 |
virtual bool doHeapRegion(HeapRegion* hr) { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2302 |
unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2303 |
if (_gc_time_stamp != region_gc_time_stamp) { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2304 |
gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2305 |
"expected %d", HR_FORMAT_PARAMS(hr), |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2306 |
region_gc_time_stamp, _gc_time_stamp); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2307 |
_failures = true; |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2308 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2309 |
return false; |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2310 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2311 |
|
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2312 |
bool failures() { return _failures; } |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2313 |
}; |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2314 |
|
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2315 |
void G1CollectedHeap::check_gc_time_stamps() { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2316 |
CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2317 |
heap_region_iterate(&cl); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2318 |
guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2319 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2320 |
#endif // PRODUCT |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2321 |
|
6247 | 2322 |
void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
2323 |
DirtyCardQueue* into_cset_dcq, |
|
2324 |
bool concurrent, |
|
1374 | 2325 |
int worker_i) { |
3589 | 2326 |
// Clean cards in the hot card cache |
17327
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
2327 |
G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
2328 |
hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
3589 | 2329 |
|
1374 | 2330 |
DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
2331 |
int n_completed_buffers = 0; |
|
6247 | 2332 |
while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
1374 | 2333 |
n_completed_buffers++; |
2334 |
} |
|
13516
f7adc27fb367
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
13482
diff
changeset
|
2335 |
g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
1374 | 2336 |
dcqs.clear_n_completed_buffers(); |
2337 |
assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); |
|
2338 |
} |
|
2339 |
||
2340 |
||
2341 |
// Computes the sum of the storage used by the various regions. |
|
2342 |
||
2343 |
size_t G1CollectedHeap::used() const { |
|
3279
1af8fdb08664
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
3278
diff
changeset
|
2344 |
assert(Heap_lock->owner() != NULL, |
1af8fdb08664
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
3278
diff
changeset
|
2345 |
"Should be owned on this thread's behalf."); |
1374 | 2346 |
size_t result = _summary_bytes_used; |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
2347 |
// Read only once in case it is set to NULL concurrently |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2348 |
HeapRegion* hr = _mutator_alloc_region.get(); |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
2349 |
if (hr != NULL) |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
2350 |
result += hr->used(); |
1374 | 2351 |
return result; |
2352 |
} |
|
2353 |
||
3263
23d2d46c6d08
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
3262
diff
changeset
|
2354 |
size_t G1CollectedHeap::used_unlocked() const { |
23d2d46c6d08
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
3262
diff
changeset
|
2355 |
size_t result = _summary_bytes_used; |
23d2d46c6d08
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
3262
diff
changeset
|
2356 |
return result; |
23d2d46c6d08
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
3262
diff
changeset
|
2357 |
} |
23d2d46c6d08
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
3262
diff
changeset
|
2358 |
|
1374 | 2359 |
class SumUsedClosure: public HeapRegionClosure { |
2360 |
size_t _used; |
|
2361 |
public: |
|
2362 |
SumUsedClosure() : _used(0) {} |
|
2363 |
bool doHeapRegion(HeapRegion* r) { |
|
2364 |
if (!r->continuesHumongous()) { |
|
2365 |
_used += r->used(); |
|
2366 |
} |
|
2367 |
return false; |
|
2368 |
} |
|
2369 |
size_t result() { return _used; } |
|
2370 |
}; |
|
2371 |
||
2372 |
size_t G1CollectedHeap::recalculate_used() const { |
|
2373 |
SumUsedClosure blk; |
|
9989 | 2374 |
heap_region_iterate(&blk); |
1374 | 2375 |
return blk.result(); |
2376 |
} |
|
2377 |
||
2378 |
size_t G1CollectedHeap::unsafe_max_alloc() { |
|
7923 | 2379 |
if (free_regions() > 0) return HeapRegion::GrainBytes; |
1374 | 2380 |
// otherwise, is there space in the current allocation region? |
2381 |
||
2382 |
// We need to store the current allocation region in a local variable |
|
2383 |
// here. The problem is that this method doesn't take any locks and |
|
2384 |
// there may be other threads which overwrite the current allocation |
|
2385 |
// region field. attempt_allocation(), for example, sets it to NULL |
|
2386 |
// and this can happen *after* the NULL check here but before the call |
|
2387 |
// to free(), resulting in a SIGSEGV. Note that this doesn't appear |
|
2388 |
// to be a problem in the optimized build, since the two loads of the |
|
2389 |
// current allocation region field are optimized away. |
|
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2390 |
HeapRegion* hr = _mutator_alloc_region.get(); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2391 |
if (hr == NULL) { |
1374 | 2392 |
return 0; |
2393 |
} |
|
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
2394 |
return hr->free(); |
1374 | 2395 |
} |
2396 |
||
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2397 |
bool G1CollectedHeap::should_do_concurrent_full_gc(GCCause::Cause cause) { |
11754
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2398 |
switch (cause) { |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2399 |
case GCCause::_gc_locker: return GCLockerInvokesConcurrent; |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2400 |
case GCCause::_java_lang_system_gc: return ExplicitGCInvokesConcurrent; |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2401 |
case GCCause::_g1_humongous_allocation: return true; |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2402 |
default: return false; |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2403 |
} |
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2404 |
} |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2405 |
|
9334
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2406 |
#ifndef PRODUCT |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2407 |
void G1CollectedHeap::allocate_dummy_regions() { |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2408 |
// Let's fill up most of the region |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2409 |
size_t word_size = HeapRegion::GrainWords - 1024; |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2410 |
// And as a result the region we'll allocate will be humongous. |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2411 |
guarantee(isHumongous(word_size), "sanity"); |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2412 |
|
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2413 |
for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2414 |
// Let's use the existing mechanism for the allocation |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2415 |
HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2416 |
if (dummy_obj != NULL) { |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2417 |
MemRegion mr(dummy_obj, word_size); |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2418 |
CollectedHeap::fill_with_object(mr); |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2419 |
} else { |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2420 |
// If we can't allocate once, we probably cannot allocate |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2421 |
// again. Let's get out of the loop. |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2422 |
break; |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2423 |
} |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2424 |
} |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2425 |
} |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2426 |
#endif // !PRODUCT |
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
2427 |
|
12934
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2428 |
void G1CollectedHeap::increment_old_marking_cycles_started() { |
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2429 |
assert(_old_marking_cycles_started == _old_marking_cycles_completed || |
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2430 |
_old_marking_cycles_started == _old_marking_cycles_completed + 1, |
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2431 |
err_msg("Wrong marking cycle count (started: %d, completed: %d)", |
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2432 |
_old_marking_cycles_started, _old_marking_cycles_completed)); |
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2433 |
|
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2434 |
_old_marking_cycles_started++; |
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2435 |
} |
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2436 |
|
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2437 |
void G1CollectedHeap::increment_old_marking_cycles_completed(bool concurrent) { |
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2438 |
MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2439 |
|
7455
22e19e8c0beb
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
7420
diff
changeset
|
2440 |
// We assume that if concurrent == true, then the caller is a |
22e19e8c0beb
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
7420
diff
changeset
|
2441 |
// concurrent thread that was joined the Suspendible Thread |
22e19e8c0beb
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
7420
diff
changeset
|
2442 |
// Set. If there's ever a cheap way to check this, we should add an |
22e19e8c0beb
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
7420
diff
changeset
|
2443 |
// assert here. |
22e19e8c0beb
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
7420
diff
changeset
|
2444 |
|
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2445 |
// Given that this method is called at the end of a Full GC or of a |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2446 |
// concurrent cycle, and those can be nested (i.e., a Full GC can |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2447 |
// interrupt a concurrent cycle), the number of full collections |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2448 |
// completed should be either one (in the case where there was no |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2449 |
// nesting) or two (when a Full GC interrupted a concurrent cycle) |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2450 |
// behind the number of full collections started. |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2451 |
|
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2452 |
// This is the case for the inner caller, i.e. a Full GC. |
7455
22e19e8c0beb
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
7420
diff
changeset
|
2453 |
assert(concurrent || |
12934
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2454 |
(_old_marking_cycles_started == _old_marking_cycles_completed + 1) || |
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2455 |
(_old_marking_cycles_started == _old_marking_cycles_completed + 2), |
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2456 |
err_msg("for inner caller (Full GC): _old_marking_cycles_started = %u " |
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2457 |
"is inconsistent with _old_marking_cycles_completed = %u", |
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2458 |
_old_marking_cycles_started, _old_marking_cycles_completed)); |
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2459 |
|
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2460 |
// This is the case for the outer caller, i.e. the concurrent cycle. |
7455
22e19e8c0beb
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
7420
diff
changeset
|
2461 |
assert(!concurrent || |
12934
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2462 |
(_old_marking_cycles_started == _old_marking_cycles_completed + 1), |
7455
22e19e8c0beb
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
7420
diff
changeset
|
2463 |
err_msg("for outer caller (concurrent cycle): " |
12934
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2464 |
"_old_marking_cycles_started = %u " |
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2465 |
"is inconsistent with _old_marking_cycles_completed = %u", |
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2466 |
_old_marking_cycles_started, _old_marking_cycles_completed)); |
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2467 |
|
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2468 |
_old_marking_cycles_completed += 1; |
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2469 |
|
6766
839211600ad0
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
6759
diff
changeset
|
2470 |
// We need to clear the "in_progress" flag in the CM thread before |
839211600ad0
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
6759
diff
changeset
|
2471 |
// we wake up any waiters (especially when ExplicitInvokesConcurrent |
839211600ad0
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
6759
diff
changeset
|
2472 |
// is set) so that if a waiter requests another System.gc() it doesn't |
18025 | 2473 |
// incorrectly see that a marking cycle is still in progress. |
7455
22e19e8c0beb
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
7420
diff
changeset
|
2474 |
if (concurrent) { |
6766
839211600ad0
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
6759
diff
changeset
|
2475 |
_cmThread->clear_in_progress(); |
839211600ad0
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
6759
diff
changeset
|
2476 |
} |
839211600ad0
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
6759
diff
changeset
|
2477 |
|
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2478 |
// This notify_all() will ensure that a thread that called |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2479 |
// System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2480 |
// and it's waiting for a full GC to finish will be woken up. It is |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2481 |
// waiting in VM_G1IncCollectionPause::doit_epilogue(). |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2482 |
FullGCCount_lock->notify_all(); |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2483 |
} |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2484 |
|
18025 | 2485 |
void G1CollectedHeap::register_concurrent_cycle_start(jlong start_time) { |
2486 |
_concurrent_cycle_started = true; |
|
2487 |
_gc_timer_cm->register_gc_start(start_time); |
|
2488 |
||
2489 |
_gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); |
|
2490 |
trace_heap_before_gc(_gc_tracer_cm); |
|
2491 |
} |
|
2492 |
||
2493 |
void G1CollectedHeap::register_concurrent_cycle_end() { |
|
2494 |
if (_concurrent_cycle_started) { |
|
2495 |
if (_cm->has_aborted()) { |
|
2496 |
_gc_tracer_cm->report_concurrent_mode_failure(); |
|
2497 |
} |
|
19729
0ddd2b7bb9bd
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
ehelin
parents:
19552
diff
changeset
|
2498 |
|
0ddd2b7bb9bd
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
ehelin
parents:
19552
diff
changeset
|
2499 |
_gc_timer_cm->register_gc_end(os::elapsed_counter()); |
18025 | 2500 |
_gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
2501 |
||
2502 |
_concurrent_cycle_started = false; |
|
2503 |
} |
|
2504 |
} |
|
2505 |
||
2506 |
void G1CollectedHeap::trace_heap_after_concurrent_cycle() { |
|
2507 |
if (_concurrent_cycle_started) { |
|
2508 |
trace_heap_after_gc(_gc_tracer_cm); |
|
2509 |
} |
|
2510 |
} |
|
2511 |
||
2512 |
G1YCType G1CollectedHeap::yc_type() { |
|
2513 |
bool is_young = g1_policy()->gcs_are_young(); |
|
2514 |
bool is_initial_mark = g1_policy()->during_initial_mark_pause(); |
|
2515 |
bool is_during_mark = mark_in_progress(); |
|
2516 |
||
2517 |
if (is_initial_mark) { |
|
2518 |
return InitialMark; |
|
2519 |
} else if (is_during_mark) { |
|
2520 |
return DuringMark; |
|
2521 |
} else if (is_young) { |
|
2522 |
return Normal; |
|
2523 |
} else { |
|
2524 |
return Mixed; |
|
2525 |
} |
|
2526 |
} |
|
2527 |
||
4458
075a9ef4e467
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
4100
diff
changeset
|
2528 |
void G1CollectedHeap::collect(GCCause::Cause cause) { |
11754
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2529 |
assert_heap_not_locked(); |
4458
075a9ef4e467
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
4100
diff
changeset
|
2530 |
|
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2531 |
unsigned int gc_count_before; |
12934
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2532 |
unsigned int old_marking_count_before; |
11754
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2533 |
bool retry_gc; |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2534 |
|
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2535 |
do { |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2536 |
retry_gc = false; |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2537 |
|
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2538 |
{ |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2539 |
MutexLocker ml(Heap_lock); |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2540 |
|
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2541 |
// Read the GC count while holding the Heap_lock |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2542 |
gc_count_before = total_collections(); |
12934
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2543 |
old_marking_count_before = _old_marking_cycles_started; |
11754
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2544 |
} |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2545 |
|
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2546 |
if (should_do_concurrent_full_gc(cause)) { |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2547 |
// Schedule an initial-mark evacuation pause that will start a |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2548 |
// concurrent cycle. We're setting word_size to 0 which means that |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2549 |
// we are not requesting a post-GC allocation. |
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2550 |
VM_G1IncCollectionPause op(gc_count_before, |
7398 | 2551 |
0, /* word_size */ |
11754
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2552 |
true, /* should_initiate_conc_mark */ |
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2553 |
g1_policy()->max_pause_time_ms(), |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2554 |
cause); |
12227
371690c4f281
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
11756
diff
changeset
|
2555 |
|
4458
075a9ef4e467
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
4100
diff
changeset
|
2556 |
VMThread::execute(&op); |
11754
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2557 |
if (!op.pause_succeeded()) { |
12934
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2558 |
if (old_marking_count_before == _old_marking_cycles_started) { |
12227
371690c4f281
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
11756
diff
changeset
|
2559 |
retry_gc = op.should_retry_gc(); |
11754
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2560 |
} else { |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2561 |
// A Full GC happened while we were trying to schedule the |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2562 |
// initial-mark GC. No point in starting a new cycle given |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2563 |
// that the whole heap was collected anyway. |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2564 |
} |
12227
371690c4f281
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
11756
diff
changeset
|
2565 |
|
371690c4f281
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
11756
diff
changeset
|
2566 |
if (retry_gc) { |
371690c4f281
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
11756
diff
changeset
|
2567 |
if (GC_locker::is_active_and_needs_gc()) { |
371690c4f281
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
11756
diff
changeset
|
2568 |
GC_locker::stall_until_clear(); |
371690c4f281
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
11756
diff
changeset
|
2569 |
} |
371690c4f281
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
11756
diff
changeset
|
2570 |
} |
11754
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2571 |
} |
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2572 |
} else { |
11754
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2573 |
if (cause == GCCause::_gc_locker |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2574 |
DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2575 |
|
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2576 |
// Schedule a standard evacuation pause. We're setting word_size |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2577 |
// to 0 which means that we are not requesting a post-GC allocation. |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2578 |
VM_G1IncCollectionPause op(gc_count_before, |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2579 |
0, /* word_size */ |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2580 |
false, /* should_initiate_conc_mark */ |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2581 |
g1_policy()->max_pause_time_ms(), |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2582 |
cause); |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2583 |
VMThread::execute(&op); |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2584 |
} else { |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2585 |
// Schedule a Full GC. |
12934
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
2586 |
VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
11754
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2587 |
VMThread::execute(&op); |
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2588 |
} |
4458
075a9ef4e467
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
4100
diff
changeset
|
2589 |
} |
11754
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
2590 |
} while (retry_gc); |
1374 | 2591 |
} |
2592 |
||
2593 |
bool G1CollectedHeap::is_in(const void* p) const { |
|
11247 | 2594 |
if (_g1_committed.contains(p)) { |
2595 |
// Given that we know that p is in the committed space, |
|
2596 |
// heap_region_containing_raw() should successfully |
|
2597 |
// return the containing region. |
|
2598 |
HeapRegion* hr = heap_region_containing_raw(p); |
|
1374 | 2599 |
return hr->is_in(p); |
2600 |
} else { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
2601 |
return false; |
1374 | 2602 |
} |
2603 |
} |
|
2604 |
||
2605 |
// Iteration functions. |
|
2606 |
||
2607 |
// Iterates an OopClosure over all ref-containing fields of objects |
|
2608 |
// within a HeapRegion. |
|
2609 |
||
2610 |
class IterateOopClosureRegionClosure: public HeapRegionClosure { |
|
2611 |
MemRegion _mr; |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
2612 |
ExtendedOopClosure* _cl; |
1374 | 2613 |
public: |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
2614 |
IterateOopClosureRegionClosure(MemRegion mr, ExtendedOopClosure* cl) |
1374 | 2615 |
: _mr(mr), _cl(cl) {} |
2616 |
bool doHeapRegion(HeapRegion* r) { |
|
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2617 |
if (!r->continuesHumongous()) { |
1374 | 2618 |
r->oop_iterate(_cl); |
2619 |
} |
|
2620 |
return false; |
|
2621 |
} |
|
2622 |
}; |
|
2623 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
2624 |
void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
1374 | 2625 |
IterateOopClosureRegionClosure blk(_g1_committed, cl); |
9989 | 2626 |
heap_region_iterate(&blk); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
2627 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
2628 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
2629 |
void G1CollectedHeap::oop_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
1374 | 2630 |
IterateOopClosureRegionClosure blk(mr, cl); |
9989 | 2631 |
heap_region_iterate(&blk); |
1374 | 2632 |
} |
2633 |
||
2634 |
// Iterates an ObjectClosure over all objects within a HeapRegion. |
|
2635 |
||
2636 |
class IterateObjectClosureRegionClosure: public HeapRegionClosure { |
|
2637 |
ObjectClosure* _cl; |
|
2638 |
public: |
|
2639 |
IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} |
|
2640 |
bool doHeapRegion(HeapRegion* r) { |
|
2641 |
if (! r->continuesHumongous()) { |
|
2642 |
r->object_iterate(_cl); |
|
2643 |
} |
|
2644 |
return false; |
|
2645 |
} |
|
2646 |
}; |
|
2647 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
2648 |
void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
1374 | 2649 |
IterateObjectClosureRegionClosure blk(cl); |
9989 | 2650 |
heap_region_iterate(&blk); |
1374 | 2651 |
} |
2652 |
||
2653 |
// Calls a SpaceClosure on a HeapRegion. |
|
2654 |
||
2655 |
class SpaceClosureRegionClosure: public HeapRegionClosure { |
|
2656 |
SpaceClosure* _cl; |
|
2657 |
public: |
|
2658 |
SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} |
|
2659 |
bool doHeapRegion(HeapRegion* r) { |
|
2660 |
_cl->do_space(r); |
|
2661 |
return false; |
|
2662 |
} |
|
2663 |
}; |
|
2664 |
||
2665 |
void G1CollectedHeap::space_iterate(SpaceClosure* cl) { |
|
2666 |
SpaceClosureRegionClosure blk(cl); |
|
9989 | 2667 |
heap_region_iterate(&blk); |
1374 | 2668 |
} |
2669 |
||
9989 | 2670 |
void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
2671 |
_hrs.iterate(cl); |
|
1374 | 2672 |
} |
2673 |
||
2674 |
void |
|
2675 |
G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, |
|
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2676 |
uint worker_id, |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
2677 |
uint no_of_par_workers, |
1374 | 2678 |
jint claim_value) { |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2679 |
const uint regions = n_regions(); |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
2680 |
const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
2681 |
no_of_par_workers : |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
2682 |
1); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
2683 |
assert(UseDynamicNumberOfGCThreads || |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
2684 |
no_of_par_workers == workers()->total_workers(), |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
2685 |
"Non dynamic should use fixed number of workers"); |
1387 | 2686 |
// try to spread out the starting points of the workers |
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2687 |
const HeapRegion* start_hr = |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2688 |
start_region_for_worker(worker_id, no_of_par_workers); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2689 |
const uint start_index = start_hr->hrs_index(); |
1387 | 2690 |
|
2691 |
// each worker will actually look at all regions |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2692 |
for (uint count = 0; count < regions; ++count) { |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2693 |
const uint index = (start_index + count) % regions; |
1387 | 2694 |
assert(0 <= index && index < regions, "sanity"); |
2695 |
HeapRegion* r = region_at(index); |
|
2696 |
// we'll ignore "continues humongous" regions (we'll process them |
|
2697 |
// when we come across their corresponding "start humongous" |
|
2698 |
// region) and regions already claimed |
|
2699 |
if (r->claim_value() == claim_value || r->continuesHumongous()) { |
|
2700 |
continue; |
|
2701 |
} |
|
2702 |
// OK, try to claim it |
|
1374 | 2703 |
if (r->claimHeapRegion(claim_value)) { |
1387 | 2704 |
// success! |
2705 |
assert(!r->continuesHumongous(), "sanity"); |
|
2706 |
if (r->startsHumongous()) { |
|
2707 |
// If the region is "starts humongous" we'll iterate over its |
|
2708 |
// "continues humongous" first; in fact we'll do them |
|
2709 |
// first. The order is important. In on case, calling the |
|
2710 |
// closure on the "starts humongous" region might de-allocate |
|
2711 |
// and clear all its "continues humongous" regions and, as a |
|
2712 |
// result, we might end up processing them twice. So, we'll do |
|
2713 |
// them first (notice: most closures will ignore them anyway) and |
|
2714 |
// then we'll do the "starts humongous" region. |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2715 |
for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
1387 | 2716 |
HeapRegion* chr = region_at(ch_index); |
2717 |
||
2718 |
// if the region has already been claimed or it's not |
|
2719 |
// "continues humongous" we're done |
|
2720 |
if (chr->claim_value() == claim_value || |
|
2721 |
!chr->continuesHumongous()) { |
|
2722 |
break; |
|
2723 |
} |
|
2724 |
||
18025 | 2725 |
// No one should have claimed it directly. We can given |
1387 | 2726 |
// that we claimed its "starts humongous" region. |
2727 |
assert(chr->claim_value() != claim_value, "sanity"); |
|
2728 |
assert(chr->humongous_start_region() == r, "sanity"); |
|
2729 |
||
2730 |
if (chr->claimHeapRegion(claim_value)) { |
|
18025 | 2731 |
// we should always be able to claim it; no one else should |
1387 | 2732 |
// be trying to claim this region |
2733 |
||
2734 |
bool res2 = cl->doHeapRegion(chr); |
|
2735 |
assert(!res2, "Should not abort"); |
|
2736 |
||
2737 |
// Right now, this holds (i.e., no closure that actually |
|
2738 |
// does something with "continues humongous" regions |
|
2739 |
// clears them). We might have to weaken it in the future, |
|
2740 |
// but let's leave these two asserts here for extra safety. |
|
2741 |
assert(chr->continuesHumongous(), "should still be the case"); |
|
2742 |
assert(chr->humongous_start_region() == r, "sanity"); |
|
2743 |
} else { |
|
2744 |
guarantee(false, "we should not reach here"); |
|
2745 |
} |
|
2746 |
} |
|
2747 |
} |
|
2748 |
||
2749 |
assert(!r->continuesHumongous(), "sanity"); |
|
2750 |
bool res = cl->doHeapRegion(r); |
|
2751 |
assert(!res, "Should not abort"); |
|
2752 |
} |
|
2753 |
} |
|
2754 |
} |
|
2755 |
||
1422 | 2756 |
class ResetClaimValuesClosure: public HeapRegionClosure { |
2757 |
public: |
|
2758 |
bool doHeapRegion(HeapRegion* r) { |
|
2759 |
r->set_claim_value(HeapRegion::InitialClaimValue); |
|
2760 |
return false; |
|
2761 |
} |
|
2762 |
}; |
|
2763 |
||
11451
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
2764 |
void G1CollectedHeap::reset_heap_region_claim_values() { |
1422 | 2765 |
ResetClaimValuesClosure blk; |
2766 |
heap_region_iterate(&blk); |
|
2767 |
} |
|
2768 |
||
11451
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
2769 |
void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
2770 |
ResetClaimValuesClosure blk; |
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
2771 |
collection_set_iterate(&blk); |
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
2772 |
} |
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
2773 |
|
1387 | 2774 |
#ifdef ASSERT |
2775 |
// This checks whether all regions in the heap have the correct claim |
|
2776 |
// value. I also piggy-backed on this a check to ensure that the |
|
2777 |
// humongous_start_region() information on "continues humongous" |
|
2778 |
// regions is correct. |
|
2779 |
||
2780 |
class CheckClaimValuesClosure : public HeapRegionClosure { |
|
2781 |
private: |
|
2782 |
jint _claim_value; |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2783 |
uint _failures; |
1387 | 2784 |
HeapRegion* _sh_region; |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2785 |
|
1387 | 2786 |
public: |
2787 |
CheckClaimValuesClosure(jint claim_value) : |
|
2788 |
_claim_value(claim_value), _failures(0), _sh_region(NULL) { } |
|
2789 |
bool doHeapRegion(HeapRegion* r) { |
|
2790 |
if (r->claim_value() != _claim_value) { |
|
11176
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2791 |
gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
1387 | 2792 |
"claim value = %d, should be %d", |
11176
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2793 |
HR_FORMAT_PARAMS(r), |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2794 |
r->claim_value(), _claim_value); |
1387 | 2795 |
++_failures; |
2796 |
} |
|
2797 |
if (!r->isHumongous()) { |
|
2798 |
_sh_region = NULL; |
|
2799 |
} else if (r->startsHumongous()) { |
|
2800 |
_sh_region = r; |
|
2801 |
} else if (r->continuesHumongous()) { |
|
2802 |
if (r->humongous_start_region() != _sh_region) { |
|
11176
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2803 |
gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
1387 | 2804 |
"HS = "PTR_FORMAT", should be "PTR_FORMAT, |
11176
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2805 |
HR_FORMAT_PARAMS(r), |
1387 | 2806 |
r->humongous_start_region(), |
2807 |
_sh_region); |
|
2808 |
++_failures; |
|
1374 | 2809 |
} |
2810 |
} |
|
1387 | 2811 |
return false; |
2812 |
} |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2813 |
uint failures() { return _failures; } |
1387 | 2814 |
}; |
2815 |
||
2816 |
bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { |
|
2817 |
CheckClaimValuesClosure cl(claim_value); |
|
2818 |
heap_region_iterate(&cl); |
|
2819 |
return cl.failures() == 0; |
|
2820 |
} |
|
11176
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2821 |
|
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2822 |
class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2823 |
private: |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2824 |
jint _claim_value; |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2825 |
uint _failures; |
11176
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2826 |
|
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2827 |
public: |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2828 |
CheckClaimValuesInCSetHRClosure(jint claim_value) : |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2829 |
_claim_value(claim_value), _failures(0) { } |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2830 |
|
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2831 |
uint failures() { return _failures; } |
11176
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2832 |
|
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2833 |
bool doHeapRegion(HeapRegion* hr) { |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2834 |
assert(hr->in_collection_set(), "how?"); |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2835 |
assert(!hr->isHumongous(), "H-region in CSet"); |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2836 |
if (hr->claim_value() != _claim_value) { |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2837 |
gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2838 |
"claim value = %d, should be %d", |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2839 |
HR_FORMAT_PARAMS(hr), |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2840 |
hr->claim_value(), _claim_value); |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2841 |
_failures += 1; |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2842 |
} |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2843 |
return false; |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2844 |
} |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2845 |
}; |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2846 |
|
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2847 |
bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2848 |
CheckClaimValuesInCSetHRClosure cl(claim_value); |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2849 |
collection_set_iterate(&cl); |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2850 |
return cl.failures() == 0; |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2851 |
} |
1387 | 2852 |
#endif // ASSERT |
1374 | 2853 |
|
11248
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2854 |
// Clear the cached CSet starting regions and (more importantly) |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2855 |
// the time stamps. Called when we reset the GC time stamp. |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2856 |
void G1CollectedHeap::clear_cset_start_regions() { |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2857 |
assert(_worker_cset_start_region != NULL, "sanity"); |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2858 |
assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2859 |
|
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2860 |
int n_queues = MAX2((int)ParallelGCThreads, 1); |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2861 |
for (int i = 0; i < n_queues; i++) { |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2862 |
_worker_cset_start_region[i] = NULL; |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2863 |
_worker_cset_start_region_time_stamp[i] = 0; |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2864 |
} |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2865 |
} |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2866 |
|
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2867 |
// Given the id of a worker, obtain or calculate a suitable |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2868 |
// starting region for iterating over the current collection set. |
11176
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2869 |
HeapRegion* G1CollectedHeap::start_cset_region_for_worker(int worker_i) { |
11248
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2870 |
assert(get_gc_time_stamp() > 0, "should have been updated by now"); |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2871 |
|
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2872 |
HeapRegion* result = NULL; |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2873 |
unsigned gc_time_stamp = get_gc_time_stamp(); |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2874 |
|
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2875 |
if (_worker_cset_start_region_time_stamp[worker_i] == gc_time_stamp) { |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2876 |
// Cached starting region for current worker was set |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2877 |
// during the current pause - so it's valid. |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2878 |
// Note: the cached starting heap region may be NULL |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2879 |
// (when the collection set is empty). |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2880 |
result = _worker_cset_start_region[worker_i]; |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2881 |
assert(result == NULL || result->in_collection_set(), "sanity"); |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2882 |
return result; |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2883 |
} |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2884 |
|
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2885 |
// The cached entry was not valid so let's calculate |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2886 |
// a suitable starting heap region for this worker. |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2887 |
|
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2888 |
// We want the parallel threads to start their collection |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2889 |
// set iteration at different collection set regions to |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2890 |
// avoid contention. |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2891 |
// If we have: |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2892 |
// n collection set regions |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2893 |
// p threads |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2894 |
// Then thread t will start at region floor ((t * n) / p) |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2895 |
|
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2896 |
result = g1_policy()->collection_set(); |
11176
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2897 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2898 |
uint cs_size = g1_policy()->cset_region_length(); |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
2899 |
uint active_workers = workers()->active_workers(); |
11248
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2900 |
assert(UseDynamicNumberOfGCThreads || |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2901 |
active_workers == workers()->total_workers(), |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2902 |
"Unless dynamic should use total workers"); |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2903 |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2904 |
uint end_ind = (cs_size * worker_i) / active_workers; |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2905 |
uint start_ind = 0; |
11248
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2906 |
|
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2907 |
if (worker_i > 0 && |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2908 |
_worker_cset_start_region_time_stamp[worker_i - 1] == gc_time_stamp) { |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2909 |
// Previous workers starting region is valid |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2910 |
// so let's iterate from there |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2911 |
start_ind = (cs_size * (worker_i - 1)) / active_workers; |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2912 |
result = _worker_cset_start_region[worker_i - 1]; |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2913 |
} |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2914 |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2915 |
for (uint i = start_ind; i < end_ind; i++) { |
11176
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2916 |
result = result->next_in_collection_set(); |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2917 |
} |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2918 |
} |
11248
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2919 |
|
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2920 |
// Note: the calculated starting heap region may be NULL |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2921 |
// (when the collection set is empty). |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2922 |
assert(result == NULL || result->in_collection_set(), "sanity"); |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2923 |
assert(_worker_cset_start_region_time_stamp[worker_i] != gc_time_stamp, |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2924 |
"should be updated only once per pause"); |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2925 |
_worker_cset_start_region[worker_i] = result; |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2926 |
OrderAccess::storestore(); |
5ff61b0fdf3d
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
11247
diff
changeset
|
2927 |
_worker_cset_start_region_time_stamp[worker_i] = gc_time_stamp; |
11176
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2928 |
return result; |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2929 |
} |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
2930 |
|
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2931 |
HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2932 |
uint no_of_par_workers) { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2933 |
uint worker_num = |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2934 |
G1CollectedHeap::use_parallel_gc_threads() ? no_of_par_workers : 1U; |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2935 |
assert(UseDynamicNumberOfGCThreads || |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2936 |
no_of_par_workers == workers()->total_workers(), |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2937 |
"Non dynamic should use fixed number of workers"); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2938 |
const uint start_index = n_regions() * worker_i / worker_num; |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2939 |
return region_at(start_index); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2940 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
2941 |
|
1374 | 2942 |
void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
2943 |
HeapRegion* r = g1_policy()->collection_set(); |
|
2944 |
while (r != NULL) { |
|
2945 |
HeapRegion* next = r->next_in_collection_set(); |
|
2946 |
if (cl->doHeapRegion(r)) { |
|
2947 |
cl->incomplete(); |
|
2948 |
return; |
|
2949 |
} |
|
2950 |
r = next; |
|
2951 |
} |
|
2952 |
} |
|
2953 |
||
2954 |
void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, |
|
2955 |
HeapRegionClosure *cl) { |
|
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2956 |
if (r == NULL) { |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2957 |
// The CSet is empty so there's nothing to do. |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2958 |
return; |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2959 |
} |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2960 |
|
1374 | 2961 |
assert(r->in_collection_set(), |
2962 |
"Start region must be a member of the collection set."); |
|
2963 |
HeapRegion* cur = r; |
|
2964 |
while (cur != NULL) { |
|
2965 |
HeapRegion* next = cur->next_in_collection_set(); |
|
2966 |
if (cl->doHeapRegion(cur) && false) { |
|
2967 |
cl->incomplete(); |
|
2968 |
return; |
|
2969 |
} |
|
2970 |
cur = next; |
|
2971 |
} |
|
2972 |
cur = g1_policy()->collection_set(); |
|
2973 |
while (cur != r) { |
|
2974 |
HeapRegion* next = cur->next_in_collection_set(); |
|
2975 |
if (cl->doHeapRegion(cur) && false) { |
|
2976 |
cl->incomplete(); |
|
2977 |
return; |
|
2978 |
} |
|
2979 |
cur = next; |
|
2980 |
} |
|
2981 |
} |
|
2982 |
||
2983 |
CompactibleSpace* G1CollectedHeap::first_compactible_space() { |
|
9989 | 2984 |
return n_regions() > 0 ? region_at(0) : NULL; |
1374 | 2985 |
} |
2986 |
||
2987 |
||
2988 |
Space* G1CollectedHeap::space_containing(const void* addr) const { |
|
2989 |
Space* res = heap_region_containing(addr); |
|
2990 |
return res; |
|
2991 |
} |
|
2992 |
||
2993 |
HeapWord* G1CollectedHeap::block_start(const void* addr) const { |
|
2994 |
Space* sp = space_containing(addr); |
|
2995 |
if (sp != NULL) { |
|
2996 |
return sp->block_start(addr); |
|
2997 |
} |
|
2998 |
return NULL; |
|
2999 |
} |
|
3000 |
||
3001 |
size_t G1CollectedHeap::block_size(const HeapWord* addr) const { |
|
3002 |
Space* sp = space_containing(addr); |
|
3003 |
assert(sp != NULL, "block_size of address outside of heap"); |
|
3004 |
return sp->block_size(addr); |
|
3005 |
} |
|
3006 |
||
3007 |
bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { |
|
3008 |
Space* sp = space_containing(addr); |
|
3009 |
return sp->block_is_obj(addr); |
|
3010 |
} |
|
3011 |
||
3012 |
bool G1CollectedHeap::supports_tlab_allocation() const { |
|
3013 |
return true; |
|
3014 |
} |
|
3015 |
||
3016 |
size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { |
|
3017 |
return HeapRegion::GrainBytes; |
|
3018 |
} |
|
3019 |
||
3020 |
size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { |
|
3021 |
// Return the remaining space in the cur alloc region, but not less than |
|
3022 |
// the min TLAB size. |
|
5078
e865c7385a24
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
5033
diff
changeset
|
3023 |
|
e865c7385a24
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
5033
diff
changeset
|
3024 |
// Also, this value can be at most the humongous object threshold, |
18025 | 3025 |
// since we can't allow tlabs to grow big enough to accommodate |
5078
e865c7385a24
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
5033
diff
changeset
|
3026 |
// humongous objects. |
e865c7385a24
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
5033
diff
changeset
|
3027 |
|
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
3028 |
HeapRegion* hr = _mutator_alloc_region.get(); |
5078
e865c7385a24
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
5033
diff
changeset
|
3029 |
size_t max_tlab_size = _humongous_object_threshold_in_words * wordSize; |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
3030 |
if (hr == NULL) { |
5078
e865c7385a24
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
5033
diff
changeset
|
3031 |
return max_tlab_size; |
1374 | 3032 |
} else { |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
3033 |
return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab_size); |
1374 | 3034 |
} |
3035 |
} |
|
3036 |
||
3037 |
size_t G1CollectedHeap::max_capacity() const { |
|
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
8072
diff
changeset
|
3038 |
return _g1_reserved.byte_size(); |
1374 | 3039 |
} |
3040 |
||
3041 |
jlong G1CollectedHeap::millis_since_last_gc() { |
|
3042 |
// assert(false, "NYI"); |
|
3043 |
return 0; |
|
3044 |
} |
|
3045 |
||
3046 |
void G1CollectedHeap::prepare_for_verify() { |
|
3047 |
if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { |
|
3048 |
ensure_parsability(false); |
|
3049 |
} |
|
3050 |
g1_rem_set()->prepare_for_verify(); |
|
3051 |
} |
|
3052 |
||
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3053 |
bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3054 |
VerifyOption vo) { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3055 |
switch (vo) { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3056 |
case VerifyOption_G1UsePrevMarking: |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3057 |
return hr->obj_allocated_since_prev_marking(obj); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3058 |
case VerifyOption_G1UseNextMarking: |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3059 |
return hr->obj_allocated_since_next_marking(obj); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3060 |
case VerifyOption_G1UseMarkWord: |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3061 |
return false; |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3062 |
default: |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3063 |
ShouldNotReachHere(); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3064 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3065 |
return false; // keep some compilers happy |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3066 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3067 |
|
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3068 |
HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3069 |
switch (vo) { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3070 |
case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3071 |
case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3072 |
case VerifyOption_G1UseMarkWord: return NULL; |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3073 |
default: ShouldNotReachHere(); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3074 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3075 |
return NULL; // keep some compilers happy |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3076 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3077 |
|
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3078 |
bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3079 |
switch (vo) { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3080 |
case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3081 |
case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3082 |
case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3083 |
default: ShouldNotReachHere(); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3084 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3085 |
return false; // keep some compilers happy |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3086 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3087 |
|
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3088 |
const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3089 |
switch (vo) { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3090 |
case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3091 |
case VerifyOption_G1UseNextMarking: return "NTAMS"; |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3092 |
case VerifyOption_G1UseMarkWord: return "NONE"; |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3093 |
default: ShouldNotReachHere(); |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3094 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3095 |
return NULL; // keep some compilers happy |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3096 |
} |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3097 |
|
19339 | 3098 |
// TODO: VerifyRootsClosure extends OopsInGenClosure so that we can |
3099 |
// pass it as the perm_blk to SharedHeap::process_strong_roots. |
|
3100 |
// When process_strong_roots stop calling perm_blk->younger_refs_iterate |
|
3101 |
// we can change this closure to extend the simpler OopClosure. |
|
3102 |
class VerifyRootsClosure: public OopsInGenClosure { |
|
3103 |
private: |
|
3104 |
G1CollectedHeap* _g1h; |
|
3105 |
VerifyOption _vo; |
|
3106 |
bool _failures; |
|
3107 |
public: |
|
3108 |
// _vo == UsePrevMarking -> use "prev" marking information, |
|
3109 |
// _vo == UseNextMarking -> use "next" marking information, |
|
3110 |
// _vo == UseMarkWord -> use mark word from object header. |
|
3111 |
VerifyRootsClosure(VerifyOption vo) : |
|
3112 |
_g1h(G1CollectedHeap::heap()), |
|
3113 |
_vo(vo), |
|
3114 |
_failures(false) { } |
|
3115 |
||
3116 |
bool failures() { return _failures; } |
|
3117 |
||
3118 |
template <class T> void do_oop_nv(T* p) { |
|
3119 |
T heap_oop = oopDesc::load_heap_oop(p); |
|
3120 |
if (!oopDesc::is_null(heap_oop)) { |
|
3121 |
oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
3122 |
if (_g1h->is_obj_dead_cond(obj, _vo)) { |
|
3123 |
gclog_or_tty->print_cr("Root location "PTR_FORMAT" " |
|
3124 |
"points to dead obj "PTR_FORMAT, p, (void*) obj); |
|
3125 |
if (_vo == VerifyOption_G1UseMarkWord) { |
|
3126 |
gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); |
|
3127 |
} |
|
3128 |
obj->print_on(gclog_or_tty); |
|
3129 |
_failures = true; |
|
3130 |
} |
|
3131 |
} |
|
3132 |
} |
|
3133 |
||
3134 |
void do_oop(oop* p) { do_oop_nv(p); } |
|
3135 |
void do_oop(narrowOop* p) { do_oop_nv(p); } |
|
3136 |
}; |
|
3137 |
||
3138 |
class G1VerifyCodeRootOopClosure: public OopsInGenClosure { |
|
3139 |
G1CollectedHeap* _g1h; |
|
3140 |
OopClosure* _root_cl; |
|
3141 |
nmethod* _nm; |
|
3142 |
VerifyOption _vo; |
|
3143 |
bool _failures; |
|
3144 |
||
3145 |
template <class T> void do_oop_work(T* p) { |
|
3146 |
// First verify that this root is live |
|
3147 |
_root_cl->do_oop(p); |
|
3148 |
||
3149 |
if (!G1VerifyHeapRegionCodeRoots) { |
|
3150 |
// We're not verifying the code roots attached to heap region. |
|
3151 |
return; |
|
3152 |
} |
|
3153 |
||
3154 |
// Don't check the code roots during marking verification in a full GC |
|
3155 |
if (_vo == VerifyOption_G1UseMarkWord) { |
|
3156 |
return; |
|
3157 |
} |
|
3158 |
||
3159 |
// Now verify that the current nmethod (which contains p) is |
|
3160 |
// in the code root list of the heap region containing the |
|
3161 |
// object referenced by p. |
|
3162 |
||
3163 |
T heap_oop = oopDesc::load_heap_oop(p); |
|
3164 |
if (!oopDesc::is_null(heap_oop)) { |
|
3165 |
oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
3166 |
||
3167 |
// Now fetch the region containing the object |
|
3168 |
HeapRegion* hr = _g1h->heap_region_containing(obj); |
|
3169 |
HeapRegionRemSet* hrrs = hr->rem_set(); |
|
3170 |
// Verify that the strong code root list for this region |
|
3171 |
// contains the nmethod |
|
3172 |
if (!hrrs->strong_code_roots_list_contains(_nm)) { |
|
3173 |
gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " |
|
3174 |
"from nmethod "PTR_FORMAT" not in strong " |
|
3175 |
"code roots for region ["PTR_FORMAT","PTR_FORMAT")", |
|
3176 |
p, _nm, hr->bottom(), hr->end()); |
|
3177 |
_failures = true; |
|
3178 |
} |
|
3179 |
} |
|
3180 |
} |
|
3181 |
||
3182 |
public: |
|
3183 |
G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): |
|
3184 |
_g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} |
|
3185 |
||
3186 |
void do_oop(oop* p) { do_oop_work(p); } |
|
3187 |
void do_oop(narrowOop* p) { do_oop_work(p); } |
|
3188 |
||
3189 |
void set_nmethod(nmethod* nm) { _nm = nm; } |
|
3190 |
bool failures() { return _failures; } |
|
3191 |
}; |
|
3192 |
||
3193 |
class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { |
|
3194 |
G1VerifyCodeRootOopClosure* _oop_cl; |
|
3195 |
||
3196 |
public: |
|
3197 |
G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): |
|
3198 |
_oop_cl(oop_cl) {} |
|
3199 |
||
3200 |
void do_code_blob(CodeBlob* cb) { |
|
3201 |
nmethod* nm = cb->as_nmethod_or_null(); |
|
3202 |
if (nm != NULL) { |
|
3203 |
_oop_cl->set_nmethod(nm); |
|
3204 |
nm->oops_do(_oop_cl); |
|
3205 |
} |
|
3206 |
} |
|
3207 |
}; |
|
3208 |
||
3209 |
class YoungRefCounterClosure : public OopClosure { |
|
3210 |
G1CollectedHeap* _g1h; |
|
3211 |
int _count; |
|
3212 |
public: |
|
3213 |
YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} |
|
3214 |
void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } |
|
3215 |
void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
|
3216 |
||
3217 |
int count() { return _count; } |
|
3218 |
void reset_count() { _count = 0; }; |
|
3219 |
}; |
|
3220 |
||
3221 |
class VerifyKlassClosure: public KlassClosure { |
|
3222 |
YoungRefCounterClosure _young_ref_counter_closure; |
|
3223 |
OopClosure *_oop_closure; |
|
3224 |
public: |
|
3225 |
VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} |
|
3226 |
void do_klass(Klass* k) { |
|
3227 |
k->oops_do(_oop_closure); |
|
3228 |
||
3229 |
_young_ref_counter_closure.reset_count(); |
|
3230 |
k->oops_do(&_young_ref_counter_closure); |
|
3231 |
if (_young_ref_counter_closure.count() > 0) { |
|
3232 |
guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); |
|
3233 |
} |
|
3234 |
} |
|
3235 |
}; |
|
3236 |
||
1374 | 3237 |
class VerifyLivenessOopClosure: public OopClosure { |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3238 |
G1CollectedHeap* _g1h; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3239 |
VerifyOption _vo; |
1374 | 3240 |
public: |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3241 |
VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3242 |
_g1h(g1h), _vo(vo) |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3243 |
{ } |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
3244 |
void do_oop(narrowOop *p) { do_oop_work(p); } |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
3245 |
void do_oop( oop *p) { do_oop_work(p); } |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
3246 |
|
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
3247 |
template <class T> void do_oop_work(T *p) { |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
3248 |
oop obj = oopDesc::load_decode_heap_oop(p); |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3249 |
guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
3250 |
"Dead object referenced by a not dead object"); |
1374 | 3251 |
} |
3252 |
}; |
|
3253 |
||
3254 |
class VerifyObjsInRegionClosure: public ObjectClosure { |
|
3000 | 3255 |
private: |
1374 | 3256 |
G1CollectedHeap* _g1h; |
3257 |
size_t _live_bytes; |
|
3258 |
HeapRegion *_hr; |
|
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3259 |
VerifyOption _vo; |
1374 | 3260 |
public: |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3261 |
// _vo == UsePrevMarking -> use "prev" marking information, |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3262 |
// _vo == UseNextMarking -> use "next" marking information, |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3263 |
// _vo == UseMarkWord -> use mark word from object header. |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3264 |
VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3265 |
: _live_bytes(0), _hr(hr), _vo(vo) { |
1374 | 3266 |
_g1h = G1CollectedHeap::heap(); |
3267 |
} |
|
3268 |
void do_object(oop o) { |
|
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3269 |
VerifyLivenessOopClosure isLive(_g1h, _vo); |
1374 | 3270 |
assert(o != NULL, "Huh?"); |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3271 |
if (!_g1h->is_obj_dead_cond(o, _vo)) { |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3272 |
// If the object is alive according to the mark word, |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3273 |
// then verify that the marking information agrees. |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3274 |
// Note we can't verify the contra-positive of the |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3275 |
// above: if the object is dead (according to the mark |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3276 |
// word), it may not be marked, or may have been marked |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3277 |
// but has since became dead, or may have been allocated |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3278 |
// since the last marking. |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3279 |
if (_vo == VerifyOption_G1UseMarkWord) { |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3280 |
guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3281 |
} |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3282 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
3283 |
o->oop_iterate_no_header(&isLive); |
5345
d3bd6e8757d8
6943926: G1: Integer overflow during heap region verification
johnc
parents:
5344
diff
changeset
|
3284 |
if (!_hr->obj_allocated_since_prev_marking(o)) { |
d3bd6e8757d8
6943926: G1: Integer overflow during heap region verification
johnc
parents:
5344
diff
changeset
|
3285 |
size_t obj_size = o->size(); // Make sure we don't overflow |
d3bd6e8757d8
6943926: G1: Integer overflow during heap region verification
johnc
parents:
5344
diff
changeset
|
3286 |
_live_bytes += (obj_size * HeapWordSize); |
d3bd6e8757d8
6943926: G1: Integer overflow during heap region verification
johnc
parents:
5344
diff
changeset
|
3287 |
} |
1374 | 3288 |
} |
3289 |
} |
|
3290 |
size_t live_bytes() { return _live_bytes; } |
|
3291 |
}; |
|
3292 |
||
3293 |
class PrintObjsInRegionClosure : public ObjectClosure { |
|
3294 |
HeapRegion *_hr; |
|
3295 |
G1CollectedHeap *_g1; |
|
3296 |
public: |
|
3297 |
PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { |
|
3298 |
_g1 = G1CollectedHeap::heap(); |
|
3299 |
}; |
|
3300 |
||
3301 |
void do_object(oop o) { |
|
3302 |
if (o != NULL) { |
|
3303 |
HeapWord *start = (HeapWord *) o; |
|
3304 |
size_t word_sz = o->size(); |
|
3305 |
gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT |
|
3306 |
" isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", |
|
3307 |
(void*) o, word_sz, |
|
3308 |
_g1->isMarkedPrev(o), |
|
3309 |
_g1->isMarkedNext(o), |
|
3310 |
_hr->obj_allocated_since_prev_marking(o)); |
|
3311 |
HeapWord *end = start + word_sz; |
|
3312 |
HeapWord *cur; |
|
3313 |
int *val; |
|
3314 |
for (cur = start; cur < end; cur++) { |
|
3315 |
val = (int *) cur; |
|
3316 |
gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); |
|
3317 |
} |
|
3318 |
} |
|
3319 |
} |
|
3320 |
}; |
|
3321 |
||
3322 |
class VerifyRegionClosure: public HeapRegionClosure { |
|
3000 | 3323 |
private: |
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3324 |
bool _par; |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3325 |
VerifyOption _vo; |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
3326 |
bool _failures; |
3000 | 3327 |
public: |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3328 |
// _vo == UsePrevMarking -> use "prev" marking information, |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3329 |
// _vo == UseNextMarking -> use "next" marking information, |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3330 |
// _vo == UseMarkWord -> use mark word from object header. |
12379 | 3331 |
VerifyRegionClosure(bool par, VerifyOption vo) |
3332 |
: _par(par), |
|
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3333 |
_vo(vo), |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3334 |
_failures(false) {} |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3335 |
|
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3336 |
bool failures() { |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3337 |
return _failures; |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3338 |
} |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
3339 |
|
1374 | 3340 |
bool doHeapRegion(HeapRegion* r) { |
2249
fb8abed44792
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
2248
diff
changeset
|
3341 |
if (!r->continuesHumongous()) { |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3342 |
bool failures = false; |
12379 | 3343 |
r->verify(_vo, &failures); |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3344 |
if (failures) { |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3345 |
_failures = true; |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3346 |
} else { |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3347 |
VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3348 |
r->object_iterate(¬_dead_yet_cl); |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
3349 |
if (_vo != VerifyOption_G1UseNextMarking) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
3350 |
if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
3351 |
gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
3352 |
"max_live_bytes "SIZE_FORMAT" " |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
3353 |
"< calculated "SIZE_FORMAT, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
3354 |
r->bottom(), r->end(), |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
3355 |
r->max_live_bytes(), |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3356 |
not_dead_yet_cl.live_bytes()); |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
3357 |
_failures = true; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
3358 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
3359 |
} else { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
3360 |
// When vo == UseNextMarking we cannot currently do a sanity |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
3361 |
// check on the live bytes as the calculation has not been |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
3362 |
// finalized yet. |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3363 |
} |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3364 |
} |
1374 | 3365 |
} |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3366 |
return false; // stop the region iteration if we hit a failure |
1374 | 3367 |
} |
3368 |
}; |
|
3369 |
||
19339 | 3370 |
// This is the task used for parallel verification of the heap regions |
1422 | 3371 |
|
3372 |
class G1ParVerifyTask: public AbstractGangTask { |
|
3373 |
private: |
|
3374 |
G1CollectedHeap* _g1h; |
|
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3375 |
VerifyOption _vo; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3376 |
bool _failures; |
1422 | 3377 |
|
3378 |
public: |
|
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3379 |
// _vo == UsePrevMarking -> use "prev" marking information, |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3380 |
// _vo == UseNextMarking -> use "next" marking information, |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3381 |
// _vo == UseMarkWord -> use mark word from object header. |
12379 | 3382 |
G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
1422 | 3383 |
AbstractGangTask("Parallel verify task"), |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
3384 |
_g1h(g1h), |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3385 |
_vo(vo), |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3386 |
_failures(false) { } |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3387 |
|
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3388 |
bool failures() { |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3389 |
return _failures; |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3390 |
} |
1422 | 3391 |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
3392 |
void work(uint worker_id) { |
2249
fb8abed44792
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
2248
diff
changeset
|
3393 |
HandleMark hm; |
12379 | 3394 |
VerifyRegionClosure blk(true, _vo); |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
3395 |
_g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
3396 |
_g1h->workers()->active_workers(), |
1422 | 3397 |
HeapRegion::ParVerifyClaimValue); |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3398 |
if (blk.failures()) { |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3399 |
_failures = true; |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3400 |
} |
1422 | 3401 |
} |
3402 |
}; |
|
3403 |
||
19339 | 3404 |
void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
16606
926ac1e006db
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
16604
diff
changeset
|
3405 |
if (SafepointSynchronize::is_at_safepoint()) { |
19339 | 3406 |
assert(Thread::current()->is_VM_thread(), |
3407 |
"Expected to be executed serially by the VM thread at this point"); |
|
3408 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
3409 |
if (!silent) { gclog_or_tty->print("Roots "); } |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3410 |
VerifyRootsClosure rootsCl(vo); |
19339 | 3411 |
G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
3412 |
G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
3413 |
VerifyKlassClosure klassCl(this, &rootsCl); |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3414 |
|
9342
456b8d0486b5
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
parents:
9338
diff
changeset
|
3415 |
// We apply the relevant closures to all the oops in the |
456b8d0486b5
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
parents:
9338
diff
changeset
|
3416 |
// system dictionary, the string table and the code cache. |
11754
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
3417 |
const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3418 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
3419 |
// Need cleared claim bits for the strong roots processing |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
3420 |
ClassLoaderDataGraph::clear_claimed_marks(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
3421 |
|
9342
456b8d0486b5
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
parents:
9338
diff
changeset
|
3422 |
process_strong_roots(true, // activate StrongRootsScope |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
3423 |
false, // we set "is scavenging" to false, |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
3424 |
// so we don't reset the dirty cards. |
11754
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
3425 |
ScanningOption(so), // roots scanning options |
1374 | 3426 |
&rootsCl, |
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3590
diff
changeset
|
3427 |
&blobsCl, |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
3428 |
&klassCl |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
3429 |
); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
3430 |
|
19339 | 3431 |
bool failures = rootsCl.failures() || codeRootsCl.failures(); |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3432 |
|
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3433 |
if (vo != VerifyOption_G1UseMarkWord) { |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3434 |
// If we're verifying during a full GC then the region sets |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3435 |
// will have been torn down at the start of the GC. Therefore |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3436 |
// verifying the region sets will fail. So we only verify |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3437 |
// the region sets when not in a full GC. |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3438 |
if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3439 |
verify_region_sets(); |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3440 |
} |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3441 |
|
7923 | 3442 |
if (!silent) { gclog_or_tty->print("HeapRegions "); } |
1422 | 3443 |
if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
3444 |
assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), |
|
3445 |
"sanity check"); |
|
3446 |
||
12379 | 3447 |
G1ParVerifyTask task(this, vo); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
3448 |
assert(UseDynamicNumberOfGCThreads || |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
3449 |
workers()->active_workers() == workers()->total_workers(), |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
3450 |
"If not dynamic should be using all the workers"); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
3451 |
int n_workers = workers()->active_workers(); |
1422 | 3452 |
set_par_threads(n_workers); |
3453 |
workers()->run_task(&task); |
|
3454 |
set_par_threads(0); |
|
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3455 |
if (task.failures()) { |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3456 |
failures = true; |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3457 |
} |
1422 | 3458 |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
3459 |
// Checks that the expected amount of parallel work was done. |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
3460 |
// The implication is that n_workers is > 0. |
1422 | 3461 |
assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
3462 |
"sanity check"); |
|
3463 |
||
3464 |
reset_heap_region_claim_values(); |
|
3465 |
||
3466 |
assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), |
|
3467 |
"sanity check"); |
|
3468 |
} else { |
|
12379 | 3469 |
VerifyRegionClosure blk(false, vo); |
9989 | 3470 |
heap_region_iterate(&blk); |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3471 |
if (blk.failures()) { |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3472 |
failures = true; |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3473 |
} |
1422 | 3474 |
} |
7923 | 3475 |
if (!silent) gclog_or_tty->print("RemSet "); |
1374 | 3476 |
rem_set()->verify(); |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3477 |
|
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3478 |
if (failures) { |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3479 |
gclog_or_tty->print_cr("Heap:"); |
10997
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10996
diff
changeset
|
3480 |
// It helps to have the per-region information in the output to |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10996
diff
changeset
|
3481 |
// help us track down what went wrong. This is why we call |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10996
diff
changeset
|
3482 |
// print_extended_on() instead of print_on(). |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10996
diff
changeset
|
3483 |
print_extended_on(gclog_or_tty); |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3484 |
gclog_or_tty->print_cr(""); |
5542
be05c5ffe905
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
5540
diff
changeset
|
3485 |
#ifndef PRODUCT |
4099 | 3486 |
if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
5344 | 3487 |
concurrent_mark()->print_reachable("at-verification-failure", |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9989
diff
changeset
|
3488 |
vo, false /* all */); |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3489 |
} |
5542
be05c5ffe905
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
5540
diff
changeset
|
3490 |
#endif |
4023
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3491 |
gclog_or_tty->flush(); |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3492 |
} |
6c3401503290
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
4022
diff
changeset
|
3493 |
guarantee(!failures, "there should not have been any failures"); |
1374 | 3494 |
} else { |
16606
926ac1e006db
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
16604
diff
changeset
|
3495 |
if (!silent) |
926ac1e006db
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
16604
diff
changeset
|
3496 |
gclog_or_tty->print("(SKIPPING roots, heapRegionSets, heapRegions, remset) "); |
1374 | 3497 |
} |
3498 |
} |
|
3499 |
||
19339 | 3500 |
void G1CollectedHeap::verify(bool silent) { |
3501 |
verify(silent, VerifyOption_G1UsePrevMarking); |
|
3502 |
} |
|
3503 |
||
3504 |
double G1CollectedHeap::verify(bool guard, const char* msg) { |
|
3505 |
double verify_time_ms = 0.0; |
|
3506 |
||
3507 |
if (guard && total_collections() >= VerifyGCStartAt) { |
|
3508 |
double verify_start = os::elapsedTime(); |
|
3509 |
HandleMark hm; // Discard invalid handles created during verification |
|
3510 |
prepare_for_verify(); |
|
3511 |
Universe::verify(VerifyOption_G1UsePrevMarking, msg); |
|
3512 |
verify_time_ms = (os::elapsedTime() - verify_start) * 1000; |
|
3513 |
} |
|
3514 |
||
3515 |
return verify_time_ms; |
|
3516 |
} |
|
3517 |
||
3518 |
void G1CollectedHeap::verify_before_gc() { |
|
3519 |
double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); |
|
3520 |
g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); |
|
3521 |
} |
|
3522 |
||
3523 |
void G1CollectedHeap::verify_after_gc() { |
|
3524 |
double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); |
|
3525 |
g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); |
|
3526 |
} |
|
3527 |
||
1374 | 3528 |
class PrintRegionClosure: public HeapRegionClosure { |
3529 |
outputStream* _st; |
|
3530 |
public: |
|
3531 |
PrintRegionClosure(outputStream* st) : _st(st) {} |
|
3532 |
bool doHeapRegion(HeapRegion* r) { |
|
3533 |
r->print_on(_st); |
|
3534 |
return false; |
|
3535 |
} |
|
3536 |
}; |
|
3537 |
||
3538 |
void G1CollectedHeap::print_on(outputStream* st) const { |
|
3191
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3539 |
st->print(" %-20s", "garbage-first heap"); |
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3540 |
st->print(" total " SIZE_FORMAT "K, used " SIZE_FORMAT "K", |
3263
23d2d46c6d08
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
3262
diff
changeset
|
3541 |
capacity()/K, used_unlocked()/K); |
3191
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3542 |
st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3543 |
_g1_storage.low_boundary(), |
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3544 |
_g1_storage.high(), |
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3545 |
_g1_storage.high_boundary()); |
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3546 |
st->cr(); |
10677
370a8da2d63f
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
10674
diff
changeset
|
3547 |
st->print(" region size " SIZE_FORMAT "K, ", HeapRegion::GrainBytes / K); |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3548 |
uint young_regions = _young_list->length(); |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3549 |
st->print("%u young (" SIZE_FORMAT "K), ", young_regions, |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3550 |
(size_t) young_regions * HeapRegion::GrainBytes / K); |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3551 |
uint survivor_regions = g1_policy()->recorded_survivor_regions(); |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3552 |
st->print("%u survivors (" SIZE_FORMAT "K)", survivor_regions, |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3553 |
(size_t) survivor_regions * HeapRegion::GrainBytes / K); |
3191
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3554 |
st->cr(); |
14074
8cafb11da0cd
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
13926
diff
changeset
|
3555 |
MetaspaceAux::print_on(st); |
10997
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10996
diff
changeset
|
3556 |
} |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10996
diff
changeset
|
3557 |
|
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10996
diff
changeset
|
3558 |
void G1CollectedHeap::print_extended_on(outputStream* st) const { |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10996
diff
changeset
|
3559 |
print_on(st); |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10996
diff
changeset
|
3560 |
|
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10996
diff
changeset
|
3561 |
// Print the per-region information. |
0be4b3be7197
7099849: G1: include heap region information in hs_err files
tonyp
parents:
10996
diff
changeset
|
3562 |
st->cr(); |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3563 |
st->print_cr("Heap Regions: (Y=young(eden), SU=young(survivor), " |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3564 |
"HS=humongous(starts), HC=humongous(continues), " |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3565 |
"CS=collection set, F=free, TS=gc time stamp, " |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3566 |
"PTAMS=previous top-at-mark-start, " |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3567 |
"NTAMS=next top-at-mark-start)"); |
1374 | 3568 |
PrintRegionClosure blk(st); |
9989 | 3569 |
heap_region_iterate(&blk); |
1374 | 3570 |
} |
3571 |
||
16685
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16606
diff
changeset
|
3572 |
void G1CollectedHeap::print_on_error(outputStream* st) const { |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16606
diff
changeset
|
3573 |
this->CollectedHeap::print_on_error(st); |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16606
diff
changeset
|
3574 |
|
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16606
diff
changeset
|
3575 |
if (_cm != NULL) { |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16606
diff
changeset
|
3576 |
st->cr(); |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16606
diff
changeset
|
3577 |
_cm->print_on_error(st); |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16606
diff
changeset
|
3578 |
} |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16606
diff
changeset
|
3579 |
} |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16606
diff
changeset
|
3580 |
|
1374 | 3581 |
void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
6425
diff
changeset
|
3582 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
4022 | 3583 |
workers()->print_worker_threads_on(st); |
3584 |
} |
|
3585 |
_cmThread->print_on(st); |
|
1374 | 3586 |
st->cr(); |
4022 | 3587 |
_cm->print_worker_threads_on(st); |
3588 |
_cg1r->print_worker_threads_on(st); |
|
1374 | 3589 |
} |
3590 |
||
3591 |
void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { |
|
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
6425
diff
changeset
|
3592 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
1374 | 3593 |
workers()->threads_do(tc); |
3594 |
} |
|
3595 |
tc->do_thread(_cmThread); |
|
2881 | 3596 |
_cg1r->threads_do(tc); |
1374 | 3597 |
} |
3598 |
||
3599 |
void G1CollectedHeap::print_tracing_info() const { |
|
3600 |
// We'll overload this to mean "trace GC pause statistics." |
|
3601 |
if (TraceGen0Time || TraceGen1Time) { |
|
3602 |
// The "G1CollectorPolicy" is keeping track of these stats, so delegate |
|
3603 |
// to that. |
|
3604 |
g1_policy()->print_tracing_info(); |
|
3605 |
} |
|
2741 | 3606 |
if (G1SummarizeRSetStats) { |
1374 | 3607 |
g1_rem_set()->print_summary_info(); |
3608 |
} |
|
5033 | 3609 |
if (G1SummarizeConcMark) { |
1374 | 3610 |
concurrent_mark()->print_summary_info(); |
3611 |
} |
|
3612 |
g1_policy()->print_yg_surv_rate_info(); |
|
3613 |
SpecializationStats::print(); |
|
3614 |
} |
|
3615 |
||
10000
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3616 |
#ifndef PRODUCT |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3617 |
// Helpful for debugging RSet issues. |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3618 |
|
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3619 |
class PrintRSetsClosure : public HeapRegionClosure { |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3620 |
private: |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3621 |
const char* _msg; |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3622 |
size_t _occupied_sum; |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3623 |
|
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3624 |
public: |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3625 |
bool doHeapRegion(HeapRegion* r) { |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3626 |
HeapRegionRemSet* hrrs = r->rem_set(); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3627 |
size_t occupied = hrrs->occupied(); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3628 |
_occupied_sum += occupied; |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3629 |
|
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3630 |
gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3631 |
HR_FORMAT_PARAMS(r)); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3632 |
if (occupied == 0) { |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3633 |
gclog_or_tty->print_cr(" RSet is empty"); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3634 |
} else { |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3635 |
hrrs->print(); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3636 |
} |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3637 |
gclog_or_tty->print_cr("----------"); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3638 |
return false; |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3639 |
} |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3640 |
|
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3641 |
PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3642 |
gclog_or_tty->cr(); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3643 |
gclog_or_tty->print_cr("========================================"); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3644 |
gclog_or_tty->print_cr(msg); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3645 |
gclog_or_tty->cr(); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3646 |
} |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3647 |
|
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3648 |
~PrintRSetsClosure() { |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3649 |
gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3650 |
gclog_or_tty->print_cr("========================================"); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3651 |
gclog_or_tty->cr(); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3652 |
} |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3653 |
}; |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3654 |
|
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3655 |
void G1CollectedHeap::print_cset_rsets() { |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3656 |
PrintRSetsClosure cl("Printing CSet RSets"); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3657 |
collection_set_iterate(&cl); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3658 |
} |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3659 |
|
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3660 |
void G1CollectedHeap::print_all_rsets() { |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3661 |
PrintRSetsClosure cl("Printing All RSets");; |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3662 |
heap_region_iterate(&cl); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3663 |
} |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3664 |
#endif // PRODUCT |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3665 |
|
1374 | 3666 |
G1CollectedHeap* G1CollectedHeap::heap() { |
3667 |
assert(_sh->kind() == CollectedHeap::G1CollectedHeap, |
|
3668 |
"not a garbage-first heap"); |
|
3669 |
return _g1h; |
|
3670 |
} |
|
3671 |
||
3672 |
void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { |
|
4886
a2f9a66475b3
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
4637
diff
changeset
|
3673 |
// always_do_update_barrier = false; |
1374 | 3674 |
assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
3675 |
// Fill TLAB's and such |
|
3676 |
ensure_parsability(true); |
|
20305
af013cf4a5e6
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
20083
diff
changeset
|
3677 |
|
af013cf4a5e6
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
20083
diff
changeset
|
3678 |
if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
af013cf4a5e6
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
20083
diff
changeset
|
3679 |
(total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
af013cf4a5e6
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
20083
diff
changeset
|
3680 |
g1_rem_set()->print_periodic_summary_info("Before GC RS summary"); |
af013cf4a5e6
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
20083
diff
changeset
|
3681 |
} |
1374 | 3682 |
} |
3683 |
||
3684 |
void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { |
|
17854
d65bc1546091
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
17625
diff
changeset
|
3685 |
|
d65bc1546091
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
17625
diff
changeset
|
3686 |
if (G1SummarizeRSetStats && |
d65bc1546091
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
17625
diff
changeset
|
3687 |
(G1SummarizeRSetStatsPeriod > 0) && |
d65bc1546091
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
17625
diff
changeset
|
3688 |
// we are at the end of the GC. Total collections has already been increased. |
d65bc1546091
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
17625
diff
changeset
|
3689 |
((total_collections() - 1) % G1SummarizeRSetStatsPeriod == 0)) { |
20305
af013cf4a5e6
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
20083
diff
changeset
|
3690 |
g1_rem_set()->print_periodic_summary_info("After GC RS summary"); |
17854
d65bc1546091
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
17625
diff
changeset
|
3691 |
} |
d65bc1546091
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
17625
diff
changeset
|
3692 |
|
1374 | 3693 |
// FIXME: what is this about? |
3694 |
// I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" |
|
3695 |
// is set. |
|
3696 |
COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), |
|
3697 |
"derived pointer present")); |
|
4886
a2f9a66475b3
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
4637
diff
changeset
|
3698 |
// always_do_update_barrier = true; |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3699 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3700 |
// We have just completed a GC. Update the soft reference |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3701 |
// policy with the new heap occupancy |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3702 |
Universe::update_heap_info_at_gc(); |
1374 | 3703 |
} |
3704 |
||
7398 | 3705 |
HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
3706 |
unsigned int gc_count_before, |
|
19549
60e5c7cafdca
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
19341
diff
changeset
|
3707 |
bool* succeeded, |
60e5c7cafdca
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
19341
diff
changeset
|
3708 |
GCCause::Cause gc_cause) { |
7398 | 3709 |
assert_heap_not_locked_and_not_at_safepoint(); |
1374 | 3710 |
g1_policy()->record_stop_world_start(); |
7398 | 3711 |
VM_G1IncCollectionPause op(gc_count_before, |
3712 |
word_size, |
|
3713 |
false, /* should_initiate_conc_mark */ |
|
3714 |
g1_policy()->max_pause_time_ms(), |
|
19549
60e5c7cafdca
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
19341
diff
changeset
|
3715 |
gc_cause); |
7398 | 3716 |
VMThread::execute(&op); |
3717 |
||
3718 |
HeapWord* result = op.result(); |
|
3719 |
bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); |
|
3720 |
assert(result == NULL || ret_succeeded, |
|
3721 |
"the result should be NULL if the VM did not succeed"); |
|
3722 |
*succeeded = ret_succeeded; |
|
3723 |
||
3724 |
assert_heap_not_locked(); |
|
3725 |
return result; |
|
1374 | 3726 |
} |
3727 |
||
3728 |
void |
|
3729 |
G1CollectedHeap::doConcurrentMark() { |
|
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
3730 |
MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag); |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
3731 |
if (!_cmThread->in_progress()) { |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
3732 |
_cmThread->set_started(); |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
3733 |
CGC_lock->notify(); |
1374 | 3734 |
} |
3735 |
} |
|
3736 |
||
3737 |
size_t G1CollectedHeap::pending_card_num() { |
|
3738 |
size_t extra_cards = 0; |
|
3739 |
JavaThread *curr = Threads::first(); |
|
3740 |
while (curr != NULL) { |
|
3741 |
DirtyCardQueue& dcq = curr->dirty_card_queue(); |
|
3742 |
extra_cards += dcq.size(); |
|
3743 |
curr = curr->next(); |
|
3744 |
} |
|
3745 |
DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
|
3746 |
size_t buffer_size = dcqs.buffer_size(); |
|
3747 |
size_t buffer_num = dcqs.completed_buffers_num(); |
|
13482 | 3748 |
|
3749 |
// PtrQueueSet::buffer_size() and PtrQueue:size() return sizes |
|
3750 |
// in bytes - not the number of 'entries'. We need to convert |
|
3751 |
// into a number of cards. |
|
3752 |
return (buffer_size * buffer_num + extra_cards) / oopSize; |
|
1374 | 3753 |
} |
3754 |
||
3755 |
size_t G1CollectedHeap::cards_scanned() { |
|
6958 | 3756 |
return g1_rem_set()->cardsScanned(); |
1374 | 3757 |
} |
3758 |
||
3759 |
void |
|
3760 |
G1CollectedHeap::setup_surviving_young_words() { |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3761 |
assert(_surviving_young_words == NULL, "pre-condition"); |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3762 |
uint array_length = g1_policy()->young_cset_region_length(); |
13195 | 3763 |
_surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
1374 | 3764 |
if (_surviving_young_words == NULL) { |
17087
f0b76c4c93a0
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
16994
diff
changeset
|
3765 |
vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
1374 | 3766 |
"Not enough space for young surv words summary."); |
3767 |
} |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3768 |
memset(_surviving_young_words, 0, (size_t) array_length * sizeof(size_t)); |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
3769 |
#ifdef ASSERT |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3770 |
for (uint i = 0; i < array_length; ++i) { |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
3771 |
assert( _surviving_young_words[i] == 0, "memset above" ); |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
3772 |
} |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
3773 |
#endif // !ASSERT |
1374 | 3774 |
} |
3775 |
||
3776 |
void |
|
3777 |
G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { |
|
3778 |
MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3779 |
uint array_length = g1_policy()->young_cset_region_length(); |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3780 |
for (uint i = 0; i < array_length; ++i) { |
1374 | 3781 |
_surviving_young_words[i] += surv_young_words[i]; |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3782 |
} |
1374 | 3783 |
} |
3784 |
||
3785 |
void |
|
3786 |
G1CollectedHeap::cleanup_surviving_young_words() { |
|
3787 |
guarantee( _surviving_young_words != NULL, "pre-condition" ); |
|
13195 | 3788 |
FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
1374 | 3789 |
_surviving_young_words = NULL; |
3790 |
} |
|
3791 |
||
10000
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3792 |
#ifdef ASSERT |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3793 |
class VerifyCSetClosure: public HeapRegionClosure { |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3794 |
public: |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3795 |
bool doHeapRegion(HeapRegion* hr) { |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3796 |
// Here we check that the CSet region's RSet is ready for parallel |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3797 |
// iteration. The fields that we'll verify are only manipulated |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3798 |
// when the region is part of a CSet and is collected. Afterwards, |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3799 |
// we reset these fields when we clear the region's RSet (when the |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3800 |
// region is freed) so they are ready when the region is |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3801 |
// re-allocated. The only exception to this is if there's an |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3802 |
// evacuation failure and instead of freeing the region we leave |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3803 |
// it in the heap. In that case, we reset these fields during |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3804 |
// evacuation failure handling. |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3805 |
guarantee(hr->rem_set()->verify_ready_for_par_iteration(), "verification"); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3806 |
|
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3807 |
// Here's a good place to add any other checks we'd like to |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3808 |
// perform on CSet regions. |
4902
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4886
diff
changeset
|
3809 |
return false; |
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4886
diff
changeset
|
3810 |
} |
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4886
diff
changeset
|
3811 |
}; |
10000
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
3812 |
#endif // ASSERT |
4902
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4886
diff
changeset
|
3813 |
|
6251 | 3814 |
#if TASKQUEUE_STATS |
3815 |
void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { |
|
3816 |
st->print_raw_cr("GC Task Stats"); |
|
3817 |
st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); |
|
3818 |
st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); |
|
3819 |
} |
|
3820 |
||
3821 |
void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { |
|
3822 |
print_taskqueue_stats_hdr(st); |
|
3823 |
||
3824 |
TaskQueueStats totals; |
|
6425
206fd9fee2cf
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
6261
diff
changeset
|
3825 |
const int n = workers() != NULL ? workers()->total_workers() : 1; |
6251 | 3826 |
for (int i = 0; i < n; ++i) { |
3827 |
st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); |
|
3828 |
totals += task_queue(i)->stats; |
|
3829 |
} |
|
3830 |
st->print_raw("tot "); totals.print(st); st->cr(); |
|
3831 |
||
3832 |
DEBUG_ONLY(totals.verify()); |
|
3833 |
} |
|
3834 |
||
3835 |
void G1CollectedHeap::reset_taskqueue_stats() { |
|
6425
206fd9fee2cf
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
6261
diff
changeset
|
3836 |
const int n = workers() != NULL ? workers()->total_workers() : 1; |
6251 | 3837 |
for (int i = 0; i < n; ++i) { |
3838 |
task_queue(i)->stats.reset(); |
|
3839 |
} |
|
3840 |
} |
|
3841 |
#endif // TASKQUEUE_STATS |
|
3842 |
||
13754
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3843 |
void G1CollectedHeap::log_gc_header() { |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3844 |
if (!G1Log::fine()) { |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3845 |
return; |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3846 |
} |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3847 |
|
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3848 |
gclog_or_tty->date_stamp(PrintGCDateStamps); |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3849 |
gclog_or_tty->stamp(PrintGCTimeStamps); |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3850 |
|
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3851 |
GCCauseString gc_cause_str = GCCauseString("GC pause", gc_cause()) |
15095
8ce5dcdbeb26
8005672: Clean up some changes to GC logging with GCCause's
jmasa
parents:
14740
diff
changeset
|
3852 |
.append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
13754
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3853 |
.append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3854 |
|
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3855 |
gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3856 |
} |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3857 |
|
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3858 |
void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3859 |
if (!G1Log::fine()) { |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3860 |
return; |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3861 |
} |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3862 |
|
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3863 |
if (G1Log::finer()) { |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3864 |
if (evacuation_failed()) { |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3865 |
gclog_or_tty->print(" (to-space exhausted)"); |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3866 |
} |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3867 |
gclog_or_tty->print_cr(", %3.7f secs]", pause_time_sec); |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3868 |
g1_policy()->phase_times()->note_gc_end(); |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3869 |
g1_policy()->phase_times()->print(pause_time_sec); |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3870 |
g1_policy()->print_detailed_heap_transition(); |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3871 |
} else { |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3872 |
if (evacuation_failed()) { |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3873 |
gclog_or_tty->print("--"); |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3874 |
} |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3875 |
g1_policy()->print_heap_transition(); |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3876 |
gclog_or_tty->print_cr(", %3.7f secs]", pause_time_sec); |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3877 |
} |
14634
fdd9909928ae
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
14074
diff
changeset
|
3878 |
gclog_or_tty->flush(); |
13754
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3879 |
} |
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3880 |
|
7398 | 3881 |
bool |
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
3882 |
G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
7923 | 3883 |
assert_at_safepoint(true /* should_be_vm_thread */); |
3884 |
guarantee(!is_gc_active(), "collection is not reentrant"); |
|
3885 |
||
5243
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5078
diff
changeset
|
3886 |
if (GC_locker::check_active_before_gc()) { |
7398 | 3887 |
return false; |
5243
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5078
diff
changeset
|
3888 |
} |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5078
diff
changeset
|
3889 |
|
18025 | 3890 |
_gc_timer_stw->register_gc_start(os::elapsed_counter()); |
3891 |
||
3892 |
_gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); |
|
3893 |
||
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7659
diff
changeset
|
3894 |
SvcGCMarker sgcm(SvcGCMarker::MINOR); |
7659
1d92613a1e8a
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
7658
diff
changeset
|
3895 |
ResourceMark rm; |
1d92613a1e8a
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
7658
diff
changeset
|
3896 |
|
11636
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11455
diff
changeset
|
3897 |
print_heap_before_gc(); |
18025 | 3898 |
trace_heap_before_gc(_gc_tracer_stw); |
3191
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3899 |
|
10996 | 3900 |
HRSPhaseSetter x(HRSPhaseEvacuation); |
7923 | 3901 |
verify_region_sets_optional(); |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
3902 |
verify_dirty_young_regions(); |
7923 | 3903 |
|
11578
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3904 |
// This call will decide whether this pause is an initial-mark |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3905 |
// pause. If it is, during_initial_mark_pause() will return true |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3906 |
// for the duration of this pause. |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3907 |
g1_policy()->decide_on_conc_mark_initiation(); |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3908 |
|
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3909 |
// We do not allow initial-mark to be piggy-backed on a mixed GC. |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3910 |
assert(!g1_policy()->during_initial_mark_pause() || |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3911 |
g1_policy()->gcs_are_young(), "sanity"); |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3912 |
|
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3913 |
// We also do not allow mixed GCs during marking. |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3914 |
assert(!mark_in_progress() || g1_policy()->gcs_are_young(), "sanity"); |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3915 |
|
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3916 |
// Record whether this pause is an initial mark. When the current |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3917 |
// thread has completed its logging output and it's safe to signal |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3918 |
// the CM thread, the flag's value in the policy has been reset. |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3919 |
bool should_start_conc_mark = g1_policy()->during_initial_mark_pause(); |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3920 |
|
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
3921 |
// Inner scope for scope based logging, timers, and stats collection |
3191
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3922 |
{ |
18025 | 3923 |
EvacuationInfo evacuation_info; |
3924 |
||
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
3925 |
if (g1_policy()->during_initial_mark_pause()) { |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
3926 |
// We are about to start a marking cycle, so we increment the |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
3927 |
// full collection counter. |
12934
f9bc0e664918
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
12781
diff
changeset
|
3928 |
increment_old_marking_cycles_started(); |
18025 | 3929 |
register_concurrent_cycle_start(_gc_timer_stw->gc_start()); |
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
3930 |
} |
18025 | 3931 |
|
3932 |
_gc_tracer_stw->report_yc_type(yc_type()); |
|
3933 |
||
12378
ed44b9ecfa2f
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
12271
diff
changeset
|
3934 |
TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
12511 | 3935 |
|
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
3936 |
int active_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
3937 |
workers()->active_workers() : 1); |
13516
f7adc27fb367
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
13482
diff
changeset
|
3938 |
double pause_start_sec = os::elapsedTime(); |
f7adc27fb367
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
13482
diff
changeset
|
3939 |
g1_policy()->phase_times()->note_gc_start(active_workers); |
13754
81163e1274d7
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
13728
diff
changeset
|
3940 |
log_gc_header(); |
3191
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3941 |
|
9338
05ee447bd420
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
9334
diff
changeset
|
3942 |
TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
9623
151c0b638488
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
9424
diff
changeset
|
3943 |
TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
4459
eb506d590394
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
4458
diff
changeset
|
3944 |
|
8680 | 3945 |
// If the secondary_free_list is not empty, append it to the |
3946 |
// free_list. No need to wait for the cleanup operation to finish; |
|
3947 |
// the region allocation code will check the secondary_free_list |
|
3948 |
// and wait if necessary. If the G1StressConcRegionFreeing flag is |
|
3949 |
// set, skip this step so that the region allocation code has to |
|
3950 |
// get entries from the secondary_free_list. |
|
7923 | 3951 |
if (!G1StressConcRegionFreeing) { |
8680 | 3952 |
append_secondary_free_list_if_not_empty_with_lock(); |
7923 | 3953 |
} |
3191
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3954 |
|
19339 | 3955 |
assert(check_young_list_well_formed(), "young list should be well formed"); |
3956 |
assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), |
|
3957 |
"sanity check"); |
|
3191
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3958 |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
3959 |
// Don't dynamically change the number of GC threads this early. A value of |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
3960 |
// 0 is used to indicate serial work. When parallel work is done, |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
3961 |
// it will be set. |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
3962 |
|
3191
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3963 |
{ // Call to jvmpi::post_class_unload_events must occur outside of active GC |
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3964 |
IsGCActiveMark x; |
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3965 |
|
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3966 |
gc_prologue(false); |
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3967 |
increment_total_collections(false /* full gc */); |
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
3968 |
increment_gc_time_stamp(); |
1374 | 3969 |
|
13516
f7adc27fb367
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
13482
diff
changeset
|
3970 |
verify_before_gc(); |
3191
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3971 |
|
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3972 |
COMPILER2_PRESENT(DerivedPointerTable::clear()); |
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
3973 |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3974 |
// Please see comment in g1CollectedHeap.hpp and |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3975 |
// G1CollectedHeap::ref_processing_init() to see how |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3976 |
// reference processing currently works in G1. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3977 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3978 |
// Enable discovery in the STW reference processor |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3979 |
ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3980 |
true /*verify_no_refs*/); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3981 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3982 |
{ |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3983 |
// We want to temporarily turn off discovery by the |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3984 |
// CM ref processor, if necessary, and turn it back on |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3985 |
// on again later if we do. Using a scoped |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3986 |
// NoRefDiscovery object will do this. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3987 |
NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3988 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3989 |
// Forget the current alloc region (we might even choose it to be part |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3990 |
// of the collection set!). |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3991 |
release_mutator_alloc_region(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3992 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3993 |
// We should call this after we retire the mutator alloc |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3994 |
// region(s) so that all the ALLOC / RETIRE events are generated |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3995 |
// before the start GC event. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3996 |
_hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
3997 |
|
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
3998 |
// This timing is only used by the ergonomics to handle our pause target. |
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
3999 |
// It is unclear why this should not include the full pause. We will |
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
4000 |
// investigate this in CR 7178365. |
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
4001 |
// |
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
4002 |
// Preserving the old comment here if that helps the investigation: |
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
4003 |
// |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4004 |
// The elapsed time induced by the start time below deliberately elides |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4005 |
// the possible verification above. |
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
4006 |
double sample_start_time_sec = os::elapsedTime(); |
3191
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
4007 |
|
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
4008 |
#if YOUNG_LIST_VERBOSE |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4009 |
gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4010 |
_young_list->print(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4011 |
g1_policy()->print_collection_set(g1_policy()->inc_cset_head(), gclog_or_tty); |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
4012 |
#endif // YOUNG_LIST_VERBOSE |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
4013 |
|
16993
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
16606
diff
changeset
|
4014 |
g1_policy()->record_collection_pause_start(sample_start_time_sec); |
3191
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
4015 |
|
11584
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
4016 |
double scan_wait_start = os::elapsedTime(); |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
4017 |
// We have to wait until the CM threads finish scanning the |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
4018 |
// root regions as it's the only way to ensure that all the |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
4019 |
// objects on them have been correctly scanned before we start |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
4020 |
// moving them during the GC. |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
4021 |
bool waited = _cm->root_regions()->wait_until_scan_finished(); |
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
4022 |
double wait_time_ms = 0.0; |
11584
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
4023 |
if (waited) { |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
4024 |
double scan_wait_end = os::elapsedTime(); |
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
4025 |
wait_time_ms = (scan_wait_end - scan_wait_start) * 1000.0; |
11584
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
4026 |
} |
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
4027 |
g1_policy()->phase_times()->record_root_region_scan_wait_time(wait_time_ms); |
11584
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
4028 |
|
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
4029 |
#if YOUNG_LIST_VERBOSE |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4030 |
gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4031 |
_young_list->print(); |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
4032 |
#endif // YOUNG_LIST_VERBOSE |
1374 | 4033 |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4034 |
if (g1_policy()->during_initial_mark_pause()) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4035 |
concurrent_mark()->checkpointRootsInitialPre(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4036 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4037 |
|
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
4038 |
#if YOUNG_LIST_VERBOSE |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4039 |
gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4040 |
_young_list->print(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4041 |
g1_policy()->print_collection_set(g1_policy()->inc_cset_head(), gclog_or_tty); |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
4042 |
#endif // YOUNG_LIST_VERBOSE |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
4043 |
|
18025 | 4044 |
g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4045 |
|
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4046 |
_cm->note_start_of_gc(); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4047 |
// We should not verify the per-thread SATB buffers given that |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4048 |
// we have not filtered them yet (we'll do so during the |
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11754
diff
changeset
|
4049 |
// GC). We also call this after finalize_cset() to |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4050 |
// ensure that the CSet has been finalized. |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4051 |
_cm->verify_no_cset_oops(true /* verify_stacks */, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4052 |
true /* verify_enqueued_buffers */, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4053 |
false /* verify_thread_buffers */, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4054 |
true /* verify_fingers */); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4055 |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4056 |
if (_hr_printer.is_active()) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4057 |
HeapRegion* hr = g1_policy()->collection_set(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4058 |
while (hr != NULL) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4059 |
G1HRPrinter::RegionType type; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4060 |
if (!hr->is_young()) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4061 |
type = G1HRPrinter::Old; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4062 |
} else if (hr->is_survivor()) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4063 |
type = G1HRPrinter::Survivor; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4064 |
} else { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4065 |
type = G1HRPrinter::Eden; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4066 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4067 |
_hr_printer.cset(hr); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4068 |
hr = hr->next_in_collection_set(); |
10001
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
4069 |
} |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
4070 |
} |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4071 |
|
10000
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
4072 |
#ifdef ASSERT |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4073 |
VerifyCSetClosure cl; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4074 |
collection_set_iterate(&cl); |
10000
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9997
diff
changeset
|
4075 |
#endif // ASSERT |
6249 | 4076 |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4077 |
setup_surviving_young_words(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4078 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4079 |
// Initialize the GC alloc regions. |
18025 | 4080 |
init_gc_alloc_regions(evacuation_info); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4081 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4082 |
// Actually do the work... |
18025 | 4083 |
evacuate_collection_set(evacuation_info); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4084 |
|
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4085 |
// We do this to mainly verify the per-thread SATB buffers |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4086 |
// (which have been filtered by now) since we didn't verify |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4087 |
// them earlier. No point in re-checking the stacks / enqueued |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4088 |
// buffers given that the CSet has not changed since last time |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4089 |
// we checked. |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4090 |
_cm->verify_no_cset_oops(false /* verify_stacks */, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4091 |
false /* verify_enqueued_buffers */, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4092 |
true /* verify_thread_buffers */, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4093 |
true /* verify_fingers */); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4094 |
|
18025 | 4095 |
free_collection_set(g1_policy()->collection_set(), evacuation_info); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4096 |
g1_policy()->clear_collection_set(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4097 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4098 |
cleanup_surviving_young_words(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4099 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4100 |
// Start a new incremental collection set for the next pause. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4101 |
g1_policy()->start_incremental_cset_building(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4102 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4103 |
// Clear the _cset_fast_test bitmap in anticipation of adding |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4104 |
// regions to the incremental collection set for the next |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4105 |
// evacuation pause. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4106 |
clear_cset_fast_test(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4107 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4108 |
_young_list->reset_sampled_info(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4109 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4110 |
// Don't check the whole heap at this point as the |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4111 |
// GC alloc regions from this pause have been tagged |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4112 |
// as survivors and moved on to the survivor list. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4113 |
// Survivor regions will fail the !is_young() check. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4114 |
assert(check_young_list_empty(false /* check_heap */), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4115 |
"young list should be empty"); |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
4116 |
|
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
4117 |
#if YOUNG_LIST_VERBOSE |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4118 |
gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4119 |
_young_list->print(); |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
4120 |
#endif // YOUNG_LIST_VERBOSE |
1374 | 4121 |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4122 |
g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
18025 | 4123 |
_young_list->first_survivor_region(), |
4124 |
_young_list->last_survivor_region()); |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4125 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4126 |
_young_list->reset_auxilary_lists(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4127 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4128 |
if (evacuation_failed()) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4129 |
_summary_bytes_used = recalculate_used(); |
18025 | 4130 |
uint n_queues = MAX2((int)ParallelGCThreads, 1); |
4131 |
for (uint i = 0; i < n_queues; i++) { |
|
4132 |
if (_evacuation_failed_info_array[i].has_failed()) { |
|
4133 |
_gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); |
|
4134 |
} |
|
4135 |
} |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4136 |
} else { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4137 |
// The "used" of the the collection set have already been subtracted |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4138 |
// when they were freed. Add in the bytes evacuated. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4139 |
_summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4140 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4141 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4142 |
if (g1_policy()->during_initial_mark_pause()) { |
11584
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
4143 |
// We have to do this before we notify the CM threads that |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
4144 |
// they can start working to make sure that all the |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
4145 |
// appropriate initialization is done on the CM object. |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4146 |
concurrent_mark()->checkpointRootsInitialPost(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4147 |
set_marking_started(); |
11578
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4148 |
// Note that we don't actually trigger the CM thread at |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4149 |
// this point. We do that later when we're sure that |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4150 |
// the current thread has completed its logging output. |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4151 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4152 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4153 |
allocate_dummy_regions(); |
9334
640f1a6f0b85
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
8928
diff
changeset
|
4154 |
|
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
4155 |
#if YOUNG_LIST_VERBOSE |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4156 |
gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4157 |
_young_list->print(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4158 |
g1_policy()->print_collection_set(g1_policy()->inc_cset_head(), gclog_or_tty); |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
4159 |
#endif // YOUNG_LIST_VERBOSE |
1374 | 4160 |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4161 |
init_mutator_alloc_region(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4162 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4163 |
{ |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4164 |
size_t expand_bytes = g1_policy()->expansion_amount(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4165 |
if (expand_bytes > 0) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4166 |
size_t bytes_before = capacity(); |
11453 | 4167 |
// No need for an ergo verbose message here, |
4168 |
// expansion_amount() does this when it returns a value > 0. |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4169 |
if (!expand(expand_bytes)) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4170 |
// We failed to expand the heap so let's verify that |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4171 |
// committed/uncommitted amount match the backing store |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4172 |
assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4173 |
assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4174 |
} |
10529
9d5bbffbb322
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
10528
diff
changeset
|
4175 |
} |
9d5bbffbb322
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
10528
diff
changeset
|
4176 |
} |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4177 |
|
18025 | 4178 |
// We redo the verification but now wrt to the new CSet which |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4179 |
// has just got initialized after the previous CSet was freed. |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4180 |
_cm->verify_no_cset_oops(true /* verify_stacks */, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4181 |
true /* verify_enqueued_buffers */, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4182 |
true /* verify_thread_buffers */, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4183 |
true /* verify_fingers */); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4184 |
_cm->note_end_of_gc(); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4185 |
|
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
4186 |
// This timing is only used by the ergonomics to handle our pause target. |
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
4187 |
// It is unclear why this should not include the full pause. We will |
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
4188 |
// investigate this in CR 7178365. |
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
4189 |
double sample_end_time_sec = os::elapsedTime(); |
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
4190 |
double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
18025 | 4191 |
g1_policy()->record_collection_pause_end(pause_time_ms, evacuation_info); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4192 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4193 |
MemoryService::track_memory_usage(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4194 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4195 |
// In prepare_for_verify() below we'll need to scan the deferred |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4196 |
// update buffers to bring the RSets up-to-date if |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4197 |
// G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4198 |
// the update buffers we'll probably need to scan cards on the |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4199 |
// regions we just allocated to (i.e., the GC alloc |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4200 |
// regions). However, during the last GC we called |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4201 |
// set_saved_mark() on all the GC alloc regions, so card |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4202 |
// scanning might skip the [saved_mark_word()...top()] area of |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4203 |
// those regions (i.e., the area we allocated objects into |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4204 |
// during the last GC). But it shouldn't. Given that |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4205 |
// saved_mark_word() is conditional on whether the GC time stamp |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4206 |
// on the region is current or not, by incrementing the GC time |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4207 |
// stamp here we invalidate all the GC time stamps on all the |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4208 |
// regions and saved_mark_word() will simply return top() for |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4209 |
// all the regions. This is a nicer way of ensuring this rather |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4210 |
// than iterating over the regions and fixing them. In fact, the |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4211 |
// GC time stamp increment here also ensures that |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4212 |
// saved_mark_word() will return top() between pauses, i.e., |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4213 |
// during concurrent refinement. So we don't need the |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4214 |
// is_gc_active() check to decided which top to use when |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4215 |
// scanning cards (see CR 7039627). |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4216 |
increment_gc_time_stamp(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4217 |
|
13516
f7adc27fb367
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
13482
diff
changeset
|
4218 |
verify_after_gc(); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4219 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4220 |
assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4221 |
ref_processor_stw()->verify_no_references_recorded(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4222 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4223 |
// CM reference discovery will be re-enabled if necessary. |
10529
9d5bbffbb322
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
10528
diff
changeset
|
4224 |
} |
9d5bbffbb322
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
10528
diff
changeset
|
4225 |
|
10001
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
4226 |
// We should do this after we potentially expand the heap so |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
4227 |
// that all the COMMIT events are generated before the end GC |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
4228 |
// event, and after we retire the GC alloc regions so that all |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
4229 |
// RETIRE events are generated before the end GC event. |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
4230 |
_hr_printer.end_gc(false /* full */, (size_t) total_collections()); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
4231 |
|
3191
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
4232 |
if (mark_in_progress()) { |
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
4233 |
concurrent_mark()->update_g1_committed(); |
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
4234 |
} |
2010
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
2009
diff
changeset
|
4235 |
|
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
2009
diff
changeset
|
4236 |
#ifdef TRACESPINNING |
3191
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
4237 |
ParallelTaskTerminator::print_termination_counts(); |
2010
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
2009
diff
changeset
|
4238 |
#endif |
1374 | 4239 |
|
3191
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
4240 |
gc_epilogue(false); |
dd3cc90b9951
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
3000
diff
changeset
|
4241 |
} |
12935
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4242 |
|
14634
fdd9909928ae
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
14074
diff
changeset
|
4243 |
// Print the remainder of the GC log output. |
fdd9909928ae
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
14074
diff
changeset
|
4244 |
log_gc_footer(os::elapsedTime() - pause_start_sec); |
fdd9909928ae
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
14074
diff
changeset
|
4245 |
|
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
4246 |
// It is not yet to safe to tell the concurrent mark to |
12935
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4247 |
// start as we have some optional output below. We don't want the |
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4248 |
// output from the concurrent mark thread interfering with this |
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4249 |
// logging output either. |
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4250 |
|
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4251 |
_hrs.verify_optional(); |
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4252 |
verify_region_sets_optional(); |
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4253 |
|
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4254 |
TASKQUEUE_STATS_ONLY(if (ParallelGCVerbose) print_taskqueue_stats()); |
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4255 |
TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4256 |
|
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4257 |
print_heap_after_gc(); |
18025 | 4258 |
trace_heap_after_gc(_gc_tracer_stw); |
12935
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4259 |
|
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4260 |
// We must call G1MonitoringSupport::update_sizes() in the same scoping level |
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4261 |
// as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4262 |
// TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4263 |
// before any GC notifications are raised. |
2ae81fce3911
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
12934
diff
changeset
|
4264 |
g1mm()->update_sizes(); |
18025 | 4265 |
|
4266 |
_gc_tracer_stw->report_evacuation_info(&evacuation_info); |
|
4267 |
_gc_tracer_stw->report_tenuring_threshold(_g1_policy->tenuring_threshold()); |
|
4268 |
_gc_timer_stw->register_gc_end(os::elapsed_counter()); |
|
4269 |
_gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
|
4270 |
} |
|
11578
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4271 |
// It should now be safe to tell the concurrent mark thread to start |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4272 |
// without its logging output interfering with the logging output |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4273 |
// that came from the pause. |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4274 |
|
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4275 |
if (should_start_conc_mark) { |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4276 |
// CAUTION: after the doConcurrentMark() call below, |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4277 |
// the concurrent marking thread(s) could be running |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4278 |
// concurrently with us. Make sure that anything after |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4279 |
// this point does not assume that we are the only GC thread |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4280 |
// running. Note: of course, the actual marking work will |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4281 |
// not start until the safepoint itself is released in |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4282 |
// ConcurrentGCThread::safepoint_desynchronize(). |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4283 |
doConcurrentMark(); |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4284 |
} |
fc6f77eca886
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
11576
diff
changeset
|
4285 |
|
7398 | 4286 |
return true; |
1374 | 4287 |
} |
4288 |
||
5347
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4289 |
size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4290 |
{ |
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4291 |
size_t gclab_word_size; |
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4292 |
switch (purpose) { |
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4293 |
case GCAllocForSurvived: |
13466 | 4294 |
gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
5347
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4295 |
break; |
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4296 |
case GCAllocForTenured: |
13466 | 4297 |
gclab_word_size = _old_plab_stats.desired_plab_sz(); |
5347
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4298 |
break; |
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4299 |
default: |
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4300 |
assert(false, "unknown GCAllocPurpose"); |
13466 | 4301 |
gclab_word_size = _old_plab_stats.desired_plab_sz(); |
5347
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4302 |
break; |
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4303 |
} |
13466 | 4304 |
|
4305 |
// Prevent humongous PLAB sizes for two reasons: |
|
4306 |
// * PLABs are allocated using a similar paths as oops, but should |
|
4307 |
// never be in a humongous region |
|
4308 |
// * Allowing humongous PLABs needlessly churns the region free lists |
|
4309 |
return MIN2(_humongous_object_threshold_in_words, gclab_word_size); |
|
5347
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4310 |
} |
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4311 |
|
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
4312 |
void G1CollectedHeap::init_mutator_alloc_region() { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
4313 |
assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
4314 |
_mutator_alloc_region.init(); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
4315 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
4316 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
4317 |
void G1CollectedHeap::release_mutator_alloc_region() { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
4318 |
_mutator_alloc_region.release(); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
4319 |
assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
4320 |
} |
5347
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4321 |
|
18025 | 4322 |
void G1CollectedHeap::init_gc_alloc_regions(EvacuationInfo& evacuation_info) { |
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4323 |
assert_at_safepoint(true /* should_be_vm_thread */); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4324 |
|
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4325 |
_survivor_gc_alloc_region.init(); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4326 |
_old_gc_alloc_region.init(); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4327 |
HeapRegion* retained_region = _retained_old_gc_alloc_region; |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4328 |
_retained_old_gc_alloc_region = NULL; |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4329 |
|
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4330 |
// We will discard the current GC alloc region if: |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4331 |
// a) it's in the collection set (it can happen!), |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4332 |
// b) it's already full (no point in using it), |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4333 |
// c) it's empty (this means that it was emptied during |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4334 |
// a cleanup and it should be on the free list now), or |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4335 |
// d) it's humongous (this means that it was emptied |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4336 |
// during a cleanup and was added to the free list, but |
18025 | 4337 |
// has been subsequently used to allocate a humongous |
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4338 |
// object that may be less than the region size). |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4339 |
if (retained_region != NULL && |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4340 |
!retained_region->in_collection_set() && |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4341 |
!(retained_region->top() == retained_region->end()) && |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4342 |
!retained_region->is_empty() && |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4343 |
!retained_region->isHumongous()) { |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4344 |
retained_region->set_saved_mark(); |
10996 | 4345 |
// The retained region was added to the old region set when it was |
4346 |
// retired. We have to remove it now, since we don't allow regions |
|
4347 |
// we allocate to in the region sets. We'll re-add it later, when |
|
4348 |
// it's retired again. |
|
4349 |
_old_set.remove(retained_region); |
|
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4350 |
bool during_im = g1_policy()->during_initial_mark_pause(); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4351 |
retained_region->note_start_of_copying(during_im); |
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4352 |
_old_gc_alloc_region.set(retained_region); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4353 |
_hr_printer.reuse(retained_region); |
18025 | 4354 |
evacuation_info.set_alloc_regions_used_before(retained_region->used()); |
4355 |
} |
|
4356 |
} |
|
4357 |
||
4358 |
void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) { |
|
4359 |
evacuation_info.set_allocation_regions(_survivor_gc_alloc_region.count() + |
|
4360 |
_old_gc_alloc_region.count()); |
|
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4361 |
_survivor_gc_alloc_region.release(); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4362 |
// If we have an old GC alloc region to release, we'll save it in |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4363 |
// _retained_old_gc_alloc_region. If we don't |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4364 |
// _retained_old_gc_alloc_region will become NULL. This is what we |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4365 |
// want either way so no reason to check explicitly for either |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4366 |
// condition. |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4367 |
_retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
13466 | 4368 |
|
4369 |
if (ResizePLAB) { |
|
13926 | 4370 |
_survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
4371 |
_old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
|
13466 | 4372 |
} |
1374 | 4373 |
} |
4374 |
||
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4375 |
void G1CollectedHeap::abandon_gc_alloc_regions() { |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4376 |
assert(_survivor_gc_alloc_region.get() == NULL, "pre-condition"); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4377 |
assert(_old_gc_alloc_region.get() == NULL, "pre-condition"); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4378 |
_retained_old_gc_alloc_region = NULL; |
1374 | 4379 |
} |
4380 |
||
4381 |
void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { |
|
4382 |
_drain_in_progress = false; |
|
4383 |
set_evac_failure_closure(cl); |
|
13195 | 4384 |
_evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
1374 | 4385 |
} |
4386 |
||
4387 |
void G1CollectedHeap::finalize_for_evac_failure() { |
|
4388 |
assert(_evac_failure_scan_stack != NULL && |
|
4389 |
_evac_failure_scan_stack->length() == 0, |
|
4390 |
"Postcondition"); |
|
4391 |
assert(!_drain_in_progress, "Postcondition"); |
|
4100 | 4392 |
delete _evac_failure_scan_stack; |
1374 | 4393 |
_evac_failure_scan_stack = NULL; |
4394 |
} |
|
4395 |
||
4396 |
void G1CollectedHeap::remove_self_forwarding_pointers() { |
|
11451
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
4397 |
assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
4398 |
|
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
4399 |
G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
4400 |
|
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
4401 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
4402 |
set_par_threads(); |
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
4403 |
workers()->run_task(&rsfp_task); |
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
4404 |
set_par_threads(0); |
2142
032f4652700c
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
2121
diff
changeset
|
4405 |
} else { |
11451
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
4406 |
rsfp_task.work(0); |
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
4407 |
} |
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
4408 |
|
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
4409 |
assert(check_cset_heap_region_claim_values(HeapRegion::ParEvacFailureClaimValue), "sanity"); |
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
4410 |
|
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
4411 |
// Reset the claim values in the regions in the collection set. |
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
4412 |
reset_cset_heap_region_claim_values(); |
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
4413 |
|
9c9aa4d85660
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
11449
diff
changeset
|
4414 |
assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
1374 | 4415 |
|
4416 |
// Now restore saved marks, if any. |
|
15608
a1fd1fc60c7d
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
15095
diff
changeset
|
4417 |
assert(_objs_with_preserved_marks.size() == |
a1fd1fc60c7d
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
15095
diff
changeset
|
4418 |
_preserved_marks_of_objs.size(), "Both or none."); |
a1fd1fc60c7d
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
15095
diff
changeset
|
4419 |
while (!_objs_with_preserved_marks.is_empty()) { |
a1fd1fc60c7d
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
15095
diff
changeset
|
4420 |
oop obj = _objs_with_preserved_marks.pop(); |
a1fd1fc60c7d
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
15095
diff
changeset
|
4421 |
markOop m = _preserved_marks_of_objs.pop(); |
a1fd1fc60c7d
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
15095
diff
changeset
|
4422 |
obj->set_mark(m); |
a1fd1fc60c7d
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
15095
diff
changeset
|
4423 |
} |
a1fd1fc60c7d
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
15095
diff
changeset
|
4424 |
_objs_with_preserved_marks.clear(true); |
a1fd1fc60c7d
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
15095
diff
changeset
|
4425 |
_preserved_marks_of_objs.clear(true); |
1374 | 4426 |
} |
4427 |
||
4428 |
void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { |
|
4429 |
_evac_failure_scan_stack->push(obj); |
|
4430 |
} |
|
4431 |
||
4432 |
void G1CollectedHeap::drain_evac_failure_scan_stack() { |
|
4433 |
assert(_evac_failure_scan_stack != NULL, "precondition"); |
|
4434 |
||
4435 |
while (_evac_failure_scan_stack->length() > 0) { |
|
4436 |
oop obj = _evac_failure_scan_stack->pop(); |
|
4437 |
_evac_failure_closure->set_region(heap_region_containing(obj)); |
|
4438 |
obj->oop_iterate_backwards(_evac_failure_closure); |
|
4439 |
} |
|
4440 |
} |
|
4441 |
||
4442 |
oop |
|
18025 | 4443 |
G1CollectedHeap::handle_evacuation_failure_par(G1ParScanThreadState* _par_scan_state, |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4444 |
oop old) { |
9424
acac49575ea0
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
9418
diff
changeset
|
4445 |
assert(obj_in_cs(old), |
acac49575ea0
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
9418
diff
changeset
|
4446 |
err_msg("obj: "PTR_FORMAT" should still be in the CSet", |
acac49575ea0
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
9418
diff
changeset
|
4447 |
(HeapWord*) old)); |
1374 | 4448 |
markOop m = old->mark(); |
4449 |
oop forward_ptr = old->forward_to_atomic(old); |
|
4450 |
if (forward_ptr == NULL) { |
|
4451 |
// Forward-to-self succeeded. |
|
18025 | 4452 |
assert(_par_scan_state != NULL, "par scan state"); |
4453 |
OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); |
|
4454 |
uint queue_num = _par_scan_state->queue_num(); |
|
4455 |
||
4456 |
_evacuation_failed = true; |
|
4457 |
_evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); |
|
1374 | 4458 |
if (_evac_failure_closure != cl) { |
4459 |
MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); |
|
4460 |
assert(!_drain_in_progress, |
|
4461 |
"Should only be true while someone holds the lock."); |
|
4462 |
// Set the global evac-failure closure to the current thread's. |
|
4463 |
assert(_evac_failure_closure == NULL, "Or locking has failed."); |
|
4464 |
set_evac_failure_closure(cl); |
|
4465 |
// Now do the common part. |
|
4466 |
handle_evacuation_failure_common(old, m); |
|
4467 |
// Reset to NULL. |
|
4468 |
set_evac_failure_closure(NULL); |
|
4469 |
} else { |
|
4470 |
// The lock is already held, and this is recursive. |
|
4471 |
assert(_drain_in_progress, "This should only be the recursive case."); |
|
4472 |
handle_evacuation_failure_common(old, m); |
|
4473 |
} |
|
4474 |
return old; |
|
4475 |
} else { |
|
9424
acac49575ea0
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
9418
diff
changeset
|
4476 |
// Forward-to-self failed. Either someone else managed to allocate |
acac49575ea0
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
9418
diff
changeset
|
4477 |
// space for this object (old != forward_ptr) or they beat us in |
acac49575ea0
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
9418
diff
changeset
|
4478 |
// self-forwarding it (old == forward_ptr). |
acac49575ea0
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
9418
diff
changeset
|
4479 |
assert(old == forward_ptr || !obj_in_cs(forward_ptr), |
acac49575ea0
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
9418
diff
changeset
|
4480 |
err_msg("obj: "PTR_FORMAT" forwarded to: "PTR_FORMAT" " |
acac49575ea0
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
9418
diff
changeset
|
4481 |
"should not be in the CSet", |
acac49575ea0
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
9418
diff
changeset
|
4482 |
(HeapWord*) old, (HeapWord*) forward_ptr)); |
1374 | 4483 |
return forward_ptr; |
4484 |
} |
|
4485 |
} |
|
4486 |
||
4487 |
void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { |
|
4488 |
preserve_mark_if_necessary(old, m); |
|
4489 |
||
4490 |
HeapRegion* r = heap_region_containing(old); |
|
4491 |
if (!r->evacuation_failed()) { |
|
4492 |
r->set_evacuation_failed(true); |
|
10001
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
4493 |
_hr_printer.evac_failure(r); |
1374 | 4494 |
} |
4495 |
||
4496 |
push_on_evac_failure_scan_stack(old); |
|
4497 |
||
4498 |
if (!_drain_in_progress) { |
|
4499 |
// prevent recursion in copy_to_survivor_space() |
|
4500 |
_drain_in_progress = true; |
|
4501 |
drain_evac_failure_scan_stack(); |
|
4502 |
_drain_in_progress = false; |
|
4503 |
} |
|
4504 |
} |
|
4505 |
||
4506 |
void G1CollectedHeap::preserve_mark_if_necessary(oop obj, markOop m) { |
|
7658
b970e410547a
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
7657
diff
changeset
|
4507 |
assert(evacuation_failed(), "Oversaving!"); |
b970e410547a
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
7657
diff
changeset
|
4508 |
// We want to call the "for_promotion_failure" version only in the |
b970e410547a
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
7657
diff
changeset
|
4509 |
// case of a promotion failure. |
b970e410547a
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
7657
diff
changeset
|
4510 |
if (m->must_be_preserved_for_promotion_failure(obj)) { |
15608
a1fd1fc60c7d
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
15095
diff
changeset
|
4511 |
_objs_with_preserved_marks.push(obj); |
a1fd1fc60c7d
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
15095
diff
changeset
|
4512 |
_preserved_marks_of_objs.push(m); |
1374 | 4513 |
} |
4514 |
} |
|
4515 |
||
4516 |
HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, |
|
4517 |
size_t word_size) { |
|
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4518 |
if (purpose == GCAllocForSurvived) { |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4519 |
HeapWord* result = survivor_attempt_allocation(word_size); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4520 |
if (result != NULL) { |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4521 |
return result; |
1374 | 4522 |
} else { |
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4523 |
// Let's try to allocate in the old gen in case we can fit the |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4524 |
// object there. |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4525 |
return old_attempt_allocation(word_size); |
1374 | 4526 |
} |
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4527 |
} else { |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4528 |
assert(purpose == GCAllocForTenured, "sanity"); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4529 |
HeapWord* result = old_attempt_allocation(word_size); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4530 |
if (result != NULL) { |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4531 |
return result; |
1374 | 4532 |
} else { |
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4533 |
// Let's try to allocate in the survivors in case we can fit the |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4534 |
// object there. |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4535 |
return survivor_attempt_allocation(word_size); |
1374 | 4536 |
} |
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4537 |
} |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4538 |
|
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4539 |
ShouldNotReachHere(); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4540 |
// Trying to keep some compilers happy. |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
4541 |
return NULL; |
1374 | 4542 |
} |
4543 |
||
10495
d20531ba2b31
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
10282
diff
changeset
|
4544 |
G1ParGCAllocBuffer::G1ParGCAllocBuffer(size_t gclab_word_size) : |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4545 |
ParGCAllocBuffer(gclab_word_size), _retired(false) { } |
10495
d20531ba2b31
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
10282
diff
changeset
|
4546 |
|
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11581
diff
changeset
|
4547 |
G1ParScanThreadState::G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num) |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4548 |
: _g1h(g1h), |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4549 |
_refs(g1h->task_queue(queue_num)), |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4550 |
_dcq(&g1h->dirty_card_queue_set()), |
20309 | 4551 |
_ct_bs(g1h->g1_barrier_set()), |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4552 |
_g1_rem(g1h->g1_rem_set()), |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4553 |
_hash_seed(17), _queue_num(queue_num), |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4554 |
_term_attempts(0), |
5347
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4555 |
_surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4556 |
_tenured_alloc_buffer(g1h->desired_plab_sz(GCAllocForTenured)), |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4557 |
_age_table(false), |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4558 |
_strong_roots_time(0), _term_time(0), |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4559 |
_alloc_buffer_waste(0), _undo_waste(0) { |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4560 |
// we allocate G1YoungSurvRateNumRegions plus one entries, since |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4561 |
// we "sacrifice" entry 0 to keep track of surviving bytes for |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4562 |
// non-young regions (where the age is -1) |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4563 |
// We also add a few elements at the beginning and at the end in |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4564 |
// an attempt to eliminate cache contention |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
4565 |
uint real_length = 1 + _g1h->g1_policy()->young_cset_region_length(); |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
4566 |
uint array_length = PADDING_ELEM_NUM + |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
4567 |
real_length + |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
4568 |
PADDING_ELEM_NUM; |
13195 | 4569 |
_surviving_young_words_base = NEW_C_HEAP_ARRAY(size_t, array_length, mtGC); |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4570 |
if (_surviving_young_words_base == NULL) |
17087
f0b76c4c93a0
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
16994
diff
changeset
|
4571 |
vm_exit_out_of_memory(array_length * sizeof(size_t), OOM_MALLOC_ERROR, |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4572 |
"Not enough space for young surv histo."); |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4573 |
_surviving_young_words = _surviving_young_words_base + PADDING_ELEM_NUM; |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
4574 |
memset(_surviving_young_words, 0, (size_t) real_length * sizeof(size_t)); |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4575 |
|
5347
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4576 |
_alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4577 |
_alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
1de2255c6c2e
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
5346
diff
changeset
|
4578 |
|
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4579 |
_start = os::elapsedTime(); |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4580 |
} |
1374 | 4581 |
|
6251 | 4582 |
void |
4583 |
G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) |
|
4584 |
{ |
|
4585 |
st->print_raw_cr("GC Termination Stats"); |
|
4586 |
st->print_raw_cr(" elapsed --strong roots-- -------termination-------" |
|
4587 |
" ------waste (KiB)------"); |
|
4588 |
st->print_raw_cr("thr ms ms % ms % attempts" |
|
4589 |
" total alloc undo"); |
|
4590 |
st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" |
|
4591 |
" ------- ------- -------"); |
|
4592 |
} |
|
4593 |
||
4594 |
void |
|
4595 |
G1ParScanThreadState::print_termination_stats(int i, |
|
4596 |
outputStream* const st) const |
|
4597 |
{ |
|
4598 |
const double elapsed_ms = elapsed_time() * 1000.0; |
|
4599 |
const double s_roots_ms = strong_roots_time() * 1000.0; |
|
4600 |
const double term_ms = term_time() * 1000.0; |
|
4601 |
st->print_cr("%3d %9.2f %9.2f %6.2f " |
|
4602 |
"%9.2f %6.2f " SIZE_FORMAT_W(8) " " |
|
4603 |
SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), |
|
4604 |
i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, |
|
4605 |
term_ms, term_ms * 100 / elapsed_ms, term_attempts(), |
|
4606 |
(alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, |
|
4607 |
alloc_buffer_waste() * HeapWordSize / K, |
|
4608 |
undo_waste() * HeapWordSize / K); |
|
4609 |
} |
|
4610 |
||
6959
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4611 |
#ifdef ASSERT |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4612 |
bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4613 |
assert(ref != NULL, "invariant"); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4614 |
assert(UseCompressedOops, "sanity"); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4615 |
assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4616 |
oop p = oopDesc::load_decode_heap_oop(ref); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4617 |
assert(_g1h->is_in_g1_reserved(p), |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4618 |
err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4619 |
return true; |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4620 |
} |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4621 |
|
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4622 |
bool G1ParScanThreadState::verify_ref(oop* ref) const { |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4623 |
assert(ref != NULL, "invariant"); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4624 |
if (has_partial_array_mask(ref)) { |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4625 |
// Must be in the collection set--it's already been copied. |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4626 |
oop p = clear_partial_array_mask(ref); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4627 |
assert(_g1h->obj_in_cs(p), |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4628 |
err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4629 |
} else { |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4630 |
oop p = oopDesc::load_decode_heap_oop(ref); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4631 |
assert(_g1h->is_in_g1_reserved(p), |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4632 |
err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4633 |
} |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4634 |
return true; |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4635 |
} |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4636 |
|
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4637 |
bool G1ParScanThreadState::verify_task(StarTask ref) const { |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4638 |
if (ref.is_narrow()) { |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4639 |
return verify_ref((narrowOop*) ref); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4640 |
} else { |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4641 |
return verify_ref((oop*) ref); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4642 |
} |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4643 |
} |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4644 |
#endif // ASSERT |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4645 |
|
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4646 |
void G1ParScanThreadState::trim_queue() { |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4647 |
assert(_evac_cl != NULL, "not set"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4648 |
assert(_evac_failure_cl != NULL, "not set"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4649 |
assert(_partial_scan_cl != NULL, "not set"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4650 |
|
6959
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4651 |
StarTask ref; |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4652 |
do { |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4653 |
// Drain the overflow stack first, so other threads can steal. |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4654 |
while (refs()->pop_overflow(ref)) { |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4655 |
deal_with_reference(ref); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4656 |
} |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
4657 |
|
6959
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4658 |
while (refs()->pop_local(ref)) { |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4659 |
deal_with_reference(ref); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4660 |
} |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4661 |
} while (!refs()->is_empty()); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4662 |
} |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4663 |
|
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4664 |
G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4665 |
G1ParScanThreadState* par_scan_state) : |
1374 | 4666 |
_g1(g1), _g1_rem(_g1->g1_rem_set()), _cm(_g1->concurrent_mark()), |
10495
d20531ba2b31
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
10282
diff
changeset
|
4667 |
_par_scan_state(par_scan_state), |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11581
diff
changeset
|
4668 |
_worker_id(par_scan_state->queue_num()), |
10495
d20531ba2b31
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
10282
diff
changeset
|
4669 |
_during_initial_mark(_g1->g1_policy()->during_initial_mark_pause()), |
d20531ba2b31
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
10282
diff
changeset
|
4670 |
_mark_in_progress(_g1->mark_in_progress()) { } |
d20531ba2b31
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
10282
diff
changeset
|
4671 |
|
12271 | 4672 |
template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
4673 |
void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object>::mark_object(oop obj) { |
|
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4674 |
#ifdef ASSERT |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4675 |
HeapRegion* hr = _g1->heap_region_containing(obj); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4676 |
assert(hr != NULL, "sanity"); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4677 |
assert(!hr->in_collection_set(), "should not mark objects in the CSet"); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4678 |
#endif // ASSERT |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4679 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4680 |
// We know that the object is not moving so it's safe to read its size. |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11581
diff
changeset
|
4681 |
_cm->grayRoot(obj, (size_t) obj->size(), _worker_id); |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4682 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4683 |
|
12271 | 4684 |
template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
4685 |
void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> |
|
4686 |
::mark_forwarded_object(oop from_obj, oop to_obj) { |
|
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4687 |
#ifdef ASSERT |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4688 |
assert(from_obj->is_forwarded(), "from obj should be forwarded"); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4689 |
assert(from_obj->forwardee() == to_obj, "to obj should be the forwardee"); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4690 |
assert(from_obj != to_obj, "should not be self-forwarded"); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4691 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4692 |
HeapRegion* from_hr = _g1->heap_region_containing(from_obj); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4693 |
assert(from_hr != NULL, "sanity"); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4694 |
assert(from_hr->in_collection_set(), "from obj should be in the CSet"); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4695 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4696 |
HeapRegion* to_hr = _g1->heap_region_containing(to_obj); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4697 |
assert(to_hr != NULL, "sanity"); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4698 |
assert(!to_hr->in_collection_set(), "should not mark objects in the CSet"); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4699 |
#endif // ASSERT |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4700 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4701 |
// The object might be in the process of being copied by another |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4702 |
// worker so we cannot trust that its to-space image is |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4703 |
// well-formed. So we have to read its size from its from-space |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4704 |
// image which we know should not be changing. |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11581
diff
changeset
|
4705 |
_cm->grayRoot(to_obj, (size_t) from_obj->size(), _worker_id); |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4706 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4707 |
|
12271 | 4708 |
template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
4709 |
oop G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> |
|
4710 |
::copy_to_survivor_space(oop old) { |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
4711 |
size_t word_sz = old->size(); |
1374 | 4712 |
HeapRegion* from_region = _g1->heap_region_containing_raw(old); |
4713 |
// +1 to make the -1 indexes valid... |
|
4714 |
int young_index = from_region->young_index_in_cset()+1; |
|
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4715 |
assert( (from_region->is_young() && young_index > 0) || |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4716 |
(!from_region->is_young() && young_index == 0), "invariant" ); |
1374 | 4717 |
G1CollectorPolicy* g1p = _g1->g1_policy(); |
4718 |
markOop m = old->mark(); |
|
2009 | 4719 |
int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
4720 |
: m->age(); |
|
4721 |
GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, |
|
1374 | 4722 |
word_sz); |
4723 |
HeapWord* obj_ptr = _par_scan_state->allocate(alloc_purpose, word_sz); |
|
13517
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
4724 |
#ifndef PRODUCT |
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
4725 |
// Should this evacuation fail? |
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
4726 |
if (_g1->evacuation_should_fail()) { |
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
4727 |
if (obj_ptr != NULL) { |
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
4728 |
_par_scan_state->undo_allocation(alloc_purpose, obj_ptr, word_sz); |
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
4729 |
obj_ptr = NULL; |
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
4730 |
} |
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
4731 |
} |
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
4732 |
#endif // !PRODUCT |
1374 | 4733 |
|
4734 |
if (obj_ptr == NULL) { |
|
4735 |
// This will either forward-to-self, or detect that someone else has |
|
4736 |
// installed a forwarding pointer. |
|
18025 | 4737 |
return _g1->handle_evacuation_failure_par(_par_scan_state, old); |
1374 | 4738 |
} |
4739 |
||
13517
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
4740 |
oop obj = oop(obj_ptr); |
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
4741 |
|
1902 | 4742 |
// We're going to allocate linearly, so might as well prefetch ahead. |
4743 |
Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); |
|
4744 |
||
1374 | 4745 |
oop forward_ptr = old->forward_to_atomic(obj); |
4746 |
if (forward_ptr == NULL) { |
|
4747 |
Copy::aligned_disjoint_words((HeapWord*) old, obj_ptr, word_sz); |
|
1902 | 4748 |
if (g1p->track_object_age(alloc_purpose)) { |
4749 |
// We could simply do obj->incr_age(). However, this causes a |
|
4750 |
// performance issue. obj->incr_age() will first check whether |
|
4751 |
// the object has a displaced mark by checking its mark word; |
|
4752 |
// getting the mark word from the new location of the object |
|
4753 |
// stalls. So, given that we already have the mark word and we |
|
4754 |
// are about to install it anyway, it's better to increase the |
|
4755 |
// age on the mark word, when the object does not have a |
|
4756 |
// displaced mark word. We're not expecting many objects to have |
|
4757 |
// a displaced marked word, so that case is not optimized |
|
4758 |
// further (it could be...) and we simply call obj->incr_age(). |
|
4759 |
||
4760 |
if (m->has_displaced_mark_helper()) { |
|
4761 |
// in this case, we have to install the mark word first, |
|
4762 |
// otherwise obj looks to be forwarded (the old mark word, |
|
4763 |
// which contains the forward pointer, was copied) |
|
4764 |
obj->set_mark(m); |
|
4765 |
obj->incr_age(); |
|
4766 |
} else { |
|
4767 |
m = m->incr_age(); |
|
2009 | 4768 |
obj->set_mark(m); |
1902 | 4769 |
} |
2009 | 4770 |
_par_scan_state->age_table()->add(obj, word_sz); |
4771 |
} else { |
|
4772 |
obj->set_mark(m); |
|
1902 | 4773 |
} |
4774 |
||
1374 | 4775 |
size_t* surv_young_words = _par_scan_state->surviving_young_words(); |
4776 |
surv_young_words[young_index] += word_sz; |
|
4777 |
||
4778 |
if (obj->is_objArray() && arrayOop(obj)->length() >= ParGCArrayScanChunk) { |
|
11452
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4779 |
// We keep track of the next start index in the length field of |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4780 |
// the to-space object. The actual length can be found in the |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4781 |
// length field of the from-space object. |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4782 |
arrayOop(obj)->set_length(0); |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4783 |
oop* old_p = set_partial_array_mask(old); |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4784 |
_par_scan_state->push_on_queue(old_p); |
1374 | 4785 |
} else { |
1902 | 4786 |
// No point in using the slower heap_region_containing() method, |
4787 |
// given that we know obj is in the heap. |
|
12271 | 4788 |
_scanner.set_region(_g1->heap_region_containing_raw(obj)); |
4789 |
obj->oop_iterate_backwards(&_scanner); |
|
1374 | 4790 |
} |
4791 |
} else { |
|
4792 |
_par_scan_state->undo_allocation(alloc_purpose, obj_ptr, word_sz); |
|
4793 |
obj = forward_ptr; |
|
4794 |
} |
|
4795 |
return obj; |
|
4796 |
} |
|
4797 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4798 |
template <class T> |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4799 |
void G1ParCopyHelper::do_klass_barrier(T* p, oop new_obj) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4800 |
if (_g1->heap_region_containing_raw(new_obj)->is_young()) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4801 |
_scanned_klass->record_modified_oops(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4802 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4803 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4804 |
|
10495
d20531ba2b31
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
10282
diff
changeset
|
4805 |
template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4806 |
template <class T> |
10495
d20531ba2b31
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
10282
diff
changeset
|
4807 |
void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4808 |
::do_oop_work(T* p) { |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4809 |
oop obj = oopDesc::load_decode_heap_oop(p); |
1374 | 4810 |
assert(barrier != G1BarrierRS || obj != NULL, |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4811 |
"Precondition: G1BarrierRS implies obj is non-NULL"); |
10495
d20531ba2b31
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
10282
diff
changeset
|
4812 |
|
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11581
diff
changeset
|
4813 |
assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11581
diff
changeset
|
4814 |
|
1902 | 4815 |
// here the null check is implicit in the cset_fast_test() test |
4902
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4886
diff
changeset
|
4816 |
if (_g1->in_cset_fast_test(obj)) { |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4817 |
oop forwardee; |
1902 | 4818 |
if (obj->is_forwarded()) { |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4819 |
forwardee = obj->forwardee(); |
1902 | 4820 |
} else { |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4821 |
forwardee = copy_to_survivor_space(obj); |
1374 | 4822 |
} |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4823 |
assert(forwardee != NULL, "forwardee should not be NULL"); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4824 |
oopDesc::encode_store_heap_oop(p, forwardee); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4825 |
if (do_mark_object && forwardee != obj) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4826 |
// If the object is self-forwarded we don't need to explicitly |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4827 |
// mark it, the evacuation failure protocol will do so. |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4828 |
mark_forwarded_object(obj, forwardee); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4829 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4830 |
|
1902 | 4831 |
// When scanning the RS, we only care about objs in CS. |
4832 |
if (barrier == G1BarrierRS) { |
|
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11581
diff
changeset
|
4833 |
_par_scan_state->update_rs(_from, p, _worker_id); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4834 |
} else if (barrier == G1BarrierKlass) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4835 |
do_klass_barrier(p, forwardee); |
1374 | 4836 |
} |
10495
d20531ba2b31
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
10282
diff
changeset
|
4837 |
} else { |
d20531ba2b31
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
10282
diff
changeset
|
4838 |
// The object is not in collection set. If we're a root scanning |
d20531ba2b31
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
10282
diff
changeset
|
4839 |
// closure during an initial mark pause (i.e. do_mark_object will |
d20531ba2b31
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
10282
diff
changeset
|
4840 |
// be true) then attempt to mark the object. |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4841 |
if (do_mark_object && _g1->is_in_g1_reserved(obj)) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
4842 |
mark_object(obj); |
10495
d20531ba2b31
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
10282
diff
changeset
|
4843 |
} |
1902 | 4844 |
} |
4845 |
||
4846 |
if (barrier == G1BarrierEvac && obj != NULL) { |
|
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11581
diff
changeset
|
4847 |
_par_scan_state->update_rs(_from, p, _worker_id); |
1902 | 4848 |
} |
4849 |
||
4850 |
if (do_gen_barrier && obj != NULL) { |
|
4851 |
par_do_barrier(p); |
|
4852 |
} |
|
4853 |
} |
|
4854 |
||
4902
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4886
diff
changeset
|
4855 |
template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(oop* p); |
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4886
diff
changeset
|
4856 |
template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(narrowOop* p); |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4857 |
|
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3191
diff
changeset
|
4858 |
template <class T> void G1ParScanPartialArrayClosure::do_oop_nv(T* p) { |
1902 | 4859 |
assert(has_partial_array_mask(p), "invariant"); |
11452
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4860 |
oop from_obj = clear_partial_array_mask(p); |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4861 |
|
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4862 |
assert(Universe::heap()->is_in_reserved(from_obj), "must be in heap."); |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4863 |
assert(from_obj->is_objArray(), "must be obj array"); |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4864 |
objArrayOop from_obj_array = objArrayOop(from_obj); |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4865 |
// The from-space object contains the real length. |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4866 |
int length = from_obj_array->length(); |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4867 |
|
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4868 |
assert(from_obj->is_forwarded(), "must be forwarded"); |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4869 |
oop to_obj = from_obj->forwardee(); |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4870 |
assert(from_obj != to_obj, "should not be chunking self-forwarded objects"); |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4871 |
objArrayOop to_obj_array = objArrayOop(to_obj); |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4872 |
// We keep track of the next start index in the length field of the |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4873 |
// to-space object. |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4874 |
int next_index = to_obj_array->length(); |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4875 |
assert(0 <= next_index && next_index < length, |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4876 |
err_msg("invariant, next index: %d, length: %d", next_index, length)); |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4877 |
|
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4878 |
int start = next_index; |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4879 |
int end = length; |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4880 |
int remainder = end - start; |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4881 |
// We'll try not to push a range that's smaller than ParGCArrayScanChunk. |
1374 | 4882 |
if (remainder > 2 * ParGCArrayScanChunk) { |
4883 |
end = start + ParGCArrayScanChunk; |
|
11452
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4884 |
to_obj_array->set_length(end); |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4885 |
// Push the remainder before we process the range in case another |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4886 |
// worker has run out of things to do and can steal it. |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4887 |
oop* from_obj_p = set_partial_array_mask(from_obj); |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4888 |
_par_scan_state->push_on_queue(from_obj_p); |
1374 | 4889 |
} else { |
11452
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4890 |
assert(length == end, "sanity"); |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4891 |
// We'll process the final range for this object. Restore the length |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4892 |
// so that the heap remains parsable in case of evacuation failure. |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4893 |
to_obj_array->set_length(end); |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4894 |
} |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4895 |
_scanner.set_region(_g1->heap_region_containing_raw(to_obj)); |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4896 |
// Process indexes [start,end). It will also process the header |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4897 |
// along with the first chunk (i.e., the chunk with start == 0). |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4898 |
// Note that at this point the length field of to_obj_array is not |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4899 |
// correct given that we are using it to keep track of the next |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4900 |
// start index. oop_iterate_range() (thankfully!) ignores the length |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4901 |
// field and only relies on the start / end parameters. It does |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4902 |
// however return the size of the object which will be incorrect. So |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4903 |
// we have to ignore it even if we wanted to use it. |
b14db5162ecd
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
11451
diff
changeset
|
4904 |
to_obj_array->oop_iterate_range(&_scanner, start, end); |
1374 | 4905 |
} |
4906 |
||
4907 |
class G1ParEvacuateFollowersClosure : public VoidClosure { |
|
4908 |
protected: |
|
4909 |
G1CollectedHeap* _g1h; |
|
4910 |
G1ParScanThreadState* _par_scan_state; |
|
4911 |
RefToScanQueueSet* _queues; |
|
4912 |
ParallelTaskTerminator* _terminator; |
|
4913 |
||
4914 |
G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
4915 |
RefToScanQueueSet* queues() { return _queues; } |
|
4916 |
ParallelTaskTerminator* terminator() { return _terminator; } |
|
4917 |
||
4918 |
public: |
|
4919 |
G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, |
|
4920 |
G1ParScanThreadState* par_scan_state, |
|
4921 |
RefToScanQueueSet* queues, |
|
4922 |
ParallelTaskTerminator* terminator) |
|
4923 |
: _g1h(g1h), _par_scan_state(par_scan_state), |
|
4924 |
_queues(queues), _terminator(terminator) {} |
|
4925 |
||
6959
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4926 |
void do_void(); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4927 |
|
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4928 |
private: |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4929 |
inline bool offer_termination(); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4930 |
}; |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4931 |
|
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4932 |
bool G1ParEvacuateFollowersClosure::offer_termination() { |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4933 |
G1ParScanThreadState* const pss = par_scan_state(); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4934 |
pss->start_term_time(); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4935 |
const bool res = terminator()->offer_termination(); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4936 |
pss->end_term_time(); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4937 |
return res; |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4938 |
} |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4939 |
|
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4940 |
void G1ParEvacuateFollowersClosure::do_void() { |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4941 |
StarTask stolen_task; |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4942 |
G1ParScanThreadState* const pss = par_scan_state(); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4943 |
pss->trim_queue(); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4944 |
|
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4945 |
do { |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4946 |
while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4947 |
assert(pss->verify_task(stolen_task), "sanity"); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4948 |
if (stolen_task.is_narrow()) { |
6980
d19831e79825
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
6959
diff
changeset
|
4949 |
pss->deal_with_reference((narrowOop*) stolen_task); |
6959
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4950 |
} else { |
6980
d19831e79825
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
6959
diff
changeset
|
4951 |
pss->deal_with_reference((oop*) stolen_task); |
6959
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4952 |
} |
6980
d19831e79825
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
6959
diff
changeset
|
4953 |
|
d19831e79825
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
6959
diff
changeset
|
4954 |
// We've just processed a reference and we might have made |
d19831e79825
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
6959
diff
changeset
|
4955 |
// available new entries on the queues. So we have to make sure |
d19831e79825
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
6959
diff
changeset
|
4956 |
// we drain the queues as necessary. |
1374 | 4957 |
pss->trim_queue(); |
4958 |
} |
|
6959
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4959 |
} while (!offer_termination()); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4960 |
|
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4961 |
pss->retire_alloc_buffers(); |
01bebea2fd5c
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
6958
diff
changeset
|
4962 |
} |
1374 | 4963 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4964 |
class G1KlassScanClosure : public KlassClosure { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4965 |
G1ParCopyHelper* _closure; |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4966 |
bool _process_only_dirty; |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4967 |
int _count; |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4968 |
public: |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4969 |
G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4970 |
: _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4971 |
void do_klass(Klass* klass) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4972 |
// If the klass has not been dirtied we know that there's |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4973 |
// no references into the young gen and we can skip it. |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4974 |
if (!_process_only_dirty || klass->has_modified_oops()) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4975 |
// Clean the klass since we're going to scavenge all the metadata. |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4976 |
klass->clear_modified_oops(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4977 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4978 |
// Tell the closure that this klass is the Klass to scavenge |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4979 |
// and is the one to dirty if oops are left pointing into the young gen. |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4980 |
_closure->set_scanned_klass(klass); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4981 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4982 |
klass->oops_do(_closure); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4983 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4984 |
_closure->set_scanned_klass(NULL); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4985 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4986 |
_count++; |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4987 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4988 |
}; |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
4989 |
|
1374 | 4990 |
class G1ParTask : public AbstractGangTask { |
4991 |
protected: |
|
4992 |
G1CollectedHeap* _g1h; |
|
4993 |
RefToScanQueueSet *_queues; |
|
4994 |
ParallelTaskTerminator _terminator; |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
4995 |
uint _n_workers; |
1374 | 4996 |
|
4997 |
Mutex _stats_lock; |
|
4998 |
Mutex* stats_lock() { return &_stats_lock; } |
|
4999 |
||
5000 |
size_t getNCards() { |
|
5001 |
return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) |
|
5002 |
/ G1BlockOffsetSharedArray::N_bytes; |
|
5003 |
} |
|
5004 |
||
5005 |
public: |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5006 |
G1ParTask(G1CollectedHeap* g1h, |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5007 |
RefToScanQueueSet *task_queues) |
1374 | 5008 |
: AbstractGangTask("G1 collection"), |
5009 |
_g1h(g1h), |
|
5010 |
_queues(task_queues), |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5011 |
_terminator(0, _queues), |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5012 |
_stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
1374 | 5013 |
{} |
5014 |
||
5015 |
RefToScanQueueSet* queues() { return _queues; } |
|
5016 |
||
5017 |
RefToScanQueue *work_queue(int i) { |
|
5018 |
return queues()->queue(i); |
|
5019 |
} |
|
5020 |
||
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5021 |
ParallelTaskTerminator* terminator() { return &_terminator; } |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5022 |
|
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5023 |
virtual void set_for_termination(int active_workers) { |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5024 |
// This task calls set_n_termination() in par_non_clean_card_iterate_work() |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5025 |
// in the young space (_par_seq_tasks) in the G1 heap |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5026 |
// for SequentialSubTasksDone. |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5027 |
// This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5028 |
// both of which need setting by set_n_termination(). |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5029 |
_g1h->SharedHeap::set_n_termination(active_workers); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5030 |
_g1h->set_n_termination(active_workers); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5031 |
terminator()->reset_for_reuse(active_workers); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5032 |
_n_workers = active_workers; |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5033 |
} |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5034 |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
5035 |
void work(uint worker_id) { |
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
5036 |
if (worker_id >= _n_workers) return; // no work needed this round |
5891 | 5037 |
|
5038 |
double start_time_ms = os::elapsedTime() * 1000.0; |
|
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
5039 |
_g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
5891 | 5040 |
|
12270
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5041 |
{ |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5042 |
ResourceMark rm; |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5043 |
HandleMark hm; |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5044 |
|
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5045 |
ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5046 |
|
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5047 |
G1ParScanThreadState pss(_g1h, worker_id); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5048 |
G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, rp); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5049 |
G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5050 |
G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, rp); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5051 |
|
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5052 |
pss.set_evac_closure(&scan_evac_cl); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5053 |
pss.set_evac_failure_closure(&evac_failure_cl); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5054 |
pss.set_partial_scan_closure(&partial_scan_cl); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5055 |
|
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5056 |
G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5057 |
G1ParScanMetadataClosure only_scan_metadata_cl(_g1h, &pss, rp); |
12270
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5058 |
|
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5059 |
G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5060 |
G1ParScanAndMarkMetadataClosure scan_mark_metadata_cl(_g1h, &pss, rp); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5061 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5062 |
bool only_young = _g1h->g1_policy()->gcs_are_young(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5063 |
G1KlassScanClosure scan_mark_klasses_cl_s(&scan_mark_metadata_cl, false); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5064 |
G1KlassScanClosure only_scan_klasses_cl_s(&only_scan_metadata_cl, only_young); |
12270
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5065 |
|
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5066 |
OopClosure* scan_root_cl = &only_scan_root_cl; |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5067 |
G1KlassScanClosure* scan_klasses_cl = &only_scan_klasses_cl_s; |
12270
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5068 |
|
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5069 |
if (_g1h->g1_policy()->during_initial_mark_pause()) { |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5070 |
// We also need to mark copied objects. |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5071 |
scan_root_cl = &scan_mark_root_cl; |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5072 |
scan_klasses_cl = &scan_mark_klasses_cl_s; |
12270
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5073 |
} |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5074 |
|
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5075 |
G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5076 |
|
19339 | 5077 |
// Don't scan the scavengable methods in the code cache as part |
5078 |
// of strong root scanning. The code roots that point into a |
|
5079 |
// region in the collection set are scanned when we scan the |
|
5080 |
// region's RSet. |
|
5081 |
int so = SharedHeap::SO_AllClasses | SharedHeap::SO_Strings; |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5082 |
|
12270
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5083 |
pss.start_strong_roots(); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5084 |
_g1h->g1_process_strong_roots(/* is scavenging */ true, |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5085 |
SharedHeap::ScanningOption(so), |
12270
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5086 |
scan_root_cl, |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5087 |
&push_heap_rs_cl, |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5088 |
scan_klasses_cl, |
12270
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5089 |
worker_id); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5090 |
pss.end_strong_roots(); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5091 |
|
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5092 |
{ |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5093 |
double start = os::elapsedTime(); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5094 |
G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5095 |
evac.do_void(); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5096 |
double elapsed_ms = (os::elapsedTime()-start)*1000.0; |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5097 |
double term_ms = pss.term_time()*1000.0; |
13516
f7adc27fb367
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
13482
diff
changeset
|
5098 |
_g1h->g1_policy()->phase_times()->add_obj_copy_time(worker_id, elapsed_ms-term_ms); |
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
5099 |
_g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
12270
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5100 |
} |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5101 |
_g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5102 |
_g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5103 |
|
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5104 |
if (ParallelGCVerbose) { |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5105 |
MutexLocker x(stats_lock()); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5106 |
pss.print_termination_stats(worker_id); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5107 |
} |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5108 |
|
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5109 |
assert(pss.refs()->is_empty(), "should be empty"); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5110 |
|
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5111 |
// Close the inner scope so that the ResourceMark and HandleMark |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5112 |
// destructors are executed here and are included as part of the |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5113 |
// "GC Worker Time". |
1374 | 5114 |
} |
5115 |
||
5891 | 5116 |
double end_time_ms = os::elapsedTime() * 1000.0; |
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
5117 |
_g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
1374 | 5118 |
} |
5119 |
}; |
|
5120 |
||
5121 |
// *** Common G1 Evacuation Stuff |
|
5122 |
||
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
6425
diff
changeset
|
5123 |
// This method is run in a GC worker. |
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
6425
diff
changeset
|
5124 |
|
1374 | 5125 |
void |
5126 |
G1CollectedHeap:: |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5127 |
g1_process_strong_roots(bool is_scavenging, |
11754
b003db88c6d6
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
11639
diff
changeset
|
5128 |
ScanningOption so, |
1374 | 5129 |
OopClosure* scan_non_heap_roots, |
5130 |
OopsInHeapRegionClosure* scan_rs, |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5131 |
G1KlassScanClosure* scan_klasses, |
1374 | 5132 |
int worker_i) { |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5133 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5134 |
// First scan the strong roots |
1374 | 5135 |
double ext_roots_start = os::elapsedTime(); |
5136 |
double closure_app_time_sec = 0.0; |
|
5137 |
||
5138 |
BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); |
|
5139 |
||
19339 | 5140 |
assert(so & SO_CodeCache || scan_rs != NULL, "must scan code roots somehow"); |
5141 |
// Walk the code cache/strong code roots w/o buffering, because StarTask |
|
5142 |
// cannot handle unaligned oop locations. |
|
5143 |
CodeBlobToOopClosure eager_scan_code_roots(scan_non_heap_roots, true /* do_marking */); |
|
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3590
diff
changeset
|
5144 |
|
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3590
diff
changeset
|
5145 |
process_strong_roots(false, // no scoping; this is parallel code |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5146 |
is_scavenging, so, |
1374 | 5147 |
&buf_scan_non_heap_roots, |
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3590
diff
changeset
|
5148 |
&eager_scan_code_roots, |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5149 |
scan_klasses |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5150 |
); |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
5151 |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5152 |
// Now the CM ref_processor roots. |
10236
c4256e927bed
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
10001
diff
changeset
|
5153 |
if (!_process_strong_tasks->is_task_claimed(G1H_PS_refProcessor_oops_do)) { |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5154 |
// We need to treat the discovered reference lists of the |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5155 |
// concurrent mark ref processor as roots and keep entries |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5156 |
// (which are added by the marking threads) on them live |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5157 |
// until they can be processed at the end of marking. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5158 |
ref_processor_cm()->weak_oops_do(&buf_scan_non_heap_roots); |
10236
c4256e927bed
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
10001
diff
changeset
|
5159 |
} |
c4256e927bed
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
10001
diff
changeset
|
5160 |
|
c4256e927bed
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
10001
diff
changeset
|
5161 |
// Finish up any enqueued closure apps (attributed as object copy time). |
1374 | 5162 |
buf_scan_non_heap_roots.done(); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5163 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5164 |
double obj_copy_time_sec = buf_scan_non_heap_roots.closure_app_seconds(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5165 |
|
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
5166 |
g1_policy()->phase_times()->record_obj_copy_time(worker_i, obj_copy_time_sec * 1000.0); |
10236
c4256e927bed
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
10001
diff
changeset
|
5167 |
|
1374 | 5168 |
double ext_root_time_ms = |
13516
f7adc27fb367
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
13482
diff
changeset
|
5169 |
((os::elapsedTime() - ext_roots_start) - obj_copy_time_sec) * 1000.0; |
10236
c4256e927bed
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
10001
diff
changeset
|
5170 |
|
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
5171 |
g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
1374 | 5172 |
|
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
5173 |
// During conc marking we have to filter the per-thread SATB buffers |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
5174 |
// to make sure we remove any oops into the CSet (which will show up |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
5175 |
// as implicitly live). |
13516
f7adc27fb367
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
13482
diff
changeset
|
5176 |
double satb_filtering_ms = 0.0; |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
5177 |
if (!_process_strong_tasks->is_task_claimed(G1H_PS_filter_satb_buffers)) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
5178 |
if (mark_in_progress()) { |
13516
f7adc27fb367
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
13482
diff
changeset
|
5179 |
double satb_filter_start = os::elapsedTime(); |
f7adc27fb367
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
13482
diff
changeset
|
5180 |
|
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
5181 |
JavaThread::satb_mark_queue_set().filter_thread_buffers(); |
13516
f7adc27fb367
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
13482
diff
changeset
|
5182 |
|
f7adc27fb367
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
13482
diff
changeset
|
5183 |
satb_filtering_ms = (os::elapsedTime() - satb_filter_start) * 1000.0; |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
5184 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
5185 |
} |
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
5186 |
g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
1374 | 5187 |
|
19339 | 5188 |
// If this is an initial mark pause, and we're not scanning |
5189 |
// the entire code cache, we need to mark the oops in the |
|
5190 |
// strong code root lists for the regions that are not in |
|
5191 |
// the collection set. |
|
5192 |
// Note all threads participate in this set of root tasks. |
|
5193 |
double mark_strong_code_roots_ms = 0.0; |
|
5194 |
if (g1_policy()->during_initial_mark_pause() && !(so & SO_CodeCache)) { |
|
5195 |
double mark_strong_roots_start = os::elapsedTime(); |
|
5196 |
mark_strong_code_roots(worker_i); |
|
5197 |
mark_strong_code_roots_ms = (os::elapsedTime() - mark_strong_roots_start) * 1000.0; |
|
5198 |
} |
|
5199 |
g1_policy()->phase_times()->record_strong_code_root_mark_time(worker_i, mark_strong_code_roots_ms); |
|
5200 |
||
1374 | 5201 |
// Now scan the complement of the collection set. |
5202 |
if (scan_rs != NULL) { |
|
19339 | 5203 |
g1_rem_set()->oops_into_collection_set_do(scan_rs, &eager_scan_code_roots, worker_i); |
1374 | 5204 |
} |
5205 |
_process_strong_tasks->all_tasks_completed(); |
|
5206 |
} |
|
5207 |
||
5208 |
void |
|
17105
25b392a7740d
8012687: Remove unused is_root checks and closures
stefank
parents:
16994
diff
changeset
|
5209 |
G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure) { |
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3590
diff
changeset
|
5210 |
CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
17105
25b392a7740d
8012687: Remove unused is_root checks and closures
stefank
parents:
16994
diff
changeset
|
5211 |
SharedHeap::process_weak_roots(root_closure, &roots_in_blobs); |
1374 | 5212 |
} |
5213 |
||
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5214 |
// Weak Reference Processing support |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5215 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5216 |
// An always "is_alive" closure that is used to preserve referents. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5217 |
// If the object is non-null then it's alive. Used in the preservation |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5218 |
// of referent objects that are pointed to by reference objects |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5219 |
// discovered by the CM ref processor. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5220 |
class G1AlwaysAliveClosure: public BoolObjectClosure { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5221 |
G1CollectedHeap* _g1; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5222 |
public: |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5223 |
G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5224 |
bool do_object_b(oop p) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5225 |
if (p != NULL) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5226 |
return true; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5227 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5228 |
return false; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5229 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5230 |
}; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5231 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5232 |
bool G1STWIsAliveClosure::do_object_b(oop p) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5233 |
// An object is reachable if it is outside the collection set, |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5234 |
// or is inside and copied. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5235 |
return !_g1->obj_in_cs(p) || p->is_forwarded(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5236 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5237 |
|
4ea0e7d2ffbc
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changeset
|
5238 |
// Non Copying Keep Alive closure |
4ea0e7d2ffbc
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changeset
|
5239 |
class G1KeepAliveClosure: public OopClosure { |
4ea0e7d2ffbc
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|
5240 |
G1CollectedHeap* _g1; |
4ea0e7d2ffbc
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parents:
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changeset
|
5241 |
public: |
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changeset
|
5242 |
G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
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|
5243 |
void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
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changeset
|
5244 |
void do_oop( oop* p) { |
4ea0e7d2ffbc
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parents:
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changeset
|
5245 |
oop obj = *p; |
4ea0e7d2ffbc
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parents:
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changeset
|
5246 |
|
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parents:
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changeset
|
5247 |
if (_g1->obj_in_cs(obj)) { |
4ea0e7d2ffbc
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|
5248 |
assert( obj->is_forwarded(), "invariant" ); |
4ea0e7d2ffbc
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parents:
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diff
changeset
|
5249 |
*p = obj->forwardee(); |
4ea0e7d2ffbc
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parents:
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diff
changeset
|
5250 |
} |
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parents:
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changeset
|
5251 |
} |
4ea0e7d2ffbc
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parents:
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changeset
|
5252 |
}; |
4ea0e7d2ffbc
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parents:
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diff
changeset
|
5253 |
|
4ea0e7d2ffbc
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parents:
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changeset
|
5254 |
// Copying Keep Alive closure - can be called from both |
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|
5255 |
// serial and parallel code as long as different worker |
4ea0e7d2ffbc
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changeset
|
5256 |
// threads utilize different G1ParScanThreadState instances |
4ea0e7d2ffbc
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parents:
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changeset
|
5257 |
// and different queues. |
4ea0e7d2ffbc
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parents:
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changeset
|
5258 |
|
4ea0e7d2ffbc
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parents:
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changeset
|
5259 |
class G1CopyingKeepAliveClosure: public OopClosure { |
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|
5260 |
G1CollectedHeap* _g1h; |
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changeset
|
5261 |
OopClosure* _copy_non_heap_obj_cl; |
13728
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|
5262 |
OopsInHeapRegionClosure* _copy_metadata_obj_cl; |
10670
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|
5263 |
G1ParScanThreadState* _par_scan_state; |
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changeset
|
5264 |
|
4ea0e7d2ffbc
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parents:
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changeset
|
5265 |
public: |
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parents:
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changeset
|
5266 |
G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
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changeset
|
5267 |
OopClosure* non_heap_obj_cl, |
13728
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changeset
|
5268 |
OopsInHeapRegionClosure* metadata_obj_cl, |
10670
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changeset
|
5269 |
G1ParScanThreadState* pss): |
4ea0e7d2ffbc
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changeset
|
5270 |
_g1h(g1h), |
4ea0e7d2ffbc
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parents:
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changeset
|
5271 |
_copy_non_heap_obj_cl(non_heap_obj_cl), |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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parents:
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diff
changeset
|
5272 |
_copy_metadata_obj_cl(metadata_obj_cl), |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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changeset
|
5273 |
_par_scan_state(pss) |
4ea0e7d2ffbc
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parents:
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changeset
|
5274 |
{} |
4ea0e7d2ffbc
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parents:
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diff
changeset
|
5275 |
|
4ea0e7d2ffbc
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parents:
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changeset
|
5276 |
virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
4ea0e7d2ffbc
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changeset
|
5277 |
virtual void do_oop( oop* p) { do_oop_work(p); } |
4ea0e7d2ffbc
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parents:
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changeset
|
5278 |
|
4ea0e7d2ffbc
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parents:
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changeset
|
5279 |
template <class T> void do_oop_work(T* p) { |
4ea0e7d2ffbc
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parents:
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changeset
|
5280 |
oop obj = oopDesc::load_decode_heap_oop(p); |
4ea0e7d2ffbc
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parents:
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changeset
|
5281 |
|
4ea0e7d2ffbc
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parents:
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diff
changeset
|
5282 |
if (_g1h->obj_in_cs(obj)) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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changeset
|
5283 |
// If the referent object has been forwarded (either copied |
4ea0e7d2ffbc
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parents:
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changeset
|
5284 |
// to a new location or to itself in the event of an |
4ea0e7d2ffbc
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parents:
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changeset
|
5285 |
// evacuation failure) then we need to update the reference |
4ea0e7d2ffbc
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parents:
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changeset
|
5286 |
// field and, if both reference and referent are in the G1 |
4ea0e7d2ffbc
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parents:
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changeset
|
5287 |
// heap, update the RSet for the referent. |
4ea0e7d2ffbc
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parents:
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diff
changeset
|
5288 |
// |
4ea0e7d2ffbc
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parents:
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diff
changeset
|
5289 |
// If the referent has not been forwarded then we have to keep |
4ea0e7d2ffbc
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parents:
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changeset
|
5290 |
// it alive by policy. Therefore we have copy the referent. |
4ea0e7d2ffbc
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parents:
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changeset
|
5291 |
// |
4ea0e7d2ffbc
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parents:
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diff
changeset
|
5292 |
// If the reference field is in the G1 heap then we can push |
4ea0e7d2ffbc
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parents:
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changeset
|
5293 |
// on the PSS queue. When the queue is drained (after each |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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changeset
|
5294 |
// phase of reference processing) the object and it's followers |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5295 |
// will be copied, the reference field set to point to the |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5296 |
// new location, and the RSet updated. Otherwise we need to |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5297 |
// use the the non-heap or metadata closures directly to copy |
18025 | 5298 |
// the referent object and update the pointer, while avoiding |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5299 |
// updating the RSet. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5300 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5301 |
if (_g1h->is_in_g1_reserved(p)) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5302 |
_par_scan_state->push_on_queue(p); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5303 |
} else { |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5304 |
assert(!ClassLoaderDataGraph::contains((address)p), |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5305 |
err_msg("Otherwise need to call _copy_metadata_obj_cl->do_oop(p) " |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5306 |
PTR_FORMAT, p)); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5307 |
_copy_non_heap_obj_cl->do_oop(p); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5308 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5309 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5310 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5311 |
}; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5312 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5313 |
// Serial drain queue closure. Called as the 'complete_gc' |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5314 |
// closure for each discovered list in some of the |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5315 |
// reference processing phases. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5316 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5317 |
class G1STWDrainQueueClosure: public VoidClosure { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5318 |
protected: |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5319 |
G1CollectedHeap* _g1h; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5320 |
G1ParScanThreadState* _par_scan_state; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5321 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5322 |
G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5323 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5324 |
public: |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5325 |
G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5326 |
_g1h(g1h), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5327 |
_par_scan_state(pss) |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5328 |
{ } |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5329 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5330 |
void do_void() { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5331 |
G1ParScanThreadState* const pss = par_scan_state(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5332 |
pss->trim_queue(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5333 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5334 |
}; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5335 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5336 |
// Parallel Reference Processing closures |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5337 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5338 |
// Implementation of AbstractRefProcTaskExecutor for parallel reference |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5339 |
// processing during G1 evacuation pauses. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5340 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5341 |
class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5342 |
private: |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5343 |
G1CollectedHeap* _g1h; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5344 |
RefToScanQueueSet* _queues; |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5345 |
FlexibleWorkGang* _workers; |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5346 |
int _active_workers; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5347 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5348 |
public: |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5349 |
G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5350 |
FlexibleWorkGang* workers, |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5351 |
RefToScanQueueSet *task_queues, |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5352 |
int n_workers) : |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5353 |
_g1h(g1h), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5354 |
_queues(task_queues), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5355 |
_workers(workers), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5356 |
_active_workers(n_workers) |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5357 |
{ |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5358 |
assert(n_workers > 0, "shouldn't call this otherwise"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5359 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5360 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5361 |
// Executes the given task using concurrent marking worker threads. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5362 |
virtual void execute(ProcessTask& task); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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changeset
|
5363 |
virtual void execute(EnqueueTask& task); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5364 |
}; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5365 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5366 |
// Gang task for possibly parallel reference processing |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5367 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5368 |
class G1STWRefProcTaskProxy: public AbstractGangTask { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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changeset
|
5369 |
typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5370 |
ProcessTask& _proc_task; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5371 |
G1CollectedHeap* _g1h; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5372 |
RefToScanQueueSet *_task_queues; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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changeset
|
5373 |
ParallelTaskTerminator* _terminator; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5374 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5375 |
public: |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5376 |
G1STWRefProcTaskProxy(ProcessTask& proc_task, |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5377 |
G1CollectedHeap* g1h, |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5378 |
RefToScanQueueSet *task_queues, |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5379 |
ParallelTaskTerminator* terminator) : |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5380 |
AbstractGangTask("Process reference objects in parallel"), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5381 |
_proc_task(proc_task), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5382 |
_g1h(g1h), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5383 |
_task_queues(task_queues), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5384 |
_terminator(terminator) |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5385 |
{} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5386 |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
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diff
changeset
|
5387 |
virtual void work(uint worker_id) { |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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changeset
|
5388 |
// The reference processing task executed by a single worker. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5389 |
ResourceMark rm; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5390 |
HandleMark hm; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5391 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5392 |
G1STWIsAliveClosure is_alive(_g1h); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5393 |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
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diff
changeset
|
5394 |
G1ParScanThreadState pss(_g1h, worker_id); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5395 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5396 |
G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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changeset
|
5397 |
G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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changeset
|
5398 |
G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5399 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5400 |
pss.set_evac_closure(&scan_evac_cl); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5401 |
pss.set_evac_failure_closure(&evac_failure_cl); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5402 |
pss.set_partial_scan_closure(&partial_scan_cl); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5403 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5404 |
G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5405 |
G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5406 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5407 |
G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5408 |
G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5409 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5410 |
OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5411 |
OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5412 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5413 |
if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5414 |
// We also need to mark copied objects. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5415 |
copy_non_heap_cl = ©_mark_non_heap_cl; |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5416 |
copy_metadata_cl = ©_mark_metadata_cl; |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5417 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5418 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5419 |
// Keep alive closure. |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5420 |
G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5421 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5422 |
// Complete GC closure |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5423 |
G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5424 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5425 |
// Call the reference processing task's work routine. |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
5426 |
_proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5427 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5428 |
// Note we cannot assert that the refs array is empty here as not all |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5429 |
// of the processing tasks (specifically phase2 - pp2_work) execute |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5430 |
// the complete_gc closure (which ordinarily would drain the queue) so |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5431 |
// the queue may not be empty. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5432 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5433 |
}; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5434 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5435 |
// Driver routine for parallel reference processing. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5436 |
// Creates an instance of the ref processing gang |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5437 |
// task and has the worker threads execute it. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5438 |
void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5439 |
assert(_workers != NULL, "Need parallel worker threads."); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5440 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5441 |
ParallelTaskTerminator terminator(_active_workers, _queues); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5442 |
G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5443 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5444 |
_g1h->set_par_threads(_active_workers); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5445 |
_workers->run_task(&proc_task_proxy); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5446 |
_g1h->set_par_threads(0); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5447 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5448 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5449 |
// Gang task for parallel reference enqueueing. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5450 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5451 |
class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5452 |
typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5453 |
EnqueueTask& _enq_task; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5454 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5455 |
public: |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5456 |
G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5457 |
AbstractGangTask("Enqueue reference objects in parallel"), |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5458 |
_enq_task(enq_task) |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5459 |
{ } |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5460 |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
5461 |
virtual void work(uint worker_id) { |
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
5462 |
_enq_task.work(worker_id); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5463 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5464 |
}; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5465 |
|
18025 | 5466 |
// Driver routine for parallel reference enqueueing. |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5467 |
// Creates an instance of the ref enqueueing gang |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5468 |
// task and has the worker threads execute it. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5469 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5470 |
void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5471 |
assert(_workers != NULL, "Need parallel worker threads."); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5472 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5473 |
G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5474 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5475 |
_g1h->set_par_threads(_active_workers); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5476 |
_workers->run_task(&enq_task_proxy); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5477 |
_g1h->set_par_threads(0); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5478 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5479 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5480 |
// End of weak reference support closures |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5481 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5482 |
// Abstract task used to preserve (i.e. copy) any referent objects |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5483 |
// that are in the collection set and are pointed to by reference |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5484 |
// objects discovered by the CM ref processor. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5485 |
|
4ea0e7d2ffbc
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|
5486 |
class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
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6484982: G1: process references during evacuation pauses
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changeset
|
5487 |
protected: |
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changeset
|
5488 |
G1CollectedHeap* _g1h; |
4ea0e7d2ffbc
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changeset
|
5489 |
RefToScanQueueSet *_queues; |
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changeset
|
5490 |
ParallelTaskTerminator _terminator; |
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|
5491 |
uint _n_workers; |
10670
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changeset
|
5492 |
|
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changeset
|
5493 |
public: |
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changeset
|
5494 |
G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
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changeset
|
5495 |
AbstractGangTask("ParPreserveCMReferents"), |
4ea0e7d2ffbc
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|
5496 |
_g1h(g1h), |
4ea0e7d2ffbc
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changeset
|
5497 |
_queues(task_queues), |
4ea0e7d2ffbc
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changeset
|
5498 |
_terminator(workers, _queues), |
4ea0e7d2ffbc
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changeset
|
5499 |
_n_workers(workers) |
4ea0e7d2ffbc
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changeset
|
5500 |
{ } |
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changeset
|
5501 |
|
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changeset
|
5502 |
void work(uint worker_id) { |
10670
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changeset
|
5503 |
ResourceMark rm; |
4ea0e7d2ffbc
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parents:
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diff
changeset
|
5504 |
HandleMark hm; |
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parents:
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diff
changeset
|
5505 |
|
11396
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changeset
|
5506 |
G1ParScanThreadState pss(_g1h, worker_id); |
10670
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changeset
|
5507 |
G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
4ea0e7d2ffbc
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changeset
|
5508 |
G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
4ea0e7d2ffbc
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changeset
|
5509 |
G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
4ea0e7d2ffbc
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changeset
|
5510 |
|
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changeset
|
5511 |
pss.set_evac_closure(&scan_evac_cl); |
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changeset
|
5512 |
pss.set_evac_failure_closure(&evac_failure_cl); |
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changeset
|
5513 |
pss.set_partial_scan_closure(&partial_scan_cl); |
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changeset
|
5514 |
|
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changeset
|
5515 |
assert(pss.refs()->is_empty(), "both queue and overflow should be empty"); |
4ea0e7d2ffbc
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changeset
|
5516 |
|
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parents:
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diff
changeset
|
5517 |
|
4ea0e7d2ffbc
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changeset
|
5518 |
G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
5519 |
G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
10670
4ea0e7d2ffbc
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changeset
|
5520 |
|
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parents:
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changeset
|
5521 |
G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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changeset
|
5522 |
G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
10670
4ea0e7d2ffbc
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changeset
|
5523 |
|
4ea0e7d2ffbc
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parents:
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changeset
|
5524 |
OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
13728
882756847a04
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coleenp
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changeset
|
5525 |
OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
10670
4ea0e7d2ffbc
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parents:
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changeset
|
5526 |
|
4ea0e7d2ffbc
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changeset
|
5527 |
if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4ea0e7d2ffbc
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changeset
|
5528 |
// We also need to mark copied objects. |
4ea0e7d2ffbc
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parents:
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changeset
|
5529 |
copy_non_heap_cl = ©_mark_non_heap_cl; |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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changeset
|
5530 |
copy_metadata_cl = ©_mark_metadata_cl; |
10670
4ea0e7d2ffbc
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parents:
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changeset
|
5531 |
} |
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parents:
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diff
changeset
|
5532 |
|
4ea0e7d2ffbc
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parents:
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diff
changeset
|
5533 |
// Is alive closure |
4ea0e7d2ffbc
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parents:
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changeset
|
5534 |
G1AlwaysAliveClosure always_alive(_g1h); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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changeset
|
5535 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5536 |
// Copying keep alive closure. Applied to referent objects that need |
4ea0e7d2ffbc
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parents:
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changeset
|
5537 |
// to be copied. |
13728
882756847a04
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coleenp
parents:
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diff
changeset
|
5538 |
G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
10670
4ea0e7d2ffbc
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changeset
|
5539 |
|
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parents:
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changeset
|
5540 |
ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
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parents:
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changeset
|
5541 |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
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diff
changeset
|
5542 |
uint limit = ReferenceProcessor::number_of_subclasses_of_ref() * rp->max_num_q(); |
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
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changeset
|
5543 |
uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
10670
4ea0e7d2ffbc
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changeset
|
5544 |
|
4ea0e7d2ffbc
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parents:
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diff
changeset
|
5545 |
// limit is set using max_num_q() - which was set using ParallelGCThreads. |
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changeset
|
5546 |
// So this must be true - but assert just in case someone decides to |
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changeset
|
5547 |
// change the worker ids. |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
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changeset
|
5548 |
assert(0 <= worker_id && worker_id < limit, "sanity"); |
10670
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changeset
|
5549 |
assert(!rp->discovery_is_atomic(), "check this code"); |
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changeset
|
5550 |
|
4ea0e7d2ffbc
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parents:
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changeset
|
5551 |
// Select discovered lists [i, i+stride, i+2*stride,...,limit) |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
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diff
changeset
|
5552 |
for (uint idx = worker_id; idx < limit; idx += stride) { |
10747
dfdb9eb56e49
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
10746
diff
changeset
|
5553 |
DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
10670
4ea0e7d2ffbc
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changeset
|
5554 |
|
4ea0e7d2ffbc
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diff
changeset
|
5555 |
DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
4ea0e7d2ffbc
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changeset
|
5556 |
while (iter.has_next()) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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changeset
|
5557 |
// Since discovery is not atomic for the CM ref processor, we |
4ea0e7d2ffbc
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changeset
|
5558 |
// can see some null referent objects. |
4ea0e7d2ffbc
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changeset
|
5559 |
iter.load_ptrs(DEBUG_ONLY(true)); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5560 |
oop ref = iter.obj(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5561 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5562 |
// This will filter nulls. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5563 |
if (iter.is_referent_alive()) { |
4ea0e7d2ffbc
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changeset
|
5564 |
iter.make_referent_alive(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5565 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5566 |
iter.move_to_next(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5567 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5568 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5569 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5570 |
// Drain the queue - which may cause stealing |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
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diff
changeset
|
5571 |
G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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changeset
|
5572 |
drain_queue.do_void(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5573 |
// Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5574 |
assert(pss.refs()->is_empty(), "should be"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5575 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5576 |
}; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5577 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5578 |
// Weak Reference processing during an evacuation pause (part 1). |
13926 | 5579 |
void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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changeset
|
5580 |
double ref_proc_start = os::elapsedTime(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5581 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5582 |
ReferenceProcessor* rp = _ref_processor_stw; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5583 |
assert(rp->discovery_enabled(), "should have been enabled"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5584 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5585 |
// Any reference objects, in the collection set, that were 'discovered' |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5586 |
// by the CM ref processor should have already been copied (either by |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5587 |
// applying the external root copy closure to the discovered lists, or |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5588 |
// by following an RSet entry). |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5589 |
// |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5590 |
// But some of the referents, that are in the collection set, that these |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5591 |
// reference objects point to may not have been copied: the STW ref |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5592 |
// processor would have seen that the reference object had already |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5593 |
// been 'discovered' and would have skipped discovering the reference, |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5594 |
// but would not have treated the reference object as a regular oop. |
18025 | 5595 |
// As a result the copy closure would not have been applied to the |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5596 |
// referent object. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5597 |
// |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5598 |
// We need to explicitly copy these referent objects - the references |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5599 |
// will be processed at the end of remarking. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5600 |
// |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5601 |
// We also need to do this copying before we process the reference |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5602 |
// objects discovered by the STW ref processor in case one of these |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5603 |
// referents points to another object which is also referenced by an |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5604 |
// object discovered by the STW ref processor. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5605 |
|
11250 | 5606 |
assert(!G1CollectedHeap::use_parallel_gc_threads() || |
13926 | 5607 |
no_of_gc_workers == workers()->active_workers(), |
5608 |
"Need to reset active GC workers"); |
|
5609 |
||
5610 |
set_par_threads(no_of_gc_workers); |
|
5611 |
G1ParPreserveCMReferentsTask keep_cm_referents(this, |
|
5612 |
no_of_gc_workers, |
|
5613 |
_task_queues); |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5614 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5615 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5616 |
workers()->run_task(&keep_cm_referents); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5617 |
} else { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5618 |
keep_cm_referents.work(0); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5619 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5620 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5621 |
set_par_threads(0); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5622 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5623 |
// Closure to test whether a referent is alive. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5624 |
G1STWIsAliveClosure is_alive(this); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5625 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5626 |
// Even when parallel reference processing is enabled, the processing |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5627 |
// of JNI refs is serial and performed serially by the current thread |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5628 |
// rather than by a worker. The following PSS will be used for processing |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5629 |
// JNI refs. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5630 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5631 |
// Use only a single queue for this PSS. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5632 |
G1ParScanThreadState pss(this, 0); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5633 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5634 |
// We do not embed a reference processor in the copying/scanning |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5635 |
// closures while we're actually processing the discovered |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5636 |
// reference objects. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5637 |
G1ParScanHeapEvacClosure scan_evac_cl(this, &pss, NULL); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5638 |
G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5639 |
G1ParScanPartialArrayClosure partial_scan_cl(this, &pss, NULL); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5640 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5641 |
pss.set_evac_closure(&scan_evac_cl); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5642 |
pss.set_evac_failure_closure(&evac_failure_cl); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5643 |
pss.set_partial_scan_closure(&partial_scan_cl); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5644 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5645 |
assert(pss.refs()->is_empty(), "pre-condition"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5646 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5647 |
G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5648 |
G1ParScanMetadataClosure only_copy_metadata_cl(this, &pss, NULL); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5649 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5650 |
G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5651 |
G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(this, &pss, NULL); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5652 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5653 |
OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5654 |
OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5655 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5656 |
if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5657 |
// We also need to mark copied objects. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5658 |
copy_non_heap_cl = ©_mark_non_heap_cl; |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5659 |
copy_metadata_cl = ©_mark_metadata_cl; |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5660 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5661 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5662 |
// Keep alive closure. |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
5663 |
G1CopyingKeepAliveClosure keep_alive(this, copy_non_heap_cl, copy_metadata_cl, &pss); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5664 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5665 |
// Serial Complete GC closure |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5666 |
G1STWDrainQueueClosure drain_queue(this, &pss); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5667 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5668 |
// Setup the soft refs policy... |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5669 |
rp->setup_policy(false); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5670 |
|
18025 | 5671 |
ReferenceProcessorStats stats; |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5672 |
if (!rp->processing_is_mt()) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5673 |
// Serial reference processing... |
18025 | 5674 |
stats = rp->process_discovered_references(&is_alive, |
5675 |
&keep_alive, |
|
5676 |
&drain_queue, |
|
5677 |
NULL, |
|
5678 |
_gc_timer_stw); |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5679 |
} else { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5680 |
// Parallel reference processing |
13926 | 5681 |
assert(rp->num_q() == no_of_gc_workers, "sanity"); |
5682 |
assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); |
|
5683 |
||
5684 |
G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); |
|
18025 | 5685 |
stats = rp->process_discovered_references(&is_alive, |
5686 |
&keep_alive, |
|
5687 |
&drain_queue, |
|
5688 |
&par_task_executor, |
|
5689 |
_gc_timer_stw); |
|
5690 |
} |
|
5691 |
||
5692 |
_gc_tracer_stw->report_gc_reference_stats(stats); |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5693 |
// We have completed copying any necessary live referent objects |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5694 |
// (that were not copied during the actual pause) so we can |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5695 |
// retire any active alloc buffers |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5696 |
pss.retire_alloc_buffers(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5697 |
assert(pss.refs()->is_empty(), "both queue and overflow should be empty"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5698 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5699 |
double ref_proc_time = os::elapsedTime() - ref_proc_start; |
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
5700 |
g1_policy()->phase_times()->record_ref_proc_time(ref_proc_time * 1000.0); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5701 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5702 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5703 |
// Weak Reference processing during an evacuation pause (part 2). |
13926 | 5704 |
void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5705 |
double ref_enq_start = os::elapsedTime(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5706 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5707 |
ReferenceProcessor* rp = _ref_processor_stw; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5708 |
assert(!rp->discovery_enabled(), "should have been disabled as part of processing"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5709 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5710 |
// Now enqueue any remaining on the discovered lists on to |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5711 |
// the pending list. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5712 |
if (!rp->processing_is_mt()) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5713 |
// Serial reference processing... |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5714 |
rp->enqueue_discovered_references(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5715 |
} else { |
18025 | 5716 |
// Parallel reference enqueueing |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5717 |
|
13926 | 5718 |
assert(no_of_gc_workers == workers()->active_workers(), |
5719 |
"Need to reset active workers"); |
|
5720 |
assert(rp->num_q() == no_of_gc_workers, "sanity"); |
|
5721 |
assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); |
|
5722 |
||
5723 |
G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5724 |
rp->enqueue_discovered_references(&par_task_executor); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5725 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5726 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5727 |
rp->verify_no_references_recorded(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5728 |
assert(!rp->discovery_enabled(), "should have been disabled"); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5729 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5730 |
// FIXME |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5731 |
// CM's reference processing also cleans up the string and symbol tables. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5732 |
// Should we do that here also? We could, but it is a serial operation |
18025 | 5733 |
// and could significantly increase the pause time. |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5734 |
|
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5735 |
double ref_enq_time = os::elapsedTime() - ref_enq_start; |
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
5736 |
g1_policy()->phase_times()->record_ref_enq_time(ref_enq_time * 1000.0); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5737 |
} |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5738 |
|
18025 | 5739 |
void G1CollectedHeap::evacuate_collection_set(EvacuationInfo& evacuation_info) { |
11449
8abed3466567
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
11396
diff
changeset
|
5740 |
_expand_heap_after_alloc_failure = true; |
18025 | 5741 |
_evacuation_failed = false; |
1374 | 5742 |
|
13517
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
5743 |
// Should G1EvacuationFailureALot be in effect for this GC? |
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
5744 |
NOT_PRODUCT(set_evacuation_failure_alot_for_current_gc();) |
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
5745 |
|
1374 | 5746 |
g1_rem_set()->prepare_for_oops_into_collection_set_do(); |
17327
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
5747 |
|
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
5748 |
// Disable the hot card cache. |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
5749 |
G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
5750 |
hot_card_cache->reset_hot_cache_claimed_index(); |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
5751 |
hot_card_cache->set_use_cache(false); |
3589 | 5752 |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
5753 |
uint n_workers; |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5754 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5755 |
n_workers = |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5756 |
AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5757 |
workers()->active_workers(), |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5758 |
Threads::number_of_non_daemon_threads()); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5759 |
assert(UseDynamicNumberOfGCThreads || |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5760 |
n_workers == workers()->total_workers(), |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5761 |
"If not dynamic should be using all the workers"); |
11250 | 5762 |
workers()->set_active_workers(n_workers); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5763 |
set_par_threads(n_workers); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5764 |
} else { |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5765 |
assert(n_par_threads() == 0, |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5766 |
"Should be the original non-parallel value"); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5767 |
n_workers = 1; |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5768 |
} |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5769 |
|
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5770 |
G1ParTask g1_par_task(this, _task_queues); |
1374 | 5771 |
|
5772 |
init_for_evac_failure(NULL); |
|
5773 |
||
5774 |
rem_set()->prepare_for_younger_refs_iterate(true); |
|
2142
032f4652700c
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
2121
diff
changeset
|
5775 |
|
032f4652700c
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
2121
diff
changeset
|
5776 |
assert(dirty_card_queue_set().completed_buffers_num() == 0, "Should be empty"); |
12270
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5777 |
double start_par_time_sec = os::elapsedTime(); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5778 |
double end_par_time_sec; |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5779 |
|
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5780 |
{ |
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3590
diff
changeset
|
5781 |
StrongRootsScope srs(this); |
12270
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5782 |
|
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5783 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5784 |
// The individual threads will set their evac-failure closures. |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5785 |
if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5786 |
// These tasks use ShareHeap::_process_strong_tasks |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5787 |
assert(UseDynamicNumberOfGCThreads || |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5788 |
workers()->active_workers() == workers()->total_workers(), |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5789 |
"If not dynamic should be using all the workers"); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5790 |
workers()->run_task(&g1_par_task); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5791 |
} else { |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5792 |
g1_par_task.set_for_termination(n_workers); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5793 |
g1_par_task.work(0); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5794 |
} |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5795 |
end_par_time_sec = os::elapsedTime(); |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5796 |
|
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5797 |
// Closing the inner scope will execute the destructor |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5798 |
// for the StrongRootsScope object. We record the current |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5799 |
// elapsed time before closing the scope so that time |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5800 |
// taken for the SRS destructor is NOT included in the |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5801 |
// reported parallel time. |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5802 |
} |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5803 |
|
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5804 |
double par_time_ms = (end_par_time_sec - start_par_time_sec) * 1000.0; |
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
5805 |
g1_policy()->phase_times()->record_par_time(par_time_ms); |
12270
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5806 |
|
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5807 |
double code_root_fixup_time_ms = |
9625585c6047
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
12227
diff
changeset
|
5808 |
(os::elapsedTime() - end_par_time_sec) * 1000.0; |
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
5809 |
g1_policy()->phase_times()->record_code_root_fixup_time(code_root_fixup_time_ms); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
5810 |
|
1374 | 5811 |
set_par_threads(0); |
7399
4ecd771fa2d1
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
7398
diff
changeset
|
5812 |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5813 |
// Process any discovered reference objects - we have |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5814 |
// to do this _before_ we retire the GC alloc regions |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5815 |
// as we may have to copy some 'reachable' referent |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5816 |
// objects (and their reachable sub-graphs) that were |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5817 |
// not copied during the pause. |
13926 | 5818 |
process_discovered_references(n_workers); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5819 |
|
7399
4ecd771fa2d1
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
7398
diff
changeset
|
5820 |
// Weak root processing. |
1374 | 5821 |
{ |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5822 |
G1STWIsAliveClosure is_alive(this); |
1374 | 5823 |
G1KeepAliveClosure keep_alive(this); |
5824 |
JNIHandles::weak_oops_do(&is_alive, &keep_alive); |
|
5825 |
} |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5826 |
|
18025 | 5827 |
release_gc_alloc_regions(n_workers, evacuation_info); |
1374 | 5828 |
g1_rem_set()->cleanup_after_oops_into_collection_set_do(); |
2142
032f4652700c
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
2121
diff
changeset
|
5829 |
|
17327
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
5830 |
// Reset and re-enable the hot card cache. |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
5831 |
// Note the counts for the cards in the regions in the |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
5832 |
// collection set are reset when the collection set is freed. |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
5833 |
hot_card_cache->reset_hot_cache(); |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
5834 |
hot_card_cache->set_use_cache(true); |
1374 | 5835 |
|
19339 | 5836 |
// Migrate the strong code roots attached to each region in |
5837 |
// the collection set. Ideally we would like to do this |
|
5838 |
// after we have finished the scanning/evacuation of the |
|
5839 |
// strong code roots for a particular heap region. |
|
5840 |
migrate_strong_code_roots(); |
|
5841 |
||
5842 |
if (g1_policy()->during_initial_mark_pause()) { |
|
5843 |
// Reset the claim values set during marking the strong code roots |
|
5844 |
reset_heap_region_claim_values(); |
|
5845 |
} |
|
5846 |
||
1374 | 5847 |
finalize_for_evac_failure(); |
5848 |
||
5849 |
if (evacuation_failed()) { |
|
5850 |
remove_self_forwarding_pointers(); |
|
13517
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
5851 |
|
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
5852 |
// Reset the G1EvacuationFailureALot counters and flags |
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
5853 |
// Note: the values are reset only when an actual |
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
5854 |
// evacuation failure occurs. |
f158a0c702d4
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
13516
diff
changeset
|
5855 |
NOT_PRODUCT(reset_evacuation_should_fail();) |
1374 | 5856 |
} |
5857 |
||
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5858 |
// Enqueue any remaining references remaining on the STW |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5859 |
// reference processor's discovered lists. We need to do |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5860 |
// this after the card table is cleaned (and verified) as |
18025 | 5861 |
// the act of enqueueing entries on to the pending list |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5862 |
// will log these updates (and dirty their associated |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5863 |
// cards). We need these updates logged to update any |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5864 |
// RSets. |
13926 | 5865 |
enqueue_discovered_references(n_workers); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10664
diff
changeset
|
5866 |
|
2142
032f4652700c
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
2121
diff
changeset
|
5867 |
if (G1DeferredRSUpdate) { |
032f4652700c
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
2121
diff
changeset
|
5868 |
RedirtyLoggedCardTableEntryFastClosure redirty; |
032f4652700c
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
2121
diff
changeset
|
5869 |
dirty_card_queue_set().set_closure(&redirty); |
032f4652700c
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
2121
diff
changeset
|
5870 |
dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
4481 | 5871 |
|
5872 |
DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
|
5873 |
dcq.merge_bufferlists(&dirty_card_queue_set()); |
|
2142
032f4652700c
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
2121
diff
changeset
|
5874 |
assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
032f4652700c
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
2121
diff
changeset
|
5875 |
} |
1374 | 5876 |
COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
5877 |
} |
|
5878 |
||
8072 | 5879 |
void G1CollectedHeap::free_region_if_empty(HeapRegion* hr, |
7923 | 5880 |
size_t* pre_used, |
5881 |
FreeRegionList* free_list, |
|
10996 | 5882 |
OldRegionSet* old_proxy_set, |
7923 | 5883 |
HumongousRegionSet* humongous_proxy_set, |
8072 | 5884 |
HRRSCleanupTask* hrrs_cleanup_task, |
7923 | 5885 |
bool par) { |
5886 |
if (hr->used() > 0 && hr->max_live_bytes() == 0 && !hr->is_young()) { |
|
5887 |
if (hr->isHumongous()) { |
|
5888 |
assert(hr->startsHumongous(), "we should only see starts humongous"); |
|
5889 |
free_humongous_region(hr, pre_used, free_list, humongous_proxy_set, par); |
|
5890 |
} else { |
|
10996 | 5891 |
_old_set.remove_with_proxy(hr, old_proxy_set); |
7923 | 5892 |
free_region(hr, pre_used, free_list, par); |
1374 | 5893 |
} |
8072 | 5894 |
} else { |
5895 |
hr->rem_set()->do_cleanup_work(hrrs_cleanup_task); |
|
1374 | 5896 |
} |
5897 |
} |
|
5898 |
||
7923 | 5899 |
void G1CollectedHeap::free_region(HeapRegion* hr, |
5900 |
size_t* pre_used, |
|
5901 |
FreeRegionList* free_list, |
|
5902 |
bool par) { |
|
5903 |
assert(!hr->isHumongous(), "this is only for non-humongous regions"); |
|
5904 |
assert(!hr->is_empty(), "the region should not be empty"); |
|
5905 |
assert(free_list != NULL, "pre-condition"); |
|
5906 |
||
17327
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
5907 |
// Clear the card counts for this region. |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
5908 |
// Note: we only need to do this if the region is not young |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
5909 |
// (since we don't refine cards in young regions). |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
5910 |
if (!hr->is_young()) { |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
5911 |
_cg1r->hot_card_cache()->reset_card_counts(hr); |
4bd0581aa231
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
17323
diff
changeset
|
5912 |
} |
7923 | 5913 |
*pre_used += hr->used(); |
5914 |
hr->hr_clear(par, true /* clear_space */); |
|
8927
461fa7ee5254
7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end
tonyp
parents:
8688
diff
changeset
|
5915 |
free_list->add_as_head(hr); |
7923 | 5916 |
} |
5917 |
||
5918 |
void G1CollectedHeap::free_humongous_region(HeapRegion* hr, |
|
5919 |
size_t* pre_used, |
|
5920 |
FreeRegionList* free_list, |
|
5921 |
HumongousRegionSet* humongous_proxy_set, |
|
5922 |
bool par) { |
|
5923 |
assert(hr->startsHumongous(), "this is only for starts humongous regions"); |
|
5924 |
assert(free_list != NULL, "pre-condition"); |
|
5925 |
assert(humongous_proxy_set != NULL, "pre-condition"); |
|
5926 |
||
5927 |
size_t hr_used = hr->used(); |
|
5928 |
size_t hr_capacity = hr->capacity(); |
|
5929 |
size_t hr_pre_used = 0; |
|
5930 |
_humongous_set.remove_with_proxy(hr, humongous_proxy_set); |
|
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
5931 |
// We need to read this before we make the region non-humongous, |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
5932 |
// otherwise the information will be gone. |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
5933 |
uint last_index = hr->last_hc_index(); |
7923 | 5934 |
hr->set_notHumongous(); |
5935 |
free_region(hr, &hr_pre_used, free_list, par); |
|
5936 |
||
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
5937 |
uint i = hr->hrs_index() + 1; |
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
5938 |
while (i < last_index) { |
9989 | 5939 |
HeapRegion* curr_hr = region_at(i); |
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13289
diff
changeset
|
5940 |
assert(curr_hr->continuesHumongous(), "invariant"); |
7923 | 5941 |
curr_hr->set_notHumongous(); |
5942 |
free_region(curr_hr, &hr_pre_used, free_list, par); |
|
5943 |
i += 1; |
|
5944 |
} |
|
5945 |
assert(hr_pre_used == hr_used, |
|
5946 |
err_msg("hr_pre_used: "SIZE_FORMAT" and hr_used: "SIZE_FORMAT" " |
|
5947 |
"should be the same", hr_pre_used, hr_used)); |
|
5948 |
*pre_used += hr_pre_used; |
|
5949 |
} |
|
5950 |
||
5951 |
void G1CollectedHeap::update_sets_after_freeing_regions(size_t pre_used, |
|
5952 |
FreeRegionList* free_list, |
|
10996 | 5953 |
OldRegionSet* old_proxy_set, |
7923 | 5954 |
HumongousRegionSet* humongous_proxy_set, |
5955 |
bool par) { |
|
5956 |
if (pre_used > 0) { |
|
5957 |
Mutex* lock = (par) ? ParGCRareEvent_lock : NULL; |
|
1374 | 5958 |
MutexLockerEx x(lock, Mutex::_no_safepoint_check_flag); |
7923 | 5959 |
assert(_summary_bytes_used >= pre_used, |
5960 |
err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" " |
|
5961 |
"should be >= pre_used: "SIZE_FORMAT, |
|
5962 |
_summary_bytes_used, pre_used)); |
|
1374 | 5963 |
_summary_bytes_used -= pre_used; |
7923 | 5964 |
} |
5965 |
if (free_list != NULL && !free_list->is_empty()) { |
|
5966 |
MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
|
8927
461fa7ee5254
7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end
tonyp
parents:
8688
diff
changeset
|
5967 |
_free_list.add_as_head(free_list); |
7923 | 5968 |
} |
10996 | 5969 |
if (old_proxy_set != NULL && !old_proxy_set->is_empty()) { |
5970 |
MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
|
5971 |
_old_set.update_from_proxy(old_proxy_set); |
|
5972 |
} |
|
7923 | 5973 |
if (humongous_proxy_set != NULL && !humongous_proxy_set->is_empty()) { |
5974 |
MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
|
5975 |
_humongous_set.update_from_proxy(humongous_proxy_set); |
|
1374 | 5976 |
} |
5977 |
} |
|
5978 |
||
2883
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
5979 |
class G1ParCleanupCTTask : public AbstractGangTask { |
20309 | 5980 |
G1SATBCardTableModRefBS* _ct_bs; |
2883
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
5981 |
G1CollectedHeap* _g1h; |
3695
421cfcc8843c
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
3691
diff
changeset
|
5982 |
HeapRegion* volatile _su_head; |
2883
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
5983 |
public: |
20309 | 5984 |
G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
5985 |
G1CollectedHeap* g1h) : |
2883
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
5986 |
AbstractGangTask("G1 Par Cleanup CT Task"), |
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
5987 |
_ct_bs(ct_bs), _g1h(g1h) { } |
2883
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
5988 |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
5989 |
void work(uint worker_id) { |
2883
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
5990 |
HeapRegion* r; |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
5991 |
while (r = _g1h->pop_dirty_cards_region()) { |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
5992 |
clear_cards(r); |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
5993 |
} |
3695
421cfcc8843c
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
3691
diff
changeset
|
5994 |
} |
421cfcc8843c
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
3691
diff
changeset
|
5995 |
|
2883
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
5996 |
void clear_cards(HeapRegion* r) { |
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
5997 |
// Cards of the survivors should have already been dirtied. |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
5998 |
if (!r->is_survivor()) { |
2883
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
5999 |
_ct_bs->clear(MemRegion(r->bottom(), r->end())); |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
6000 |
} |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
6001 |
} |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
6002 |
}; |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
6003 |
|
3695
421cfcc8843c
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
3691
diff
changeset
|
6004 |
#ifndef PRODUCT |
421cfcc8843c
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
3691
diff
changeset
|
6005 |
class G1VerifyCardTableCleanup: public HeapRegionClosure { |
9418
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6006 |
G1CollectedHeap* _g1h; |
20309 | 6007 |
G1SATBCardTableModRefBS* _ct_bs; |
3695
421cfcc8843c
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
3691
diff
changeset
|
6008 |
public: |
20309 | 6009 |
G1VerifyCardTableCleanup(G1CollectedHeap* g1h, G1SATBCardTableModRefBS* ct_bs) |
9418
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6010 |
: _g1h(g1h), _ct_bs(ct_bs) { } |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6011 |
virtual bool doHeapRegion(HeapRegion* r) { |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6012 |
if (r->is_survivor()) { |
9418
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6013 |
_g1h->verify_dirty_region(r); |
3695
421cfcc8843c
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
3691
diff
changeset
|
6014 |
} else { |
9418
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6015 |
_g1h->verify_not_dirty_region(r); |
3695
421cfcc8843c
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
3691
diff
changeset
|
6016 |
} |
421cfcc8843c
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
3691
diff
changeset
|
6017 |
return false; |
421cfcc8843c
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
3691
diff
changeset
|
6018 |
} |
421cfcc8843c
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
3691
diff
changeset
|
6019 |
}; |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6020 |
|
9418
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6021 |
void G1CollectedHeap::verify_not_dirty_region(HeapRegion* hr) { |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6022 |
// All of the region should be clean. |
20309 | 6023 |
G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
9418
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6024 |
MemRegion mr(hr->bottom(), hr->end()); |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6025 |
ct_bs->verify_not_dirty_region(mr); |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6026 |
} |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6027 |
|
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6028 |
void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6029 |
// We cannot guarantee that [bottom(),end()] is dirty. Threads |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6030 |
// dirty allocated blocks as they allocate them. The thread that |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6031 |
// retires each region and replaces it with a new one will do a |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6032 |
// maximal allocation to fill in [pre_dummy_top(),end()] but will |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6033 |
// not dirty that area (one less thing to have to do while holding |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6034 |
// a lock). So we can only verify that [bottom(),pre_dummy_top()] |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6035 |
// is dirty. |
20309 | 6036 |
G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
9418
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6037 |
MemRegion mr(hr->bottom(), hr->pre_dummy_top()); |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6038 |
ct_bs->verify_dirty_region(mr); |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6039 |
} |
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6040 |
|
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6041 |
void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
20309 | 6042 |
G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6043 |
for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
9418
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9342
diff
changeset
|
6044 |
verify_dirty_region(hr); |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6045 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6046 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6047 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6048 |
void G1CollectedHeap::verify_dirty_young_regions() { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6049 |
verify_dirty_young_list(_young_list->first_region()); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6050 |
} |
3695
421cfcc8843c
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
3691
diff
changeset
|
6051 |
#endif |
421cfcc8843c
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
3691
diff
changeset
|
6052 |
|
1374 | 6053 |
void G1CollectedHeap::cleanUpCardTable() { |
20309 | 6054 |
G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
1374 | 6055 |
double start = os::elapsedTime(); |
6056 |
||
10770 | 6057 |
{ |
6058 |
// Iterate over the dirty cards region list. |
|
6059 |
G1ParCleanupCTTask cleanup_task(ct_bs, this); |
|
6060 |
||
11250 | 6061 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
6062 |
set_par_threads(); |
|
10770 | 6063 |
workers()->run_task(&cleanup_task); |
6064 |
set_par_threads(0); |
|
6065 |
} else { |
|
6066 |
while (_dirty_cards_region_list) { |
|
6067 |
HeapRegion* r = _dirty_cards_region_list; |
|
6068 |
cleanup_task.clear_cards(r); |
|
6069 |
_dirty_cards_region_list = r->get_next_dirty_cards_region(); |
|
6070 |
if (_dirty_cards_region_list == r) { |
|
6071 |
// The last region. |
|
6072 |
_dirty_cards_region_list = NULL; |
|
6073 |
} |
|
6074 |
r->set_next_dirty_cards_region(NULL); |
|
2883
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
6075 |
} |
406d1e6d1aa1
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
2881
diff
changeset
|
6076 |
} |
10770 | 6077 |
#ifndef PRODUCT |
6078 |
if (G1VerifyCTCleanup || VerifyAfterGC) { |
|
6079 |
G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); |
|
6080 |
heap_region_iterate(&cleanup_verifier); |
|
6081 |
} |
|
6082 |
#endif |
|
3695
421cfcc8843c
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
3691
diff
changeset
|
6083 |
} |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6084 |
|
1374 | 6085 |
double elapsed = os::elapsedTime() - start; |
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
6086 |
g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
1374 | 6087 |
} |
6088 |
||
18025 | 6089 |
void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
7923 | 6090 |
size_t pre_used = 0; |
6091 |
FreeRegionList local_free_list("Local List for CSet Freeing"); |
|
6092 |
||
1374 | 6093 |
double young_time_ms = 0.0; |
6094 |
double non_young_time_ms = 0.0; |
|
6095 |
||
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6096 |
// Since the collection set is a superset of the the young list, |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6097 |
// all we need to do to clear the young list is clear its |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6098 |
// head and length, and unlink any young regions in the code below |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6099 |
_young_list->clear(); |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6100 |
|
1374 | 6101 |
G1CollectorPolicy* policy = g1_policy(); |
6102 |
||
6103 |
double start_sec = os::elapsedTime(); |
|
6104 |
bool non_young = true; |
|
6105 |
||
6106 |
HeapRegion* cur = cs_head; |
|
6107 |
int age_bound = -1; |
|
6108 |
size_t rs_lengths = 0; |
|
6109 |
||
6110 |
while (cur != NULL) { |
|
8680 | 6111 |
assert(!is_on_master_free_list(cur), "sanity"); |
1374 | 6112 |
if (non_young) { |
6113 |
if (cur->is_young()) { |
|
6114 |
double end_sec = os::elapsedTime(); |
|
6115 |
double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
6116 |
non_young_time_ms += elapsed_ms; |
|
6117 |
||
6118 |
start_sec = os::elapsedTime(); |
|
6119 |
non_young = false; |
|
6120 |
} |
|
6121 |
} else { |
|
11176
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
6122 |
if (!cur->is_young()) { |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
6123 |
double end_sec = os::elapsedTime(); |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
6124 |
double elapsed_ms = (end_sec - start_sec) * 1000.0; |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
6125 |
young_time_ms += elapsed_ms; |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
6126 |
|
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
6127 |
start_sec = os::elapsedTime(); |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
6128 |
non_young = true; |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
6129 |
} |
1374 | 6130 |
} |
6131 |
||
6132 |
rs_lengths += cur->rem_set()->occupied(); |
|
6133 |
||
6134 |
HeapRegion* next = cur->next_in_collection_set(); |
|
6135 |
assert(cur->in_collection_set(), "bad CS"); |
|
6136 |
cur->set_next_in_collection_set(NULL); |
|
6137 |
cur->set_in_collection_set(false); |
|
6138 |
||
6139 |
if (cur->is_young()) { |
|
6140 |
int index = cur->young_index_in_cset(); |
|
11169
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10997
diff
changeset
|
6141 |
assert(index != -1, "invariant"); |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
6142 |
assert((uint) index < policy->young_cset_region_length(), "invariant"); |
1374 | 6143 |
size_t words_survived = _surviving_young_words[index]; |
6144 |
cur->record_surv_words_in_group(words_survived); |
|
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6145 |
|
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6146 |
// At this point the we have 'popped' cur from the collection set |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6147 |
// (linked via next_in_collection_set()) but it is still in the |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6148 |
// young list (linked via next_young_region()). Clear the |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6149 |
// _next_young_region field. |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6150 |
cur->set_next_young_region(NULL); |
1374 | 6151 |
} else { |
6152 |
int index = cur->young_index_in_cset(); |
|
11169
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10997
diff
changeset
|
6153 |
assert(index == -1, "invariant"); |
1374 | 6154 |
} |
6155 |
||
6156 |
assert( (cur->is_young() && cur->young_index_in_cset() > -1) || |
|
6157 |
(!cur->is_young() && cur->young_index_in_cset() == -1), |
|
6158 |
"invariant" ); |
|
6159 |
||
6160 |
if (!cur->evacuation_failed()) { |
|
11176
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
6161 |
MemRegion used_mr = cur->used_region(); |
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
6162 |
|
1374 | 6163 |
// And the region is empty. |
11176
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
6164 |
assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
7923 | 6165 |
free_region(cur, &pre_used, &local_free_list, false /* par */); |
1374 | 6166 |
} else { |
6167 |
cur->uninstall_surv_rate_group(); |
|
11169
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10997
diff
changeset
|
6168 |
if (cur->is_young()) { |
1374 | 6169 |
cur->set_young_index_in_cset(-1); |
11169
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10997
diff
changeset
|
6170 |
} |
1374 | 6171 |
cur->set_not_young(); |
6172 |
cur->set_evacuation_failed(false); |
|
10996 | 6173 |
// The region is now considered to be old. |
6174 |
_old_set.add(cur); |
|
18025 | 6175 |
evacuation_info.increment_collectionset_used_after(cur->used()); |
1374 | 6176 |
} |
6177 |
cur = next; |
|
6178 |
} |
|
6179 |
||
18025 | 6180 |
evacuation_info.set_regions_freed(local_free_list.length()); |
1374 | 6181 |
policy->record_max_rs_lengths(rs_lengths); |
6182 |
policy->cset_regions_freed(); |
|
6183 |
||
6184 |
double end_sec = os::elapsedTime(); |
|
6185 |
double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
11176
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
6186 |
|
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
6187 |
if (non_young) { |
1374 | 6188 |
non_young_time_ms += elapsed_ms; |
11176
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
6189 |
} else { |
1374 | 6190 |
young_time_ms += elapsed_ms; |
11176
9bb1ddd8da51
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
11174
diff
changeset
|
6191 |
} |
1374 | 6192 |
|
7923 | 6193 |
update_sets_after_freeing_regions(pre_used, &local_free_list, |
10996 | 6194 |
NULL /* old_proxy_set */, |
7923 | 6195 |
NULL /* humongous_proxy_set */, |
6196 |
false /* par */); |
|
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
6197 |
policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
13113
diff
changeset
|
6198 |
policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
1374 | 6199 |
} |
6200 |
||
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6201 |
// This routine is similar to the above but does not record |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6202 |
// any policy statistics or update free lists; we are abandoning |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6203 |
// the current incremental collection set in preparation of a |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6204 |
// full collection. After the full GC we will start to build up |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6205 |
// the incremental collection set again. |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6206 |
// This is only called when we're doing a full collection |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6207 |
// and is immediately followed by the tearing down of the young list. |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6208 |
|
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6209 |
void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6210 |
HeapRegion* cur = cs_head; |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6211 |
|
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6212 |
while (cur != NULL) { |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6213 |
HeapRegion* next = cur->next_in_collection_set(); |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6214 |
assert(cur->in_collection_set(), "bad CS"); |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6215 |
cur->set_next_in_collection_set(NULL); |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6216 |
cur->set_in_collection_set(false); |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6217 |
cur->set_young_index_in_cset(-1); |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6218 |
cur = next; |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6219 |
} |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6220 |
} |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6221 |
|
7923 | 6222 |
void G1CollectedHeap::set_free_regions_coming() { |
6223 |
if (G1ConcRegionFreeingVerbose) { |
|
6224 |
gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " |
|
6225 |
"setting free regions coming"); |
|
6226 |
} |
|
6227 |
||
6228 |
assert(!free_regions_coming(), "pre-condition"); |
|
6229 |
_free_regions_coming = true; |
|
1374 | 6230 |
} |
6231 |
||
7923 | 6232 |
void G1CollectedHeap::reset_free_regions_coming() { |
11584
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
6233 |
assert(free_regions_coming(), "pre-condition"); |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
6234 |
|
7923 | 6235 |
{ |
6236 |
MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
|
6237 |
_free_regions_coming = false; |
|
6238 |
SecondaryFreeList_lock->notify_all(); |
|
6239 |
} |
|
6240 |
||
6241 |
if (G1ConcRegionFreeingVerbose) { |
|
6242 |
gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " |
|
6243 |
"reset free regions coming"); |
|
1374 | 6244 |
} |
6245 |
} |
|
6246 |
||
7923 | 6247 |
void G1CollectedHeap::wait_while_free_regions_coming() { |
6248 |
// Most of the time we won't have to wait, so let's do a quick test |
|
6249 |
// first before we take the lock. |
|
6250 |
if (!free_regions_coming()) { |
|
6251 |
return; |
|
6252 |
} |
|
6253 |
||
6254 |
if (G1ConcRegionFreeingVerbose) { |
|
6255 |
gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " |
|
6256 |
"waiting for free regions"); |
|
1374 | 6257 |
} |
6258 |
||
6259 |
{ |
|
7923 | 6260 |
MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
6261 |
while (free_regions_coming()) { |
|
6262 |
SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); |
|
1374 | 6263 |
} |
7923 | 6264 |
} |
6265 |
||
6266 |
if (G1ConcRegionFreeingVerbose) { |
|
6267 |
gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " |
|
6268 |
"done waiting for free regions"); |
|
6269 |
} |
|
1374 | 6270 |
} |
6271 |
||
6272 |
void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { |
|
6273 |
assert(heap_lock_held_for_gc(), |
|
6274 |
"the heap lock should already be held by or for this thread"); |
|
6275 |
_young_list->push_region(hr); |
|
6276 |
} |
|
6277 |
||
6278 |
class NoYoungRegionsClosure: public HeapRegionClosure { |
|
6279 |
private: |
|
6280 |
bool _success; |
|
6281 |
public: |
|
6282 |
NoYoungRegionsClosure() : _success(true) { } |
|
6283 |
bool doHeapRegion(HeapRegion* r) { |
|
6284 |
if (r->is_young()) { |
|
6285 |
gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", |
|
6286 |
r->bottom(), r->end()); |
|
6287 |
_success = false; |
|
6288 |
} |
|
6289 |
return false; |
|
6290 |
} |
|
6291 |
bool success() { return _success; } |
|
6292 |
}; |
|
6293 |
||
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6294 |
bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6295 |
bool ret = _young_list->check_list_empty(check_sample); |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6296 |
|
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
6297 |
if (check_heap) { |
1374 | 6298 |
NoYoungRegionsClosure closure; |
6299 |
heap_region_iterate(&closure); |
|
6300 |
ret = ret && closure.success(); |
|
6301 |
} |
|
6302 |
||
6303 |
return ret; |
|
6304 |
} |
|
6305 |
||
10996 | 6306 |
class TearDownRegionSetsClosure : public HeapRegionClosure { |
6307 |
private: |
|
6308 |
OldRegionSet *_old_set; |
|
7923 | 6309 |
|
1374 | 6310 |
public: |
10996 | 6311 |
TearDownRegionSetsClosure(OldRegionSet* old_set) : _old_set(old_set) { } |
7923 | 6312 |
|
1374 | 6313 |
bool doHeapRegion(HeapRegion* r) { |
10996 | 6314 |
if (r->is_empty()) { |
6315 |
// We ignore empty regions, we'll empty the free list afterwards |
|
6316 |
} else if (r->is_young()) { |
|
6317 |
// We ignore young regions, we'll empty the young list afterwards |
|
6318 |
} else if (r->isHumongous()) { |
|
6319 |
// We ignore humongous regions, we're not tearing down the |
|
6320 |
// humongous region set |
|
1374 | 6321 |
} else { |
10996 | 6322 |
// The rest should be old |
6323 |
_old_set->remove(r); |
|
1374 | 6324 |
} |
6325 |
return false; |
|
6326 |
} |
|
6327 |
||
10996 | 6328 |
~TearDownRegionSetsClosure() { |
6329 |
assert(_old_set->is_empty(), "post-condition"); |
|
7923 | 6330 |
} |
1374 | 6331 |
}; |
6332 |
||
10996 | 6333 |
void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
6334 |
assert_at_safepoint(true /* should_be_vm_thread */); |
|
6335 |
||
6336 |
if (!free_list_only) { |
|
6337 |
TearDownRegionSetsClosure cl(&_old_set); |
|
6338 |
heap_region_iterate(&cl); |
|
6339 |
||
6340 |
// Need to do this after the heap iteration to be able to |
|
6341 |
// recognize the young regions and ignore them during the iteration. |
|
6342 |
_young_list->empty_list(); |
|
6343 |
} |
|
6344 |
_free_list.remove_all(); |
|
6345 |
} |
|
6346 |
||
6347 |
class RebuildRegionSetsClosure : public HeapRegionClosure { |
|
6348 |
private: |
|
6349 |
bool _free_list_only; |
|
6350 |
OldRegionSet* _old_set; |
|
6351 |
FreeRegionList* _free_list; |
|
6352 |
size_t _total_used; |
|
6353 |
||
6354 |
public: |
|
6355 |
RebuildRegionSetsClosure(bool free_list_only, |
|
6356 |
OldRegionSet* old_set, FreeRegionList* free_list) : |
|
6357 |
_free_list_only(free_list_only), |
|
6358 |
_old_set(old_set), _free_list(free_list), _total_used(0) { |
|
6359 |
assert(_free_list->is_empty(), "pre-condition"); |
|
6360 |
if (!free_list_only) { |
|
6361 |
assert(_old_set->is_empty(), "pre-condition"); |
|
6362 |
} |
|
6363 |
} |
|
6364 |
||
6365 |
bool doHeapRegion(HeapRegion* r) { |
|
6366 |
if (r->continuesHumongous()) { |
|
6367 |
return false; |
|
6368 |
} |
|
6369 |
||
6370 |
if (r->is_empty()) { |
|
6371 |
// Add free regions to the free list |
|
6372 |
_free_list->add_as_tail(r); |
|
6373 |
} else if (!_free_list_only) { |
|
6374 |
assert(!r->is_young(), "we should not come across young regions"); |
|
6375 |
||
6376 |
if (r->isHumongous()) { |
|
6377 |
// We ignore humongous regions, we left the humongous set unchanged |
|
6378 |
} else { |
|
6379 |
// The rest should be old, add them to the old set |
|
6380 |
_old_set->add(r); |
|
6381 |
} |
|
6382 |
_total_used += r->used(); |
|
6383 |
} |
|
6384 |
||
6385 |
return false; |
|
6386 |
} |
|
6387 |
||
6388 |
size_t total_used() { |
|
6389 |
return _total_used; |
|
6390 |
} |
|
6391 |
}; |
|
6392 |
||
6393 |
void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { |
|
6394 |
assert_at_safepoint(true /* should_be_vm_thread */); |
|
6395 |
||
6396 |
RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); |
|
6397 |
heap_region_iterate(&cl); |
|
6398 |
||
6399 |
if (!free_list_only) { |
|
6400 |
_summary_bytes_used = cl.total_used(); |
|
6401 |
} |
|
6402 |
assert(_summary_bytes_used == recalculate_used(), |
|
6403 |
err_msg("inconsistent _summary_bytes_used, " |
|
6404 |
"value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, |
|
6405 |
_summary_bytes_used, recalculate_used())); |
|
1374 | 6406 |
} |
6407 |
||
6408 |
void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { |
|
6409 |
_refine_cte_cl->set_concurrent(concurrent); |
|
6410 |
} |
|
6411 |
||
6412 |
bool G1CollectedHeap::is_in_closed_subset(const void* p) const { |
|
6413 |
HeapRegion* hr = heap_region_containing(p); |
|
6414 |
if (hr == NULL) { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13517
diff
changeset
|
6415 |
return false; |
1374 | 6416 |
} else { |
6417 |
return hr->is_in(p); |
|
6418 |
} |
|
6419 |
} |
|
7923 | 6420 |
|
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6421 |
// Methods for the mutator alloc region |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6422 |
|
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6423 |
HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6424 |
bool force) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6425 |
assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6426 |
assert(!force || g1_policy()->can_expand_young_list(), |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6427 |
"if force is true we should be able to expand the young list"); |
10001
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
6428 |
bool young_list_full = g1_policy()->is_young_list_full(); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
6429 |
if (force || !young_list_full) { |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6430 |
HeapRegion* new_alloc_region = new_region(word_size, |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6431 |
false /* do_expand */); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6432 |
if (new_alloc_region != NULL) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6433 |
set_region_short_lived_locked(new_alloc_region); |
10001
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
6434 |
_hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6435 |
return new_alloc_region; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6436 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6437 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6438 |
return NULL; |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6439 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6440 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6441 |
void G1CollectedHeap::retire_mutator_alloc_region(HeapRegion* alloc_region, |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6442 |
size_t allocated_bytes) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6443 |
assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6444 |
assert(alloc_region->is_young(), "all mutator alloc regions should be young"); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6445 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6446 |
g1_policy()->add_region_to_incremental_cset_lhs(alloc_region); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6447 |
_summary_bytes_used += allocated_bytes; |
10001
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
10000
diff
changeset
|
6448 |
_hr_printer.retire(alloc_region); |
10671
431ff8629f97
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
10670
diff
changeset
|
6449 |
// We update the eden sizes here, when the region is retired, |
431ff8629f97
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
10670
diff
changeset
|
6450 |
// instead of when it's allocated, since this is the point that its |
431ff8629f97
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
10670
diff
changeset
|
6451 |
// used space has been recored in _summary_bytes_used. |
431ff8629f97
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
10670
diff
changeset
|
6452 |
g1mm()->update_eden_size(); |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6453 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6454 |
|
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6455 |
HeapRegion* MutatorAllocRegion::allocate_new_region(size_t word_size, |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6456 |
bool force) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6457 |
return _g1h->new_mutator_alloc_region(word_size, force); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6458 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6459 |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
6460 |
void G1CollectedHeap::set_par_threads() { |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
6461 |
// Don't change the number of workers. Use the value previously set |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
6462 |
// in the workgroup. |
11250 | 6463 |
assert(G1CollectedHeap::use_parallel_gc_threads(), "shouldn't be here otherwise"); |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
6464 |
uint n_workers = workers()->active_workers(); |
11250 | 6465 |
assert(UseDynamicNumberOfGCThreads || |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
6466 |
n_workers == workers()->total_workers(), |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
6467 |
"Otherwise should be using the total number of workers"); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
6468 |
if (n_workers == 0) { |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
6469 |
assert(false, "Should have been set in prior evacuation pause."); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
6470 |
n_workers = ParallelGCThreads; |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
6471 |
workers()->set_active_workers(n_workers); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
6472 |
} |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
6473 |
set_par_threads(n_workers); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
6474 |
} |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11169
diff
changeset
|
6475 |
|
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6476 |
void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6477 |
size_t allocated_bytes) { |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6478 |
_g1h->retire_mutator_alloc_region(alloc_region, allocated_bytes); |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6479 |
} |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6480 |
|
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6481 |
// Methods for the GC alloc regions |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6482 |
|
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6483 |
HeapRegion* G1CollectedHeap::new_gc_alloc_region(size_t word_size, |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
6484 |
uint count, |
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6485 |
GCAllocPurpose ap) { |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6486 |
assert(FreeList_lock->owned_by_self(), "pre-condition"); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6487 |
|
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6488 |
if (count < g1_policy()->max_regions(ap)) { |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6489 |
HeapRegion* new_alloc_region = new_region(word_size, |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6490 |
true /* do_expand */); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6491 |
if (new_alloc_region != NULL) { |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6492 |
// We really only need to do this for old regions given that we |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6493 |
// should never scan survivors. But it doesn't hurt to do it |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6494 |
// for survivors too. |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6495 |
new_alloc_region->set_saved_mark(); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6496 |
if (ap == GCAllocForSurvived) { |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6497 |
new_alloc_region->set_survivor(); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6498 |
_hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6499 |
} else { |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6500 |
_hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6501 |
} |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
6502 |
bool during_im = g1_policy()->during_initial_mark_pause(); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
6503 |
new_alloc_region->note_start_of_copying(during_im); |
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6504 |
return new_alloc_region; |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6505 |
} else { |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6506 |
g1_policy()->note_alloc_region_limit_reached(ap); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6507 |
} |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6508 |
} |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6509 |
return NULL; |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6510 |
} |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6511 |
|
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6512 |
void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6513 |
size_t allocated_bytes, |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6514 |
GCAllocPurpose ap) { |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
6515 |
bool during_im = g1_policy()->during_initial_mark_pause(); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11453
diff
changeset
|
6516 |
alloc_region->note_end_of_copying(during_im); |
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6517 |
g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6518 |
if (ap == GCAllocForSurvived) { |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6519 |
young_list()->add_survivor_region(alloc_region); |
10996 | 6520 |
} else { |
6521 |
_old_set.add(alloc_region); |
|
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6522 |
} |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6523 |
_hr_printer.retire(alloc_region); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6524 |
} |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6525 |
|
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6526 |
HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6527 |
bool force) { |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6528 |
assert(!force, "not supported for GC alloc regions"); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6529 |
return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6530 |
} |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6531 |
|
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6532 |
void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6533 |
size_t allocated_bytes) { |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6534 |
_g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6535 |
GCAllocForSurvived); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6536 |
} |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6537 |
|
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6538 |
HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6539 |
bool force) { |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6540 |
assert(!force, "not supported for GC alloc regions"); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6541 |
return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6542 |
} |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6543 |
|
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6544 |
void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6545 |
size_t allocated_bytes) { |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6546 |
_g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6547 |
GCAllocForTenured); |
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10237
diff
changeset
|
6548 |
} |
8928
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6549 |
// Heap region set verification |
e5c53268bef5
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
8927
diff
changeset
|
6550 |
|
7923 | 6551 |
class VerifyRegionListsClosure : public HeapRegionClosure { |
6552 |
private: |
|
10996 | 6553 |
FreeRegionList* _free_list; |
6554 |
OldRegionSet* _old_set; |
|
7923 | 6555 |
HumongousRegionSet* _humongous_set; |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
6556 |
uint _region_count; |
7923 | 6557 |
|
6558 |
public: |
|
10996 | 6559 |
VerifyRegionListsClosure(OldRegionSet* old_set, |
6560 |
HumongousRegionSet* humongous_set, |
|
7923 | 6561 |
FreeRegionList* free_list) : |
10996 | 6562 |
_old_set(old_set), _humongous_set(humongous_set), |
6563 |
_free_list(free_list), _region_count(0) { } |
|
7923 | 6564 |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
6565 |
uint region_count() { return _region_count; } |
7923 | 6566 |
|
6567 |
bool doHeapRegion(HeapRegion* hr) { |
|
6568 |
_region_count += 1; |
|
6569 |
||
6570 |
if (hr->continuesHumongous()) { |
|
6571 |
return false; |
|
6572 |
} |
|
6573 |
||
6574 |
if (hr->is_young()) { |
|
6575 |
// TODO |
|
6576 |
} else if (hr->startsHumongous()) { |
|
6577 |
_humongous_set->verify_next_region(hr); |
|
6578 |
} else if (hr->is_empty()) { |
|
6579 |
_free_list->verify_next_region(hr); |
|
10996 | 6580 |
} else { |
6581 |
_old_set->verify_next_region(hr); |
|
7923 | 6582 |
} |
6583 |
return false; |
|
6584 |
} |
|
6585 |
}; |
|
6586 |
||
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
6587 |
HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
9989 | 6588 |
HeapWord* bottom) { |
6589 |
HeapWord* end = bottom + HeapRegion::GrainWords; |
|
6590 |
MemRegion mr(bottom, end); |
|
6591 |
assert(_g1_reserved.contains(mr), "invariant"); |
|
6592 |
// This might return NULL if the allocation fails |
|
13756
3b72f3da8cd4
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
13754
diff
changeset
|
6593 |
return new HeapRegion(hrs_index, _bot_shared, mr); |
9989 | 6594 |
} |
6595 |
||
7923 | 6596 |
void G1CollectedHeap::verify_region_sets() { |
6597 |
assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
6598 |
||
6599 |
// First, check the explicit lists. |
|
6600 |
_free_list.verify(); |
|
6601 |
{ |
|
6602 |
// Given that a concurrent operation might be adding regions to |
|
6603 |
// the secondary free list we have to take the lock before |
|
6604 |
// verifying it. |
|
6605 |
MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
|
6606 |
_secondary_free_list.verify(); |
|
6607 |
} |
|
10996 | 6608 |
_old_set.verify(); |
7923 | 6609 |
_humongous_set.verify(); |
6610 |
||
6611 |
// If a concurrent region freeing operation is in progress it will |
|
6612 |
// be difficult to correctly attributed any free regions we come |
|
6613 |
// across to the correct free list given that they might belong to |
|
6614 |
// one of several (free_list, secondary_free_list, any local lists, |
|
6615 |
// etc.). So, if that's the case we will skip the rest of the |
|
6616 |
// verification operation. Alternatively, waiting for the concurrent |
|
6617 |
// operation to complete will have a non-trivial effect on the GC's |
|
6618 |
// operation (no concurrent operation will last longer than the |
|
6619 |
// interval between two calls to verification) and it might hide |
|
6620 |
// any issues that we would like to catch during testing. |
|
6621 |
if (free_regions_coming()) { |
|
6622 |
return; |
|
6623 |
} |
|
6624 |
||
8680 | 6625 |
// Make sure we append the secondary_free_list on the free_list so |
6626 |
// that all free regions we will come across can be safely |
|
6627 |
// attributed to the free_list. |
|
6628 |
append_secondary_free_list_if_not_empty_with_lock(); |
|
7923 | 6629 |
|
6630 |
// Finally, make sure that the region accounting in the lists is |
|
6631 |
// consistent with what we see in the heap. |
|
10996 | 6632 |
_old_set.verify_start(); |
7923 | 6633 |
_humongous_set.verify_start(); |
6634 |
_free_list.verify_start(); |
|
6635 |
||
10996 | 6636 |
VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
7923 | 6637 |
heap_region_iterate(&cl); |
6638 |
||
10996 | 6639 |
_old_set.verify_end(); |
7923 | 6640 |
_humongous_set.verify_end(); |
6641 |
_free_list.verify_end(); |
|
1374 | 6642 |
} |
19339 | 6643 |
|
6644 |
// Optimized nmethod scanning |
|
6645 |
||
6646 |
class RegisterNMethodOopClosure: public OopClosure { |
|
6647 |
G1CollectedHeap* _g1h; |
|
6648 |
nmethod* _nm; |
|
6649 |
||
6650 |
template <class T> void do_oop_work(T* p) { |
|
6651 |
T heap_oop = oopDesc::load_heap_oop(p); |
|
6652 |
if (!oopDesc::is_null(heap_oop)) { |
|
6653 |
oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
6654 |
HeapRegion* hr = _g1h->heap_region_containing(obj); |
|
6655 |
assert(!hr->isHumongous(), "code root in humongous region?"); |
|
6656 |
||
6657 |
// HeapRegion::add_strong_code_root() avoids adding duplicate |
|
6658 |
// entries but having duplicates is OK since we "mark" nmethods |
|
6659 |
// as visited when we scan the strong code root lists during the GC. |
|
6660 |
hr->add_strong_code_root(_nm); |
|
6661 |
assert(hr->rem_set()->strong_code_roots_list_contains(_nm), "add failed?"); |
|
6662 |
} |
|
6663 |
} |
|
6664 |
||
6665 |
public: |
|
6666 |
RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : |
|
6667 |
_g1h(g1h), _nm(nm) {} |
|
6668 |
||
6669 |
void do_oop(oop* p) { do_oop_work(p); } |
|
6670 |
void do_oop(narrowOop* p) { do_oop_work(p); } |
|
6671 |
}; |
|
6672 |
||
6673 |
class UnregisterNMethodOopClosure: public OopClosure { |
|
6674 |
G1CollectedHeap* _g1h; |
|
6675 |
nmethod* _nm; |
|
6676 |
||
6677 |
template <class T> void do_oop_work(T* p) { |
|
6678 |
T heap_oop = oopDesc::load_heap_oop(p); |
|
6679 |
if (!oopDesc::is_null(heap_oop)) { |
|
6680 |
oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
6681 |
HeapRegion* hr = _g1h->heap_region_containing(obj); |
|
6682 |
assert(!hr->isHumongous(), "code root in humongous region?"); |
|
6683 |
hr->remove_strong_code_root(_nm); |
|
6684 |
assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), "remove failed?"); |
|
6685 |
} |
|
6686 |
} |
|
6687 |
||
6688 |
public: |
|
6689 |
UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : |
|
6690 |
_g1h(g1h), _nm(nm) {} |
|
6691 |
||
6692 |
void do_oop(oop* p) { do_oop_work(p); } |
|
6693 |
void do_oop(narrowOop* p) { do_oop_work(p); } |
|
6694 |
}; |
|
6695 |
||
6696 |
void G1CollectedHeap::register_nmethod(nmethod* nm) { |
|
6697 |
CollectedHeap::register_nmethod(nm); |
|
6698 |
||
6699 |
guarantee(nm != NULL, "sanity"); |
|
6700 |
RegisterNMethodOopClosure reg_cl(this, nm); |
|
6701 |
nm->oops_do(®_cl); |
|
6702 |
} |
|
6703 |
||
6704 |
void G1CollectedHeap::unregister_nmethod(nmethod* nm) { |
|
6705 |
CollectedHeap::unregister_nmethod(nm); |
|
6706 |
||
6707 |
guarantee(nm != NULL, "sanity"); |
|
6708 |
UnregisterNMethodOopClosure reg_cl(this, nm); |
|
6709 |
nm->oops_do(®_cl, true); |
|
6710 |
} |
|
6711 |
||
6712 |
class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure { |
|
6713 |
public: |
|
6714 |
bool doHeapRegion(HeapRegion *hr) { |
|
6715 |
assert(!hr->isHumongous(), "humongous region in collection set?"); |
|
6716 |
hr->migrate_strong_code_roots(); |
|
6717 |
return false; |
|
6718 |
} |
|
6719 |
}; |
|
6720 |
||
6721 |
void G1CollectedHeap::migrate_strong_code_roots() { |
|
6722 |
MigrateCodeRootsHeapRegionClosure cl; |
|
6723 |
double migrate_start = os::elapsedTime(); |
|
6724 |
collection_set_iterate(&cl); |
|
6725 |
double migration_time_ms = (os::elapsedTime() - migrate_start) * 1000.0; |
|
6726 |
g1_policy()->phase_times()->record_strong_code_root_migration_time(migration_time_ms); |
|
6727 |
} |
|
6728 |
||
6729 |
// Mark all the code roots that point into regions *not* in the |
|
6730 |
// collection set. |
|
6731 |
// |
|
6732 |
// Note we do not want to use a "marking" CodeBlobToOopClosure while |
|
6733 |
// walking the the code roots lists of regions not in the collection |
|
6734 |
// set. Suppose we have an nmethod (M) that points to objects in two |
|
6735 |
// separate regions - one in the collection set (R1) and one not (R2). |
|
6736 |
// Using a "marking" CodeBlobToOopClosure here would result in "marking" |
|
6737 |
// nmethod M when walking the code roots for R1. When we come to scan |
|
6738 |
// the code roots for R2, we would see that M is already marked and it |
|
6739 |
// would be skipped and the objects in R2 that are referenced from M |
|
6740 |
// would not be evacuated. |
|
6741 |
||
6742 |
class MarkStrongCodeRootCodeBlobClosure: public CodeBlobClosure { |
|
6743 |
||
6744 |
class MarkStrongCodeRootOopClosure: public OopClosure { |
|
6745 |
ConcurrentMark* _cm; |
|
6746 |
HeapRegion* _hr; |
|
6747 |
uint _worker_id; |
|
6748 |
||
6749 |
template <class T> void do_oop_work(T* p) { |
|
6750 |
T heap_oop = oopDesc::load_heap_oop(p); |
|
6751 |
if (!oopDesc::is_null(heap_oop)) { |
|
6752 |
oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
6753 |
// Only mark objects in the region (which is assumed |
|
6754 |
// to be not in the collection set). |
|
6755 |
if (_hr->is_in(obj)) { |
|
6756 |
_cm->grayRoot(obj, (size_t) obj->size(), _worker_id); |
|
6757 |
} |
|
6758 |
} |
|
6759 |
} |
|
6760 |
||
6761 |
public: |
|
6762 |
MarkStrongCodeRootOopClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id) : |
|
6763 |
_cm(cm), _hr(hr), _worker_id(worker_id) { |
|
6764 |
assert(!_hr->in_collection_set(), "sanity"); |
|
6765 |
} |
|
6766 |
||
6767 |
void do_oop(narrowOop* p) { do_oop_work(p); } |
|
6768 |
void do_oop(oop* p) { do_oop_work(p); } |
|
6769 |
}; |
|
6770 |
||
6771 |
MarkStrongCodeRootOopClosure _oop_cl; |
|
6772 |
||
6773 |
public: |
|
6774 |
MarkStrongCodeRootCodeBlobClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id): |
|
6775 |
_oop_cl(cm, hr, worker_id) {} |
|
6776 |
||
6777 |
void do_code_blob(CodeBlob* cb) { |
|
6778 |
nmethod* nm = (cb == NULL) ? NULL : cb->as_nmethod_or_null(); |
|
6779 |
if (nm != NULL) { |
|
6780 |
nm->oops_do(&_oop_cl); |
|
6781 |
} |
|
6782 |
} |
|
6783 |
}; |
|
6784 |
||
6785 |
class MarkStrongCodeRootsHRClosure: public HeapRegionClosure { |
|
6786 |
G1CollectedHeap* _g1h; |
|
6787 |
uint _worker_id; |
|
6788 |
||
6789 |
public: |
|
6790 |
MarkStrongCodeRootsHRClosure(G1CollectedHeap* g1h, uint worker_id) : |
|
6791 |
_g1h(g1h), _worker_id(worker_id) {} |
|
6792 |
||
6793 |
bool doHeapRegion(HeapRegion *hr) { |
|
6794 |
HeapRegionRemSet* hrrs = hr->rem_set(); |
|
6795 |
if (hr->isHumongous()) { |
|
6796 |
// Code roots should never be attached to a humongous region |
|
6797 |
assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); |
|
6798 |
return false; |
|
6799 |
} |
|
6800 |
||
6801 |
if (hr->in_collection_set()) { |
|
6802 |
// Don't mark code roots into regions in the collection set here. |
|
6803 |
// They will be marked when we scan them. |
|
6804 |
return false; |
|
6805 |
} |
|
6806 |
||
6807 |
MarkStrongCodeRootCodeBlobClosure cb_cl(_g1h->concurrent_mark(), hr, _worker_id); |
|
6808 |
hr->strong_code_roots_do(&cb_cl); |
|
6809 |
return false; |
|
6810 |
} |
|
6811 |
}; |
|
6812 |
||
6813 |
void G1CollectedHeap::mark_strong_code_roots(uint worker_id) { |
|
6814 |
MarkStrongCodeRootsHRClosure cl(this, worker_id); |
|
19341
17284e84baba
8023145: G1: G1CollectedHeap::mark_strong_code_roots() needs to handle ParallelGCThreads=0
brutisso
parents:
19339
diff
changeset
|
6815 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
17284e84baba
8023145: G1: G1CollectedHeap::mark_strong_code_roots() needs to handle ParallelGCThreads=0
brutisso
parents:
19339
diff
changeset
|
6816 |
heap_region_par_iterate_chunked(&cl, |
17284e84baba
8023145: G1: G1CollectedHeap::mark_strong_code_roots() needs to handle ParallelGCThreads=0
brutisso
parents:
19339
diff
changeset
|
6817 |
worker_id, |
17284e84baba
8023145: G1: G1CollectedHeap::mark_strong_code_roots() needs to handle ParallelGCThreads=0
brutisso
parents:
19339
diff
changeset
|
6818 |
workers()->active_workers(), |
17284e84baba
8023145: G1: G1CollectedHeap::mark_strong_code_roots() needs to handle ParallelGCThreads=0
brutisso
parents:
19339
diff
changeset
|
6819 |
HeapRegion::ParMarkRootClaimValue); |
17284e84baba
8023145: G1: G1CollectedHeap::mark_strong_code_roots() needs to handle ParallelGCThreads=0
brutisso
parents:
19339
diff
changeset
|
6820 |
} else { |
17284e84baba
8023145: G1: G1CollectedHeap::mark_strong_code_roots() needs to handle ParallelGCThreads=0
brutisso
parents:
19339
diff
changeset
|
6821 |
heap_region_iterate(&cl); |
17284e84baba
8023145: G1: G1CollectedHeap::mark_strong_code_roots() needs to handle ParallelGCThreads=0
brutisso
parents:
19339
diff
changeset
|
6822 |
} |
19339 | 6823 |
} |
6824 |
||
6825 |
class RebuildStrongCodeRootClosure: public CodeBlobClosure { |
|
6826 |
G1CollectedHeap* _g1h; |
|
6827 |
||
6828 |
public: |
|
6829 |
RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : |
|
6830 |
_g1h(g1h) {} |
|
6831 |
||
6832 |
void do_code_blob(CodeBlob* cb) { |
|
6833 |
nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; |
|
6834 |
if (nm == NULL) { |
|
6835 |
return; |
|
6836 |
} |
|
6837 |
||
6838 |
if (ScavengeRootsInCode && nm->detect_scavenge_root_oops()) { |
|
6839 |
_g1h->register_nmethod(nm); |
|
6840 |
} |
|
6841 |
} |
|
6842 |
}; |
|
6843 |
||
6844 |
void G1CollectedHeap::rebuild_strong_code_roots() { |
|
6845 |
RebuildStrongCodeRootClosure blob_cl(this); |
|
6846 |
CodeCache::blobs_do(&blob_cl); |
|
6847 |
} |