author | zgu |
Thu, 28 Jun 2012 17:03:16 -0400 | |
changeset 13195 | be27e1b6a4b9 |
parent 12508 | d76458352d62 |
child 13289 | 0f61d0bac1ca |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2001, 2012, 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 "classfile/symbolTable.hpp" |
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#include "gc_implementation/g1/concurrentMark.inline.hpp" |
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#include "gc_implementation/g1/concurrentMarkThread.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/g1Log.hpp" |
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#include "gc_implementation/g1/g1OopClosures.inline.hpp" |
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#include "gc_implementation/g1/g1RemSet.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/shared/vmGCOperations.hpp" |
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#include "memory/genOopClosures.inline.hpp" |
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#include "memory/referencePolicy.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "runtime/handles.inline.hpp" |
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#include "runtime/java.hpp" |
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#include "services/memTracker.hpp" |
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// Concurrent marking bit map wrapper |
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CMBitMapRO::CMBitMapRO(ReservedSpace rs, int shifter) : |
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_bm((uintptr_t*)NULL,0), |
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_shifter(shifter) { |
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_bmStartWord = (HeapWord*)(rs.base()); |
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_bmWordSize = rs.size()/HeapWordSize; // rs.size() is in bytes |
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ReservedSpace brs(ReservedSpace::allocation_align_size_up( |
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(_bmWordSize >> (_shifter + LogBitsPerByte)) + 1)); |
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MemTracker::record_virtual_memory_type((address)brs.base(), mtGC); |
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guarantee(brs.is_reserved(), "couldn't allocate concurrent marking bit map"); |
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// For now we'll just commit all of the bit map up fromt. |
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// Later on we'll try to be more parsimonious with swap. |
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guarantee(_virtual_space.initialize(brs, brs.size()), |
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"couldn't reseve backing store for concurrent marking bit map"); |
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assert(_virtual_space.committed_size() == brs.size(), |
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"didn't reserve backing store for all of concurrent marking bit map?"); |
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_bm.set_map((uintptr_t*)_virtual_space.low()); |
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assert(_virtual_space.committed_size() << (_shifter + LogBitsPerByte) >= |
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_bmWordSize, "inconsistency in bit map sizing"); |
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_bm.set_size(_bmWordSize >> _shifter); |
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} |
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HeapWord* CMBitMapRO::getNextMarkedWordAddress(HeapWord* addr, |
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HeapWord* limit) const { |
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// First we must round addr *up* to a possible object boundary. |
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addr = (HeapWord*)align_size_up((intptr_t)addr, |
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HeapWordSize << _shifter); |
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size_t addrOffset = heapWordToOffset(addr); |
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if (limit == NULL) { |
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limit = _bmStartWord + _bmWordSize; |
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} |
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size_t limitOffset = heapWordToOffset(limit); |
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size_t nextOffset = _bm.get_next_one_offset(addrOffset, limitOffset); |
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HeapWord* nextAddr = offsetToHeapWord(nextOffset); |
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assert(nextAddr >= addr, "get_next_one postcondition"); |
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assert(nextAddr == limit || isMarked(nextAddr), |
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"get_next_one postcondition"); |
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return nextAddr; |
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} |
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HeapWord* CMBitMapRO::getNextUnmarkedWordAddress(HeapWord* addr, |
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HeapWord* limit) const { |
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size_t addrOffset = heapWordToOffset(addr); |
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if (limit == NULL) { |
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limit = _bmStartWord + _bmWordSize; |
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} |
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size_t limitOffset = heapWordToOffset(limit); |
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size_t nextOffset = _bm.get_next_zero_offset(addrOffset, limitOffset); |
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HeapWord* nextAddr = offsetToHeapWord(nextOffset); |
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assert(nextAddr >= addr, "get_next_one postcondition"); |
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assert(nextAddr == limit || !isMarked(nextAddr), |
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"get_next_one postcondition"); |
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return nextAddr; |
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} |
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int CMBitMapRO::heapWordDiffToOffsetDiff(size_t diff) const { |
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assert((diff & ((1 << _shifter) - 1)) == 0, "argument check"); |
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return (int) (diff >> _shifter); |
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} |
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#ifndef PRODUCT |
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bool CMBitMapRO::covers(ReservedSpace rs) const { |
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// assert(_bm.map() == _virtual_space.low(), "map inconsistency"); |
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assert(((size_t)_bm.size() * (size_t)(1 << _shifter)) == _bmWordSize, |
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"size inconsistency"); |
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return _bmStartWord == (HeapWord*)(rs.base()) && |
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_bmWordSize == rs.size()>>LogHeapWordSize; |
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} |
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#endif |
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void CMBitMap::clearAll() { |
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_bm.clear(); |
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return; |
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} |
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void CMBitMap::markRange(MemRegion mr) { |
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mr.intersection(MemRegion(_bmStartWord, _bmWordSize)); |
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assert(!mr.is_empty(), "unexpected empty region"); |
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assert((offsetToHeapWord(heapWordToOffset(mr.end())) == |
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((HeapWord *) mr.end())), |
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"markRange memory region end is not card aligned"); |
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// convert address range into offset range |
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_bm.at_put_range(heapWordToOffset(mr.start()), |
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heapWordToOffset(mr.end()), true); |
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} |
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void CMBitMap::clearRange(MemRegion mr) { |
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mr.intersection(MemRegion(_bmStartWord, _bmWordSize)); |
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assert(!mr.is_empty(), "unexpected empty region"); |
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// convert address range into offset range |
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_bm.at_put_range(heapWordToOffset(mr.start()), |
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heapWordToOffset(mr.end()), false); |
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} |
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MemRegion CMBitMap::getAndClearMarkedRegion(HeapWord* addr, |
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HeapWord* end_addr) { |
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HeapWord* start = getNextMarkedWordAddress(addr); |
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start = MIN2(start, end_addr); |
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HeapWord* end = getNextUnmarkedWordAddress(start); |
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end = MIN2(end, end_addr); |
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assert(start <= end, "Consistency check"); |
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MemRegion mr(start, end); |
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if (!mr.is_empty()) { |
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clearRange(mr); |
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} |
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return mr; |
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} |
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CMMarkStack::CMMarkStack(ConcurrentMark* cm) : |
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_base(NULL), _cm(cm) |
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#ifdef ASSERT |
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, _drain_in_progress(false) |
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, _drain_in_progress_yields(false) |
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#endif |
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{} |
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void CMMarkStack::allocate(size_t size) { |
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_base = NEW_C_HEAP_ARRAY(oop, size, mtGC); |
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if (_base == NULL) { |
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vm_exit_during_initialization("Failed to allocate CM region mark stack"); |
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} |
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_index = 0; |
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_capacity = (jint) size; |
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_saved_index = -1; |
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NOT_PRODUCT(_max_depth = 0); |
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} |
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CMMarkStack::~CMMarkStack() { |
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if (_base != NULL) { |
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FREE_C_HEAP_ARRAY(oop, _base, mtGC); |
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} |
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} |
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void CMMarkStack::par_push(oop ptr) { |
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while (true) { |
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if (isFull()) { |
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_overflow = true; |
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return; |
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} |
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// Otherwise... |
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jint index = _index; |
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jint next_index = index+1; |
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jint res = Atomic::cmpxchg(next_index, &_index, index); |
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if (res == index) { |
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_base[index] = ptr; |
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// Note that we don't maintain this atomically. We could, but it |
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// doesn't seem necessary. |
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NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index)); |
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return; |
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} |
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// Otherwise, we need to try again. |
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} |
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} |
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void CMMarkStack::par_adjoin_arr(oop* ptr_arr, int n) { |
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while (true) { |
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if (isFull()) { |
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_overflow = true; |
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return; |
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} |
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// Otherwise... |
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jint index = _index; |
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jint next_index = index + n; |
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if (next_index > _capacity) { |
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_overflow = true; |
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return; |
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} |
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jint res = Atomic::cmpxchg(next_index, &_index, index); |
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if (res == index) { |
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for (int i = 0; i < n; i++) { |
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int ind = index + i; |
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assert(ind < _capacity, "By overflow test above."); |
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_base[ind] = ptr_arr[i]; |
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} |
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NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index)); |
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return; |
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} |
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// Otherwise, we need to try again. |
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} |
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} |
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void CMMarkStack::par_push_arr(oop* ptr_arr, int n) { |
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MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); |
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jint start = _index; |
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jint next_index = start + n; |
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if (next_index > _capacity) { |
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_overflow = true; |
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return; |
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} |
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// Otherwise. |
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_index = next_index; |
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for (int i = 0; i < n; i++) { |
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int ind = start + i; |
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assert(ind < _capacity, "By overflow test above."); |
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_base[ind] = ptr_arr[i]; |
246 |
} |
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} |
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bool CMMarkStack::par_pop_arr(oop* ptr_arr, int max, int* n) { |
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MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); |
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jint index = _index; |
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if (index == 0) { |
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*n = 0; |
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return false; |
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} else { |
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int k = MIN2(max, index); |
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jint new_ind = index - k; |
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for (int j = 0; j < k; j++) { |
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ptr_arr[j] = _base[new_ind + j]; |
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} |
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_index = new_ind; |
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*n = k; |
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return true; |
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} |
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} |
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template<class OopClosureClass> |
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bool CMMarkStack::drain(OopClosureClass* cl, CMBitMap* bm, bool yield_after) { |
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assert(!_drain_in_progress || !_drain_in_progress_yields || yield_after |
|
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|| SafepointSynchronize::is_at_safepoint(), |
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"Drain recursion must be yield-safe."); |
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bool res = true; |
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debug_only(_drain_in_progress = true); |
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275 |
debug_only(_drain_in_progress_yields = yield_after); |
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while (!isEmpty()) { |
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oop newOop = pop(); |
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assert(G1CollectedHeap::heap()->is_in_reserved(newOop), "Bad pop"); |
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assert(newOop->is_oop(), "Expected an oop"); |
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assert(bm == NULL || bm->isMarked((HeapWord*)newOop), |
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"only grey objects on this stack"); |
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newOop->oop_iterate(cl); |
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if (yield_after && _cm->do_yield_check()) { |
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res = false; |
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break; |
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} |
287 |
} |
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debug_only(_drain_in_progress = false); |
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return res; |
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} |
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void CMMarkStack::note_start_of_gc() { |
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assert(_saved_index == -1, |
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"note_start_of_gc()/end_of_gc() bracketed incorrectly"); |
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_saved_index = _index; |
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} |
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void CMMarkStack::note_end_of_gc() { |
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// This is intentionally a guarantee, instead of an assert. If we |
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// accidentally add something to the mark stack during GC, it |
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// will be a correctness issue so it's better if we crash. we'll |
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// only check this once per GC anyway, so it won't be a performance |
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// issue in any way. |
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guarantee(_saved_index == _index, |
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|
305 |
err_msg("saved index: %d index: %d", _saved_index, _index)); |
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306 |
_saved_index = -1; |
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|
307 |
} |
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|
308 |
|
1374 | 309 |
void CMMarkStack::oops_do(OopClosure* f) { |
11455
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|
310 |
assert(_saved_index == _index, |
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|
311 |
err_msg("saved index: %d index: %d", _saved_index, _index)); |
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|
312 |
for (int i = 0; i < _index; i += 1) { |
1374 | 313 |
f->do_oop(&_base[i]); |
314 |
} |
|
315 |
} |
|
316 |
||
317 |
bool ConcurrentMark::not_yet_marked(oop obj) const { |
|
318 |
return (_g1h->is_obj_ill(obj) |
|
319 |
|| (_g1h->is_in_permanent(obj) |
|
320 |
&& !nextMarkBitMap()->isMarked((HeapWord*)obj))); |
|
321 |
} |
|
322 |
||
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|
323 |
CMRootRegions::CMRootRegions() : |
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|
324 |
_young_list(NULL), _cm(NULL), _scan_in_progress(false), |
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|
325 |
_should_abort(false), _next_survivor(NULL) { } |
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|
326 |
|
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|
327 |
void CMRootRegions::init(G1CollectedHeap* g1h, ConcurrentMark* cm) { |
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|
328 |
_young_list = g1h->young_list(); |
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|
329 |
_cm = cm; |
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|
330 |
} |
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|
331 |
|
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|
332 |
void CMRootRegions::prepare_for_scan() { |
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|
333 |
assert(!scan_in_progress(), "pre-condition"); |
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|
334 |
|
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|
335 |
// Currently, only survivors can be root regions. |
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|
336 |
assert(_next_survivor == NULL, "pre-condition"); |
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|
337 |
_next_survivor = _young_list->first_survivor_region(); |
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|
338 |
_scan_in_progress = (_next_survivor != NULL); |
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|
339 |
_should_abort = false; |
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|
340 |
} |
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|
341 |
|
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|
342 |
HeapRegion* CMRootRegions::claim_next() { |
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|
343 |
if (_should_abort) { |
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|
344 |
// If someone has set the should_abort flag, we return NULL to |
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|
345 |
// force the caller to bail out of their loop. |
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|
346 |
return NULL; |
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|
347 |
} |
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|
348 |
|
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|
349 |
// Currently, only survivors can be root regions. |
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|
350 |
HeapRegion* res = _next_survivor; |
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|
351 |
if (res != NULL) { |
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|
352 |
MutexLockerEx x(RootRegionScan_lock, Mutex::_no_safepoint_check_flag); |
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|
353 |
// Read it again in case it changed while we were waiting for the lock. |
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|
354 |
res = _next_survivor; |
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|
355 |
if (res != NULL) { |
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|
356 |
if (res == _young_list->last_survivor_region()) { |
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|
357 |
// We just claimed the last survivor so store NULL to indicate |
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|
358 |
// that we're done. |
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|
359 |
_next_survivor = NULL; |
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|
360 |
} else { |
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|
361 |
_next_survivor = res->get_next_young_region(); |
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|
362 |
} |
e1df4d08a1f4
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changeset
|
363 |
} else { |
e1df4d08a1f4
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changeset
|
364 |
// Someone else claimed the last survivor while we were trying |
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|
365 |
// to take the lock so nothing else to do. |
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|
366 |
} |
e1df4d08a1f4
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|
367 |
} |
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|
368 |
assert(res == NULL || res->is_survivor(), "post-condition"); |
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changeset
|
369 |
|
e1df4d08a1f4
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changeset
|
370 |
return res; |
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changeset
|
371 |
} |
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changeset
|
372 |
|
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changeset
|
373 |
void CMRootRegions::scan_finished() { |
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|
374 |
assert(scan_in_progress(), "pre-condition"); |
e1df4d08a1f4
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changeset
|
375 |
|
e1df4d08a1f4
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changeset
|
376 |
// Currently, only survivors can be root regions. |
e1df4d08a1f4
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|
377 |
if (!_should_abort) { |
e1df4d08a1f4
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changeset
|
378 |
assert(_next_survivor == NULL, "we should have claimed all survivors"); |
e1df4d08a1f4
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|
379 |
} |
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changeset
|
380 |
_next_survivor = NULL; |
e1df4d08a1f4
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changeset
|
381 |
|
e1df4d08a1f4
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diff
changeset
|
382 |
{ |
e1df4d08a1f4
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changeset
|
383 |
MutexLockerEx x(RootRegionScan_lock, Mutex::_no_safepoint_check_flag); |
e1df4d08a1f4
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changeset
|
384 |
_scan_in_progress = false; |
e1df4d08a1f4
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changeset
|
385 |
RootRegionScan_lock->notify_all(); |
e1df4d08a1f4
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changeset
|
386 |
} |
e1df4d08a1f4
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tonyp
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diff
changeset
|
387 |
} |
e1df4d08a1f4
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diff
changeset
|
388 |
|
e1df4d08a1f4
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changeset
|
389 |
bool CMRootRegions::wait_until_scan_finished() { |
e1df4d08a1f4
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changeset
|
390 |
if (!scan_in_progress()) return false; |
e1df4d08a1f4
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changeset
|
391 |
|
e1df4d08a1f4
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diff
changeset
|
392 |
{ |
e1df4d08a1f4
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changeset
|
393 |
MutexLockerEx x(RootRegionScan_lock, Mutex::_no_safepoint_check_flag); |
e1df4d08a1f4
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changeset
|
394 |
while (scan_in_progress()) { |
e1df4d08a1f4
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changeset
|
395 |
RootRegionScan_lock->wait(Mutex::_no_safepoint_check_flag); |
e1df4d08a1f4
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changeset
|
396 |
} |
e1df4d08a1f4
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changeset
|
397 |
} |
e1df4d08a1f4
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diff
changeset
|
398 |
return true; |
e1df4d08a1f4
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diff
changeset
|
399 |
} |
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changeset
|
400 |
|
1374 | 401 |
#ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away |
402 |
#pragma warning( disable:4355 ) // 'this' : used in base member initializer list |
|
403 |
#endif // _MSC_VER |
|
404 |
||
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
405 |
uint ConcurrentMark::scale_parallel_threads(uint n_par_threads) { |
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
406 |
return MAX2((n_par_threads + 2) / 4, 1U); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
407 |
} |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
408 |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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diff
changeset
|
409 |
ConcurrentMark::ConcurrentMark(ReservedSpace rs, uint max_regions) : |
1374 | 410 |
_markBitMap1(rs, MinObjAlignment - 1), |
411 |
_markBitMap2(rs, MinObjAlignment - 1), |
|
412 |
||
413 |
_parallel_marking_threads(0), |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
414 |
_max_parallel_marking_threads(0), |
1374 | 415 |
_sleep_factor(0.0), |
416 |
_marking_task_overhead(1.0), |
|
417 |
_cleanup_sleep_factor(0.0), |
|
418 |
_cleanup_task_overhead(1.0), |
|
7923 | 419 |
_cleanup_list("Cleanup List"), |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
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diff
changeset
|
420 |
_region_bm((BitMap::idx_t) max_regions, false /* in_resource_area*/), |
1374 | 421 |
_card_bm((rs.size() + CardTableModRefBS::card_size - 1) >> |
422 |
CardTableModRefBS::card_shift, |
|
423 |
false /* in_resource_area*/), |
|
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
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11577
diff
changeset
|
424 |
|
1374 | 425 |
_prevMarkBitMap(&_markBitMap1), |
426 |
_nextMarkBitMap(&_markBitMap2), |
|
427 |
||
428 |
_markStack(this), |
|
429 |
// _finger set in set_non_marking_state |
|
430 |
||
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
431 |
_max_task_num(MAX2((uint)ParallelGCThreads, 1U)), |
1374 | 432 |
// _active_tasks set in set_non_marking_state |
433 |
// _tasks set inside the constructor |
|
434 |
_task_queues(new CMTaskQueueSet((int) _max_task_num)), |
|
435 |
_terminator(ParallelTaskTerminator((int) _max_task_num, _task_queues)), |
|
436 |
||
437 |
_has_overflown(false), |
|
438 |
_concurrent(false), |
|
2145
da1dfec15623
6814467: G1: small fixes related to concurrent marking verboseness
tonyp
parents:
1623
diff
changeset
|
439 |
_has_aborted(false), |
da1dfec15623
6814467: G1: small fixes related to concurrent marking verboseness
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1623
diff
changeset
|
440 |
_restart_for_overflow(false), |
da1dfec15623
6814467: G1: small fixes related to concurrent marking verboseness
tonyp
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1623
diff
changeset
|
441 |
_concurrent_marking_in_progress(false), |
1374 | 442 |
|
443 |
// _verbose_level set below |
|
444 |
||
445 |
_init_times(), |
|
446 |
_remark_times(), _remark_mark_times(), _remark_weak_ref_times(), |
|
447 |
_cleanup_times(), |
|
448 |
_total_counting_time(0.0), |
|
449 |
_total_rs_scrub_time(0.0), |
|
11583
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changeset
|
450 |
|
83a7383de44c
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parents:
11577
diff
changeset
|
451 |
_parallel_workers(NULL), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
452 |
|
83a7383de44c
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johnc
parents:
11577
diff
changeset
|
453 |
_count_card_bitmaps(NULL), |
83a7383de44c
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johnc
parents:
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diff
changeset
|
454 |
_count_marked_bytes(NULL) { |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
455 |
CMVerboseLevel verbose_level = (CMVerboseLevel) G1MarkingVerboseLevel; |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
456 |
if (verbose_level < no_verbose) { |
1374 | 457 |
verbose_level = no_verbose; |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
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parents:
9995
diff
changeset
|
458 |
} |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
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changeset
|
459 |
if (verbose_level > high_verbose) { |
1374 | 460 |
verbose_level = high_verbose; |
9999
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changeset
|
461 |
} |
1374 | 462 |
_verbose_level = verbose_level; |
463 |
||
9999
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|
464 |
if (verbose_low()) { |
1374 | 465 |
gclog_or_tty->print_cr("[global] init, heap start = "PTR_FORMAT", " |
466 |
"heap end = "PTR_FORMAT, _heap_start, _heap_end); |
|
9999
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changeset
|
467 |
} |
1374 | 468 |
|
5035 | 469 |
_markStack.allocate(MarkStackSize); |
1374 | 470 |
|
471 |
// Create & start a ConcurrentMark thread. |
|
3262
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changeset
|
472 |
_cmThread = new ConcurrentMarkThread(this); |
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|
473 |
assert(cmThread() != NULL, "CM Thread should have been created"); |
30d1c247fc25
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|
474 |
assert(cmThread()->cm() != NULL, "CM Thread should refer to this cm"); |
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6700789: G1: Enable use of compressed oops with G1 heaps
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changeset
|
475 |
|
1374 | 476 |
_g1h = G1CollectedHeap::heap(); |
477 |
assert(CGC_lock != NULL, "Where's the CGC_lock?"); |
|
478 |
assert(_markBitMap1.covers(rs), "_markBitMap1 inconsistency"); |
|
479 |
assert(_markBitMap2.covers(rs), "_markBitMap2 inconsistency"); |
|
480 |
||
481 |
SATBMarkQueueSet& satb_qs = JavaThread::satb_mark_queue_set(); |
|
5033 | 482 |
satb_qs.set_buffer_size(G1SATBBufferSize); |
1374 | 483 |
|
11584
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7127706: G1: re-enable survivors during the initial-mark pause
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11583
diff
changeset
|
484 |
_root_regions.init(_g1h, this); |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
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diff
changeset
|
485 |
|
13195 | 486 |
_tasks = NEW_C_HEAP_ARRAY(CMTask*, _max_task_num, mtGC); |
487 |
_accum_task_vtime = NEW_C_HEAP_ARRAY(double, _max_task_num, mtGC); |
|
488 |
||
489 |
_count_card_bitmaps = NEW_C_HEAP_ARRAY(BitMap, _max_task_num, mtGC); |
|
490 |
_count_marked_bytes = NEW_C_HEAP_ARRAY(size_t*, _max_task_num, mtGC); |
|
11583
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6484965: G1: piggy-back liveness accounting phase on marking
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diff
changeset
|
491 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
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diff
changeset
|
492 |
BitMap::idx_t card_bm_size = _card_bm.size(); |
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johnc
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diff
changeset
|
493 |
|
1374 | 494 |
// so that the assertion in MarkingTaskQueue::task_queue doesn't fail |
495 |
_active_tasks = _max_task_num; |
|
496 |
for (int i = 0; i < (int) _max_task_num; ++i) { |
|
497 |
CMTaskQueue* task_queue = new CMTaskQueue(); |
|
498 |
task_queue->initialize(); |
|
499 |
_task_queues->register_queue(i, task_queue); |
|
500 |
||
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
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diff
changeset
|
501 |
_count_card_bitmaps[i] = BitMap(card_bm_size, false); |
13195 | 502 |
_count_marked_bytes[i] = NEW_C_HEAP_ARRAY(size_t, (size_t) max_regions, mtGC); |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
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parents:
11577
diff
changeset
|
503 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
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11577
diff
changeset
|
504 |
_tasks[i] = new CMTask(i, this, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
505 |
_count_marked_bytes[i], |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
506 |
&_count_card_bitmaps[i], |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
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diff
changeset
|
507 |
task_queue, _task_queues); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
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diff
changeset
|
508 |
|
1374 | 509 |
_accum_task_vtime[i] = 0.0; |
510 |
} |
|
511 |
||
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
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diff
changeset
|
512 |
// Calculate the card number for the bottom of the heap. Used |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
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diff
changeset
|
513 |
// in biasing indexes into the accounting card bitmaps. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
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diff
changeset
|
514 |
_heap_bottom_card_num = |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
515 |
intptr_t(uintptr_t(_g1h->reserved_region().start()) >> |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
516 |
CardTableModRefBS::card_shift); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
517 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
518 |
// Clear all the liveness counting data |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
519 |
clear_all_count_data(); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
520 |
|
5035 | 521 |
if (ConcGCThreads > ParallelGCThreads) { |
522 |
vm_exit_during_initialization("Can't have more ConcGCThreads " |
|
1374 | 523 |
"than ParallelGCThreads."); |
524 |
} |
|
525 |
if (ParallelGCThreads == 0) { |
|
526 |
// if we are not running with any parallel GC threads we will not |
|
527 |
// spawn any marking threads either |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
528 |
_parallel_marking_threads = 0; |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
529 |
_max_parallel_marking_threads = 0; |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
530 |
_sleep_factor = 0.0; |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
531 |
_marking_task_overhead = 1.0; |
1374 | 532 |
} else { |
5035 | 533 |
if (ConcGCThreads > 0) { |
534 |
// notice that ConcGCThreads overwrites G1MarkingOverheadPercent |
|
1374 | 535 |
// if both are set |
536 |
||
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
537 |
_parallel_marking_threads = (uint) ConcGCThreads; |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
538 |
_max_parallel_marking_threads = _parallel_marking_threads; |
1374 | 539 |
_sleep_factor = 0.0; |
540 |
_marking_task_overhead = 1.0; |
|
2741 | 541 |
} else if (G1MarkingOverheadPercent > 0) { |
1374 | 542 |
// we will calculate the number of parallel marking threads |
543 |
// based on a target overhead with respect to the soft real-time |
|
544 |
// goal |
|
545 |
||
2741 | 546 |
double marking_overhead = (double) G1MarkingOverheadPercent / 100.0; |
1374 | 547 |
double overall_cm_overhead = |
2741 | 548 |
(double) MaxGCPauseMillis * marking_overhead / |
549 |
(double) GCPauseIntervalMillis; |
|
1374 | 550 |
double cpu_ratio = 1.0 / (double) os::processor_count(); |
551 |
double marking_thread_num = ceil(overall_cm_overhead / cpu_ratio); |
|
552 |
double marking_task_overhead = |
|
553 |
overall_cm_overhead / marking_thread_num * |
|
554 |
(double) os::processor_count(); |
|
555 |
double sleep_factor = |
|
556 |
(1.0 - marking_task_overhead) / marking_task_overhead; |
|
557 |
||
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
558 |
_parallel_marking_threads = (uint) marking_thread_num; |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
559 |
_max_parallel_marking_threads = _parallel_marking_threads; |
1374 | 560 |
_sleep_factor = sleep_factor; |
561 |
_marking_task_overhead = marking_task_overhead; |
|
562 |
} else { |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
563 |
_parallel_marking_threads = scale_parallel_threads((uint)ParallelGCThreads); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
564 |
_max_parallel_marking_threads = _parallel_marking_threads; |
1374 | 565 |
_sleep_factor = 0.0; |
566 |
_marking_task_overhead = 1.0; |
|
567 |
} |
|
568 |
||
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
569 |
if (parallel_marking_threads() > 1) { |
1374 | 570 |
_cleanup_task_overhead = 1.0; |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
571 |
} else { |
1374 | 572 |
_cleanup_task_overhead = marking_task_overhead(); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
573 |
} |
1374 | 574 |
_cleanup_sleep_factor = |
575 |
(1.0 - cleanup_task_overhead()) / cleanup_task_overhead(); |
|
576 |
||
577 |
#if 0 |
|
578 |
gclog_or_tty->print_cr("Marking Threads %d", parallel_marking_threads()); |
|
579 |
gclog_or_tty->print_cr("CM Marking Task Overhead %1.4lf", marking_task_overhead()); |
|
580 |
gclog_or_tty->print_cr("CM Sleep Factor %1.4lf", sleep_factor()); |
|
581 |
gclog_or_tty->print_cr("CL Marking Task Overhead %1.4lf", cleanup_task_overhead()); |
|
582 |
gclog_or_tty->print_cr("CL Sleep Factor %1.4lf", cleanup_sleep_factor()); |
|
583 |
#endif |
|
584 |
||
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
585 |
guarantee(parallel_marking_threads() > 0, "peace of mind"); |
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
6261
diff
changeset
|
586 |
_parallel_workers = new FlexibleWorkGang("G1 Parallel Marking Threads", |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
587 |
_max_parallel_marking_threads, false, true); |
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
6261
diff
changeset
|
588 |
if (_parallel_workers == NULL) { |
1374 | 589 |
vm_exit_during_initialization("Failed necessary allocation."); |
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
6261
diff
changeset
|
590 |
} else { |
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
6261
diff
changeset
|
591 |
_parallel_workers->initialize_workers(); |
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
6261
diff
changeset
|
592 |
} |
1374 | 593 |
} |
594 |
||
595 |
// so that the call below can read a sensible value |
|
596 |
_heap_start = (HeapWord*) rs.base(); |
|
597 |
set_non_marking_state(); |
|
598 |
} |
|
599 |
||
600 |
void ConcurrentMark::update_g1_committed(bool force) { |
|
601 |
// If concurrent marking is not in progress, then we do not need to |
|
12272
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
602 |
// update _heap_end. |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
603 |
if (!concurrent_marking_in_progress() && !force) return; |
1374 | 604 |
|
605 |
MemRegion committed = _g1h->g1_committed(); |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
606 |
assert(committed.start() == _heap_start, "start shouldn't change"); |
1374 | 607 |
HeapWord* new_end = committed.end(); |
608 |
if (new_end > _heap_end) { |
|
609 |
// The heap has been expanded. |
|
610 |
||
611 |
_heap_end = new_end; |
|
612 |
} |
|
613 |
// Notice that the heap can also shrink. However, this only happens |
|
614 |
// during a Full GC (at least currently) and the entire marking |
|
615 |
// phase will bail out and the task will not be restarted. So, let's |
|
616 |
// do nothing. |
|
617 |
} |
|
618 |
||
619 |
void ConcurrentMark::reset() { |
|
620 |
// Starting values for these two. This should be called in a STW |
|
621 |
// phase. CM will be notified of any future g1_committed expansions |
|
622 |
// will be at the end of evacuation pauses, when tasks are |
|
623 |
// inactive. |
|
624 |
MemRegion committed = _g1h->g1_committed(); |
|
625 |
_heap_start = committed.start(); |
|
626 |
_heap_end = committed.end(); |
|
627 |
||
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
628 |
// Separated the asserts so that we know which one fires. |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
629 |
assert(_heap_start != NULL, "heap bounds should look ok"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
630 |
assert(_heap_end != NULL, "heap bounds should look ok"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
631 |
assert(_heap_start < _heap_end, "heap bounds should look ok"); |
1374 | 632 |
|
633 |
// reset all the marking data structures and any necessary flags |
|
634 |
clear_marking_state(); |
|
635 |
||
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
636 |
if (verbose_low()) { |
1374 | 637 |
gclog_or_tty->print_cr("[global] resetting"); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
638 |
} |
1374 | 639 |
|
640 |
// We do reset all of them, since different phases will use |
|
641 |
// different number of active threads. So, it's easiest to have all |
|
642 |
// of them ready. |
|
6761
f9191297ce83
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
6759
diff
changeset
|
643 |
for (int i = 0; i < (int) _max_task_num; ++i) { |
1374 | 644 |
_tasks[i]->reset(_nextMarkBitMap); |
6761
f9191297ce83
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
6759
diff
changeset
|
645 |
} |
1374 | 646 |
|
647 |
// we need this to make sure that the flag is on during the evac |
|
648 |
// pause with initial mark piggy-backed |
|
649 |
set_concurrent_marking_in_progress(); |
|
650 |
} |
|
651 |
||
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
652 |
void ConcurrentMark::set_phase(uint active_tasks, bool concurrent) { |
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
653 |
assert(active_tasks <= _max_task_num, "we should not have more"); |
1374 | 654 |
|
655 |
_active_tasks = active_tasks; |
|
656 |
// Need to update the three data structures below according to the |
|
657 |
// number of active threads for this phase. |
|
658 |
_terminator = ParallelTaskTerminator((int) active_tasks, _task_queues); |
|
659 |
_first_overflow_barrier_sync.set_n_workers((int) active_tasks); |
|
660 |
_second_overflow_barrier_sync.set_n_workers((int) active_tasks); |
|
661 |
||
662 |
_concurrent = concurrent; |
|
663 |
// We propagate this to all tasks, not just the active ones. |
|
664 |
for (int i = 0; i < (int) _max_task_num; ++i) |
|
665 |
_tasks[i]->set_concurrent(concurrent); |
|
666 |
||
667 |
if (concurrent) { |
|
668 |
set_concurrent_marking_in_progress(); |
|
669 |
} else { |
|
670 |
// We currently assume that the concurrent flag has been set to |
|
671 |
// false before we start remark. At this point we should also be |
|
672 |
// in a STW phase. |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
673 |
assert(!concurrent_marking_in_progress(), "invariant"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
674 |
assert(_finger == _heap_end, "only way to get here"); |
1374 | 675 |
update_g1_committed(true); |
676 |
} |
|
677 |
} |
|
678 |
||
679 |
void ConcurrentMark::set_non_marking_state() { |
|
680 |
// We set the global marking state to some default values when we're |
|
681 |
// not doing marking. |
|
682 |
clear_marking_state(); |
|
683 |
_active_tasks = 0; |
|
684 |
clear_concurrent_marking_in_progress(); |
|
685 |
} |
|
686 |
||
687 |
ConcurrentMark::~ConcurrentMark() { |
|
11403 | 688 |
// The ConcurrentMark instance is never freed. |
689 |
ShouldNotReachHere(); |
|
1374 | 690 |
} |
691 |
||
692 |
void ConcurrentMark::clearNextBitmap() { |
|
5243
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
693 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
694 |
G1CollectorPolicy* g1p = g1h->g1_policy(); |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
695 |
|
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
696 |
// Make sure that the concurrent mark thread looks to still be in |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
697 |
// the current cycle. |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
698 |
guarantee(cmThread()->during_cycle(), "invariant"); |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
699 |
|
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
700 |
// We are finishing up the current cycle by clearing the next |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
701 |
// marking bitmap and getting it ready for the next cycle. During |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
702 |
// this time no other cycle can start. So, let's make sure that this |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
703 |
// is the case. |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
704 |
guarantee(!g1h->mark_in_progress(), "invariant"); |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
705 |
|
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
706 |
// clear the mark bitmap (no grey objects to start with). |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
707 |
// We need to do this in chunks and offer to yield in between |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
708 |
// each chunk. |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
709 |
HeapWord* start = _nextMarkBitMap->startWord(); |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
710 |
HeapWord* end = _nextMarkBitMap->endWord(); |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
711 |
HeapWord* cur = start; |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
712 |
size_t chunkSize = M; |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
713 |
while (cur < end) { |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
714 |
HeapWord* next = cur + chunkSize; |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
715 |
if (next > end) { |
5243
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
716 |
next = end; |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
717 |
} |
5243
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
718 |
MemRegion mr(cur,next); |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
719 |
_nextMarkBitMap->clearRange(mr); |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
720 |
cur = next; |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
721 |
do_yield_check(); |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
722 |
|
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
723 |
// Repeat the asserts from above. We'll do them as asserts here to |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
724 |
// minimize their overhead on the product. However, we'll have |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
725 |
// them as guarantees at the beginning / end of the bitmap |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
726 |
// clearing to get some checking in the product. |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
727 |
assert(cmThread()->during_cycle(), "invariant"); |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
728 |
assert(!g1h->mark_in_progress(), "invariant"); |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
729 |
} |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
730 |
|
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
731 |
// Clear the liveness counting data |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
732 |
clear_all_count_data(); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
733 |
|
5243
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
734 |
// Repeat the asserts from above. |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
735 |
guarantee(cmThread()->during_cycle(), "invariant"); |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5242
diff
changeset
|
736 |
guarantee(!g1h->mark_in_progress(), "invariant"); |
1374 | 737 |
} |
738 |
||
739 |
class NoteStartOfMarkHRClosure: public HeapRegionClosure { |
|
740 |
public: |
|
741 |
bool doHeapRegion(HeapRegion* r) { |
|
742 |
if (!r->continuesHumongous()) { |
|
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
743 |
r->note_start_of_marking(); |
1374 | 744 |
} |
745 |
return false; |
|
746 |
} |
|
747 |
}; |
|
748 |
||
749 |
void ConcurrentMark::checkpointRootsInitialPre() { |
|
750 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
751 |
G1CollectorPolicy* g1p = g1h->g1_policy(); |
|
752 |
||
753 |
_has_aborted = false; |
|
754 |
||
5542
be05c5ffe905
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
5344
diff
changeset
|
755 |
#ifndef PRODUCT |
4099 | 756 |
if (G1PrintReachableAtInitialMark) { |
5344 | 757 |
print_reachable("at-cycle-start", |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
758 |
VerifyOption_G1UsePrevMarking, true /* all */); |
4099 | 759 |
} |
5542
be05c5ffe905
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
5344
diff
changeset
|
760 |
#endif |
1374 | 761 |
|
762 |
// Initialise marking structures. This has to be done in a STW phase. |
|
763 |
reset(); |
|
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
764 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
765 |
// For each region note start of marking. |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
766 |
NoteStartOfMarkHRClosure startcl; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
767 |
g1h->heap_region_iterate(&startcl); |
1374 | 768 |
} |
769 |
||
770 |
||
771 |
void ConcurrentMark::checkpointRootsInitialPost() { |
|
772 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
773 |
||
9417
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
774 |
// If we force an overflow during remark, the remark operation will |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
775 |
// actually abort and we'll restart concurrent marking. If we always |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
776 |
// force an oveflow during remark we'll never actually complete the |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
777 |
// marking phase. So, we initilize this here, at the start of the |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
778 |
// cycle, so that at the remaining overflow number will decrease at |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
779 |
// every remark and we'll eventually not need to cause one. |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
780 |
force_overflow_stw()->init(); |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
781 |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10668
diff
changeset
|
782 |
// Start Concurrent Marking weak-reference discovery. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10668
diff
changeset
|
783 |
ReferenceProcessor* rp = g1h->ref_processor_cm(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10668
diff
changeset
|
784 |
// enable ("weak") refs discovery |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10668
diff
changeset
|
785 |
rp->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
1610
5dddd195cc86
6778647: snap(), snap_policy() should be renamed setup(), setup_policy()
ysr
parents:
1606
diff
changeset
|
786 |
rp->setup_policy(false); // snapshot the soft ref policy to be used in this cycle |
1374 | 787 |
|
788 |
SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); |
|
5082
19e725a3d2eb
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
5079
diff
changeset
|
789 |
// This is the start of the marking cycle, we're expected all |
19e725a3d2eb
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
5079
diff
changeset
|
790 |
// threads to have SATB queues with active set to false. |
19e725a3d2eb
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
5079
diff
changeset
|
791 |
satb_mq_set.set_active_all_threads(true, /* new active value */ |
19e725a3d2eb
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
5079
diff
changeset
|
792 |
false /* expected_active */); |
1374 | 793 |
|
11584
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
794 |
_root_regions.prepare_for_scan(); |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
795 |
|
1374 | 796 |
// update_g1_committed() will be called at the end of an evac pause |
797 |
// when marking is on. So, it's also called at the end of the |
|
798 |
// initial-mark pause to update the heap end, if the heap expands |
|
799 |
// during it. No need to call it here. |
|
800 |
} |
|
801 |
||
802 |
/* |
|
9417
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
803 |
* Notice that in the next two methods, we actually leave the STS |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
804 |
* during the barrier sync and join it immediately afterwards. If we |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
805 |
* do not do this, the following deadlock can occur: one thread could |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
806 |
* be in the barrier sync code, waiting for the other thread to also |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
807 |
* sync up, whereas another one could be trying to yield, while also |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
808 |
* waiting for the other threads to sync up too. |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
809 |
* |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
810 |
* Note, however, that this code is also used during remark and in |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
811 |
* this case we should not attempt to leave / enter the STS, otherwise |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
812 |
* we'll either hit an asseert (debug / fastdebug) or deadlock |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
813 |
* (product). So we should only leave / enter the STS if we are |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
814 |
* operating concurrently. |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
815 |
* |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
816 |
* Because the thread that does the sync barrier has left the STS, it |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
817 |
* is possible to be suspended for a Full GC or an evacuation pause |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
818 |
* could occur. This is actually safe, since the entering the sync |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
819 |
* barrier is one of the last things do_marking_step() does, and it |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
820 |
* doesn't manipulate any data structures afterwards. |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
821 |
*/ |
1374 | 822 |
|
823 |
void ConcurrentMark::enter_first_sync_barrier(int task_num) { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
824 |
if (verbose_low()) { |
1374 | 825 |
gclog_or_tty->print_cr("[%d] entering first barrier", task_num); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
826 |
} |
1374 | 827 |
|
9417
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
828 |
if (concurrent()) { |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
829 |
ConcurrentGCThread::stsLeave(); |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
830 |
} |
1374 | 831 |
_first_overflow_barrier_sync.enter(); |
9417
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
832 |
if (concurrent()) { |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
833 |
ConcurrentGCThread::stsJoin(); |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
834 |
} |
1374 | 835 |
// at this point everyone should have synced up and not be doing any |
836 |
// more work |
|
837 |
||
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
838 |
if (verbose_low()) { |
1374 | 839 |
gclog_or_tty->print_cr("[%d] leaving first barrier", task_num); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
840 |
} |
1374 | 841 |
|
842 |
// let task 0 do this |
|
843 |
if (task_num == 0) { |
|
844 |
// task 0 is responsible for clearing the global data structures |
|
9417
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
845 |
// We should be here because of an overflow. During STW we should |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
846 |
// not clear the overflow flag since we rely on it being true when |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
847 |
// we exit this method to abort the pause and restart concurent |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
848 |
// marking. |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
849 |
clear_marking_state(concurrent() /* clear_overflow */); |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
850 |
force_overflow()->update(); |
1374 | 851 |
|
12378
ed44b9ecfa2f
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
12272
diff
changeset
|
852 |
if (G1Log::fine()) { |
1374 | 853 |
gclog_or_tty->date_stamp(PrintGCDateStamps); |
854 |
gclog_or_tty->stamp(PrintGCTimeStamps); |
|
855 |
gclog_or_tty->print_cr("[GC concurrent-mark-reset-for-overflow]"); |
|
856 |
} |
|
857 |
} |
|
858 |
||
859 |
// after this, each task should reset its own data structures then |
|
860 |
// then go into the second barrier |
|
861 |
} |
|
862 |
||
863 |
void ConcurrentMark::enter_second_sync_barrier(int task_num) { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
864 |
if (verbose_low()) { |
1374 | 865 |
gclog_or_tty->print_cr("[%d] entering second barrier", task_num); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
866 |
} |
1374 | 867 |
|
9417
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
868 |
if (concurrent()) { |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
869 |
ConcurrentGCThread::stsLeave(); |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
870 |
} |
1374 | 871 |
_second_overflow_barrier_sync.enter(); |
9417
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
872 |
if (concurrent()) { |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
873 |
ConcurrentGCThread::stsJoin(); |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
874 |
} |
1374 | 875 |
// at this point everything should be re-initialised and ready to go |
876 |
||
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
877 |
if (verbose_low()) { |
1374 | 878 |
gclog_or_tty->print_cr("[%d] leaving second barrier", task_num); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
879 |
} |
1374 | 880 |
} |
881 |
||
9417
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
882 |
#ifndef PRODUCT |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
883 |
void ForceOverflowSettings::init() { |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
884 |
_num_remaining = G1ConcMarkForceOverflow; |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
885 |
_force = false; |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
886 |
update(); |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
887 |
} |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
888 |
|
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
889 |
void ForceOverflowSettings::update() { |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
890 |
if (_num_remaining > 0) { |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
891 |
_num_remaining -= 1; |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
892 |
_force = true; |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
893 |
} else { |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
894 |
_force = false; |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
895 |
} |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
896 |
} |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
897 |
|
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
898 |
bool ForceOverflowSettings::should_force() { |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
899 |
if (_force) { |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
900 |
_force = false; |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
901 |
return true; |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
902 |
} else { |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
903 |
return false; |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
904 |
} |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
905 |
} |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
906 |
#endif // !PRODUCT |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
907 |
|
1374 | 908 |
class CMConcurrentMarkingTask: public AbstractGangTask { |
909 |
private: |
|
910 |
ConcurrentMark* _cm; |
|
911 |
ConcurrentMarkThread* _cmt; |
|
912 |
||
913 |
public: |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
914 |
void work(uint worker_id) { |
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
915 |
assert(Thread::current()->is_ConcurrentGC_thread(), |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
916 |
"this should only be done by a conc GC thread"); |
7399
4ecd771fa2d1
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
7397
diff
changeset
|
917 |
ResourceMark rm; |
1374 | 918 |
|
919 |
double start_vtime = os::elapsedVTime(); |
|
920 |
||
921 |
ConcurrentGCThread::stsJoin(); |
|
922 |
||
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
923 |
assert(worker_id < _cm->active_tasks(), "invariant"); |
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
924 |
CMTask* the_task = _cm->task(worker_id); |
1374 | 925 |
the_task->record_start_time(); |
926 |
if (!_cm->has_aborted()) { |
|
927 |
do { |
|
928 |
double start_vtime_sec = os::elapsedVTime(); |
|
929 |
double start_time_sec = os::elapsedTime(); |
|
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
930 |
double mark_step_duration_ms = G1ConcMarkStepDurationMillis; |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
931 |
|
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
932 |
the_task->do_marking_step(mark_step_duration_ms, |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
933 |
true /* do_stealing */, |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
934 |
true /* do_termination */); |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
935 |
|
1374 | 936 |
double end_time_sec = os::elapsedTime(); |
937 |
double end_vtime_sec = os::elapsedVTime(); |
|
938 |
double elapsed_vtime_sec = end_vtime_sec - start_vtime_sec; |
|
939 |
double elapsed_time_sec = end_time_sec - start_time_sec; |
|
940 |
_cm->clear_has_overflown(); |
|
941 |
||
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
942 |
bool ret = _cm->do_yield_check(worker_id); |
1374 | 943 |
|
944 |
jlong sleep_time_ms; |
|
945 |
if (!_cm->has_aborted() && the_task->has_aborted()) { |
|
946 |
sleep_time_ms = |
|
947 |
(jlong) (elapsed_vtime_sec * _cm->sleep_factor() * 1000.0); |
|
948 |
ConcurrentGCThread::stsLeave(); |
|
949 |
os::sleep(Thread::current(), sleep_time_ms, false); |
|
950 |
ConcurrentGCThread::stsJoin(); |
|
951 |
} |
|
952 |
double end_time2_sec = os::elapsedTime(); |
|
953 |
double elapsed_time2_sec = end_time2_sec - start_time_sec; |
|
954 |
||
955 |
#if 0 |
|
956 |
gclog_or_tty->print_cr("CM: elapsed %1.4lf ms, sleep %1.4lf ms, " |
|
957 |
"overhead %1.4lf", |
|
958 |
elapsed_vtime_sec * 1000.0, (double) sleep_time_ms, |
|
959 |
the_task->conc_overhead(os::elapsedTime()) * 8.0); |
|
960 |
gclog_or_tty->print_cr("elapsed time %1.4lf ms, time 2: %1.4lf ms", |
|
961 |
elapsed_time_sec * 1000.0, elapsed_time2_sec * 1000.0); |
|
962 |
#endif |
|
963 |
} while (!_cm->has_aborted() && the_task->has_aborted()); |
|
964 |
} |
|
965 |
the_task->record_end_time(); |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
966 |
guarantee(!the_task->has_aborted() || _cm->has_aborted(), "invariant"); |
1374 | 967 |
|
968 |
ConcurrentGCThread::stsLeave(); |
|
969 |
||
970 |
double end_vtime = os::elapsedVTime(); |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
971 |
_cm->update_accum_task_vtime(worker_id, end_vtime - start_vtime); |
1374 | 972 |
} |
973 |
||
974 |
CMConcurrentMarkingTask(ConcurrentMark* cm, |
|
975 |
ConcurrentMarkThread* cmt) : |
|
976 |
AbstractGangTask("Concurrent Mark"), _cm(cm), _cmt(cmt) { } |
|
977 |
||
978 |
~CMConcurrentMarkingTask() { } |
|
979 |
}; |
|
980 |
||
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
981 |
// Calculates the number of active workers for a concurrent |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
982 |
// phase. |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
983 |
uint ConcurrentMark::calc_parallel_marking_threads() { |
11250 | 984 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
985 |
uint n_conc_workers = 0; |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
986 |
if (!UseDynamicNumberOfGCThreads || |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
987 |
(!FLAG_IS_DEFAULT(ConcGCThreads) && |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
988 |
!ForceDynamicNumberOfGCThreads)) { |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
989 |
n_conc_workers = max_parallel_marking_threads(); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
990 |
} else { |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
991 |
n_conc_workers = |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
992 |
AdaptiveSizePolicy::calc_default_active_workers( |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
993 |
max_parallel_marking_threads(), |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
994 |
1, /* Minimum workers */ |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
995 |
parallel_marking_threads(), |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
996 |
Threads::number_of_non_daemon_threads()); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
997 |
// Don't scale down "n_conc_workers" by scale_parallel_threads() because |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
998 |
// that scaling has already gone into "_max_parallel_marking_threads". |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
999 |
} |
11250 | 1000 |
assert(n_conc_workers > 0, "Always need at least 1"); |
1001 |
return n_conc_workers; |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
1002 |
} |
11250 | 1003 |
// If we are not running with any parallel GC threads we will not |
1004 |
// have spawned any marking threads either. Hence the number of |
|
1005 |
// concurrent workers should be 0. |
|
1006 |
return 0; |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
1007 |
} |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
1008 |
|
11584
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
1009 |
void ConcurrentMark::scanRootRegion(HeapRegion* hr, uint worker_id) { |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
1010 |
// Currently, only survivors can be root regions. |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
1011 |
assert(hr->next_top_at_mark_start() == hr->bottom(), "invariant"); |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11583
diff
changeset
|
1012 |
G1RootRegionScanClosure cl(_g1h, this, worker_id); |
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|
1013 |
|
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|
1014 |
const uintx interval = PrefetchScanIntervalInBytes; |
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|
1015 |
HeapWord* curr = hr->bottom(); |
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|
1016 |
const HeapWord* end = hr->top(); |
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changeset
|
1017 |
while (curr < end) { |
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changeset
|
1018 |
Prefetch::read(curr, interval); |
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changeset
|
1019 |
oop obj = oop(curr); |
e1df4d08a1f4
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changeset
|
1020 |
int size = obj->oop_iterate(&cl); |
e1df4d08a1f4
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changeset
|
1021 |
assert(size == obj->size(), "sanity"); |
e1df4d08a1f4
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changeset
|
1022 |
curr += size; |
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diff
changeset
|
1023 |
} |
e1df4d08a1f4
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parents:
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diff
changeset
|
1024 |
} |
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diff
changeset
|
1025 |
|
e1df4d08a1f4
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changeset
|
1026 |
class CMRootRegionScanTask : public AbstractGangTask { |
e1df4d08a1f4
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|
1027 |
private: |
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|
1028 |
ConcurrentMark* _cm; |
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changeset
|
1029 |
|
e1df4d08a1f4
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changeset
|
1030 |
public: |
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|
1031 |
CMRootRegionScanTask(ConcurrentMark* cm) : |
e1df4d08a1f4
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|
1032 |
AbstractGangTask("Root Region Scan"), _cm(cm) { } |
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changeset
|
1033 |
|
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changeset
|
1034 |
void work(uint worker_id) { |
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changeset
|
1035 |
assert(Thread::current()->is_ConcurrentGC_thread(), |
e1df4d08a1f4
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changeset
|
1036 |
"this should only be done by a conc GC thread"); |
e1df4d08a1f4
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changeset
|
1037 |
|
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changeset
|
1038 |
CMRootRegions* root_regions = _cm->root_regions(); |
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changeset
|
1039 |
HeapRegion* hr = root_regions->claim_next(); |
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changeset
|
1040 |
while (hr != NULL) { |
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changeset
|
1041 |
_cm->scanRootRegion(hr, worker_id); |
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changeset
|
1042 |
hr = root_regions->claim_next(); |
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diff
changeset
|
1043 |
} |
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parents:
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diff
changeset
|
1044 |
} |
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parents:
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diff
changeset
|
1045 |
}; |
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parents:
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diff
changeset
|
1046 |
|
e1df4d08a1f4
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parents:
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changeset
|
1047 |
void ConcurrentMark::scanRootRegions() { |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
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parents:
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diff
changeset
|
1048 |
// scan_in_progress() will have been set to true only if there was |
e1df4d08a1f4
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parents:
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diff
changeset
|
1049 |
// at least one root region to scan. So, if it's false, we |
e1df4d08a1f4
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changeset
|
1050 |
// should not attempt to do any further work. |
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changeset
|
1051 |
if (root_regions()->scan_in_progress()) { |
e1df4d08a1f4
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changeset
|
1052 |
_parallel_marking_threads = calc_parallel_marking_threads(); |
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changeset
|
1053 |
assert(parallel_marking_threads() <= max_parallel_marking_threads(), |
e1df4d08a1f4
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diff
changeset
|
1054 |
"Maximum number of marking threads exceeded"); |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
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diff
changeset
|
1055 |
uint active_workers = MAX2(1U, parallel_marking_threads()); |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
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diff
changeset
|
1056 |
|
e1df4d08a1f4
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parents:
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diff
changeset
|
1057 |
CMRootRegionScanTask task(this); |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
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parents:
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diff
changeset
|
1058 |
if (parallel_marking_threads() > 0) { |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
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parents:
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diff
changeset
|
1059 |
_parallel_workers->set_active_workers((int) active_workers); |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
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diff
changeset
|
1060 |
_parallel_workers->run_task(&task); |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
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parents:
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diff
changeset
|
1061 |
} else { |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
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parents:
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diff
changeset
|
1062 |
task.work(0); |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
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diff
changeset
|
1063 |
} |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
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diff
changeset
|
1064 |
|
e1df4d08a1f4
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parents:
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diff
changeset
|
1065 |
// It's possible that has_aborted() is true here without actually |
e1df4d08a1f4
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parents:
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diff
changeset
|
1066 |
// aborting the survivor scan earlier. This is OK as it's |
e1df4d08a1f4
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parents:
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diff
changeset
|
1067 |
// mainly used for sanity checking. |
e1df4d08a1f4
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parents:
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diff
changeset
|
1068 |
root_regions()->scan_finished(); |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
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parents:
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diff
changeset
|
1069 |
} |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
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parents:
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diff
changeset
|
1070 |
} |
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parents:
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diff
changeset
|
1071 |
|
1374 | 1072 |
void ConcurrentMark::markFromRoots() { |
1073 |
// we might be tempted to assert that: |
|
1074 |
// assert(asynch == !SafepointSynchronize::is_at_safepoint(), |
|
1075 |
// "inconsistent argument?"); |
|
1076 |
// However that wouldn't be right, because it's possible that |
|
1077 |
// a safepoint is indeed in progress as a younger generation |
|
1078 |
// stop-the-world GC happens even as we mark in this generation. |
|
1079 |
||
1080 |
_restart_for_overflow = false; |
|
9417
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
1081 |
force_overflow_conc()->init(); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
1082 |
|
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
1083 |
// _g1h has _n_par_threads |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
1084 |
_parallel_marking_threads = calc_parallel_marking_threads(); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
1085 |
assert(parallel_marking_threads() <= max_parallel_marking_threads(), |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
1086 |
"Maximum number of marking threads exceeded"); |
11250 | 1087 |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
1088 |
uint active_workers = MAX2(1U, parallel_marking_threads()); |
11250 | 1089 |
|
1090 |
// Parallel task terminator is set in "set_phase()" |
|
1091 |
set_phase(active_workers, true /* concurrent */); |
|
1374 | 1092 |
|
1093 |
CMConcurrentMarkingTask markingTask(this, cmThread()); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
1094 |
if (parallel_marking_threads() > 0) { |
11250 | 1095 |
_parallel_workers->set_active_workers((int)active_workers); |
1096 |
// Don't set _n_par_threads because it affects MT in proceess_strong_roots() |
|
1097 |
// and the decisions on that MT processing is made elsewhere. |
|
1098 |
assert(_parallel_workers->active_workers() > 0, "Should have been set"); |
|
1374 | 1099 |
_parallel_workers->run_task(&markingTask); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
1100 |
} else { |
1374 | 1101 |
markingTask.work(0); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
1102 |
} |
1374 | 1103 |
print_stats(); |
1104 |
} |
|
1105 |
||
1106 |
void ConcurrentMark::checkpointRootsFinal(bool clear_all_soft_refs) { |
|
1107 |
// world is stopped at this checkpoint |
|
1108 |
assert(SafepointSynchronize::is_at_safepoint(), |
|
1109 |
"world should be stopped"); |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10668
diff
changeset
|
1110 |
|
1374 | 1111 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
1112 |
||
1113 |
// If a full collection has happened, we shouldn't do this. |
|
1114 |
if (has_aborted()) { |
|
1115 |
g1h->set_marking_complete(); // So bitmap clearing isn't confused |
|
1116 |
return; |
|
1117 |
} |
|
1118 |
||
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7657
diff
changeset
|
1119 |
SvcGCMarker sgcm(SvcGCMarker::OTHER); |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7657
diff
changeset
|
1120 |
|
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
1121 |
if (VerifyDuringGC) { |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
1122 |
HandleMark hm; // handle scope |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
1123 |
gclog_or_tty->print(" VerifyDuringGC:(before)"); |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
1124 |
Universe::heap()->prepare_for_verify(); |
12379 | 1125 |
Universe::verify(/* silent */ false, |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
1126 |
/* option */ VerifyOption_G1UsePrevMarking); |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
1127 |
} |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
1128 |
|
1374 | 1129 |
G1CollectorPolicy* g1p = g1h->g1_policy(); |
1130 |
g1p->record_concurrent_mark_remark_start(); |
|
1131 |
||
1132 |
double start = os::elapsedTime(); |
|
1133 |
||
1134 |
checkpointRootsFinalWork(); |
|
1135 |
||
1136 |
double mark_work_end = os::elapsedTime(); |
|
1137 |
||
1138 |
weakRefsWork(clear_all_soft_refs); |
|
1139 |
||
1140 |
if (has_overflown()) { |
|
1141 |
// Oops. We overflowed. Restart concurrent marking. |
|
1142 |
_restart_for_overflow = true; |
|
1143 |
// Clear the flag. We do not need it any more. |
|
1144 |
clear_has_overflown(); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
1145 |
if (G1TraceMarkStackOverflow) { |
1374 | 1146 |
gclog_or_tty->print_cr("\nRemark led to restart for overflow."); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
1147 |
} |
1374 | 1148 |
} else { |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1149 |
// Aggregate the per-task counting data that we have accumulated |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1150 |
// while marking. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1151 |
aggregate_count_data(); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1152 |
|
7920 | 1153 |
SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); |
1374 | 1154 |
// We're done with marking. |
5082
19e725a3d2eb
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
5079
diff
changeset
|
1155 |
// This is the end of the marking cycle, we're expected all |
19e725a3d2eb
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
5079
diff
changeset
|
1156 |
// threads to have SATB queues with active set to true. |
7920 | 1157 |
satb_mq_set.set_active_all_threads(false, /* new active value */ |
1158 |
true /* expected_active */); |
|
3000 | 1159 |
|
1160 |
if (VerifyDuringGC) { |
|
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
1161 |
HandleMark hm; // handle scope |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
1162 |
gclog_or_tty->print(" VerifyDuringGC:(after)"); |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
1163 |
Universe::heap()->prepare_for_verify(); |
12379 | 1164 |
Universe::verify(/* silent */ false, |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
1165 |
/* option */ VerifyOption_G1UseNextMarking); |
3000 | 1166 |
} |
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
1167 |
assert(!restart_for_overflow(), "sanity"); |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
1168 |
} |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
1169 |
|
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
1170 |
// Reset the marking state if marking completed |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
1171 |
if (!restart_for_overflow()) { |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
1172 |
set_non_marking_state(); |
1374 | 1173 |
} |
1174 |
||
1175 |
#if VERIFY_OBJS_PROCESSED |
|
1176 |
_scan_obj_cl.objs_processed = 0; |
|
1177 |
ThreadLocalObjQueue::objs_enqueued = 0; |
|
1178 |
#endif |
|
1179 |
||
1180 |
// Statistics |
|
1181 |
double now = os::elapsedTime(); |
|
1182 |
_remark_mark_times.add((mark_work_end - start) * 1000.0); |
|
1183 |
_remark_weak_ref_times.add((now - mark_work_end) * 1000.0); |
|
1184 |
_remark_times.add((now - start) * 1000.0); |
|
1185 |
||
1186 |
g1p->record_concurrent_mark_remark_end(); |
|
1187 |
} |
|
1188 |
||
12508
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|
1189 |
// Base class of the closures that finalize and verify the |
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|
1190 |
// liveness counting data. |
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|
1191 |
class CMCountDataClosureBase: public HeapRegionClosure { |
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|
1192 |
protected: |
1374 | 1193 |
ConcurrentMark* _cm; |
1194 |
BitMap* _region_bm; |
|
1195 |
BitMap* _card_bm; |
|
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|
1196 |
|
12508
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|
1197 |
void set_card_bitmap_range(BitMap::idx_t start_idx, BitMap::idx_t last_idx) { |
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|
1198 |
assert(start_idx <= last_idx, "sanity"); |
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|
1199 |
|
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|
1200 |
// Set the inclusive bit range [start_idx, last_idx]. |
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|
1201 |
// For small ranges (up to 8 cards) use a simple loop; otherwise |
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|
1202 |
// use par_at_put_range. |
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|
1203 |
if ((last_idx - start_idx) < 8) { |
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|
1204 |
for (BitMap::idx_t i = start_idx; i <= last_idx; i += 1) { |
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|
1205 |
_card_bm->par_set_bit(i); |
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|
1206 |
} |
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|
1207 |
} else { |
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|
1208 |
assert(last_idx < _card_bm->size(), "sanity"); |
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|
1209 |
// Note BitMap::par_at_put_range() is exclusive. |
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|
1210 |
_card_bm->par_at_put_range(start_idx, last_idx+1, true); |
1374 | 1211 |
} |
1212 |
} |
|
1213 |
||
3182 | 1214 |
// It takes a region that's not empty (i.e., it has at least one |
1215 |
// live object in it and sets its corresponding bit on the region |
|
1216 |
// bitmap to 1. If the region is "starts humongous" it will also set |
|
1217 |
// to 1 the bits on the region bitmap that correspond to its |
|
1218 |
// associated "continues humongous" regions. |
|
1219 |
void set_bit_for_region(HeapRegion* hr) { |
|
1220 |
assert(!hr->continuesHumongous(), "should have filtered those out"); |
|
1221 |
||
12381
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|
1222 |
BitMap::idx_t index = (BitMap::idx_t) hr->hrs_index(); |
3182 | 1223 |
if (!hr->startsHumongous()) { |
1224 |
// Normal (non-humongous) case: just set the bit. |
|
12381
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changeset
|
1225 |
_region_bm->par_at_put(index, true); |
3182 | 1226 |
} else { |
1227 |
// Starts humongous case: calculate how many regions are part of |
|
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|
1228 |
// this humongous region and then set the bit range. |
3182 | 1229 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
11583
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|
1230 |
HeapRegion *last_hr = g1h->heap_region_containing_raw(hr->end() - 1); |
12381
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|
1231 |
BitMap::idx_t end_index = (BitMap::idx_t) last_hr->hrs_index() + 1; |
1438e0fbfa27
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changeset
|
1232 |
_region_bm->par_at_put_range(index, end_index, true); |
3182 | 1233 |
} |
1234 |
} |
|
1235 |
||
12508
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|
1236 |
public: |
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|
1237 |
CMCountDataClosureBase(ConcurrentMark *cm, |
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|
1238 |
BitMap* region_bm, BitMap* card_bm): |
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|
1239 |
_cm(cm), _region_bm(region_bm), _card_bm(card_bm) { } |
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|
1240 |
}; |
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diff
changeset
|
1241 |
|
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changeset
|
1242 |
// Closure that calculates the # live objects per region. Used |
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|
1243 |
// for verification purposes during the cleanup pause. |
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|
1244 |
class CalcLiveObjectsClosure: public CMCountDataClosureBase { |
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|
1245 |
CMBitMapRO* _bm; |
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|
1246 |
size_t _region_marked_bytes; |
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changeset
|
1247 |
|
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changeset
|
1248 |
public: |
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changeset
|
1249 |
CalcLiveObjectsClosure(CMBitMapRO *bm, ConcurrentMark *cm, |
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changeset
|
1250 |
BitMap* region_bm, BitMap* card_bm) : |
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changeset
|
1251 |
CMCountDataClosureBase(cm, region_bm, card_bm), |
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changeset
|
1252 |
_bm(bm), _region_marked_bytes(0) { } |
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changeset
|
1253 |
|
1374 | 1254 |
bool doHeapRegion(HeapRegion* hr) { |
1255 |
||
2251 | 1256 |
if (hr->continuesHumongous()) { |
3182 | 1257 |
// We will ignore these here and process them when their |
1258 |
// associated "starts humongous" region is processed (see |
|
1259 |
// set_bit_for_heap_region()). Note that we cannot rely on their |
|
1260 |
// associated "starts humongous" region to have their bit set to |
|
1261 |
// 1 since, due to the region chunking in the parallel region |
|
1262 |
// iteration, a "continues humongous" region might be visited |
|
1263 |
// before its associated "starts humongous". |
|
2251 | 1264 |
return false; |
1265 |
} |
|
1374 | 1266 |
|
1267 |
HeapWord* nextTop = hr->next_top_at_mark_start(); |
|
11583
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changeset
|
1268 |
HeapWord* start = hr->bottom(); |
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changeset
|
1269 |
|
83a7383de44c
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changeset
|
1270 |
assert(start <= hr->end() && start <= nextTop && nextTop <= hr->end(), |
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changeset
|
1271 |
err_msg("Preconditions not met - " |
83a7383de44c
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changeset
|
1272 |
"start: "PTR_FORMAT", nextTop: "PTR_FORMAT", end: "PTR_FORMAT, |
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changeset
|
1273 |
start, nextTop, hr->end())); |
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changeset
|
1274 |
|
1374 | 1275 |
// Find the first marked object at or after "start". |
1276 |
start = _bm->getNextMarkedWordAddress(start, nextTop); |
|
11583
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changeset
|
1277 |
|
1374 | 1278 |
size_t marked_bytes = 0; |
1279 |
||
1280 |
while (start < nextTop) { |
|
1281 |
oop obj = oop(start); |
|
1282 |
int obj_sz = obj->size(); |
|
1283 |
HeapWord* obj_last = start + obj_sz - 1; |
|
12508
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diff
changeset
|
1284 |
|
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diff
changeset
|
1285 |
BitMap::idx_t start_idx = _cm->card_bitmap_index_for(start); |
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changeset
|
1286 |
BitMap::idx_t last_idx = _cm->card_bitmap_index_for(obj_last); |
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changeset
|
1287 |
|
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diff
changeset
|
1288 |
// Set the bits in the card BM for this object (inclusive). |
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changeset
|
1289 |
set_card_bitmap_range(start_idx, last_idx); |
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diff
changeset
|
1290 |
|
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diff
changeset
|
1291 |
// Add the size of this object to the number of marked bytes. |
4033
b4c91a37edea
6858886: G1: guarantee(_next_marked_bytes <= used(),"invariant") at heapRegion.hpp:359
apetrusenko
parents:
4026
diff
changeset
|
1292 |
marked_bytes += (size_t)obj_sz * HeapWordSize; |
11583
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changeset
|
1293 |
|
1374 | 1294 |
// Find the next marked object after this one. |
12508
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diff
changeset
|
1295 |
start = _bm->getNextMarkedWordAddress(obj_last + 1, nextTop); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
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diff
changeset
|
1296 |
} |
11583
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changeset
|
1297 |
|
83a7383de44c
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changeset
|
1298 |
// Mark the allocated-since-marking portion... |
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changeset
|
1299 |
HeapWord* top = hr->top(); |
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changeset
|
1300 |
if (nextTop < top) { |
12508
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changeset
|
1301 |
BitMap::idx_t start_idx = _cm->card_bitmap_index_for(nextTop); |
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changeset
|
1302 |
BitMap::idx_t last_idx = _cm->card_bitmap_index_for(top - 1); |
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changeset
|
1303 |
|
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diff
changeset
|
1304 |
set_card_bitmap_range(start_idx, last_idx); |
11583
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changeset
|
1305 |
|
83a7383de44c
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changeset
|
1306 |
// This definitely means the region has live objects. |
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changeset
|
1307 |
set_bit_for_region(hr); |
1374 | 1308 |
} |
1309 |
||
1310 |
// Update the live region bitmap. |
|
1311 |
if (marked_bytes > 0) { |
|
3182 | 1312 |
set_bit_for_region(hr); |
1374 | 1313 |
} |
11583
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changeset
|
1314 |
|
83a7383de44c
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changeset
|
1315 |
// Set the marked bytes for the current region so that |
83a7383de44c
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changeset
|
1316 |
// it can be queried by a calling verificiation routine |
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changeset
|
1317 |
_region_marked_bytes = marked_bytes; |
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changeset
|
1318 |
|
1374 | 1319 |
return false; |
1320 |
} |
|
1321 |
||
11583
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changeset
|
1322 |
size_t region_marked_bytes() const { return _region_marked_bytes; } |
83a7383de44c
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changeset
|
1323 |
}; |
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changeset
|
1324 |
|
83a7383de44c
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changeset
|
1325 |
// Heap region closure used for verifying the counting data |
83a7383de44c
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changeset
|
1326 |
// that was accumulated concurrently and aggregated during |
83a7383de44c
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changeset
|
1327 |
// the remark pause. This closure is applied to the heap |
83a7383de44c
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changeset
|
1328 |
// regions during the STW cleanup pause. |
83a7383de44c
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changeset
|
1329 |
|
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changeset
|
1330 |
class VerifyLiveObjectDataHRClosure: public HeapRegionClosure { |
83a7383de44c
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changeset
|
1331 |
ConcurrentMark* _cm; |
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changeset
|
1332 |
CalcLiveObjectsClosure _calc_cl; |
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changeset
|
1333 |
BitMap* _region_bm; // Region BM to be verified |
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changeset
|
1334 |
BitMap* _card_bm; // Card BM to be verified |
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changeset
|
1335 |
bool _verbose; // verbose output? |
83a7383de44c
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changeset
|
1336 |
|
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changeset
|
1337 |
BitMap* _exp_region_bm; // Expected Region BM values |
83a7383de44c
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changeset
|
1338 |
BitMap* _exp_card_bm; // Expected card BM values |
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changeset
|
1339 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1340 |
int _failures; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1341 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1342 |
public: |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1343 |
VerifyLiveObjectDataHRClosure(ConcurrentMark* cm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1344 |
BitMap* region_bm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1345 |
BitMap* card_bm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1346 |
BitMap* exp_region_bm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1347 |
BitMap* exp_card_bm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1348 |
bool verbose) : |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1349 |
_cm(cm), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1350 |
_calc_cl(_cm->nextMarkBitMap(), _cm, exp_region_bm, exp_card_bm), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1351 |
_region_bm(region_bm), _card_bm(card_bm), _verbose(verbose), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1352 |
_exp_region_bm(exp_region_bm), _exp_card_bm(exp_card_bm), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1353 |
_failures(0) { } |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1354 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1355 |
int failures() const { return _failures; } |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1356 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1357 |
bool doHeapRegion(HeapRegion* hr) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1358 |
if (hr->continuesHumongous()) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1359 |
// We will ignore these here and process them when their |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1360 |
// associated "starts humongous" region is processed (see |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1361 |
// set_bit_for_heap_region()). Note that we cannot rely on their |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1362 |
// associated "starts humongous" region to have their bit set to |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1363 |
// 1 since, due to the region chunking in the parallel region |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1364 |
// iteration, a "continues humongous" region might be visited |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1365 |
// before its associated "starts humongous". |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1366 |
return false; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1367 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1368 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1369 |
int failures = 0; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1370 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1371 |
// Call the CalcLiveObjectsClosure to walk the marking bitmap for |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1372 |
// this region and set the corresponding bits in the expected region |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1373 |
// and card bitmaps. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1374 |
bool res = _calc_cl.doHeapRegion(hr); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1375 |
assert(res == false, "should be continuing"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1376 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1377 |
MutexLockerEx x((_verbose ? ParGCRareEvent_lock : NULL), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1378 |
Mutex::_no_safepoint_check_flag); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1379 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1380 |
// Verify the marked bytes for this region. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1381 |
size_t exp_marked_bytes = _calc_cl.region_marked_bytes(); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1382 |
size_t act_marked_bytes = hr->next_marked_bytes(); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1383 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1384 |
// We're not OK if expected marked bytes > actual marked bytes. It means |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1385 |
// we have missed accounting some objects during the actual marking. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1386 |
if (exp_marked_bytes > act_marked_bytes) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1387 |
if (_verbose) { |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
1388 |
gclog_or_tty->print_cr("Region %u: marked bytes mismatch: " |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1389 |
"expected: " SIZE_FORMAT ", actual: " SIZE_FORMAT, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1390 |
hr->hrs_index(), exp_marked_bytes, act_marked_bytes); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1391 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1392 |
failures += 1; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1393 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1394 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1395 |
// Verify the bit, for this region, in the actual and expected |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1396 |
// (which was just calculated) region bit maps. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1397 |
// We're not OK if the bit in the calculated expected region |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1398 |
// bitmap is set and the bit in the actual region bitmap is not. |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
1399 |
BitMap::idx_t index = (BitMap::idx_t) hr->hrs_index(); |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1400 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1401 |
bool expected = _exp_region_bm->at(index); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1402 |
bool actual = _region_bm->at(index); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1403 |
if (expected && !actual) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1404 |
if (_verbose) { |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
1405 |
gclog_or_tty->print_cr("Region %u: region bitmap mismatch: " |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
1406 |
"expected: %s, actual: %s", |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
1407 |
hr->hrs_index(), |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
1408 |
BOOL_TO_STR(expected), BOOL_TO_STR(actual)); |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1409 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1410 |
failures += 1; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1411 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1412 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1413 |
// Verify that the card bit maps for the cards spanned by the current |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1414 |
// region match. We have an error if we have a set bit in the expected |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1415 |
// bit map and the corresponding bit in the actual bitmap is not set. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1416 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1417 |
BitMap::idx_t start_idx = _cm->card_bitmap_index_for(hr->bottom()); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1418 |
BitMap::idx_t end_idx = _cm->card_bitmap_index_for(hr->top()); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1419 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1420 |
for (BitMap::idx_t i = start_idx; i < end_idx; i+=1) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1421 |
expected = _exp_card_bm->at(i); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1422 |
actual = _card_bm->at(i); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1423 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1424 |
if (expected && !actual) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1425 |
if (_verbose) { |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
1426 |
gclog_or_tty->print_cr("Region %u: card bitmap mismatch at " SIZE_FORMAT ": " |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
1427 |
"expected: %s, actual: %s", |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
1428 |
hr->hrs_index(), i, |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
1429 |
BOOL_TO_STR(expected), BOOL_TO_STR(actual)); |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1430 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1431 |
failures += 1; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1432 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1433 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1434 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1435 |
if (failures > 0 && _verbose) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1436 |
gclog_or_tty->print_cr("Region " HR_FORMAT ", ntams: " PTR_FORMAT ", " |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1437 |
"marked_bytes: calc/actual " SIZE_FORMAT "/" SIZE_FORMAT, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1438 |
HR_FORMAT_PARAMS(hr), hr->next_top_at_mark_start(), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1439 |
_calc_cl.region_marked_bytes(), hr->next_marked_bytes()); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1440 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1441 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1442 |
_failures += failures; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1443 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1444 |
// We could stop iteration over the heap when we |
12508
d76458352d62
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
12382
diff
changeset
|
1445 |
// find the first violating region by returning true. |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1446 |
return false; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1447 |
} |
1374 | 1448 |
}; |
1449 |
||
1450 |
||
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1451 |
class G1ParVerifyFinalCountTask: public AbstractGangTask { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1452 |
protected: |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1453 |
G1CollectedHeap* _g1h; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1454 |
ConcurrentMark* _cm; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1455 |
BitMap* _actual_region_bm; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1456 |
BitMap* _actual_card_bm; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1457 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1458 |
uint _n_workers; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1459 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1460 |
BitMap* _expected_region_bm; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1461 |
BitMap* _expected_card_bm; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1462 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1463 |
int _failures; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1464 |
bool _verbose; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1465 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1466 |
public: |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1467 |
G1ParVerifyFinalCountTask(G1CollectedHeap* g1h, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1468 |
BitMap* region_bm, BitMap* card_bm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1469 |
BitMap* expected_region_bm, BitMap* expected_card_bm) |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1470 |
: AbstractGangTask("G1 verify final counting"), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1471 |
_g1h(g1h), _cm(_g1h->concurrent_mark()), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1472 |
_actual_region_bm(region_bm), _actual_card_bm(card_bm), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1473 |
_expected_region_bm(expected_region_bm), _expected_card_bm(expected_card_bm), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1474 |
_failures(0), _verbose(false), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1475 |
_n_workers(0) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1476 |
assert(VerifyDuringGC, "don't call this otherwise"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1477 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1478 |
// Use the value already set as the number of active threads |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1479 |
// in the call to run_task(). |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1480 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1481 |
assert( _g1h->workers()->active_workers() > 0, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1482 |
"Should have been previously set"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1483 |
_n_workers = _g1h->workers()->active_workers(); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1484 |
} else { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1485 |
_n_workers = 1; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1486 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1487 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1488 |
assert(_expected_card_bm->size() == _actual_card_bm->size(), "sanity"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1489 |
assert(_expected_region_bm->size() == _actual_region_bm->size(), "sanity"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1490 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1491 |
_verbose = _cm->verbose_medium(); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1492 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1493 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1494 |
void work(uint worker_id) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1495 |
assert(worker_id < _n_workers, "invariant"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1496 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1497 |
VerifyLiveObjectDataHRClosure verify_cl(_cm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1498 |
_actual_region_bm, _actual_card_bm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1499 |
_expected_region_bm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1500 |
_expected_card_bm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1501 |
_verbose); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1502 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1503 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1504 |
_g1h->heap_region_par_iterate_chunked(&verify_cl, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1505 |
worker_id, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1506 |
_n_workers, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1507 |
HeapRegion::VerifyCountClaimValue); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1508 |
} else { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1509 |
_g1h->heap_region_iterate(&verify_cl); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1510 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1511 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1512 |
Atomic::add(verify_cl.failures(), &_failures); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1513 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1514 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1515 |
int failures() const { return _failures; } |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1516 |
}; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1517 |
|
12508
d76458352d62
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
12382
diff
changeset
|
1518 |
// Closure that finalizes the liveness counting data. |
d76458352d62
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
12382
diff
changeset
|
1519 |
// Used during the cleanup pause. |
d76458352d62
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
12382
diff
changeset
|
1520 |
// Sets the bits corresponding to the interval [NTAMS, top] |
d76458352d62
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
12382
diff
changeset
|
1521 |
// (which contains the implicitly live objects) in the |
d76458352d62
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
12382
diff
changeset
|
1522 |
// card liveness bitmap. Also sets the bit for each region, |
d76458352d62
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
12382
diff
changeset
|
1523 |
// containing live data, in the region liveness bitmap. |
d76458352d62
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
12382
diff
changeset
|
1524 |
|
d76458352d62
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
12382
diff
changeset
|
1525 |
class FinalCountDataUpdateClosure: public CMCountDataClosureBase { |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1526 |
public: |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1527 |
FinalCountDataUpdateClosure(ConcurrentMark* cm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1528 |
BitMap* region_bm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1529 |
BitMap* card_bm) : |
12508
d76458352d62
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
12382
diff
changeset
|
1530 |
CMCountDataClosureBase(cm, region_bm, card_bm) { } |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1531 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1532 |
bool doHeapRegion(HeapRegion* hr) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1533 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1534 |
if (hr->continuesHumongous()) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1535 |
// We will ignore these here and process them when their |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1536 |
// associated "starts humongous" region is processed (see |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1537 |
// set_bit_for_heap_region()). Note that we cannot rely on their |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1538 |
// associated "starts humongous" region to have their bit set to |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1539 |
// 1 since, due to the region chunking in the parallel region |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1540 |
// iteration, a "continues humongous" region might be visited |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1541 |
// before its associated "starts humongous". |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1542 |
return false; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1543 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1544 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1545 |
HeapWord* ntams = hr->next_top_at_mark_start(); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1546 |
HeapWord* top = hr->top(); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1547 |
|
12508
d76458352d62
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
12382
diff
changeset
|
1548 |
assert(hr->bottom() <= ntams && ntams <= hr->end(), "Preconditions."); |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1549 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1550 |
// Mark the allocated-since-marking portion... |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1551 |
if (ntams < top) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1552 |
// This definitely means the region has live objects. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1553 |
set_bit_for_region(hr); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1554 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1555 |
|
12508
d76458352d62
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
12382
diff
changeset
|
1556 |
// Now set the bits for [ntams, top] |
d76458352d62
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
12382
diff
changeset
|
1557 |
BitMap::idx_t start_idx = _cm->card_bitmap_index_for(ntams); |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1558 |
BitMap::idx_t last_idx = _cm->card_bitmap_index_for(top); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1559 |
set_card_bitmap_range(start_idx, last_idx); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1560 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1561 |
// Set the bit for the region if it contains live data |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1562 |
if (hr->next_marked_bytes() > 0) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1563 |
set_bit_for_region(hr); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1564 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1565 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1566 |
return false; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1567 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1568 |
}; |
1374 | 1569 |
|
1570 |
class G1ParFinalCountTask: public AbstractGangTask { |
|
1571 |
protected: |
|
1572 |
G1CollectedHeap* _g1h; |
|
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1573 |
ConcurrentMark* _cm; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1574 |
BitMap* _actual_region_bm; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1575 |
BitMap* _actual_card_bm; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1576 |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
1577 |
uint _n_workers; |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1578 |
|
1374 | 1579 |
public: |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1580 |
G1ParFinalCountTask(G1CollectedHeap* g1h, BitMap* region_bm, BitMap* card_bm) |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1581 |
: AbstractGangTask("G1 final counting"), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1582 |
_g1h(g1h), _cm(_g1h->concurrent_mark()), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1583 |
_actual_region_bm(region_bm), _actual_card_bm(card_bm), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1584 |
_n_workers(0) { |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
1585 |
// Use the value already set as the number of active threads |
12382
6aaecb1cbfe1
7145441: G1: collection set chooser-related cleanup
tonyp
parents:
12381
diff
changeset
|
1586 |
// in the call to run_task(). |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
1587 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
1588 |
assert( _g1h->workers()->active_workers() > 0, |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
1589 |
"Should have been previously set"); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
1590 |
_n_workers = _g1h->workers()->active_workers(); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
1591 |
} else { |
1374 | 1592 |
_n_workers = 1; |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
1593 |
} |
1374 | 1594 |
} |
1595 |
||
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
1596 |
void work(uint worker_id) { |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1597 |
assert(worker_id < _n_workers, "invariant"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1598 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1599 |
FinalCountDataUpdateClosure final_update_cl(_cm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1600 |
_actual_region_bm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1601 |
_actual_card_bm); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1602 |
|
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
6261
diff
changeset
|
1603 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1604 |
_g1h->heap_region_par_iterate_chunked(&final_update_cl, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1605 |
worker_id, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1606 |
_n_workers, |
1387 | 1607 |
HeapRegion::FinalCountClaimValue); |
1374 | 1608 |
} else { |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1609 |
_g1h->heap_region_iterate(&final_update_cl); |
1374 | 1610 |
} |
1611 |
} |
|
1612 |
}; |
|
1613 |
||
1614 |
class G1ParNoteEndTask; |
|
1615 |
||
1616 |
class G1NoteEndOfConcMarkClosure : public HeapRegionClosure { |
|
1617 |
G1CollectedHeap* _g1; |
|
1618 |
int _worker_num; |
|
1619 |
size_t _max_live_bytes; |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
1620 |
uint _regions_claimed; |
1374 | 1621 |
size_t _freed_bytes; |
8072 | 1622 |
FreeRegionList* _local_cleanup_list; |
10996 | 1623 |
OldRegionSet* _old_proxy_set; |
8072 | 1624 |
HumongousRegionSet* _humongous_proxy_set; |
1625 |
HRRSCleanupTask* _hrrs_cleanup_task; |
|
1374 | 1626 |
double _claimed_region_time; |
1627 |
double _max_region_time; |
|
1628 |
||
1629 |
public: |
|
1630 |
G1NoteEndOfConcMarkClosure(G1CollectedHeap* g1, |
|
8072 | 1631 |
int worker_num, |
1632 |
FreeRegionList* local_cleanup_list, |
|
10996 | 1633 |
OldRegionSet* old_proxy_set, |
8072 | 1634 |
HumongousRegionSet* humongous_proxy_set, |
11172
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1635 |
HRRSCleanupTask* hrrs_cleanup_task) : |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1636 |
_g1(g1), _worker_num(worker_num), |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1637 |
_max_live_bytes(0), _regions_claimed(0), |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1638 |
_freed_bytes(0), |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1639 |
_claimed_region_time(0.0), _max_region_time(0.0), |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1640 |
_local_cleanup_list(local_cleanup_list), |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1641 |
_old_proxy_set(old_proxy_set), |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1642 |
_humongous_proxy_set(humongous_proxy_set), |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1643 |
_hrrs_cleanup_task(hrrs_cleanup_task) { } |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1644 |
|
1374 | 1645 |
size_t freed_bytes() { return _freed_bytes; } |
1646 |
||
11172
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1647 |
bool doHeapRegion(HeapRegion *hr) { |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1648 |
// We use a claim value of zero here because all regions |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1649 |
// were claimed with value 1 in the FinalCount task. |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1650 |
hr->reset_gc_time_stamp(); |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1651 |
if (!hr->continuesHumongous()) { |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1652 |
double start = os::elapsedTime(); |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1653 |
_regions_claimed++; |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1654 |
hr->note_end_of_marking(); |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1655 |
_max_live_bytes += hr->max_live_bytes(); |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1656 |
_g1->free_region_if_empty(hr, |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1657 |
&_freed_bytes, |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1658 |
_local_cleanup_list, |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1659 |
_old_proxy_set, |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1660 |
_humongous_proxy_set, |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1661 |
_hrrs_cleanup_task, |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1662 |
true /* par */); |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1663 |
double region_time = (os::elapsedTime() - start); |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1664 |
_claimed_region_time += region_time; |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1665 |
if (region_time > _max_region_time) { |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1666 |
_max_region_time = region_time; |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1667 |
} |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1668 |
} |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1669 |
return false; |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
1670 |
} |
1374 | 1671 |
|
1672 |
size_t max_live_bytes() { return _max_live_bytes; } |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
1673 |
uint regions_claimed() { return _regions_claimed; } |
1374 | 1674 |
double claimed_region_time_sec() { return _claimed_region_time; } |
1675 |
double max_region_time_sec() { return _max_region_time; } |
|
1676 |
}; |
|
1677 |
||
1678 |
class G1ParNoteEndTask: public AbstractGangTask { |
|
1679 |
friend class G1NoteEndOfConcMarkClosure; |
|
7923 | 1680 |
|
1374 | 1681 |
protected: |
1682 |
G1CollectedHeap* _g1h; |
|
1683 |
size_t _max_live_bytes; |
|
1684 |
size_t _freed_bytes; |
|
7923 | 1685 |
FreeRegionList* _cleanup_list; |
1686 |
||
1374 | 1687 |
public: |
1688 |
G1ParNoteEndTask(G1CollectedHeap* g1h, |
|
7923 | 1689 |
FreeRegionList* cleanup_list) : |
1374 | 1690 |
AbstractGangTask("G1 note end"), _g1h(g1h), |
7923 | 1691 |
_max_live_bytes(0), _freed_bytes(0), _cleanup_list(cleanup_list) { } |
1374 | 1692 |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
1693 |
void work(uint worker_id) { |
1374 | 1694 |
double start = os::elapsedTime(); |
8072 | 1695 |
FreeRegionList local_cleanup_list("Local Cleanup List"); |
10996 | 1696 |
OldRegionSet old_proxy_set("Local Cleanup Old Proxy Set"); |
8072 | 1697 |
HumongousRegionSet humongous_proxy_set("Local Cleanup Humongous Proxy Set"); |
1698 |
HRRSCleanupTask hrrs_cleanup_task; |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
1699 |
G1NoteEndOfConcMarkClosure g1_note_end(_g1h, worker_id, &local_cleanup_list, |
10996 | 1700 |
&old_proxy_set, |
8072 | 1701 |
&humongous_proxy_set, |
1702 |
&hrrs_cleanup_task); |
|
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
6261
diff
changeset
|
1703 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
1704 |
_g1h->heap_region_par_iterate_chunked(&g1_note_end, worker_id, |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
1705 |
_g1h->workers()->active_workers(), |
1387 | 1706 |
HeapRegion::NoteEndClaimValue); |
1374 | 1707 |
} else { |
1708 |
_g1h->heap_region_iterate(&g1_note_end); |
|
1709 |
} |
|
1710 |
assert(g1_note_end.complete(), "Shouldn't have yielded!"); |
|
1711 |
||
7923 | 1712 |
// Now update the lists |
1713 |
_g1h->update_sets_after_freeing_regions(g1_note_end.freed_bytes(), |
|
1714 |
NULL /* free_list */, |
|
10996 | 1715 |
&old_proxy_set, |
8072 | 1716 |
&humongous_proxy_set, |
7923 | 1717 |
true /* par */); |
1374 | 1718 |
{ |
1719 |
MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); |
|
1720 |
_max_live_bytes += g1_note_end.max_live_bytes(); |
|
1721 |
_freed_bytes += g1_note_end.freed_bytes(); |
|
7923 | 1722 |
|
10001
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
9999
diff
changeset
|
1723 |
// If we iterate over the global cleanup list at the end of |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
9999
diff
changeset
|
1724 |
// cleanup to do this printing we will not guarantee to only |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
9999
diff
changeset
|
1725 |
// generate output for the newly-reclaimed regions (the list |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
9999
diff
changeset
|
1726 |
// might not be empty at the beginning of cleanup; we might |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
9999
diff
changeset
|
1727 |
// still be working on its previous contents). So we do the |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
9999
diff
changeset
|
1728 |
// printing here, before we append the new regions to the global |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
9999
diff
changeset
|
1729 |
// cleanup list. |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
9999
diff
changeset
|
1730 |
|
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
9999
diff
changeset
|
1731 |
G1HRPrinter* hr_printer = _g1h->hr_printer(); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
9999
diff
changeset
|
1732 |
if (hr_printer->is_active()) { |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
9999
diff
changeset
|
1733 |
HeapRegionLinkedListIterator iter(&local_cleanup_list); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
9999
diff
changeset
|
1734 |
while (iter.more_available()) { |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
9999
diff
changeset
|
1735 |
HeapRegion* hr = iter.get_next(); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
9999
diff
changeset
|
1736 |
hr_printer->cleanup(hr); |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
9999
diff
changeset
|
1737 |
} |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
9999
diff
changeset
|
1738 |
} |
8aa7f885326e
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
9999
diff
changeset
|
1739 |
|
8072 | 1740 |
_cleanup_list->add_as_tail(&local_cleanup_list); |
1741 |
assert(local_cleanup_list.is_empty(), "post-condition"); |
|
1742 |
||
1743 |
HeapRegionRemSet::finish_cleanup_task(&hrrs_cleanup_task); |
|
1374 | 1744 |
} |
1745 |
} |
|
1746 |
size_t max_live_bytes() { return _max_live_bytes; } |
|
1747 |
size_t freed_bytes() { return _freed_bytes; } |
|
1748 |
}; |
|
1749 |
||
1750 |
class G1ParScrubRemSetTask: public AbstractGangTask { |
|
1751 |
protected: |
|
1752 |
G1RemSet* _g1rs; |
|
1753 |
BitMap* _region_bm; |
|
1754 |
BitMap* _card_bm; |
|
1755 |
public: |
|
1756 |
G1ParScrubRemSetTask(G1CollectedHeap* g1h, |
|
1757 |
BitMap* region_bm, BitMap* card_bm) : |
|
1758 |
AbstractGangTask("G1 ScrubRS"), _g1rs(g1h->g1_rem_set()), |
|
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1759 |
_region_bm(region_bm), _card_bm(card_bm) { } |
1374 | 1760 |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
1761 |
void work(uint worker_id) { |
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
6261
diff
changeset
|
1762 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
1763 |
_g1rs->scrub_par(_region_bm, _card_bm, worker_id, |
1387 | 1764 |
HeapRegion::ScrubRemSetClaimValue); |
1374 | 1765 |
} else { |
1766 |
_g1rs->scrub(_region_bm, _card_bm); |
|
1767 |
} |
|
1768 |
} |
|
1769 |
||
1770 |
}; |
|
1771 |
||
1772 |
void ConcurrentMark::cleanup() { |
|
1773 |
// world is stopped at this checkpoint |
|
1774 |
assert(SafepointSynchronize::is_at_safepoint(), |
|
1775 |
"world should be stopped"); |
|
1776 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
1777 |
||
1778 |
// If a full collection has happened, we shouldn't do this. |
|
1779 |
if (has_aborted()) { |
|
1780 |
g1h->set_marking_complete(); // So bitmap clearing isn't confused |
|
1781 |
return; |
|
1782 |
} |
|
1783 |
||
10996 | 1784 |
HRSPhaseSetter x(HRSPhaseCleanup); |
7923 | 1785 |
g1h->verify_region_sets_optional(); |
1786 |
||
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
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changeset
|
1787 |
if (VerifyDuringGC) { |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
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changeset
|
1788 |
HandleMark hm; // handle scope |
30d1c247fc25
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parents:
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diff
changeset
|
1789 |
gclog_or_tty->print(" VerifyDuringGC:(before)"); |
30d1c247fc25
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parents:
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diff
changeset
|
1790 |
Universe::heap()->prepare_for_verify(); |
12379 | 1791 |
Universe::verify(/* silent */ false, |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
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parents:
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diff
changeset
|
1792 |
/* option */ VerifyOption_G1UsePrevMarking); |
3262
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6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
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diff
changeset
|
1793 |
} |
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parents:
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diff
changeset
|
1794 |
|
1374 | 1795 |
G1CollectorPolicy* g1p = G1CollectedHeap::heap()->g1_policy(); |
1796 |
g1p->record_concurrent_mark_cleanup_start(); |
|
1797 |
||
1798 |
double start = os::elapsedTime(); |
|
1799 |
||
8072 | 1800 |
HeapRegionRemSet::reset_for_cleanup_tasks(); |
1801 |
||
11396
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parents:
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diff
changeset
|
1802 |
uint n_workers; |
11174
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6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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parents:
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changeset
|
1803 |
|
1374 | 1804 |
// Do counting once more with the world stopped for good measure. |
11583
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changeset
|
1805 |
G1ParFinalCountTask g1_par_count_task(g1h, &_region_bm, &_card_bm); |
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changeset
|
1806 |
|
6759
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parents:
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diff
changeset
|
1807 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
11583
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parents:
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changeset
|
1808 |
assert(g1h->check_heap_region_claim_values(HeapRegion::InitialClaimValue), |
1387 | 1809 |
"sanity check"); |
1810 |
||
11250 | 1811 |
g1h->set_par_threads(); |
1812 |
n_workers = g1h->n_par_threads(); |
|
11396
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7121618: Change type of number of GC workers to unsigned int.
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parents:
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diff
changeset
|
1813 |
assert(g1h->n_par_threads() == n_workers, |
11250 | 1814 |
"Should not have been reset"); |
1374 | 1815 |
g1h->workers()->run_task(&g1_par_count_task); |
11174
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parents:
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changeset
|
1816 |
// Done with the parallel phase so reset to 0. |
1374 | 1817 |
g1h->set_par_threads(0); |
1387 | 1818 |
|
11583
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changeset
|
1819 |
assert(g1h->check_heap_region_claim_values(HeapRegion::FinalCountClaimValue), |
1387 | 1820 |
"sanity check"); |
1374 | 1821 |
} else { |
11250 | 1822 |
n_workers = 1; |
1374 | 1823 |
g1_par_count_task.work(0); |
1824 |
} |
|
1825 |
||
11583
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changeset
|
1826 |
if (VerifyDuringGC) { |
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|
1827 |
// Verify that the counting data accumulated during marking matches |
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changeset
|
1828 |
// that calculated by walking the marking bitmap. |
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changeset
|
1829 |
|
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changeset
|
1830 |
// Bitmaps to hold expected values |
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changeset
|
1831 |
BitMap expected_region_bm(_region_bm.size(), false); |
83a7383de44c
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changeset
|
1832 |
BitMap expected_card_bm(_card_bm.size(), false); |
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changeset
|
1833 |
|
83a7383de44c
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diff
changeset
|
1834 |
G1ParVerifyFinalCountTask g1_par_verify_task(g1h, |
83a7383de44c
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changeset
|
1835 |
&_region_bm, |
83a7383de44c
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diff
changeset
|
1836 |
&_card_bm, |
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diff
changeset
|
1837 |
&expected_region_bm, |
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parents:
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changeset
|
1838 |
&expected_card_bm); |
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6484965: G1: piggy-back liveness accounting phase on marking
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diff
changeset
|
1839 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
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diff
changeset
|
1840 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
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diff
changeset
|
1841 |
g1h->set_par_threads((int)n_workers); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
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parents:
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changeset
|
1842 |
g1h->workers()->run_task(&g1_par_verify_task); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
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parents:
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changeset
|
1843 |
// Done with the parallel phase so reset to 0. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
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parents:
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diff
changeset
|
1844 |
g1h->set_par_threads(0); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
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parents:
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diff
changeset
|
1845 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
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parents:
11577
diff
changeset
|
1846 |
assert(g1h->check_heap_region_claim_values(HeapRegion::VerifyCountClaimValue), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1847 |
"sanity check"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
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diff
changeset
|
1848 |
} else { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
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diff
changeset
|
1849 |
g1_par_verify_task.work(0); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
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parents:
11577
diff
changeset
|
1850 |
} |
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6484965: G1: piggy-back liveness accounting phase on marking
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parents:
11577
diff
changeset
|
1851 |
|
83a7383de44c
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parents:
11577
diff
changeset
|
1852 |
guarantee(g1_par_verify_task.failures() == 0, "Unexpected accounting failures"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
1853 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
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parents:
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diff
changeset
|
1854 |
|
1374 | 1855 |
size_t start_used_bytes = g1h->used(); |
1856 |
g1h->set_marking_complete(); |
|
1857 |
||
1858 |
double count_end = os::elapsedTime(); |
|
1859 |
double this_final_counting_time = (count_end - start); |
|
1860 |
_total_counting_time += this_final_counting_time; |
|
1861 |
||
8930
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
1862 |
if (G1PrintRegionLivenessInfo) { |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
1863 |
G1PrintRegionLivenessInfoClosure cl(gclog_or_tty, "Post-Marking"); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
1864 |
_g1h->heap_region_iterate(&cl); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
1865 |
} |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
1866 |
|
1374 | 1867 |
// Install newly created mark bitMap as "prev". |
1868 |
swapMarkBitMaps(); |
|
1869 |
||
1870 |
g1h->reset_gc_time_stamp(); |
|
1871 |
||
1872 |
// Note end of marking in all heap regions. |
|
7923 | 1873 |
G1ParNoteEndTask g1_par_note_end_task(g1h, &_cleanup_list); |
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
6261
diff
changeset
|
1874 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
1875 |
g1h->set_par_threads((int)n_workers); |
1374 | 1876 |
g1h->workers()->run_task(&g1_par_note_end_task); |
1877 |
g1h->set_par_threads(0); |
|
1387 | 1878 |
|
1879 |
assert(g1h->check_heap_region_claim_values(HeapRegion::NoteEndClaimValue), |
|
1880 |
"sanity check"); |
|
1374 | 1881 |
} else { |
1882 |
g1_par_note_end_task.work(0); |
|
1883 |
} |
|
7923 | 1884 |
|
1885 |
if (!cleanup_list_is_empty()) { |
|
1886 |
// The cleanup list is not empty, so we'll have to process it |
|
1887 |
// concurrently. Notify anyone else that might be wanting free |
|
1888 |
// regions that there will be more free regions coming soon. |
|
1889 |
g1h->set_free_regions_coming(); |
|
1890 |
} |
|
1374 | 1891 |
|
1892 |
// call below, since it affects the metric by which we sort the heap |
|
1893 |
// regions. |
|
1894 |
if (G1ScrubRemSets) { |
|
1895 |
double rs_scrub_start = os::elapsedTime(); |
|
1896 |
G1ParScrubRemSetTask g1_par_scrub_rs_task(g1h, &_region_bm, &_card_bm); |
|
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
6261
diff
changeset
|
1897 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
1898 |
g1h->set_par_threads((int)n_workers); |
1374 | 1899 |
g1h->workers()->run_task(&g1_par_scrub_rs_task); |
1900 |
g1h->set_par_threads(0); |
|
1387 | 1901 |
|
1902 |
assert(g1h->check_heap_region_claim_values( |
|
1903 |
HeapRegion::ScrubRemSetClaimValue), |
|
1904 |
"sanity check"); |
|
1374 | 1905 |
} else { |
1906 |
g1_par_scrub_rs_task.work(0); |
|
1907 |
} |
|
1908 |
||
1909 |
double rs_scrub_end = os::elapsedTime(); |
|
1910 |
double this_rs_scrub_time = (rs_scrub_end - rs_scrub_start); |
|
1911 |
_total_rs_scrub_time += this_rs_scrub_time; |
|
1912 |
} |
|
1913 |
||
1914 |
// this will also free any regions totally full of garbage objects, |
|
1915 |
// and sort the regions. |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
1916 |
g1h->g1_policy()->record_concurrent_mark_cleanup_end((int)n_workers); |
1374 | 1917 |
|
1918 |
// Statistics. |
|
1919 |
double end = os::elapsedTime(); |
|
1920 |
_cleanup_times.add((end - start) * 1000.0); |
|
1921 |
||
12378
ed44b9ecfa2f
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
12272
diff
changeset
|
1922 |
if (G1Log::fine()) { |
1374 | 1923 |
g1h->print_size_transition(gclog_or_tty, |
1924 |
start_used_bytes, |
|
1925 |
g1h->used(), |
|
1926 |
g1h->capacity()); |
|
1927 |
} |
|
1928 |
||
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10668
diff
changeset
|
1929 |
// Clean up will have freed any regions completely full of garbage. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10668
diff
changeset
|
1930 |
// Update the soft reference policy with the new heap occupancy. |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10668
diff
changeset
|
1931 |
Universe::update_heap_info_at_gc(); |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10668
diff
changeset
|
1932 |
|
1374 | 1933 |
// We need to make this be a "collection" so any collection pause that |
1934 |
// races with it goes around and waits for completeCleanup to finish. |
|
1935 |
g1h->increment_total_collections(); |
|
1936 |
||
11577
0af7e6e062a7
7097586: G1: improve the per-space output when using jmap -heap
tonyp
parents:
11575
diff
changeset
|
1937 |
// We reclaimed old regions so we should calculate the sizes to make |
0af7e6e062a7
7097586: G1: improve the per-space output when using jmap -heap
tonyp
parents:
11575
diff
changeset
|
1938 |
// sure we update the old gen/space data. |
0af7e6e062a7
7097586: G1: improve the per-space output when using jmap -heap
tonyp
parents:
11575
diff
changeset
|
1939 |
g1h->g1mm()->update_sizes(); |
0af7e6e062a7
7097586: G1: improve the per-space output when using jmap -heap
tonyp
parents:
11575
diff
changeset
|
1940 |
|
2741 | 1941 |
if (VerifyDuringGC) { |
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
1942 |
HandleMark hm; // handle scope |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
1943 |
gclog_or_tty->print(" VerifyDuringGC:(after)"); |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
1944 |
Universe::heap()->prepare_for_verify(); |
12379 | 1945 |
Universe::verify(/* silent */ false, |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
1946 |
/* option */ VerifyOption_G1UsePrevMarking); |
1374 | 1947 |
} |
7923 | 1948 |
|
1949 |
g1h->verify_region_sets_optional(); |
|
1374 | 1950 |
} |
1951 |
||
1952 |
void ConcurrentMark::completeCleanup() { |
|
1953 |
if (has_aborted()) return; |
|
1954 |
||
7923 | 1955 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
1956 |
||
1957 |
_cleanup_list.verify_optional(); |
|
8680 | 1958 |
FreeRegionList tmp_free_list("Tmp Free List"); |
7923 | 1959 |
|
1960 |
if (G1ConcRegionFreeingVerbose) { |
|
1961 |
gclog_or_tty->print_cr("G1ConcRegionFreeing [complete cleanup] : " |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
1962 |
"cleanup list has %u entries", |
7923 | 1963 |
_cleanup_list.length()); |
1964 |
} |
|
1965 |
||
1966 |
// Noone else should be accessing the _cleanup_list at this point, |
|
1967 |
// so it's not necessary to take any locks |
|
1968 |
while (!_cleanup_list.is_empty()) { |
|
1969 |
HeapRegion* hr = _cleanup_list.remove_head(); |
|
1970 |
assert(hr != NULL, "the list was not empty"); |
|
9418
32a87dd6b746
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
9417
diff
changeset
|
1971 |
hr->par_clear(); |
8680 | 1972 |
tmp_free_list.add_as_tail(hr); |
7923 | 1973 |
|
1974 |
// Instead of adding one region at a time to the secondary_free_list, |
|
1975 |
// we accumulate them in the local list and move them a few at a |
|
1976 |
// time. This also cuts down on the number of notify_all() calls |
|
1977 |
// we do during this process. We'll also append the local list when |
|
1978 |
// _cleanup_list is empty (which means we just removed the last |
|
1979 |
// region from the _cleanup_list). |
|
8680 | 1980 |
if ((tmp_free_list.length() % G1SecondaryFreeListAppendLength == 0) || |
7923 | 1981 |
_cleanup_list.is_empty()) { |
1982 |
if (G1ConcRegionFreeingVerbose) { |
|
1983 |
gclog_or_tty->print_cr("G1ConcRegionFreeing [complete cleanup] : " |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
1984 |
"appending %u entries to the secondary_free_list, " |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
1985 |
"cleanup list still has %u entries", |
8680 | 1986 |
tmp_free_list.length(), |
7923 | 1987 |
_cleanup_list.length()); |
1374 | 1988 |
} |
7923 | 1989 |
|
1990 |
{ |
|
1991 |
MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
|
8680 | 1992 |
g1h->secondary_free_list_add_as_tail(&tmp_free_list); |
7923 | 1993 |
SecondaryFreeList_lock->notify_all(); |
1994 |
} |
|
1995 |
||
1996 |
if (G1StressConcRegionFreeing) { |
|
1997 |
for (uintx i = 0; i < G1StressConcRegionFreeingDelayMillis; ++i) { |
|
1998 |
os::sleep(Thread::current(), (jlong) 1, false); |
|
1999 |
} |
|
2000 |
} |
|
1374 | 2001 |
} |
2002 |
} |
|
8680 | 2003 |
assert(tmp_free_list.is_empty(), "post-condition"); |
1374 | 2004 |
} |
2005 |
||
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2006 |
// Support closures for reference procssing in G1 |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2007 |
|
7657
a80e571c3d96
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
7399
diff
changeset
|
2008 |
bool G1CMIsAliveClosure::do_object_b(oop obj) { |
a80e571c3d96
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
7399
diff
changeset
|
2009 |
HeapWord* addr = (HeapWord*)obj; |
a80e571c3d96
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
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changeset
|
2010 |
return addr != NULL && |
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parents:
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changeset
|
2011 |
(!_g1->is_in_g1_reserved(addr) || !_g1->is_obj_ill(obj)); |
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changeset
|
2012 |
} |
1374 | 2013 |
|
2014 |
class G1CMKeepAliveClosure: public OopClosure { |
|
2015 |
G1CollectedHeap* _g1; |
|
2016 |
ConcurrentMark* _cm; |
|
2017 |
public: |
|
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|
2018 |
G1CMKeepAliveClosure(G1CollectedHeap* g1, ConcurrentMark* cm) : |
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|
2019 |
_g1(g1), _cm(cm) { |
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changeset
|
2020 |
assert(Thread::current()->is_VM_thread(), "otherwise fix worker id"); |
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changeset
|
2021 |
} |
1374 | 2022 |
|
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
3184
diff
changeset
|
2023 |
virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
3184
diff
changeset
|
2024 |
virtual void do_oop( oop* p) { do_oop_work(p); } |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
2025 |
|
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
3184
diff
changeset
|
2026 |
template <class T> void do_oop_work(T* p) { |
8073
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changeset
|
2027 |
oop obj = oopDesc::load_decode_heap_oop(p); |
a14dc27842dc
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changeset
|
2028 |
HeapWord* addr = (HeapWord*)obj; |
a14dc27842dc
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changeset
|
2029 |
|
9999
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7055073: G1: code cleanup in the concurrentMark.* files
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changeset
|
2030 |
if (_cm->verbose_high()) { |
8073
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changeset
|
2031 |
gclog_or_tty->print_cr("\t[0] we're looking at location " |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
2032 |
"*"PTR_FORMAT" = "PTR_FORMAT, |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
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parents:
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diff
changeset
|
2033 |
p, (void*) obj); |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
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changeset
|
2034 |
} |
8073
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changeset
|
2035 |
|
a14dc27842dc
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changeset
|
2036 |
if (_g1->is_in_g1_reserved(addr) && _g1->is_obj_ill(obj)) { |
11583
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changeset
|
2037 |
_cm->mark_and_count(obj); |
8073
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changeset
|
2038 |
_cm->mark_stack_push(obj); |
1374 | 2039 |
} |
2040 |
} |
|
2041 |
}; |
|
2042 |
||
2043 |
class G1CMDrainMarkingStackClosure: public VoidClosure { |
|
11583
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changeset
|
2044 |
ConcurrentMark* _cm; |
1374 | 2045 |
CMMarkStack* _markStack; |
2046 |
G1CMKeepAliveClosure* _oopClosure; |
|
2047 |
public: |
|
11583
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changeset
|
2048 |
G1CMDrainMarkingStackClosure(ConcurrentMark* cm, CMMarkStack* markStack, |
1374 | 2049 |
G1CMKeepAliveClosure* oopClosure) : |
11583
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changeset
|
2050 |
_cm(cm), |
1374 | 2051 |
_markStack(markStack), |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
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changeset
|
2052 |
_oopClosure(oopClosure) { } |
1374 | 2053 |
|
2054 |
void do_void() { |
|
11583
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changeset
|
2055 |
_markStack->drain((OopClosure*)_oopClosure, _cm->nextMarkBitMap(), false); |
1374 | 2056 |
} |
2057 |
}; |
|
2058 |
||
8073
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|
2059 |
// 'Keep Alive' closure used by parallel reference processing. |
a14dc27842dc
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changeset
|
2060 |
// An instance of this closure is used in the parallel reference processing |
a14dc27842dc
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changeset
|
2061 |
// code rather than an instance of G1CMKeepAliveClosure. We could have used |
a14dc27842dc
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parents:
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changeset
|
2062 |
// the G1CMKeepAliveClosure as it is MT-safe. Also reference objects are |
a14dc27842dc
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parents:
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changeset
|
2063 |
// placed on to discovered ref lists once so we can mark and push with no |
a14dc27842dc
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parents:
7923
diff
changeset
|
2064 |
// need to check whether the object has already been marked. Using the |
a14dc27842dc
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parents:
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changeset
|
2065 |
// G1CMKeepAliveClosure would mean, however, having all the worker threads |
a14dc27842dc
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parents:
7923
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changeset
|
2066 |
// operating on the global mark stack. This means that an individual |
a14dc27842dc
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parents:
7923
diff
changeset
|
2067 |
// worker would be doing lock-free pushes while it processes its own |
a14dc27842dc
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parents:
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changeset
|
2068 |
// discovered ref list followed by drain call. If the discovered ref lists |
a14dc27842dc
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changeset
|
2069 |
// are unbalanced then this could cause interference with the other |
a14dc27842dc
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changeset
|
2070 |
// workers. Using a CMTask (and its embedded local data structures) |
a14dc27842dc
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parents:
7923
diff
changeset
|
2071 |
// avoids that potential interference. |
a14dc27842dc
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parents:
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changeset
|
2072 |
class G1CMParKeepAliveAndDrainClosure: public OopClosure { |
a14dc27842dc
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parents:
7923
diff
changeset
|
2073 |
ConcurrentMark* _cm; |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2074 |
CMTask* _task; |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2075 |
int _ref_counter_limit; |
a14dc27842dc
6608385: G1: need to support parallel reference processing
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parents:
7923
diff
changeset
|
2076 |
int _ref_counter; |
a14dc27842dc
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parents:
7923
diff
changeset
|
2077 |
public: |
11172
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
2078 |
G1CMParKeepAliveAndDrainClosure(ConcurrentMark* cm, CMTask* task) : |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
2079 |
_cm(cm), _task(task), |
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
2080 |
_ref_counter_limit(G1RefProcDrainInterval) { |
8073
a14dc27842dc
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changeset
|
2081 |
assert(_ref_counter_limit > 0, "sanity"); |
a14dc27842dc
6608385: G1: need to support parallel reference processing
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parents:
7923
diff
changeset
|
2082 |
_ref_counter = _ref_counter_limit; |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2083 |
} |
a14dc27842dc
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johnc
parents:
7923
diff
changeset
|
2084 |
|
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2085 |
virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2086 |
virtual void do_oop( oop* p) { do_oop_work(p); } |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2087 |
|
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2088 |
template <class T> void do_oop_work(T* p) { |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2089 |
if (!_cm->has_overflown()) { |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2090 |
oop obj = oopDesc::load_decode_heap_oop(p); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
2091 |
if (_cm->verbose_high()) { |
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2092 |
gclog_or_tty->print_cr("\t[%d] we're looking at location " |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2093 |
"*"PTR_FORMAT" = "PTR_FORMAT, |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2094 |
_task->task_id(), p, (void*) obj); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
2095 |
} |
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2096 |
|
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2097 |
_task->deal_with_reference(obj); |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2098 |
_ref_counter--; |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2099 |
|
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2100 |
if (_ref_counter == 0) { |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2101 |
// We have dealt with _ref_counter_limit references, pushing them and objects |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2102 |
// reachable from them on to the local stack (and possibly the global stack). |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2103 |
// Call do_marking_step() to process these entries. We call the routine in a |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2104 |
// loop, which we'll exit if there's nothing more to do (i.e. we're done |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2105 |
// with the entries that we've pushed as a result of the deal_with_reference |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2106 |
// calls above) or we overflow. |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2107 |
// Note: CMTask::do_marking_step() can set the CMTask::has_aborted() flag |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2108 |
// while there may still be some work to do. (See the comment at the |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2109 |
// beginning of CMTask::do_marking_step() for those conditions - one of which |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2110 |
// is reaching the specified time target.) It is only when |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2111 |
// CMTask::do_marking_step() returns without setting the has_aborted() flag |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2112 |
// that the marking has completed. |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2113 |
do { |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2114 |
double mark_step_duration_ms = G1ConcMarkStepDurationMillis; |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2115 |
_task->do_marking_step(mark_step_duration_ms, |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2116 |
false /* do_stealing */, |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2117 |
false /* do_termination */); |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2118 |
} while (_task->has_aborted() && !_cm->has_overflown()); |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2119 |
_ref_counter = _ref_counter_limit; |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2120 |
} |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2121 |
} else { |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
2122 |
if (_cm->verbose_high()) { |
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2123 |
gclog_or_tty->print_cr("\t[%d] CM Overflow", _task->task_id()); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
2124 |
} |
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2125 |
} |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2126 |
} |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2127 |
}; |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2128 |
|
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2129 |
class G1CMParDrainMarkingStackClosure: public VoidClosure { |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2130 |
ConcurrentMark* _cm; |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2131 |
CMTask* _task; |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2132 |
public: |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2133 |
G1CMParDrainMarkingStackClosure(ConcurrentMark* cm, CMTask* task) : |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2134 |
_cm(cm), _task(task) { } |
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2135 |
|
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2136 |
void do_void() { |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2137 |
do { |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
2138 |
if (_cm->verbose_high()) { |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
2139 |
gclog_or_tty->print_cr("\t[%d] Drain: Calling do marking_step", |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
2140 |
_task->task_id()); |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
2141 |
} |
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2142 |
|
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2143 |
// We call CMTask::do_marking_step() to completely drain the local and |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2144 |
// global marking stacks. The routine is called in a loop, which we'll |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2145 |
// exit if there's nothing more to do (i.e. we'completely drained the |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2146 |
// entries that were pushed as a result of applying the |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
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|
2147 |
// G1CMParKeepAliveAndDrainClosure to the entries on the discovered ref |
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|
2148 |
// lists above) or we overflow the global marking stack. |
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|
2149 |
// Note: CMTask::do_marking_step() can set the CMTask::has_aborted() flag |
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|
2150 |
// while there may still be some work to do. (See the comment at the |
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|
2151 |
// beginning of CMTask::do_marking_step() for those conditions - one of which |
a14dc27842dc
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|
2152 |
// is reaching the specified time target.) It is only when |
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|
2153 |
// CMTask::do_marking_step() returns without setting the has_aborted() flag |
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|
2154 |
// that the marking has completed. |
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changeset
|
2155 |
|
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|
2156 |
_task->do_marking_step(1000000000.0 /* something very large */, |
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|
2157 |
true /* do_stealing */, |
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|
2158 |
true /* do_termination */); |
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changeset
|
2159 |
} while (_task->has_aborted() && !_cm->has_overflown()); |
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changeset
|
2160 |
} |
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changeset
|
2161 |
}; |
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|
2162 |
|
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|
2163 |
// Implementation of AbstractRefProcTaskExecutor for parallel |
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|
2164 |
// reference processing at the end of G1 concurrent marking |
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changeset
|
2165 |
|
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|
2166 |
class G1CMRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
8073
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|
2167 |
private: |
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|
2168 |
G1CollectedHeap* _g1h; |
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|
2169 |
ConcurrentMark* _cm; |
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|
2170 |
WorkGang* _workers; |
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|
2171 |
int _active_workers; |
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changeset
|
2172 |
|
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|
2173 |
public: |
10670
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|
2174 |
G1CMRefProcTaskExecutor(G1CollectedHeap* g1h, |
8073
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|
2175 |
ConcurrentMark* cm, |
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changeset
|
2176 |
WorkGang* workers, |
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changeset
|
2177 |
int n_workers) : |
11172
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changeset
|
2178 |
_g1h(g1h), _cm(cm), |
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|
2179 |
_workers(workers), _active_workers(n_workers) { } |
8073
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changeset
|
2180 |
|
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changeset
|
2181 |
// Executes the given task using concurrent marking worker threads. |
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|
2182 |
virtual void execute(ProcessTask& task); |
a14dc27842dc
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parents:
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diff
changeset
|
2183 |
virtual void execute(EnqueueTask& task); |
a14dc27842dc
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parents:
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diff
changeset
|
2184 |
}; |
a14dc27842dc
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diff
changeset
|
2185 |
|
10670
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changeset
|
2186 |
class G1CMRefProcTaskProxy: public AbstractGangTask { |
8073
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changeset
|
2187 |
typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
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changeset
|
2188 |
ProcessTask& _proc_task; |
a14dc27842dc
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parents:
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changeset
|
2189 |
G1CollectedHeap* _g1h; |
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changeset
|
2190 |
ConcurrentMark* _cm; |
a14dc27842dc
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parents:
7923
diff
changeset
|
2191 |
|
a14dc27842dc
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parents:
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changeset
|
2192 |
public: |
10670
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changeset
|
2193 |
G1CMRefProcTaskProxy(ProcessTask& proc_task, |
8073
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changeset
|
2194 |
G1CollectedHeap* g1h, |
11172
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changeset
|
2195 |
ConcurrentMark* cm) : |
8073
a14dc27842dc
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changeset
|
2196 |
AbstractGangTask("Process reference objects in parallel"), |
11172
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changeset
|
2197 |
_proc_task(proc_task), _g1h(g1h), _cm(cm) { } |
8073
a14dc27842dc
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changeset
|
2198 |
|
11396
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7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
2199 |
virtual void work(uint worker_id) { |
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
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changeset
|
2200 |
CMTask* marking_task = _cm->task(worker_id); |
8073
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changeset
|
2201 |
G1CMIsAliveClosure g1_is_alive(_g1h); |
11172
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changeset
|
2202 |
G1CMParKeepAliveAndDrainClosure g1_par_keep_alive(_cm, marking_task); |
8073
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changeset
|
2203 |
G1CMParDrainMarkingStackClosure g1_par_drain(_cm, marking_task); |
a14dc27842dc
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changeset
|
2204 |
|
11396
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7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
2205 |
_proc_task.work(worker_id, g1_is_alive, g1_par_keep_alive, g1_par_drain); |
8073
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changeset
|
2206 |
} |
a14dc27842dc
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parents:
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diff
changeset
|
2207 |
}; |
a14dc27842dc
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diff
changeset
|
2208 |
|
10670
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diff
changeset
|
2209 |
void G1CMRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
8073
a14dc27842dc
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changeset
|
2210 |
assert(_workers != NULL, "Need parallel worker threads."); |
a14dc27842dc
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parents:
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changeset
|
2211 |
|
11172
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parents:
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diff
changeset
|
2212 |
G1CMRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _cm); |
8073
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changeset
|
2213 |
|
a14dc27842dc
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parents:
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diff
changeset
|
2214 |
// We need to reset the phase for each task execution so that |
a14dc27842dc
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johnc
parents:
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changeset
|
2215 |
// the termination protocol of CMTask::do_marking_step works. |
a14dc27842dc
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changeset
|
2216 |
_cm->set_phase(_active_workers, false /* concurrent */); |
a14dc27842dc
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parents:
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changeset
|
2217 |
_g1h->set_par_threads(_active_workers); |
a14dc27842dc
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parents:
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changeset
|
2218 |
_workers->run_task(&proc_task_proxy); |
a14dc27842dc
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parents:
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changeset
|
2219 |
_g1h->set_par_threads(0); |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2220 |
} |
a14dc27842dc
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johnc
parents:
7923
diff
changeset
|
2221 |
|
10670
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johnc
parents:
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diff
changeset
|
2222 |
class G1CMRefEnqueueTaskProxy: public AbstractGangTask { |
8073
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changeset
|
2223 |
typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
a14dc27842dc
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johnc
parents:
7923
diff
changeset
|
2224 |
EnqueueTask& _enq_task; |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2225 |
|
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2226 |
public: |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10668
diff
changeset
|
2227 |
G1CMRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
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changeset
|
2228 |
AbstractGangTask("Enqueue reference objects in parallel"), |
11172
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7111795: G1: Various cleanups identified during walk through of changes for 6484965
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parents:
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diff
changeset
|
2229 |
_enq_task(enq_task) { } |
8073
a14dc27842dc
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parents:
7923
diff
changeset
|
2230 |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
2231 |
virtual void work(uint worker_id) { |
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
2232 |
_enq_task.work(worker_id); |
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2233 |
} |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2234 |
}; |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2235 |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
2236 |
void G1CMRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
8073
a14dc27842dc
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parents:
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changeset
|
2237 |
assert(_workers != NULL, "Need parallel worker threads."); |
a14dc27842dc
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johnc
parents:
7923
diff
changeset
|
2238 |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10668
diff
changeset
|
2239 |
G1CMRefEnqueueTaskProxy enq_task_proxy(enq_task); |
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2240 |
|
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2241 |
_g1h->set_par_threads(_active_workers); |
a14dc27842dc
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parents:
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diff
changeset
|
2242 |
_workers->run_task(&enq_task_proxy); |
a14dc27842dc
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parents:
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diff
changeset
|
2243 |
_g1h->set_par_threads(0); |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
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diff
changeset
|
2244 |
} |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2245 |
|
1374 | 2246 |
void ConcurrentMark::weakRefsWork(bool clear_all_soft_refs) { |
2247 |
ResourceMark rm; |
|
2248 |
HandleMark hm; |
|
10666
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2249 |
|
1fd33ec0e5f7
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johnc
parents:
10523
diff
changeset
|
2250 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2251 |
|
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2252 |
// Is alive closure. |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2253 |
G1CMIsAliveClosure g1_is_alive(g1h); |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2254 |
|
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2255 |
// Inner scope to exclude the cleaning of the string and symbol |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2256 |
// tables from the displayed time. |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2257 |
{ |
12378
ed44b9ecfa2f
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
12272
diff
changeset
|
2258 |
if (G1Log::finer()) { |
10666
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2259 |
gclog_or_tty->put(' '); |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2260 |
} |
12378
ed44b9ecfa2f
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
12272
diff
changeset
|
2261 |
TraceTime t("GC ref-proc", G1Log::finer(), false, gclog_or_tty); |
10666
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2262 |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10668
diff
changeset
|
2263 |
ReferenceProcessor* rp = g1h->ref_processor_cm(); |
10666
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2264 |
|
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2265 |
// See the comment in G1CollectedHeap::ref_processing_init() |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
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diff
changeset
|
2266 |
// about how reference processing currently works in G1. |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2267 |
|
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2268 |
// Process weak references. |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2269 |
rp->setup_policy(clear_all_soft_refs); |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2270 |
assert(_markStack.isEmpty(), "mark stack should be empty"); |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2271 |
|
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2272 |
G1CMKeepAliveClosure g1_keep_alive(g1h, this); |
10666
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
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diff
changeset
|
2273 |
G1CMDrainMarkingStackClosure |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2274 |
g1_drain_mark_stack(this, &_markStack, &g1_keep_alive); |
10666
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2275 |
|
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2276 |
// We use the work gang from the G1CollectedHeap and we utilize all |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2277 |
// the worker threads. |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
2278 |
uint active_workers = g1h->workers() ? g1h->workers()->active_workers() : 1U; |
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
2279 |
active_workers = MAX2(MIN2(active_workers, _max_task_num), 1U); |
10666
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2280 |
|
11172
f720721985ba
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
10996
diff
changeset
|
2281 |
G1CMRefProcTaskExecutor par_task_executor(g1h, this, |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10668
diff
changeset
|
2282 |
g1h->workers(), active_workers); |
10666
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2283 |
|
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2284 |
if (rp->processing_is_mt()) { |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2285 |
// Set the degree of MT here. If the discovery is done MT, there |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2286 |
// may have been a different number of threads doing the discovery |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2287 |
// and a different number of discovered lists may have Ref objects. |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2288 |
// That is OK as long as the Reference lists are balanced (see |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2289 |
// balance_all_queues() and balance_queues()). |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2290 |
rp->set_active_mt_degree(active_workers); |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2291 |
|
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2292 |
rp->process_discovered_references(&g1_is_alive, |
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2293 |
&g1_keep_alive, |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2294 |
&g1_drain_mark_stack, |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2295 |
&par_task_executor); |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2296 |
|
10666
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2297 |
// The work routines of the parallel keep_alive and drain_marking_stack |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2298 |
// will set the has_overflown flag if we overflow the global marking |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2299 |
// stack. |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2300 |
} else { |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2301 |
rp->process_discovered_references(&g1_is_alive, |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2302 |
&g1_keep_alive, |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2303 |
&g1_drain_mark_stack, |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2304 |
NULL); |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2305 |
} |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2306 |
|
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2307 |
assert(_markStack.overflow() || _markStack.isEmpty(), |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2308 |
"mark stack should be empty (unless it overflowed)"); |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2309 |
if (_markStack.overflow()) { |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2310 |
// Should have been done already when we tried to push an |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2311 |
// entry on to the global mark stack. But let's do it again. |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2312 |
set_has_overflown(); |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2313 |
} |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2314 |
|
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2315 |
if (rp->processing_is_mt()) { |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2316 |
assert(rp->num_q() == active_workers, "why not"); |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2317 |
rp->enqueue_discovered_references(&par_task_executor); |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2318 |
} else { |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2319 |
rp->enqueue_discovered_references(); |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2320 |
} |
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2321 |
|
1fd33ec0e5f7
7068215: G1: Print reference processing time during remark
johnc
parents:
10523
diff
changeset
|
2322 |
rp->verify_no_references_recorded(); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10668
diff
changeset
|
2323 |
assert(!rp->discovery_enabled(), "Post condition"); |
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2324 |
} |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2325 |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8074
diff
changeset
|
2326 |
// Now clean up stale oops in StringTable |
7657
a80e571c3d96
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
7399
diff
changeset
|
2327 |
StringTable::unlink(&g1_is_alive); |
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8074
diff
changeset
|
2328 |
// Clean up unreferenced symbols in symbol table. |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8074
diff
changeset
|
2329 |
SymbolTable::unlink(); |
1374 | 2330 |
} |
2331 |
||
2332 |
void ConcurrentMark::swapMarkBitMaps() { |
|
2333 |
CMBitMapRO* temp = _prevMarkBitMap; |
|
2334 |
_prevMarkBitMap = (CMBitMapRO*)_nextMarkBitMap; |
|
2335 |
_nextMarkBitMap = (CMBitMap*) temp; |
|
2336 |
} |
|
2337 |
||
2338 |
class CMRemarkTask: public AbstractGangTask { |
|
2339 |
private: |
|
2340 |
ConcurrentMark *_cm; |
|
2341 |
||
2342 |
public: |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
2343 |
void work(uint worker_id) { |
1374 | 2344 |
// Since all available tasks are actually started, we should |
2345 |
// only proceed if we're supposed to be actived. |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
2346 |
if (worker_id < _cm->active_tasks()) { |
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
2347 |
CMTask* task = _cm->task(worker_id); |
1374 | 2348 |
task->record_start_time(); |
2349 |
do { |
|
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2350 |
task->do_marking_step(1000000000.0 /* something very large */, |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2351 |
true /* do_stealing */, |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2352 |
true /* do_termination */); |
1374 | 2353 |
} while (task->has_aborted() && !_cm->has_overflown()); |
2354 |
// If we overflow, then we do not want to restart. We instead |
|
2355 |
// want to abort remark and do concurrent marking again. |
|
2356 |
task->record_end_time(); |
|
2357 |
} |
|
2358 |
} |
|
2359 |
||
11250 | 2360 |
CMRemarkTask(ConcurrentMark* cm, int active_workers) : |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
2361 |
AbstractGangTask("Par Remark"), _cm(cm) { |
11250 | 2362 |
_cm->terminator()->reset_for_reuse(active_workers); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
2363 |
} |
1374 | 2364 |
}; |
2365 |
||
2366 |
void ConcurrentMark::checkpointRootsFinalWork() { |
|
2367 |
ResourceMark rm; |
|
2368 |
HandleMark hm; |
|
2369 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
2370 |
||
2371 |
g1h->ensure_parsability(false); |
|
2372 |
||
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
6261
diff
changeset
|
2373 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3612
diff
changeset
|
2374 |
G1CollectedHeap::StrongRootsScope srs(g1h); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
2375 |
// this is remark, so we'll use up all active threads |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
2376 |
uint active_workers = g1h->workers()->active_workers(); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
2377 |
if (active_workers == 0) { |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
2378 |
assert(active_workers > 0, "Should have been set earlier"); |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
2379 |
active_workers = (uint) ParallelGCThreads; |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
2380 |
g1h->workers()->set_active_workers(active_workers); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
2381 |
} |
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2382 |
set_phase(active_workers, false /* concurrent */); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
2383 |
// Leave _parallel_marking_threads at it's |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
2384 |
// value originally calculated in the ConcurrentMark |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
2385 |
// constructor and pass values of the active workers |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
2386 |
// through the gang in the task. |
1374 | 2387 |
|
11250 | 2388 |
CMRemarkTask remarkTask(this, active_workers); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
11172
diff
changeset
|
2389 |
g1h->set_par_threads(active_workers); |
1374 | 2390 |
g1h->workers()->run_task(&remarkTask); |
2391 |
g1h->set_par_threads(0); |
|
2392 |
} else { |
|
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3612
diff
changeset
|
2393 |
G1CollectedHeap::StrongRootsScope srs(g1h); |
1374 | 2394 |
// this is remark, so we'll use up all available threads |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
2395 |
uint active_workers = 1; |
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
2396 |
set_phase(active_workers, false /* concurrent */); |
1374 | 2397 |
|
11250 | 2398 |
CMRemarkTask remarkTask(this, active_workers); |
1374 | 2399 |
// We will start all available threads, even if we decide that the |
2400 |
// active_workers will be fewer. The extra ones will just bail out |
|
2401 |
// immediately. |
|
2402 |
remarkTask.work(0); |
|
2403 |
} |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
2404 |
SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
2405 |
guarantee(satb_mq_set.completed_buffers_num() == 0, "invariant"); |
1374 | 2406 |
|
2407 |
print_stats(); |
|
2408 |
||
2409 |
#if VERIFY_OBJS_PROCESSED |
|
2410 |
if (_scan_obj_cl.objs_processed != ThreadLocalObjQueue::objs_enqueued) { |
|
2411 |
gclog_or_tty->print_cr("Processed = %d, enqueued = %d.", |
|
2412 |
_scan_obj_cl.objs_processed, |
|
2413 |
ThreadLocalObjQueue::objs_enqueued); |
|
2414 |
guarantee(_scan_obj_cl.objs_processed == |
|
2415 |
ThreadLocalObjQueue::objs_enqueued, |
|
2416 |
"Different number of objs processed and enqueued."); |
|
2417 |
} |
|
2418 |
#endif |
|
2419 |
} |
|
2420 |
||
4099 | 2421 |
#ifndef PRODUCT |
2422 |
||
5344 | 2423 |
class PrintReachableOopClosure: public OopClosure { |
1374 | 2424 |
private: |
2425 |
G1CollectedHeap* _g1h; |
|
2426 |
outputStream* _out; |
|
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2427 |
VerifyOption _vo; |
5344 | 2428 |
bool _all; |
1374 | 2429 |
|
2430 |
public: |
|
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2431 |
PrintReachableOopClosure(outputStream* out, |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2432 |
VerifyOption vo, |
5344 | 2433 |
bool all) : |
4099 | 2434 |
_g1h(G1CollectedHeap::heap()), |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2435 |
_out(out), _vo(vo), _all(all) { } |
1374 | 2436 |
|
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
2437 |
void do_oop(narrowOop* p) { do_oop_work(p); } |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
2438 |
void do_oop( oop* p) { do_oop_work(p); } |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
2439 |
|
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
2440 |
template <class T> void do_oop_work(T* p) { |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
3184
diff
changeset
|
2441 |
oop obj = oopDesc::load_decode_heap_oop(p); |
1374 | 2442 |
const char* str = NULL; |
2443 |
const char* str2 = ""; |
|
2444 |
||
5344 | 2445 |
if (obj == NULL) { |
2446 |
str = ""; |
|
2447 |
} else if (!_g1h->is_in_g1_reserved(obj)) { |
|
2448 |
str = " O"; |
|
2449 |
} else { |
|
1374 | 2450 |
HeapRegion* hr = _g1h->heap_region_containing(obj); |
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
2451 |
guarantee(hr != NULL, "invariant"); |
4099 | 2452 |
bool over_tams = false; |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2453 |
bool marked = false; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2454 |
|
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2455 |
switch (_vo) { |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2456 |
case VerifyOption_G1UsePrevMarking: |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2457 |
over_tams = hr->obj_allocated_since_prev_marking(obj); |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2458 |
marked = _g1h->isMarkedPrev(obj); |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2459 |
break; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2460 |
case VerifyOption_G1UseNextMarking: |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2461 |
over_tams = hr->obj_allocated_since_next_marking(obj); |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2462 |
marked = _g1h->isMarkedNext(obj); |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2463 |
break; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2464 |
case VerifyOption_G1UseMarkWord: |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2465 |
marked = obj->is_gc_marked(); |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2466 |
break; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2467 |
default: |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2468 |
ShouldNotReachHere(); |
4099 | 2469 |
} |
2470 |
||
2471 |
if (over_tams) { |
|
5344 | 2472 |
str = " >"; |
2473 |
if (marked) { |
|
1374 | 2474 |
str2 = " AND MARKED"; |
4099 | 2475 |
} |
5344 | 2476 |
} else if (marked) { |
2477 |
str = " M"; |
|
4099 | 2478 |
} else { |
5344 | 2479 |
str = " NOT"; |
4099 | 2480 |
} |
1374 | 2481 |
} |
2482 |
||
5344 | 2483 |
_out->print_cr(" "PTR_FORMAT": "PTR_FORMAT"%s%s", |
1374 | 2484 |
p, (void*) obj, str, str2); |
2485 |
} |
|
2486 |
}; |
|
2487 |
||
5344 | 2488 |
class PrintReachableObjectClosure : public ObjectClosure { |
1374 | 2489 |
private: |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2490 |
G1CollectedHeap* _g1h; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2491 |
outputStream* _out; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2492 |
VerifyOption _vo; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2493 |
bool _all; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2494 |
HeapRegion* _hr; |
1374 | 2495 |
|
2496 |
public: |
|
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2497 |
PrintReachableObjectClosure(outputStream* out, |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2498 |
VerifyOption vo, |
5344 | 2499 |
bool all, |
2500 |
HeapRegion* hr) : |
|
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2501 |
_g1h(G1CollectedHeap::heap()), |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2502 |
_out(out), _vo(vo), _all(all), _hr(hr) { } |
5344 | 2503 |
|
2504 |
void do_object(oop o) { |
|
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2505 |
bool over_tams = false; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2506 |
bool marked = false; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2507 |
|
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2508 |
switch (_vo) { |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2509 |
case VerifyOption_G1UsePrevMarking: |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2510 |
over_tams = _hr->obj_allocated_since_prev_marking(o); |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2511 |
marked = _g1h->isMarkedPrev(o); |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2512 |
break; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2513 |
case VerifyOption_G1UseNextMarking: |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2514 |
over_tams = _hr->obj_allocated_since_next_marking(o); |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2515 |
marked = _g1h->isMarkedNext(o); |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2516 |
break; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2517 |
case VerifyOption_G1UseMarkWord: |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2518 |
marked = o->is_gc_marked(); |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2519 |
break; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2520 |
default: |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2521 |
ShouldNotReachHere(); |
5344 | 2522 |
} |
2523 |
bool print_it = _all || over_tams || marked; |
|
2524 |
||
2525 |
if (print_it) { |
|
2526 |
_out->print_cr(" "PTR_FORMAT"%s", |
|
2527 |
o, (over_tams) ? " >" : (marked) ? " M" : ""); |
|
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2528 |
PrintReachableOopClosure oopCl(_out, _vo, _all); |
5344 | 2529 |
o->oop_iterate(&oopCl); |
2530 |
} |
|
1374 | 2531 |
} |
2532 |
}; |
|
2533 |
||
5344 | 2534 |
class PrintReachableRegionClosure : public HeapRegionClosure { |
1374 | 2535 |
private: |
2536 |
outputStream* _out; |
|
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2537 |
VerifyOption _vo; |
5344 | 2538 |
bool _all; |
1374 | 2539 |
|
2540 |
public: |
|
2541 |
bool doHeapRegion(HeapRegion* hr) { |
|
2542 |
HeapWord* b = hr->bottom(); |
|
2543 |
HeapWord* e = hr->end(); |
|
2544 |
HeapWord* t = hr->top(); |
|
4099 | 2545 |
HeapWord* p = NULL; |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2546 |
|
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2547 |
switch (_vo) { |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2548 |
case VerifyOption_G1UsePrevMarking: |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2549 |
p = hr->prev_top_at_mark_start(); |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2550 |
break; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2551 |
case VerifyOption_G1UseNextMarking: |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2552 |
p = hr->next_top_at_mark_start(); |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2553 |
break; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2554 |
case VerifyOption_G1UseMarkWord: |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2555 |
// When we are verifying marking using the mark word |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2556 |
// TAMS has no relevance. |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2557 |
assert(p == NULL, "post-condition"); |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2558 |
break; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2559 |
default: |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2560 |
ShouldNotReachHere(); |
4099 | 2561 |
} |
1374 | 2562 |
_out->print_cr("** ["PTR_FORMAT", "PTR_FORMAT"] top: "PTR_FORMAT" " |
4099 | 2563 |
"TAMS: "PTR_FORMAT, b, e, t, p); |
5344 | 2564 |
_out->cr(); |
2565 |
||
2566 |
HeapWord* from = b; |
|
2567 |
HeapWord* to = t; |
|
2568 |
||
2569 |
if (to > from) { |
|
2570 |
_out->print_cr("Objects in ["PTR_FORMAT", "PTR_FORMAT"]", from, to); |
|
2571 |
_out->cr(); |
|
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2572 |
PrintReachableObjectClosure ocl(_out, _vo, _all, hr); |
5344 | 2573 |
hr->object_iterate_mem_careful(MemRegion(from, to), &ocl); |
2574 |
_out->cr(); |
|
2575 |
} |
|
1374 | 2576 |
|
2577 |
return false; |
|
2578 |
} |
|
2579 |
||
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2580 |
PrintReachableRegionClosure(outputStream* out, |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2581 |
VerifyOption vo, |
5344 | 2582 |
bool all) : |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2583 |
_out(out), _vo(vo), _all(all) { } |
1374 | 2584 |
}; |
2585 |
||
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2586 |
static const char* verify_option_to_tams(VerifyOption vo) { |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2587 |
switch (vo) { |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2588 |
case VerifyOption_G1UsePrevMarking: |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2589 |
return "PTAMS"; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2590 |
case VerifyOption_G1UseNextMarking: |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2591 |
return "NTAMS"; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2592 |
default: |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2593 |
return "NONE"; |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2594 |
} |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2595 |
} |
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2596 |
|
5344 | 2597 |
void ConcurrentMark::print_reachable(const char* str, |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2598 |
VerifyOption vo, |
5344 | 2599 |
bool all) { |
2600 |
gclog_or_tty->cr(); |
|
2601 |
gclog_or_tty->print_cr("== Doing heap dump... "); |
|
4099 | 2602 |
|
2603 |
if (G1PrintReachableBaseFile == NULL) { |
|
2604 |
gclog_or_tty->print_cr(" #### error: no base file defined"); |
|
2605 |
return; |
|
2606 |
} |
|
2607 |
||
2608 |
if (strlen(G1PrintReachableBaseFile) + 1 + strlen(str) > |
|
2609 |
(JVM_MAXPATHLEN - 1)) { |
|
2610 |
gclog_or_tty->print_cr(" #### error: file name too long"); |
|
2611 |
return; |
|
2612 |
} |
|
2613 |
||
2614 |
char file_name[JVM_MAXPATHLEN]; |
|
2615 |
sprintf(file_name, "%s.%s", G1PrintReachableBaseFile, str); |
|
2616 |
gclog_or_tty->print_cr(" dumping to file %s", file_name); |
|
2617 |
||
2618 |
fileStream fout(file_name); |
|
2619 |
if (!fout.is_open()) { |
|
2620 |
gclog_or_tty->print_cr(" #### error: could not open file"); |
|
2621 |
return; |
|
2622 |
} |
|
2623 |
||
2624 |
outputStream* out = &fout; |
|
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2625 |
out->print_cr("-- USING %s", verify_option_to_tams(vo)); |
4099 | 2626 |
out->cr(); |
2627 |
||
5344 | 2628 |
out->print_cr("--- ITERATING OVER REGIONS"); |
4099 | 2629 |
out->cr(); |
9995
290620c08233
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
9994
diff
changeset
|
2630 |
PrintReachableRegionClosure rcl(out, vo, all); |
5344 | 2631 |
_g1h->heap_region_iterate(&rcl); |
4099 | 2632 |
out->cr(); |
2633 |
||
2634 |
gclog_or_tty->print_cr(" done"); |
|
5344 | 2635 |
gclog_or_tty->flush(); |
1374 | 2636 |
} |
2637 |
||
4099 | 2638 |
#endif // PRODUCT |
2639 |
||
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2640 |
void ConcurrentMark::clearRangePrevBitmap(MemRegion mr) { |
1374 | 2641 |
// Note we are overriding the read-only view of the prev map here, via |
2642 |
// the cast. |
|
2643 |
((CMBitMap*)_prevMarkBitMap)->clearRange(mr); |
|
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2644 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2645 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2646 |
void ConcurrentMark::clearRangeNextBitmap(MemRegion mr) { |
1374 | 2647 |
_nextMarkBitMap->clearRange(mr); |
2648 |
} |
|
2649 |
||
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2650 |
void ConcurrentMark::clearRangeBothBitmaps(MemRegion mr) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2651 |
clearRangePrevBitmap(mr); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2652 |
clearRangeNextBitmap(mr); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2653 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2654 |
|
1374 | 2655 |
HeapRegion* |
2656 |
ConcurrentMark::claim_region(int task_num) { |
|
2657 |
// "checkpoint" the finger |
|
2658 |
HeapWord* finger = _finger; |
|
2659 |
||
2660 |
// _heap_end will not change underneath our feet; it only changes at |
|
2661 |
// yield points. |
|
2662 |
while (finger < _heap_end) { |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
2663 |
assert(_g1h->is_in_g1_reserved(finger), "invariant"); |
1374 | 2664 |
|
9994 | 2665 |
// Note on how this code handles humongous regions. In the |
2666 |
// normal case the finger will reach the start of a "starts |
|
2667 |
// humongous" (SH) region. Its end will either be the end of the |
|
2668 |
// last "continues humongous" (CH) region in the sequence, or the |
|
2669 |
// standard end of the SH region (if the SH is the only region in |
|
2670 |
// the sequence). That way claim_region() will skip over the CH |
|
2671 |
// regions. However, there is a subtle race between a CM thread |
|
2672 |
// executing this method and a mutator thread doing a humongous |
|
2673 |
// object allocation. The two are not mutually exclusive as the CM |
|
2674 |
// thread does not need to hold the Heap_lock when it gets |
|
2675 |
// here. So there is a chance that claim_region() will come across |
|
2676 |
// a free region that's in the progress of becoming a SH or a CH |
|
2677 |
// region. In the former case, it will either |
|
2678 |
// a) Miss the update to the region's end, in which case it will |
|
2679 |
// visit every subsequent CH region, will find their bitmaps |
|
2680 |
// empty, and do nothing, or |
|
2681 |
// b) Will observe the update of the region's end (in which case |
|
2682 |
// it will skip the subsequent CH regions). |
|
2683 |
// If it comes across a region that suddenly becomes CH, the |
|
2684 |
// scenario will be similar to b). So, the race between |
|
2685 |
// claim_region() and a humongous object allocation might force us |
|
2686 |
// to do a bit of unnecessary work (due to some unnecessary bitmap |
|
2687 |
// iterations) but it should not introduce and correctness issues. |
|
2688 |
HeapRegion* curr_region = _g1h->heap_region_containing_raw(finger); |
|
1374 | 2689 |
HeapWord* bottom = curr_region->bottom(); |
2690 |
HeapWord* end = curr_region->end(); |
|
2691 |
HeapWord* limit = curr_region->next_top_at_mark_start(); |
|
2692 |
||
9994 | 2693 |
if (verbose_low()) { |
1374 | 2694 |
gclog_or_tty->print_cr("[%d] curr_region = "PTR_FORMAT" " |
2695 |
"["PTR_FORMAT", "PTR_FORMAT"), " |
|
2696 |
"limit = "PTR_FORMAT, |
|
2697 |
task_num, curr_region, bottom, end, limit); |
|
9994 | 2698 |
} |
2699 |
||
2700 |
// Is the gap between reading the finger and doing the CAS too long? |
|
2701 |
HeapWord* res = (HeapWord*) Atomic::cmpxchg_ptr(end, &_finger, finger); |
|
1374 | 2702 |
if (res == finger) { |
2703 |
// we succeeded |
|
2704 |
||
2705 |
// notice that _finger == end cannot be guaranteed here since, |
|
2706 |
// someone else might have moved the finger even further |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
2707 |
assert(_finger >= end, "the finger should have moved forward"); |
1374 | 2708 |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
2709 |
if (verbose_low()) { |
1374 | 2710 |
gclog_or_tty->print_cr("[%d] we were successful with region = " |
2711 |
PTR_FORMAT, task_num, curr_region); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
2712 |
} |
1374 | 2713 |
|
2714 |
if (limit > bottom) { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
2715 |
if (verbose_low()) { |
1374 | 2716 |
gclog_or_tty->print_cr("[%d] region "PTR_FORMAT" is not empty, " |
2717 |
"returning it ", task_num, curr_region); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
2718 |
} |
1374 | 2719 |
return curr_region; |
2720 |
} else { |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
2721 |
assert(limit == bottom, |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
2722 |
"the region limit should be at bottom"); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
2723 |
if (verbose_low()) { |
1374 | 2724 |
gclog_or_tty->print_cr("[%d] region "PTR_FORMAT" is empty, " |
2725 |
"returning NULL", task_num, curr_region); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
2726 |
} |
1374 | 2727 |
// we return NULL and the caller should try calling |
2728 |
// claim_region() again. |
|
2729 |
return NULL; |
|
2730 |
} |
|
2731 |
} else { |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
2732 |
assert(_finger > finger, "the finger should have moved forward"); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
2733 |
if (verbose_low()) { |
1374 | 2734 |
gclog_or_tty->print_cr("[%d] somebody else moved the finger, " |
2735 |
"global finger = "PTR_FORMAT", " |
|
2736 |
"our finger = "PTR_FORMAT, |
|
2737 |
task_num, _finger, finger); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
2738 |
} |
1374 | 2739 |
|
2740 |
// read it again |
|
2741 |
finger = _finger; |
|
2742 |
} |
|
2743 |
} |
|
2744 |
||
2745 |
return NULL; |
|
2746 |
} |
|
2747 |
||
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2748 |
#ifndef PRODUCT |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2749 |
enum VerifyNoCSetOopsPhase { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2750 |
VerifyNoCSetOopsStack, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2751 |
VerifyNoCSetOopsQueues, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2752 |
VerifyNoCSetOopsSATBCompleted, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2753 |
VerifyNoCSetOopsSATBThread |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2754 |
}; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2755 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2756 |
class VerifyNoCSetOopsClosure : public OopClosure, public ObjectClosure { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2757 |
private: |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2758 |
G1CollectedHeap* _g1h; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2759 |
VerifyNoCSetOopsPhase _phase; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2760 |
int _info; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2761 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2762 |
const char* phase_str() { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2763 |
switch (_phase) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2764 |
case VerifyNoCSetOopsStack: return "Stack"; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2765 |
case VerifyNoCSetOopsQueues: return "Queue"; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2766 |
case VerifyNoCSetOopsSATBCompleted: return "Completed SATB Buffers"; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2767 |
case VerifyNoCSetOopsSATBThread: return "Thread SATB Buffers"; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2768 |
default: ShouldNotReachHere(); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2769 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2770 |
return NULL; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2771 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2772 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2773 |
void do_object_work(oop obj) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2774 |
guarantee(!_g1h->obj_in_cs(obj), |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2775 |
err_msg("obj: "PTR_FORMAT" in CSet, phase: %s, info: %d", |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2776 |
(void*) obj, phase_str(), _info)); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2777 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2778 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2779 |
public: |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2780 |
VerifyNoCSetOopsClosure() : _g1h(G1CollectedHeap::heap()) { } |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2781 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2782 |
void set_phase(VerifyNoCSetOopsPhase phase, int info = -1) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2783 |
_phase = phase; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2784 |
_info = info; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2785 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2786 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2787 |
virtual void do_oop(oop* p) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2788 |
oop obj = oopDesc::load_decode_heap_oop(p); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2789 |
do_object_work(obj); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2790 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2791 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2792 |
virtual void do_oop(narrowOop* p) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2793 |
// We should not come across narrow oops while scanning marking |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2794 |
// stacks and SATB buffers. |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2795 |
ShouldNotReachHere(); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2796 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2797 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2798 |
virtual void do_object(oop obj) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2799 |
do_object_work(obj); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2800 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2801 |
}; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2802 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2803 |
void ConcurrentMark::verify_no_cset_oops(bool verify_stacks, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2804 |
bool verify_enqueued_buffers, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2805 |
bool verify_thread_buffers, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2806 |
bool verify_fingers) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2807 |
assert(SafepointSynchronize::is_at_safepoint(), "should be at a safepoint"); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2808 |
if (!G1CollectedHeap::heap()->mark_in_progress()) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2809 |
return; |
1374 | 2810 |
} |
6761
f9191297ce83
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
6759
diff
changeset
|
2811 |
|
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2812 |
VerifyNoCSetOopsClosure cl; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2813 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2814 |
if (verify_stacks) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2815 |
// Verify entries on the global mark stack |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2816 |
cl.set_phase(VerifyNoCSetOopsStack); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2817 |
_markStack.oops_do(&cl); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2818 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2819 |
// Verify entries on the task queues |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2820 |
for (int i = 0; i < (int) _max_task_num; i += 1) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2821 |
cl.set_phase(VerifyNoCSetOopsQueues, i); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2822 |
OopTaskQueue* queue = _task_queues->queue(i); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2823 |
queue->oops_do(&cl); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2824 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2825 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2826 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2827 |
SATBMarkQueueSet& satb_qs = JavaThread::satb_mark_queue_set(); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2828 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2829 |
// Verify entries on the enqueued SATB buffers |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2830 |
if (verify_enqueued_buffers) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2831 |
cl.set_phase(VerifyNoCSetOopsSATBCompleted); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2832 |
satb_qs.iterate_completed_buffers_read_only(&cl); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2833 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2834 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2835 |
// Verify entries on the per-thread SATB buffers |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2836 |
if (verify_thread_buffers) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2837 |
cl.set_phase(VerifyNoCSetOopsSATBThread); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2838 |
satb_qs.iterate_thread_buffers_read_only(&cl); |
6761
f9191297ce83
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
6759
diff
changeset
|
2839 |
} |
f9191297ce83
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
6759
diff
changeset
|
2840 |
|
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2841 |
if (verify_fingers) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2842 |
// Verify the global finger |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2843 |
HeapWord* global_finger = finger(); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2844 |
if (global_finger != NULL && global_finger < _heap_end) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2845 |
// The global finger always points to a heap region boundary. We |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2846 |
// use heap_region_containing_raw() to get the containing region |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2847 |
// given that the global finger could be pointing to a free region |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2848 |
// which subsequently becomes continues humongous. If that |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2849 |
// happens, heap_region_containing() will return the bottom of the |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2850 |
// corresponding starts humongous region and the check below will |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2851 |
// not hold any more. |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2852 |
HeapRegion* global_hr = _g1h->heap_region_containing_raw(global_finger); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2853 |
guarantee(global_finger == global_hr->bottom(), |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2854 |
err_msg("global finger: "PTR_FORMAT" region: "HR_FORMAT, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2855 |
global_finger, HR_FORMAT_PARAMS(global_hr))); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2856 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2857 |
|
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2858 |
// Verify the task fingers |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2859 |
assert(parallel_marking_threads() <= _max_task_num, "sanity"); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2860 |
for (int i = 0; i < (int) parallel_marking_threads(); i += 1) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2861 |
CMTask* task = _tasks[i]; |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2862 |
HeapWord* task_finger = task->finger(); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2863 |
if (task_finger != NULL && task_finger < _heap_end) { |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2864 |
// See above note on the global finger verification. |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2865 |
HeapRegion* task_hr = _g1h->heap_region_containing_raw(task_finger); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2866 |
guarantee(task_finger == task_hr->bottom() || |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2867 |
!task_hr->in_collection_set(), |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2868 |
err_msg("task finger: "PTR_FORMAT" region: "HR_FORMAT, |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2869 |
task_finger, HR_FORMAT_PARAMS(task_hr))); |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2870 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2871 |
} |
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2872 |
} |
1374 | 2873 |
} |
11455
a6ab3d8b9a4c
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
11451
diff
changeset
|
2874 |
#endif // PRODUCT |
1374 | 2875 |
|
9417
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
2876 |
void ConcurrentMark::clear_marking_state(bool clear_overflow) { |
1374 | 2877 |
_markStack.setEmpty(); |
2878 |
_markStack.clear_overflow(); |
|
9417
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
2879 |
if (clear_overflow) { |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
2880 |
clear_has_overflown(); |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
2881 |
} else { |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
2882 |
assert(has_overflown(), "pre-condition"); |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
2883 |
} |
1374 | 2884 |
_finger = _heap_start; |
2885 |
||
2886 |
for (int i = 0; i < (int)_max_task_num; ++i) { |
|
2887 |
OopTaskQueue* queue = _task_queues->queue(i); |
|
2888 |
queue->set_empty(); |
|
2889 |
} |
|
2890 |
} |
|
2891 |
||
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2892 |
// Aggregate the counting data that was constructed concurrently |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2893 |
// with marking. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2894 |
class AggregateCountDataHRClosure: public HeapRegionClosure { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2895 |
ConcurrentMark* _cm; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2896 |
BitMap* _cm_card_bm; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2897 |
size_t _max_task_num; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2898 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2899 |
public: |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2900 |
AggregateCountDataHRClosure(ConcurrentMark *cm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2901 |
BitMap* cm_card_bm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2902 |
size_t max_task_num) : |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2903 |
_cm(cm), _cm_card_bm(cm_card_bm), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2904 |
_max_task_num(max_task_num) { } |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2905 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2906 |
bool is_card_aligned(HeapWord* p) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2907 |
return ((uintptr_t(p) & (CardTableModRefBS::card_size - 1)) == 0); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2908 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2909 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2910 |
bool doHeapRegion(HeapRegion* hr) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2911 |
if (hr->continuesHumongous()) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2912 |
// We will ignore these here and process them when their |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2913 |
// associated "starts humongous" region is processed. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2914 |
// Note that we cannot rely on their associated |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2915 |
// "starts humongous" region to have their bit set to 1 |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2916 |
// since, due to the region chunking in the parallel region |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2917 |
// iteration, a "continues humongous" region might be visited |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2918 |
// before its associated "starts humongous". |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2919 |
return false; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2920 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2921 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2922 |
HeapWord* start = hr->bottom(); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2923 |
HeapWord* limit = hr->next_top_at_mark_start(); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2924 |
HeapWord* end = hr->end(); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2925 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2926 |
assert(start <= limit && limit <= hr->top() && hr->top() <= hr->end(), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2927 |
err_msg("Preconditions not met - " |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2928 |
"start: "PTR_FORMAT", limit: "PTR_FORMAT", " |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2929 |
"top: "PTR_FORMAT", end: "PTR_FORMAT, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2930 |
start, limit, hr->top(), hr->end())); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2931 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2932 |
assert(hr->next_marked_bytes() == 0, "Precondition"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2933 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2934 |
if (start == limit) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2935 |
// NTAMS of this region has not been set so nothing to do. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2936 |
return false; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2937 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2938 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2939 |
assert(is_card_aligned(start), "sanity"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2940 |
assert(is_card_aligned(end), "sanity"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2941 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2942 |
BitMap::idx_t start_idx = _cm->card_bitmap_index_for(start); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2943 |
BitMap::idx_t limit_idx = _cm->card_bitmap_index_for(limit); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2944 |
BitMap::idx_t end_idx = _cm->card_bitmap_index_for(end); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2945 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2946 |
// If ntams is not card aligned then we bump the index for |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2947 |
// limit so that we get the card spanning ntams. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2948 |
if (!is_card_aligned(limit)) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2949 |
limit_idx += 1; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2950 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2951 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2952 |
assert(limit_idx <= end_idx, "or else use atomics"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2953 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2954 |
// Aggregate the "stripe" in the count data associated with hr. |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
2955 |
uint hrs_index = hr->hrs_index(); |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2956 |
size_t marked_bytes = 0; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2957 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2958 |
for (int i = 0; (size_t)i < _max_task_num; i += 1) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2959 |
size_t* marked_bytes_array = _cm->count_marked_bytes_array_for(i); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2960 |
BitMap* task_card_bm = _cm->count_card_bitmap_for(i); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2961 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2962 |
// Fetch the marked_bytes in this region for task i and |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2963 |
// add it to the running total for this region. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2964 |
marked_bytes += marked_bytes_array[hrs_index]; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2965 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2966 |
// Now union the bitmaps[0,max_task_num)[start_idx..limit_idx) |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2967 |
// into the global card bitmap. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2968 |
BitMap::idx_t scan_idx = task_card_bm->get_next_one_offset(start_idx, limit_idx); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2969 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2970 |
while (scan_idx < limit_idx) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2971 |
assert(task_card_bm->at(scan_idx) == true, "should be"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2972 |
_cm_card_bm->set_bit(scan_idx); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2973 |
assert(_cm_card_bm->at(scan_idx) == true, "should be"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2974 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2975 |
// BitMap::get_next_one_offset() can handle the case when |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2976 |
// its left_offset parameter is greater than its right_offset |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2977 |
// parameter. If does, however, have an early exit if |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2978 |
// left_offset == right_offset. So let's limit the value |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2979 |
// passed in for left offset here. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2980 |
BitMap::idx_t next_idx = MIN2(scan_idx + 1, limit_idx); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2981 |
scan_idx = task_card_bm->get_next_one_offset(next_idx, limit_idx); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2982 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2983 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2984 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2985 |
// Update the marked bytes for this region. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2986 |
hr->add_to_marked_bytes(marked_bytes); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2987 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2988 |
// Next heap region |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2989 |
return false; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2990 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2991 |
}; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2992 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2993 |
class G1AggregateCountDataTask: public AbstractGangTask { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2994 |
protected: |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2995 |
G1CollectedHeap* _g1h; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2996 |
ConcurrentMark* _cm; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2997 |
BitMap* _cm_card_bm; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2998 |
size_t _max_task_num; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
2999 |
int _active_workers; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3000 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3001 |
public: |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3002 |
G1AggregateCountDataTask(G1CollectedHeap* g1h, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3003 |
ConcurrentMark* cm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3004 |
BitMap* cm_card_bm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3005 |
size_t max_task_num, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3006 |
int n_workers) : |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3007 |
AbstractGangTask("Count Aggregation"), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3008 |
_g1h(g1h), _cm(cm), _cm_card_bm(cm_card_bm), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3009 |
_max_task_num(max_task_num), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3010 |
_active_workers(n_workers) { } |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3011 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3012 |
void work(uint worker_id) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3013 |
AggregateCountDataHRClosure cl(_cm, _cm_card_bm, _max_task_num); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3014 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3015 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3016 |
_g1h->heap_region_par_iterate_chunked(&cl, worker_id, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3017 |
_active_workers, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3018 |
HeapRegion::AggregateCountClaimValue); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3019 |
} else { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3020 |
_g1h->heap_region_iterate(&cl); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3021 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3022 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3023 |
}; |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3024 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3025 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3026 |
void ConcurrentMark::aggregate_count_data() { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3027 |
int n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3028 |
_g1h->workers()->active_workers() : |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3029 |
1); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3030 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3031 |
G1AggregateCountDataTask g1_par_agg_task(_g1h, this, &_card_bm, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3032 |
_max_task_num, n_workers); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3033 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3034 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3035 |
assert(_g1h->check_heap_region_claim_values(HeapRegion::InitialClaimValue), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3036 |
"sanity check"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3037 |
_g1h->set_par_threads(n_workers); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3038 |
_g1h->workers()->run_task(&g1_par_agg_task); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3039 |
_g1h->set_par_threads(0); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3040 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3041 |
assert(_g1h->check_heap_region_claim_values(HeapRegion::AggregateCountClaimValue), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3042 |
"sanity check"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3043 |
_g1h->reset_heap_region_claim_values(); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3044 |
} else { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3045 |
g1_par_agg_task.work(0); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3046 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3047 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3048 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3049 |
// Clear the per-worker arrays used to store the per-region counting data |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3050 |
void ConcurrentMark::clear_all_count_data() { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3051 |
// Clear the global card bitmap - it will be filled during |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3052 |
// liveness count aggregation (during remark) and the |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3053 |
// final counting task. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3054 |
_card_bm.clear(); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3055 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3056 |
// Clear the global region bitmap - it will be filled as part |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3057 |
// of the final counting task. |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3058 |
_region_bm.clear(); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3059 |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3060 |
uint max_regions = _g1h->max_regions(); |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3061 |
assert(_max_task_num != 0, "unitialized"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3062 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3063 |
for (int i = 0; (size_t) i < _max_task_num; i += 1) { |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3064 |
BitMap* task_card_bm = count_card_bitmap_for(i); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3065 |
size_t* marked_bytes_array = count_marked_bytes_array_for(i); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3066 |
|
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3067 |
assert(task_card_bm->size() == _card_bm.size(), "size mismatch"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3068 |
assert(marked_bytes_array != NULL, "uninitialized"); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3069 |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12379
diff
changeset
|
3070 |
memset(marked_bytes_array, 0, (size_t) max_regions * sizeof(size_t)); |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3071 |
task_card_bm->clear(); |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3072 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3073 |
} |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3074 |
|
1374 | 3075 |
void ConcurrentMark::print_stats() { |
3076 |
if (verbose_stats()) { |
|
3077 |
gclog_or_tty->print_cr("---------------------------------------------------------------------"); |
|
3078 |
for (size_t i = 0; i < _active_tasks; ++i) { |
|
3079 |
_tasks[i]->print_stats(); |
|
3080 |
gclog_or_tty->print_cr("---------------------------------------------------------------------"); |
|
3081 |
} |
|
3082 |
} |
|
3083 |
} |
|
3084 |
||
3085 |
// abandon current marking iteration due to a Full GC |
|
3086 |
void ConcurrentMark::abort() { |
|
3087 |
// Clear all marks to force marking thread to do nothing |
|
3088 |
_nextMarkBitMap->clearAll(); |
|
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3089 |
// Clear the liveness counting data |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3090 |
clear_all_count_data(); |
1374 | 3091 |
// Empty mark stack |
3092 |
clear_marking_state(); |
|
6761
f9191297ce83
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
6759
diff
changeset
|
3093 |
for (int i = 0; i < (int)_max_task_num; ++i) { |
1374 | 3094 |
_tasks[i]->clear_region_fields(); |
6761
f9191297ce83
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
6759
diff
changeset
|
3095 |
} |
1374 | 3096 |
_has_aborted = true; |
3097 |
||
3098 |
SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); |
|
3099 |
satb_mq_set.abandon_partial_marking(); |
|
5082
19e725a3d2eb
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
5079
diff
changeset
|
3100 |
// This can be called either during or outside marking, we'll read |
19e725a3d2eb
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
5079
diff
changeset
|
3101 |
// the expected_active value from the SATB queue set. |
19e725a3d2eb
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
5079
diff
changeset
|
3102 |
satb_mq_set.set_active_all_threads( |
19e725a3d2eb
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
5079
diff
changeset
|
3103 |
false, /* new active value */ |
19e725a3d2eb
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
5079
diff
changeset
|
3104 |
satb_mq_set.is_active() /* expected_active */); |
1374 | 3105 |
} |
3106 |
||
3107 |
static void print_ms_time_info(const char* prefix, const char* name, |
|
3108 |
NumberSeq& ns) { |
|
3109 |
gclog_or_tty->print_cr("%s%5d %12s: total time = %8.2f s (avg = %8.2f ms).", |
|
3110 |
prefix, ns.num(), name, ns.sum()/1000.0, ns.avg()); |
|
3111 |
if (ns.num() > 0) { |
|
3112 |
gclog_or_tty->print_cr("%s [std. dev = %8.2f ms, max = %8.2f ms]", |
|
3113 |
prefix, ns.sd(), ns.maximum()); |
|
3114 |
} |
|
3115 |
} |
|
3116 |
||
3117 |
void ConcurrentMark::print_summary_info() { |
|
3118 |
gclog_or_tty->print_cr(" Concurrent marking:"); |
|
3119 |
print_ms_time_info(" ", "init marks", _init_times); |
|
3120 |
print_ms_time_info(" ", "remarks", _remark_times); |
|
3121 |
{ |
|
3122 |
print_ms_time_info(" ", "final marks", _remark_mark_times); |
|
3123 |
print_ms_time_info(" ", "weak refs", _remark_weak_ref_times); |
|
3124 |
||
3125 |
} |
|
3126 |
print_ms_time_info(" ", "cleanups", _cleanup_times); |
|
3127 |
gclog_or_tty->print_cr(" Final counting total time = %8.2f s (avg = %8.2f ms).", |
|
3128 |
_total_counting_time, |
|
3129 |
(_cleanup_times.num() > 0 ? _total_counting_time * 1000.0 / |
|
3130 |
(double)_cleanup_times.num() |
|
3131 |
: 0.0)); |
|
3132 |
if (G1ScrubRemSets) { |
|
3133 |
gclog_or_tty->print_cr(" RS scrub total time = %8.2f s (avg = %8.2f ms).", |
|
3134 |
_total_rs_scrub_time, |
|
3135 |
(_cleanup_times.num() > 0 ? _total_rs_scrub_time * 1000.0 / |
|
3136 |
(double)_cleanup_times.num() |
|
3137 |
: 0.0)); |
|
3138 |
} |
|
3139 |
gclog_or_tty->print_cr(" Total stop_world time = %8.2f s.", |
|
3140 |
(_init_times.sum() + _remark_times.sum() + |
|
3141 |
_cleanup_times.sum())/1000.0); |
|
3142 |
gclog_or_tty->print_cr(" Total concurrent time = %8.2f s " |
|
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3143 |
"(%8.2f s marking).", |
1374 | 3144 |
cmThread()->vtime_accum(), |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
3145 |
cmThread()->vtime_mark_accum()); |
1374 | 3146 |
} |
3147 |
||
4022 | 3148 |
void ConcurrentMark::print_worker_threads_on(outputStream* st) const { |
3149 |
_parallel_workers->print_worker_threads_on(st); |
|
3150 |
} |
|
3151 |
||
1374 | 3152 |
// We take a break if someone is trying to stop the world. |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
3153 |
bool ConcurrentMark::do_yield_check(uint worker_id) { |
1374 | 3154 |
if (should_yield()) { |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
3155 |
if (worker_id == 0) { |
1374 | 3156 |
_g1h->g1_policy()->record_concurrent_pause(); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3157 |
} |
1374 | 3158 |
cmThread()->yield(); |
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11250
diff
changeset
|
3159 |
if (worker_id == 0) { |
1374 | 3160 |
_g1h->g1_policy()->record_concurrent_pause_end(); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3161 |
} |
1374 | 3162 |
return true; |
3163 |
} else { |
|
3164 |
return false; |
|
3165 |
} |
|
3166 |
} |
|
3167 |
||
3168 |
bool ConcurrentMark::should_yield() { |
|
3169 |
return cmThread()->should_yield(); |
|
3170 |
} |
|
3171 |
||
3172 |
bool ConcurrentMark::containing_card_is_marked(void* p) { |
|
3173 |
size_t offset = pointer_delta(p, _g1h->reserved_region().start(), 1); |
|
3174 |
return _card_bm.at(offset >> CardTableModRefBS::card_shift); |
|
3175 |
} |
|
3176 |
||
3177 |
bool ConcurrentMark::containing_cards_are_marked(void* start, |
|
3178 |
void* last) { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3179 |
return containing_card_is_marked(start) && |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3180 |
containing_card_is_marked(last); |
1374 | 3181 |
} |
3182 |
||
3183 |
#ifndef PRODUCT |
|
3184 |
// for debugging purposes |
|
3185 |
void ConcurrentMark::print_finger() { |
|
3186 |
gclog_or_tty->print_cr("heap ["PTR_FORMAT", "PTR_FORMAT"), global finger = "PTR_FORMAT, |
|
3187 |
_heap_start, _heap_end, _finger); |
|
3188 |
for (int i = 0; i < (int) _max_task_num; ++i) { |
|
3189 |
gclog_or_tty->print(" %d: "PTR_FORMAT, i, _tasks[i]->finger()); |
|
3190 |
} |
|
3191 |
gclog_or_tty->print_cr(""); |
|
3192 |
} |
|
3193 |
#endif |
|
3194 |
||
9994 | 3195 |
void CMTask::scan_object(oop obj) { |
3196 |
assert(_nextMarkBitMap->isMarked((HeapWord*) obj), "invariant"); |
|
3197 |
||
3198 |
if (_cm->verbose_high()) { |
|
3199 |
gclog_or_tty->print_cr("[%d] we're scanning object "PTR_FORMAT, |
|
3200 |
_task_id, (void*) obj); |
|
3201 |
} |
|
3202 |
||
3203 |
size_t obj_size = obj->size(); |
|
3204 |
_words_scanned += obj_size; |
|
3205 |
||
3206 |
obj->oop_iterate(_cm_oop_closure); |
|
3207 |
statsOnly( ++_objs_scanned ); |
|
3208 |
check_limits(); |
|
3209 |
} |
|
3210 |
||
1374 | 3211 |
// Closure for iteration over bitmaps |
3212 |
class CMBitMapClosure : public BitMapClosure { |
|
3213 |
private: |
|
3214 |
// the bitmap that is being iterated over |
|
3215 |
CMBitMap* _nextMarkBitMap; |
|
3216 |
ConcurrentMark* _cm; |
|
3217 |
CMTask* _task; |
|
3218 |
||
3219 |
public: |
|
12272
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3220 |
CMBitMapClosure(CMTask *task, ConcurrentMark* cm, CMBitMap* nextMarkBitMap) : |
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3221 |
_task(task), _cm(cm), _nextMarkBitMap(nextMarkBitMap) { } |
1374 | 3222 |
|
3223 |
bool do_bit(size_t offset) { |
|
3224 |
HeapWord* addr = _nextMarkBitMap->offsetToHeapWord(offset); |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3225 |
assert(_nextMarkBitMap->isMarked(addr), "invariant"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3226 |
assert( addr < _cm->finger(), "invariant"); |
1374 | 3227 |
|
12272
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3228 |
statsOnly( _task->increase_objs_found_on_bitmap() ); |
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3229 |
assert(addr >= _task->finger(), "invariant"); |
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3230 |
|
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3231 |
// We move that task's local finger along. |
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3232 |
_task->move_finger_to(addr); |
1374 | 3233 |
|
3234 |
_task->scan_object(oop(addr)); |
|
3235 |
// we only partially drain the local queue and global stack |
|
3236 |
_task->drain_local_queue(true); |
|
3237 |
_task->drain_global_stack(true); |
|
3238 |
||
3239 |
// if the has_aborted flag has been raised, we need to bail out of |
|
3240 |
// the iteration |
|
3241 |
return !_task->has_aborted(); |
|
3242 |
} |
|
3243 |
}; |
|
3244 |
||
3245 |
// Closure for iterating over objects, currently only used for |
|
3246 |
// processing SATB buffers. |
|
3247 |
class CMObjectClosure : public ObjectClosure { |
|
3248 |
private: |
|
3249 |
CMTask* _task; |
|
3250 |
||
3251 |
public: |
|
3252 |
void do_object(oop obj) { |
|
3253 |
_task->deal_with_reference(obj); |
|
3254 |
} |
|
3255 |
||
3256 |
CMObjectClosure(CMTask* task) : _task(task) { } |
|
3257 |
}; |
|
3258 |
||
9994 | 3259 |
G1CMOopClosure::G1CMOopClosure(G1CollectedHeap* g1h, |
3260 |
ConcurrentMark* cm, |
|
3261 |
CMTask* task) |
|
3262 |
: _g1h(g1h), _cm(cm), _task(task) { |
|
3263 |
assert(_ref_processor == NULL, "should be initialized to NULL"); |
|
3264 |
||
3265 |
if (G1UseConcMarkReferenceProcessing) { |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10668
diff
changeset
|
3266 |
_ref_processor = g1h->ref_processor_cm(); |
9994 | 3267 |
assert(_ref_processor != NULL, "should not be NULL"); |
1374 | 3268 |
} |
9994 | 3269 |
} |
1374 | 3270 |
|
3271 |
void CMTask::setup_for_region(HeapRegion* hr) { |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3272 |
// Separated the asserts so that we know which one fires. |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3273 |
assert(hr != NULL, |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3274 |
"claim_region() should have filtered out continues humongous regions"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3275 |
assert(!hr->continuesHumongous(), |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3276 |
"claim_region() should have filtered out continues humongous regions"); |
1374 | 3277 |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3278 |
if (_cm->verbose_low()) { |
1374 | 3279 |
gclog_or_tty->print_cr("[%d] setting up for region "PTR_FORMAT, |
3280 |
_task_id, hr); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3281 |
} |
1374 | 3282 |
|
3283 |
_curr_region = hr; |
|
3284 |
_finger = hr->bottom(); |
|
3285 |
update_region_limit(); |
|
3286 |
} |
|
3287 |
||
3288 |
void CMTask::update_region_limit() { |
|
3289 |
HeapRegion* hr = _curr_region; |
|
3290 |
HeapWord* bottom = hr->bottom(); |
|
3291 |
HeapWord* limit = hr->next_top_at_mark_start(); |
|
3292 |
||
3293 |
if (limit == bottom) { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3294 |
if (_cm->verbose_low()) { |
1374 | 3295 |
gclog_or_tty->print_cr("[%d] found an empty region " |
3296 |
"["PTR_FORMAT", "PTR_FORMAT")", |
|
3297 |
_task_id, bottom, limit); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3298 |
} |
1374 | 3299 |
// The region was collected underneath our feet. |
3300 |
// We set the finger to bottom to ensure that the bitmap |
|
3301 |
// iteration that will follow this will not do anything. |
|
3302 |
// (this is not a condition that holds when we set the region up, |
|
3303 |
// as the region is not supposed to be empty in the first place) |
|
3304 |
_finger = bottom; |
|
3305 |
} else if (limit >= _region_limit) { |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3306 |
assert(limit >= _finger, "peace of mind"); |
1374 | 3307 |
} else { |
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3308 |
assert(limit < _region_limit, "only way to get here"); |
1374 | 3309 |
// This can happen under some pretty unusual circumstances. An |
3310 |
// evacuation pause empties the region underneath our feet (NTAMS |
|
3311 |
// at bottom). We then do some allocation in the region (NTAMS |
|
3312 |
// stays at bottom), followed by the region being used as a GC |
|
3313 |
// alloc region (NTAMS will move to top() and the objects |
|
3314 |
// originally below it will be grayed). All objects now marked in |
|
3315 |
// the region are explicitly grayed, if below the global finger, |
|
3316 |
// and we do not need in fact to scan anything else. So, we simply |
|
3317 |
// set _finger to be limit to ensure that the bitmap iteration |
|
3318 |
// doesn't do anything. |
|
3319 |
_finger = limit; |
|
3320 |
} |
|
3321 |
||
3322 |
_region_limit = limit; |
|
3323 |
} |
|
3324 |
||
3325 |
void CMTask::giveup_current_region() { |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3326 |
assert(_curr_region != NULL, "invariant"); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3327 |
if (_cm->verbose_low()) { |
1374 | 3328 |
gclog_or_tty->print_cr("[%d] giving up region "PTR_FORMAT, |
3329 |
_task_id, _curr_region); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3330 |
} |
1374 | 3331 |
clear_region_fields(); |
3332 |
} |
|
3333 |
||
3334 |
void CMTask::clear_region_fields() { |
|
3335 |
// Values for these three fields that indicate that we're not |
|
3336 |
// holding on to a region. |
|
3337 |
_curr_region = NULL; |
|
3338 |
_finger = NULL; |
|
3339 |
_region_limit = NULL; |
|
3340 |
} |
|
3341 |
||
9994 | 3342 |
void CMTask::set_cm_oop_closure(G1CMOopClosure* cm_oop_closure) { |
3343 |
if (cm_oop_closure == NULL) { |
|
3344 |
assert(_cm_oop_closure != NULL, "invariant"); |
|
3345 |
} else { |
|
3346 |
assert(_cm_oop_closure == NULL, "invariant"); |
|
3347 |
} |
|
3348 |
_cm_oop_closure = cm_oop_closure; |
|
3349 |
} |
|
3350 |
||
1374 | 3351 |
void CMTask::reset(CMBitMap* nextMarkBitMap) { |
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3352 |
guarantee(nextMarkBitMap != NULL, "invariant"); |
1374 | 3353 |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3354 |
if (_cm->verbose_low()) { |
1374 | 3355 |
gclog_or_tty->print_cr("[%d] resetting", _task_id); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3356 |
} |
1374 | 3357 |
|
3358 |
_nextMarkBitMap = nextMarkBitMap; |
|
3359 |
clear_region_fields(); |
|
3360 |
||
3361 |
_calls = 0; |
|
3362 |
_elapsed_time_ms = 0.0; |
|
3363 |
_termination_time_ms = 0.0; |
|
3364 |
_termination_start_time_ms = 0.0; |
|
3365 |
||
3366 |
#if _MARKING_STATS_ |
|
3367 |
_local_pushes = 0; |
|
3368 |
_local_pops = 0; |
|
3369 |
_local_max_size = 0; |
|
3370 |
_objs_scanned = 0; |
|
3371 |
_global_pushes = 0; |
|
3372 |
_global_pops = 0; |
|
3373 |
_global_max_size = 0; |
|
3374 |
_global_transfers_to = 0; |
|
3375 |
_global_transfers_from = 0; |
|
3376 |
_regions_claimed = 0; |
|
3377 |
_objs_found_on_bitmap = 0; |
|
3378 |
_satb_buffers_processed = 0; |
|
3379 |
_steal_attempts = 0; |
|
3380 |
_steals = 0; |
|
3381 |
_aborted = 0; |
|
3382 |
_aborted_overflow = 0; |
|
3383 |
_aborted_cm_aborted = 0; |
|
3384 |
_aborted_yield = 0; |
|
3385 |
_aborted_timed_out = 0; |
|
3386 |
_aborted_satb = 0; |
|
3387 |
_aborted_termination = 0; |
|
3388 |
#endif // _MARKING_STATS_ |
|
3389 |
} |
|
3390 |
||
3391 |
bool CMTask::should_exit_termination() { |
|
3392 |
regular_clock_call(); |
|
3393 |
// This is called when we are in the termination protocol. We should |
|
3394 |
// quit if, for some reason, this task wants to abort or the global |
|
3395 |
// stack is not empty (this means that we can get work from it). |
|
3396 |
return !_cm->mark_stack_empty() || has_aborted(); |
|
3397 |
} |
|
3398 |
||
3399 |
void CMTask::reached_limit() { |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3400 |
assert(_words_scanned >= _words_scanned_limit || |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3401 |
_refs_reached >= _refs_reached_limit , |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3402 |
"shouldn't have been called otherwise"); |
1374 | 3403 |
regular_clock_call(); |
3404 |
} |
|
3405 |
||
3406 |
void CMTask::regular_clock_call() { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3407 |
if (has_aborted()) return; |
1374 | 3408 |
|
3409 |
// First, we need to recalculate the words scanned and refs reached |
|
3410 |
// limits for the next clock call. |
|
3411 |
recalculate_limits(); |
|
3412 |
||
3413 |
// During the regular clock call we do the following |
|
3414 |
||
3415 |
// (1) If an overflow has been flagged, then we abort. |
|
3416 |
if (_cm->has_overflown()) { |
|
3417 |
set_has_aborted(); |
|
3418 |
return; |
|
3419 |
} |
|
3420 |
||
3421 |
// If we are not concurrent (i.e. we're doing remark) we don't need |
|
3422 |
// to check anything else. The other steps are only needed during |
|
3423 |
// the concurrent marking phase. |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3424 |
if (!concurrent()) return; |
1374 | 3425 |
|
3426 |
// (2) If marking has been aborted for Full GC, then we also abort. |
|
3427 |
if (_cm->has_aborted()) { |
|
3428 |
set_has_aborted(); |
|
3429 |
statsOnly( ++_aborted_cm_aborted ); |
|
3430 |
return; |
|
3431 |
} |
|
3432 |
||
3433 |
double curr_time_ms = os::elapsedVTime() * 1000.0; |
|
3434 |
||
3435 |
// (3) If marking stats are enabled, then we update the step history. |
|
3436 |
#if _MARKING_STATS_ |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3437 |
if (_words_scanned >= _words_scanned_limit) { |
1374 | 3438 |
++_clock_due_to_scanning; |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3439 |
} |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3440 |
if (_refs_reached >= _refs_reached_limit) { |
1374 | 3441 |
++_clock_due_to_marking; |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3442 |
} |
1374 | 3443 |
|
3444 |
double last_interval_ms = curr_time_ms - _interval_start_time_ms; |
|
3445 |
_interval_start_time_ms = curr_time_ms; |
|
3446 |
_all_clock_intervals_ms.add(last_interval_ms); |
|
3447 |
||
3448 |
if (_cm->verbose_medium()) { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3449 |
gclog_or_tty->print_cr("[%d] regular clock, interval = %1.2lfms, " |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3450 |
"scanned = %d%s, refs reached = %d%s", |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3451 |
_task_id, last_interval_ms, |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3452 |
_words_scanned, |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3453 |
(_words_scanned >= _words_scanned_limit) ? " (*)" : "", |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3454 |
_refs_reached, |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3455 |
(_refs_reached >= _refs_reached_limit) ? " (*)" : ""); |
1374 | 3456 |
} |
3457 |
#endif // _MARKING_STATS_ |
|
3458 |
||
3459 |
// (4) We check whether we should yield. If we have to, then we abort. |
|
3460 |
if (_cm->should_yield()) { |
|
3461 |
// We should yield. To do this we abort the task. The caller is |
|
3462 |
// responsible for yielding. |
|
3463 |
set_has_aborted(); |
|
3464 |
statsOnly( ++_aborted_yield ); |
|
3465 |
return; |
|
3466 |
} |
|
3467 |
||
3468 |
// (5) We check whether we've reached our time quota. If we have, |
|
3469 |
// then we abort. |
|
3470 |
double elapsed_time_ms = curr_time_ms - _start_time_ms; |
|
3471 |
if (elapsed_time_ms > _time_target_ms) { |
|
3472 |
set_has_aborted(); |
|
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
3473 |
_has_timed_out = true; |
1374 | 3474 |
statsOnly( ++_aborted_timed_out ); |
3475 |
return; |
|
3476 |
} |
|
3477 |
||
3478 |
// (6) Finally, we check whether there are enough completed STAB |
|
3479 |
// buffers available for processing. If there are, we abort. |
|
3480 |
SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); |
|
3481 |
if (!_draining_satb_buffers && satb_mq_set.process_completed_buffers()) { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3482 |
if (_cm->verbose_low()) { |
1374 | 3483 |
gclog_or_tty->print_cr("[%d] aborting to deal with pending SATB buffers", |
3484 |
_task_id); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3485 |
} |
1374 | 3486 |
// we do need to process SATB buffers, we'll abort and restart |
3487 |
// the marking task to do so |
|
3488 |
set_has_aborted(); |
|
3489 |
statsOnly( ++_aborted_satb ); |
|
3490 |
return; |
|
3491 |
} |
|
3492 |
} |
|
3493 |
||
3494 |
void CMTask::recalculate_limits() { |
|
3495 |
_real_words_scanned_limit = _words_scanned + words_scanned_period; |
|
3496 |
_words_scanned_limit = _real_words_scanned_limit; |
|
3497 |
||
3498 |
_real_refs_reached_limit = _refs_reached + refs_reached_period; |
|
3499 |
_refs_reached_limit = _real_refs_reached_limit; |
|
3500 |
} |
|
3501 |
||
3502 |
void CMTask::decrease_limits() { |
|
3503 |
// This is called when we believe that we're going to do an infrequent |
|
3504 |
// operation which will increase the per byte scanned cost (i.e. move |
|
3505 |
// entries to/from the global stack). It basically tries to decrease the |
|
3506 |
// scanning limit so that the clock is called earlier. |
|
3507 |
||
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3508 |
if (_cm->verbose_medium()) { |
1374 | 3509 |
gclog_or_tty->print_cr("[%d] decreasing limits", _task_id); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3510 |
} |
1374 | 3511 |
|
3512 |
_words_scanned_limit = _real_words_scanned_limit - |
|
3513 |
3 * words_scanned_period / 4; |
|
3514 |
_refs_reached_limit = _real_refs_reached_limit - |
|
3515 |
3 * refs_reached_period / 4; |
|
3516 |
} |
|
3517 |
||
3518 |
void CMTask::move_entries_to_global_stack() { |
|
3519 |
// local array where we'll store the entries that will be popped |
|
3520 |
// from the local queue |
|
3521 |
oop buffer[global_stack_transfer_size]; |
|
3522 |
||
3523 |
int n = 0; |
|
3524 |
oop obj; |
|
3525 |
while (n < global_stack_transfer_size && _task_queue->pop_local(obj)) { |
|
3526 |
buffer[n] = obj; |
|
3527 |
++n; |
|
3528 |
} |
|
3529 |
||
3530 |
if (n > 0) { |
|
3531 |
// we popped at least one entry from the local queue |
|
3532 |
||
3533 |
statsOnly( ++_global_transfers_to; _local_pops += n ); |
|
3534 |
||
3535 |
if (!_cm->mark_stack_push(buffer, n)) { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3536 |
if (_cm->verbose_low()) { |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3537 |
gclog_or_tty->print_cr("[%d] aborting due to global stack overflow", |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3538 |
_task_id); |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3539 |
} |
1374 | 3540 |
set_has_aborted(); |
3541 |
} else { |
|
3542 |
// the transfer was successful |
|
3543 |
||
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3544 |
if (_cm->verbose_medium()) { |
1374 | 3545 |
gclog_or_tty->print_cr("[%d] pushed %d entries to the global stack", |
3546 |
_task_id, n); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3547 |
} |
1374 | 3548 |
statsOnly( int tmp_size = _cm->mark_stack_size(); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3549 |
if (tmp_size > _global_max_size) { |
1374 | 3550 |
_global_max_size = tmp_size; |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3551 |
} |
1374 | 3552 |
_global_pushes += n ); |
3553 |
} |
|
3554 |
} |
|
3555 |
||
3556 |
// this operation was quite expensive, so decrease the limits |
|
3557 |
decrease_limits(); |
|
3558 |
} |
|
3559 |
||
3560 |
void CMTask::get_entries_from_global_stack() { |
|
3561 |
// local array where we'll store the entries that will be popped |
|
3562 |
// from the global stack. |
|
3563 |
oop buffer[global_stack_transfer_size]; |
|
3564 |
int n; |
|
3565 |
_cm->mark_stack_pop(buffer, global_stack_transfer_size, &n); |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3566 |
assert(n <= global_stack_transfer_size, |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3567 |
"we should not pop more than the given limit"); |
1374 | 3568 |
if (n > 0) { |
3569 |
// yes, we did actually pop at least one entry |
|
3570 |
||
3571 |
statsOnly( ++_global_transfers_from; _global_pops += n ); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3572 |
if (_cm->verbose_medium()) { |
1374 | 3573 |
gclog_or_tty->print_cr("[%d] popped %d entries from the global stack", |
3574 |
_task_id, n); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3575 |
} |
1374 | 3576 |
for (int i = 0; i < n; ++i) { |
3577 |
bool success = _task_queue->push(buffer[i]); |
|
3578 |
// We only call this when the local queue is empty or under a |
|
3579 |
// given target limit. So, we do not expect this push to fail. |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3580 |
assert(success, "invariant"); |
1374 | 3581 |
} |
3582 |
||
3583 |
statsOnly( int tmp_size = _task_queue->size(); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3584 |
if (tmp_size > _local_max_size) { |
1374 | 3585 |
_local_max_size = tmp_size; |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3586 |
} |
1374 | 3587 |
_local_pushes += n ); |
3588 |
} |
|
3589 |
||
3590 |
// this operation was quite expensive, so decrease the limits |
|
3591 |
decrease_limits(); |
|
3592 |
} |
|
3593 |
||
3594 |
void CMTask::drain_local_queue(bool partially) { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3595 |
if (has_aborted()) return; |
1374 | 3596 |
|
3597 |
// Decide what the target size is, depending whether we're going to |
|
3598 |
// drain it partially (so that other tasks can steal if they run out |
|
3599 |
// of things to do) or totally (at the very end). |
|
3600 |
size_t target_size; |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3601 |
if (partially) { |
1374 | 3602 |
target_size = MIN2((size_t)_task_queue->max_elems()/3, GCDrainStackTargetSize); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3603 |
} else { |
1374 | 3604 |
target_size = 0; |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3605 |
} |
1374 | 3606 |
|
3607 |
if (_task_queue->size() > target_size) { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3608 |
if (_cm->verbose_high()) { |
1374 | 3609 |
gclog_or_tty->print_cr("[%d] draining local queue, target size = %d", |
3610 |
_task_id, target_size); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3611 |
} |
1374 | 3612 |
|
3613 |
oop obj; |
|
3614 |
bool ret = _task_queue->pop_local(obj); |
|
3615 |
while (ret) { |
|
3616 |
statsOnly( ++_local_pops ); |
|
3617 |
||
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3618 |
if (_cm->verbose_high()) { |
1374 | 3619 |
gclog_or_tty->print_cr("[%d] popped "PTR_FORMAT, _task_id, |
3620 |
(void*) obj); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3621 |
} |
1374 | 3622 |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3623 |
assert(_g1h->is_in_g1_reserved((HeapWord*) obj), "invariant" ); |
8680 | 3624 |
assert(!_g1h->is_on_master_free_list( |
7923 | 3625 |
_g1h->heap_region_containing((HeapWord*) obj)), "invariant"); |
1374 | 3626 |
|
3627 |
scan_object(obj); |
|
3628 |
||
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3629 |
if (_task_queue->size() <= target_size || has_aborted()) { |
1374 | 3630 |
ret = false; |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3631 |
} else { |
1374 | 3632 |
ret = _task_queue->pop_local(obj); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3633 |
} |
1374 | 3634 |
} |
3635 |
||
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3636 |
if (_cm->verbose_high()) { |
1374 | 3637 |
gclog_or_tty->print_cr("[%d] drained local queue, size = %d", |
3638 |
_task_id, _task_queue->size()); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3639 |
} |
1374 | 3640 |
} |
3641 |
} |
|
3642 |
||
3643 |
void CMTask::drain_global_stack(bool partially) { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3644 |
if (has_aborted()) return; |
1374 | 3645 |
|
3646 |
// We have a policy to drain the local queue before we attempt to |
|
3647 |
// drain the global stack. |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3648 |
assert(partially || _task_queue->size() == 0, "invariant"); |
1374 | 3649 |
|
3650 |
// Decide what the target size is, depending whether we're going to |
|
3651 |
// drain it partially (so that other tasks can steal if they run out |
|
3652 |
// of things to do) or totally (at the very end). Notice that, |
|
3653 |
// because we move entries from the global stack in chunks or |
|
3654 |
// because another task might be doing the same, we might in fact |
|
3655 |
// drop below the target. But, this is not a problem. |
|
3656 |
size_t target_size; |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3657 |
if (partially) { |
1374 | 3658 |
target_size = _cm->partial_mark_stack_size_target(); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3659 |
} else { |
1374 | 3660 |
target_size = 0; |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3661 |
} |
1374 | 3662 |
|
3663 |
if (_cm->mark_stack_size() > target_size) { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3664 |
if (_cm->verbose_low()) { |
1374 | 3665 |
gclog_or_tty->print_cr("[%d] draining global_stack, target size %d", |
3666 |
_task_id, target_size); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3667 |
} |
1374 | 3668 |
|
3669 |
while (!has_aborted() && _cm->mark_stack_size() > target_size) { |
|
3670 |
get_entries_from_global_stack(); |
|
3671 |
drain_local_queue(partially); |
|
3672 |
} |
|
3673 |
||
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3674 |
if (_cm->verbose_low()) { |
1374 | 3675 |
gclog_or_tty->print_cr("[%d] drained global stack, size = %d", |
3676 |
_task_id, _cm->mark_stack_size()); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3677 |
} |
1374 | 3678 |
} |
3679 |
} |
|
3680 |
||
3681 |
// SATB Queue has several assumptions on whether to call the par or |
|
3682 |
// non-par versions of the methods. this is why some of the code is |
|
3683 |
// replicated. We should really get rid of the single-threaded version |
|
3684 |
// of the code to simplify things. |
|
3685 |
void CMTask::drain_satb_buffers() { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3686 |
if (has_aborted()) return; |
1374 | 3687 |
|
3688 |
// We set this so that the regular clock knows that we're in the |
|
3689 |
// middle of draining buffers and doesn't set the abort flag when it |
|
3690 |
// notices that SATB buffers are available for draining. It'd be |
|
3691 |
// very counter productive if it did that. :-) |
|
3692 |
_draining_satb_buffers = true; |
|
3693 |
||
3694 |
CMObjectClosure oc(this); |
|
3695 |
SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3696 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
1374 | 3697 |
satb_mq_set.set_par_closure(_task_id, &oc); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3698 |
} else { |
1374 | 3699 |
satb_mq_set.set_closure(&oc); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3700 |
} |
1374 | 3701 |
|
3702 |
// This keeps claiming and applying the closure to completed buffers |
|
3703 |
// until we run out of buffers or we need to abort. |
|
6759
67b1a69ef5aa
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
6261
diff
changeset
|
3704 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
1374 | 3705 |
while (!has_aborted() && |
3706 |
satb_mq_set.par_apply_closure_to_completed_buffer(_task_id)) { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3707 |
if (_cm->verbose_medium()) { |
1374 | 3708 |
gclog_or_tty->print_cr("[%d] processed an SATB buffer", _task_id); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3709 |
} |
1374 | 3710 |
statsOnly( ++_satb_buffers_processed ); |
3711 |
regular_clock_call(); |
|
3712 |
} |
|
3713 |
} else { |
|
3714 |
while (!has_aborted() && |
|
3715 |
satb_mq_set.apply_closure_to_completed_buffer()) { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3716 |
if (_cm->verbose_medium()) { |
1374 | 3717 |
gclog_or_tty->print_cr("[%d] processed an SATB buffer", _task_id); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3718 |
} |
1374 | 3719 |
statsOnly( ++_satb_buffers_processed ); |
3720 |
regular_clock_call(); |
|
3721 |
} |
|
3722 |
} |
|
3723 |
||
3724 |
if (!concurrent() && !has_aborted()) { |
|
3725 |
// We should only do this during remark. |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3726 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
1374 | 3727 |
satb_mq_set.par_iterate_closure_all_threads(_task_id); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3728 |
} else { |
1374 | 3729 |
satb_mq_set.iterate_closure_all_threads(); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3730 |
} |
1374 | 3731 |
} |
3732 |
||
3733 |
_draining_satb_buffers = false; |
|
3734 |
||
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3735 |
assert(has_aborted() || |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3736 |
concurrent() || |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3737 |
satb_mq_set.completed_buffers_num() == 0, "invariant"); |
1374 | 3738 |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3739 |
if (G1CollectedHeap::use_parallel_gc_threads()) { |
1374 | 3740 |
satb_mq_set.set_par_closure(_task_id, NULL); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3741 |
} else { |
1374 | 3742 |
satb_mq_set.set_closure(NULL); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3743 |
} |
1374 | 3744 |
|
3745 |
// again, this was a potentially expensive operation, decrease the |
|
3746 |
// limits to get the regular clock call early |
|
3747 |
decrease_limits(); |
|
3748 |
} |
|
3749 |
||
3750 |
void CMTask::print_stats() { |
|
3751 |
gclog_or_tty->print_cr("Marking Stats, task = %d, calls = %d", |
|
3752 |
_task_id, _calls); |
|
3753 |
gclog_or_tty->print_cr(" Elapsed time = %1.2lfms, Termination time = %1.2lfms", |
|
3754 |
_elapsed_time_ms, _termination_time_ms); |
|
3755 |
gclog_or_tty->print_cr(" Step Times (cum): num = %d, avg = %1.2lfms, sd = %1.2lfms", |
|
3756 |
_step_times_ms.num(), _step_times_ms.avg(), |
|
3757 |
_step_times_ms.sd()); |
|
3758 |
gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms", |
|
3759 |
_step_times_ms.maximum(), _step_times_ms.sum()); |
|
3760 |
||
3761 |
#if _MARKING_STATS_ |
|
3762 |
gclog_or_tty->print_cr(" Clock Intervals (cum): num = %d, avg = %1.2lfms, sd = %1.2lfms", |
|
3763 |
_all_clock_intervals_ms.num(), _all_clock_intervals_ms.avg(), |
|
3764 |
_all_clock_intervals_ms.sd()); |
|
3765 |
gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms", |
|
3766 |
_all_clock_intervals_ms.maximum(), |
|
3767 |
_all_clock_intervals_ms.sum()); |
|
3768 |
gclog_or_tty->print_cr(" Clock Causes (cum): scanning = %d, marking = %d", |
|
3769 |
_clock_due_to_scanning, _clock_due_to_marking); |
|
3770 |
gclog_or_tty->print_cr(" Objects: scanned = %d, found on the bitmap = %d", |
|
3771 |
_objs_scanned, _objs_found_on_bitmap); |
|
3772 |
gclog_or_tty->print_cr(" Local Queue: pushes = %d, pops = %d, max size = %d", |
|
3773 |
_local_pushes, _local_pops, _local_max_size); |
|
3774 |
gclog_or_tty->print_cr(" Global Stack: pushes = %d, pops = %d, max size = %d", |
|
3775 |
_global_pushes, _global_pops, _global_max_size); |
|
3776 |
gclog_or_tty->print_cr(" transfers to = %d, transfers from = %d", |
|
3777 |
_global_transfers_to,_global_transfers_from); |
|
12272
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
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parents:
11584
diff
changeset
|
3778 |
gclog_or_tty->print_cr(" Regions: claimed = %d", _regions_claimed); |
1374 | 3779 |
gclog_or_tty->print_cr(" SATB buffers: processed = %d", _satb_buffers_processed); |
3780 |
gclog_or_tty->print_cr(" Steals: attempts = %d, successes = %d", |
|
3781 |
_steal_attempts, _steals); |
|
3782 |
gclog_or_tty->print_cr(" Aborted: %d, due to", _aborted); |
|
3783 |
gclog_or_tty->print_cr(" overflow: %d, global abort: %d, yield: %d", |
|
3784 |
_aborted_overflow, _aborted_cm_aborted, _aborted_yield); |
|
3785 |
gclog_or_tty->print_cr(" time out: %d, SATB: %d, termination: %d", |
|
3786 |
_aborted_timed_out, _aborted_satb, _aborted_termination); |
|
3787 |
#endif // _MARKING_STATS_ |
|
3788 |
} |
|
3789 |
||
3790 |
/***************************************************************************** |
|
3791 |
||
3792 |
The do_marking_step(time_target_ms) method is the building block |
|
3793 |
of the parallel marking framework. It can be called in parallel |
|
3794 |
with other invocations of do_marking_step() on different tasks |
|
3795 |
(but only one per task, obviously) and concurrently with the |
|
3796 |
mutator threads, or during remark, hence it eliminates the need |
|
3797 |
for two versions of the code. When called during remark, it will |
|
3798 |
pick up from where the task left off during the concurrent marking |
|
3799 |
phase. Interestingly, tasks are also claimable during evacuation |
|
3800 |
pauses too, since do_marking_step() ensures that it aborts before |
|
3801 |
it needs to yield. |
|
3802 |
||
3803 |
The data structures that is uses to do marking work are the |
|
3804 |
following: |
|
3805 |
||
3806 |
(1) Marking Bitmap. If there are gray objects that appear only |
|
3807 |
on the bitmap (this happens either when dealing with an overflow |
|
3808 |
or when the initial marking phase has simply marked the roots |
|
3809 |
and didn't push them on the stack), then tasks claim heap |
|
3810 |
regions whose bitmap they then scan to find gray objects. A |
|
3811 |
global finger indicates where the end of the last claimed region |
|
3812 |
is. A local finger indicates how far into the region a task has |
|
3813 |
scanned. The two fingers are used to determine how to gray an |
|
3814 |
object (i.e. whether simply marking it is OK, as it will be |
|
3815 |
visited by a task in the future, or whether it needs to be also |
|
3816 |
pushed on a stack). |
|
3817 |
||
3818 |
(2) Local Queue. The local queue of the task which is accessed |
|
3819 |
reasonably efficiently by the task. Other tasks can steal from |
|
3820 |
it when they run out of work. Throughout the marking phase, a |
|
3821 |
task attempts to keep its local queue short but not totally |
|
3822 |
empty, so that entries are available for stealing by other |
|
3823 |
tasks. Only when there is no more work, a task will totally |
|
3824 |
drain its local queue. |
|
3825 |
||
3826 |
(3) Global Mark Stack. This handles local queue overflow. During |
|
3827 |
marking only sets of entries are moved between it and the local |
|
3828 |
queues, as access to it requires a mutex and more fine-grain |
|
3829 |
interaction with it which might cause contention. If it |
|
3830 |
overflows, then the marking phase should restart and iterate |
|
3831 |
over the bitmap to identify gray objects. Throughout the marking |
|
3832 |
phase, tasks attempt to keep the global mark stack at a small |
|
3833 |
length but not totally empty, so that entries are available for |
|
3834 |
popping by other tasks. Only when there is no more work, tasks |
|
3835 |
will totally drain the global mark stack. |
|
3836 |
||
12272
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3837 |
(4) SATB Buffer Queue. This is where completed SATB buffers are |
1374 | 3838 |
made available. Buffers are regularly removed from this queue |
3839 |
and scanned for roots, so that the queue doesn't get too |
|
3840 |
long. During remark, all completed buffers are processed, as |
|
3841 |
well as the filled in parts of any uncompleted buffers. |
|
3842 |
||
3843 |
The do_marking_step() method tries to abort when the time target |
|
3844 |
has been reached. There are a few other cases when the |
|
3845 |
do_marking_step() method also aborts: |
|
3846 |
||
3847 |
(1) When the marking phase has been aborted (after a Full GC). |
|
3848 |
||
12272
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3849 |
(2) When a global overflow (on the global stack) has been |
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3850 |
triggered. Before the task aborts, it will actually sync up with |
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3851 |
the other tasks to ensure that all the marking data structures |
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3852 |
(local queues, stacks, fingers etc.) are re-initialised so that |
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3853 |
when do_marking_step() completes, the marking phase can |
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3854 |
immediately restart. |
1374 | 3855 |
|
3856 |
(3) When enough completed SATB buffers are available. The |
|
3857 |
do_marking_step() method only tries to drain SATB buffers right |
|
3858 |
at the beginning. So, if enough buffers are available, the |
|
3859 |
marking step aborts and the SATB buffers are processed at |
|
3860 |
the beginning of the next invocation. |
|
3861 |
||
3862 |
(4) To yield. when we have to yield then we abort and yield |
|
3863 |
right at the end of do_marking_step(). This saves us from a lot |
|
3864 |
of hassle as, by yielding we might allow a Full GC. If this |
|
3865 |
happens then objects will be compacted underneath our feet, the |
|
3866 |
heap might shrink, etc. We save checking for this by just |
|
3867 |
aborting and doing the yield right at the end. |
|
3868 |
||
3869 |
From the above it follows that the do_marking_step() method should |
|
3870 |
be called in a loop (or, otherwise, regularly) until it completes. |
|
3871 |
||
3872 |
If a marking step completes without its has_aborted() flag being |
|
3873 |
true, it means it has completed the current marking phase (and |
|
3874 |
also all other marking tasks have done so and have all synced up). |
|
3875 |
||
3876 |
A method called regular_clock_call() is invoked "regularly" (in |
|
3877 |
sub ms intervals) throughout marking. It is this clock method that |
|
3878 |
checks all the abort conditions which were mentioned above and |
|
3879 |
decides when the task should abort. A work-based scheme is used to |
|
3880 |
trigger this clock method: when the number of object words the |
|
3881 |
marking phase has scanned or the number of references the marking |
|
3882 |
phase has visited reach a given limit. Additional invocations to |
|
3883 |
the method clock have been planted in a few other strategic places |
|
3884 |
too. The initial reason for the clock method was to avoid calling |
|
3885 |
vtime too regularly, as it is quite expensive. So, once it was in |
|
3886 |
place, it was natural to piggy-back all the other conditions on it |
|
3887 |
too and not constantly check them throughout the code. |
|
3888 |
||
3889 |
*****************************************************************************/ |
|
3890 |
||
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
3891 |
void CMTask::do_marking_step(double time_target_ms, |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
3892 |
bool do_stealing, |
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
3893 |
bool do_termination) { |
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3894 |
assert(time_target_ms >= 1.0, "minimum granularity is 1ms"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3895 |
assert(concurrent() == _cm->concurrent(), "they should be the same"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3896 |
|
1374 | 3897 |
G1CollectorPolicy* g1_policy = _g1h->g1_policy(); |
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3898 |
assert(_task_queues != NULL, "invariant"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3899 |
assert(_task_queue != NULL, "invariant"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3900 |
assert(_task_queues->queue(_task_id) == _task_queue, "invariant"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3901 |
|
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3902 |
assert(!_claimed, |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3903 |
"only one thread should claim this task at any one time"); |
1374 | 3904 |
|
3905 |
// OK, this doesn't safeguard again all possible scenarios, as it is |
|
3906 |
// possible for two threads to set the _claimed flag at the same |
|
3907 |
// time. But it is only for debugging purposes anyway and it will |
|
3908 |
// catch most problems. |
|
3909 |
_claimed = true; |
|
3910 |
||
3911 |
_start_time_ms = os::elapsedVTime() * 1000.0; |
|
3912 |
statsOnly( _interval_start_time_ms = _start_time_ms ); |
|
3913 |
||
3914 |
double diff_prediction_ms = |
|
3915 |
g1_policy->get_new_prediction(&_marking_step_diffs_ms); |
|
3916 |
_time_target_ms = time_target_ms - diff_prediction_ms; |
|
3917 |
||
3918 |
// set up the variables that are used in the work-based scheme to |
|
3919 |
// call the regular clock method |
|
3920 |
_words_scanned = 0; |
|
3921 |
_refs_reached = 0; |
|
3922 |
recalculate_limits(); |
|
3923 |
||
3924 |
// clear all flags |
|
3925 |
clear_has_aborted(); |
|
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
3926 |
_has_timed_out = false; |
1374 | 3927 |
_draining_satb_buffers = false; |
3928 |
||
3929 |
++_calls; |
|
3930 |
||
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3931 |
if (_cm->verbose_low()) { |
1374 | 3932 |
gclog_or_tty->print_cr("[%d] >>>>>>>>>> START, call = %d, " |
3933 |
"target = %1.2lfms >>>>>>>>>>", |
|
3934 |
_task_id, _calls, _time_target_ms); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3935 |
} |
1374 | 3936 |
|
3937 |
// Set up the bitmap and oop closures. Anything that uses them is |
|
3938 |
// eventually called from this method, so it is OK to allocate these |
|
3939 |
// statically. |
|
3940 |
CMBitMapClosure bitmap_closure(this, _cm, _nextMarkBitMap); |
|
9994 | 3941 |
G1CMOopClosure cm_oop_closure(_g1h, _cm, this); |
3942 |
set_cm_oop_closure(&cm_oop_closure); |
|
1374 | 3943 |
|
3944 |
if (_cm->has_overflown()) { |
|
12272
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3945 |
// This can happen if the mark stack overflows during a GC pause |
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3946 |
// and this task, after a yield point, restarts. We have to abort |
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3947 |
// as we need to get into the overflow protocol which happens |
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3948 |
// right at the end of this task. |
1374 | 3949 |
set_has_aborted(); |
3950 |
} |
|
3951 |
||
3952 |
// First drain any available SATB buffers. After this, we will not |
|
3953 |
// look at SATB buffers before the next invocation of this method. |
|
3954 |
// If enough completed SATB buffers are queued up, the regular clock |
|
3955 |
// will abort this task so that it restarts. |
|
3956 |
drain_satb_buffers(); |
|
3957 |
// ...then partially drain the local queue and the global stack |
|
3958 |
drain_local_queue(true); |
|
3959 |
drain_global_stack(true); |
|
3960 |
||
3961 |
do { |
|
3962 |
if (!has_aborted() && _curr_region != NULL) { |
|
3963 |
// This means that we're already holding on to a region. |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3964 |
assert(_finger != NULL, "if region is not NULL, then the finger " |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3965 |
"should not be NULL either"); |
1374 | 3966 |
|
3967 |
// We might have restarted this task after an evacuation pause |
|
3968 |
// which might have evacuated the region we're holding on to |
|
3969 |
// underneath our feet. Let's read its limit again to make sure |
|
3970 |
// that we do not iterate over a region of the heap that |
|
3971 |
// contains garbage (update_region_limit() will also move |
|
3972 |
// _finger to the start of the region if it is found empty). |
|
3973 |
update_region_limit(); |
|
3974 |
// We will start from _finger not from the start of the region, |
|
3975 |
// as we might be restarting this task after aborting half-way |
|
3976 |
// through scanning this region. In this case, _finger points to |
|
3977 |
// the address where we last found a marked object. If this is a |
|
3978 |
// fresh region, _finger points to start(). |
|
3979 |
MemRegion mr = MemRegion(_finger, _region_limit); |
|
3980 |
||
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3981 |
if (_cm->verbose_low()) { |
1374 | 3982 |
gclog_or_tty->print_cr("[%d] we're scanning part " |
3983 |
"["PTR_FORMAT", "PTR_FORMAT") " |
|
3984 |
"of region "PTR_FORMAT, |
|
3985 |
_task_id, _finger, _region_limit, _curr_region); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
3986 |
} |
1374 | 3987 |
|
3988 |
// Let's iterate over the bitmap of the part of the |
|
3989 |
// region that is left. |
|
12272
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
3990 |
if (mr.is_empty() || _nextMarkBitMap->iterate(&bitmap_closure, mr)) { |
1374 | 3991 |
// We successfully completed iterating over the region. Now, |
3992 |
// let's give up the region. |
|
3993 |
giveup_current_region(); |
|
3994 |
regular_clock_call(); |
|
3995 |
} else { |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
3996 |
assert(has_aborted(), "currently the only way to do so"); |
1374 | 3997 |
// The only way to abort the bitmap iteration is to return |
3998 |
// false from the do_bit() method. However, inside the |
|
3999 |
// do_bit() method we move the _finger to point to the |
|
4000 |
// object currently being looked at. So, if we bail out, we |
|
4001 |
// have definitely set _finger to something non-null. |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4002 |
assert(_finger != NULL, "invariant"); |
1374 | 4003 |
|
4004 |
// Region iteration was actually aborted. So now _finger |
|
4005 |
// points to the address of the object we last scanned. If we |
|
4006 |
// leave it there, when we restart this task, we will rescan |
|
4007 |
// the object. It is easy to avoid this. We move the finger by |
|
4008 |
// enough to point to the next possible object header (the |
|
4009 |
// bitmap knows by how much we need to move it as it knows its |
|
4010 |
// granularity). |
|
5079
c8e827e5dc2b
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
5035
diff
changeset
|
4011 |
assert(_finger < _region_limit, "invariant"); |
c8e827e5dc2b
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
5035
diff
changeset
|
4012 |
HeapWord* new_finger = _nextMarkBitMap->nextWord(_finger); |
c8e827e5dc2b
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
5035
diff
changeset
|
4013 |
// Check if bitmap iteration was aborted while scanning the last object |
c8e827e5dc2b
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
5035
diff
changeset
|
4014 |
if (new_finger >= _region_limit) { |
12272
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
4015 |
giveup_current_region(); |
5079
c8e827e5dc2b
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
5035
diff
changeset
|
4016 |
} else { |
12272
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
4017 |
move_finger_to(new_finger); |
5079
c8e827e5dc2b
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
5035
diff
changeset
|
4018 |
} |
1374 | 4019 |
} |
4020 |
} |
|
4021 |
// At this point we have either completed iterating over the |
|
4022 |
// region we were holding on to, or we have aborted. |
|
4023 |
||
4024 |
// We then partially drain the local queue and the global stack. |
|
4025 |
// (Do we really need this?) |
|
4026 |
drain_local_queue(true); |
|
4027 |
drain_global_stack(true); |
|
4028 |
||
4029 |
// Read the note on the claim_region() method on why it might |
|
4030 |
// return NULL with potentially more regions available for |
|
4031 |
// claiming and why we have to check out_of_regions() to determine |
|
4032 |
// whether we're done or not. |
|
4033 |
while (!has_aborted() && _curr_region == NULL && !_cm->out_of_regions()) { |
|
4034 |
// We are going to try to claim a new region. We should have |
|
4035 |
// given up on the previous one. |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4036 |
// Separated the asserts so that we know which one fires. |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4037 |
assert(_curr_region == NULL, "invariant"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4038 |
assert(_finger == NULL, "invariant"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4039 |
assert(_region_limit == NULL, "invariant"); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4040 |
if (_cm->verbose_low()) { |
1374 | 4041 |
gclog_or_tty->print_cr("[%d] trying to claim a new region", _task_id); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4042 |
} |
1374 | 4043 |
HeapRegion* claimed_region = _cm->claim_region(_task_id); |
4044 |
if (claimed_region != NULL) { |
|
4045 |
// Yes, we managed to claim one |
|
4046 |
statsOnly( ++_regions_claimed ); |
|
4047 |
||
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4048 |
if (_cm->verbose_low()) { |
1374 | 4049 |
gclog_or_tty->print_cr("[%d] we successfully claimed " |
4050 |
"region "PTR_FORMAT, |
|
4051 |
_task_id, claimed_region); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4052 |
} |
1374 | 4053 |
|
4054 |
setup_for_region(claimed_region); |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4055 |
assert(_curr_region == claimed_region, "invariant"); |
1374 | 4056 |
} |
4057 |
// It is important to call the regular clock here. It might take |
|
4058 |
// a while to claim a region if, for example, we hit a large |
|
4059 |
// block of empty regions. So we need to call the regular clock |
|
4060 |
// method once round the loop to make sure it's called |
|
4061 |
// frequently enough. |
|
4062 |
regular_clock_call(); |
|
4063 |
} |
|
4064 |
||
4065 |
if (!has_aborted() && _curr_region == NULL) { |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4066 |
assert(_cm->out_of_regions(), |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4067 |
"at this point we should be out of regions"); |
1374 | 4068 |
} |
4069 |
} while ( _curr_region != NULL && !has_aborted()); |
|
4070 |
||
4071 |
if (!has_aborted()) { |
|
4072 |
// We cannot check whether the global stack is empty, since other |
|
12272
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
4073 |
// tasks might be pushing objects to it concurrently. |
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4074 |
assert(_cm->out_of_regions(), |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4075 |
"at this point we should be out of regions"); |
1374 | 4076 |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4077 |
if (_cm->verbose_low()) { |
1374 | 4078 |
gclog_or_tty->print_cr("[%d] all regions claimed", _task_id); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4079 |
} |
1374 | 4080 |
|
4081 |
// Try to reduce the number of available SATB buffers so that |
|
4082 |
// remark has less work to do. |
|
4083 |
drain_satb_buffers(); |
|
4084 |
} |
|
4085 |
||
4086 |
// Since we've done everything else, we can now totally drain the |
|
4087 |
// local queue and global stack. |
|
4088 |
drain_local_queue(false); |
|
4089 |
drain_global_stack(false); |
|
4090 |
||
4091 |
// Attempt at work stealing from other task's queues. |
|
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
4092 |
if (do_stealing && !has_aborted()) { |
1374 | 4093 |
// We have not aborted. This means that we have finished all that |
4094 |
// we could. Let's try to do some stealing... |
|
4095 |
||
4096 |
// We cannot check whether the global stack is empty, since other |
|
12272
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
4097 |
// tasks might be pushing objects to it concurrently. |
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4098 |
assert(_cm->out_of_regions() && _task_queue->size() == 0, |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4099 |
"only way to reach here"); |
1374 | 4100 |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4101 |
if (_cm->verbose_low()) { |
1374 | 4102 |
gclog_or_tty->print_cr("[%d] starting to steal", _task_id); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4103 |
} |
1374 | 4104 |
|
4105 |
while (!has_aborted()) { |
|
4106 |
oop obj; |
|
4107 |
statsOnly( ++_steal_attempts ); |
|
4108 |
||
4109 |
if (_cm->try_stealing(_task_id, &_hash_seed, obj)) { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4110 |
if (_cm->verbose_medium()) { |
1374 | 4111 |
gclog_or_tty->print_cr("[%d] stolen "PTR_FORMAT" successfully", |
4112 |
_task_id, (void*) obj); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4113 |
} |
1374 | 4114 |
|
4115 |
statsOnly( ++_steals ); |
|
4116 |
||
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4117 |
assert(_nextMarkBitMap->isMarked((HeapWord*) obj), |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4118 |
"any stolen object should be marked"); |
1374 | 4119 |
scan_object(obj); |
4120 |
||
4121 |
// And since we're towards the end, let's totally drain the |
|
4122 |
// local queue and global stack. |
|
4123 |
drain_local_queue(false); |
|
4124 |
drain_global_stack(false); |
|
4125 |
} else { |
|
4126 |
break; |
|
4127 |
} |
|
4128 |
} |
|
4129 |
} |
|
4130 |
||
9417
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
4131 |
// If we are about to wrap up and go into termination, check if we |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
4132 |
// should raise the overflow flag. |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
4133 |
if (do_termination && !has_aborted()) { |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
4134 |
if (_cm->force_overflow()->should_force()) { |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
4135 |
_cm->set_has_overflown(); |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
4136 |
regular_clock_call(); |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
4137 |
} |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
4138 |
} |
6719a2e727c0
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
8931
diff
changeset
|
4139 |
|
1374 | 4140 |
// We still haven't aborted. Now, let's try to get into the |
4141 |
// termination protocol. |
|
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
4142 |
if (do_termination && !has_aborted()) { |
1374 | 4143 |
// We cannot check whether the global stack is empty, since other |
12272
f87fd1292095
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
11584
diff
changeset
|
4144 |
// tasks might be concurrently pushing objects on it. |
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4145 |
// Separated the asserts so that we know which one fires. |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4146 |
assert(_cm->out_of_regions(), "only way to reach here"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4147 |
assert(_task_queue->size() == 0, "only way to reach here"); |
1374 | 4148 |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4149 |
if (_cm->verbose_low()) { |
1374 | 4150 |
gclog_or_tty->print_cr("[%d] starting termination protocol", _task_id); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4151 |
} |
1374 | 4152 |
|
4153 |
_termination_start_time_ms = os::elapsedVTime() * 1000.0; |
|
4154 |
// The CMTask class also extends the TerminatorTerminator class, |
|
4155 |
// hence its should_exit_termination() method will also decide |
|
4156 |
// whether to exit the termination protocol or not. |
|
4157 |
bool finished = _cm->terminator()->offer_termination(this); |
|
4158 |
double termination_end_time_ms = os::elapsedVTime() * 1000.0; |
|
4159 |
_termination_time_ms += |
|
4160 |
termination_end_time_ms - _termination_start_time_ms; |
|
4161 |
||
4162 |
if (finished) { |
|
4163 |
// We're all done. |
|
4164 |
||
4165 |
if (_task_id == 0) { |
|
4166 |
// let's allow task 0 to do this |
|
4167 |
if (concurrent()) { |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4168 |
assert(_cm->concurrent_marking_in_progress(), "invariant"); |
1374 | 4169 |
// we need to set this to false before the next |
4170 |
// safepoint. This way we ensure that the marking phase |
|
4171 |
// doesn't observe any more heap expansions. |
|
4172 |
_cm->clear_concurrent_marking_in_progress(); |
|
4173 |
} |
|
4174 |
} |
|
4175 |
||
4176 |
// We can now guarantee that the global stack is empty, since |
|
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4177 |
// all other tasks have finished. We separated the guarantees so |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4178 |
// that, if a condition is false, we can immediately find out |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4179 |
// which one. |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4180 |
guarantee(_cm->out_of_regions(), "only way to reach here"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4181 |
guarantee(_cm->mark_stack_empty(), "only way to reach here"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4182 |
guarantee(_task_queue->size() == 0, "only way to reach here"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4183 |
guarantee(!_cm->has_overflown(), "only way to reach here"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4184 |
guarantee(!_cm->mark_stack_overflow(), "only way to reach here"); |
1374 | 4185 |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4186 |
if (_cm->verbose_low()) { |
1374 | 4187 |
gclog_or_tty->print_cr("[%d] all tasks terminated", _task_id); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4188 |
} |
1374 | 4189 |
} else { |
4190 |
// Apparently there's more work to do. Let's abort this task. It |
|
4191 |
// will restart it and we can hopefully find more things to do. |
|
4192 |
||
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4193 |
if (_cm->verbose_low()) { |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4194 |
gclog_or_tty->print_cr("[%d] apparently there is more work to do", |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4195 |
_task_id); |
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4196 |
} |
1374 | 4197 |
|
4198 |
set_has_aborted(); |
|
4199 |
statsOnly( ++_aborted_termination ); |
|
4200 |
} |
|
4201 |
} |
|
4202 |
||
4203 |
// Mainly for debugging purposes to make sure that a pointer to the |
|
4204 |
// closure which was statically allocated in this frame doesn't |
|
4205 |
// escape it by accident. |
|
9994 | 4206 |
set_cm_oop_closure(NULL); |
1374 | 4207 |
double end_time_ms = os::elapsedVTime() * 1000.0; |
4208 |
double elapsed_time_ms = end_time_ms - _start_time_ms; |
|
4209 |
// Update the step history. |
|
4210 |
_step_times_ms.add(elapsed_time_ms); |
|
4211 |
||
4212 |
if (has_aborted()) { |
|
4213 |
// The task was aborted for some reason. |
|
4214 |
||
4215 |
statsOnly( ++_aborted ); |
|
4216 |
||
8073
a14dc27842dc
6608385: G1: need to support parallel reference processing
johnc
parents:
7923
diff
changeset
|
4217 |
if (_has_timed_out) { |
1374 | 4218 |
double diff_ms = elapsed_time_ms - _time_target_ms; |
4219 |
// Keep statistics of how well we did with respect to hitting |
|
4220 |
// our target only if we actually timed out (if we aborted for |
|
4221 |
// other reasons, then the results might get skewed). |
|
4222 |
_marking_step_diffs_ms.add(diff_ms); |
|
4223 |
} |
|
4224 |
||
4225 |
if (_cm->has_overflown()) { |
|
4226 |
// This is the interesting one. We aborted because a global |
|
4227 |
// overflow was raised. This means we have to restart the |
|
4228 |
// marking phase and start iterating over regions. However, in |
|
4229 |
// order to do this we have to make sure that all tasks stop |
|
4230 |
// what they are doing and re-initialise in a safe manner. We |
|
4231 |
// will achieve this with the use of two barrier sync points. |
|
4232 |
||
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4233 |
if (_cm->verbose_low()) { |
1374 | 4234 |
gclog_or_tty->print_cr("[%d] detected overflow", _task_id); |
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4235 |
} |
1374 | 4236 |
|
4237 |
_cm->enter_first_sync_barrier(_task_id); |
|
4238 |
// When we exit this sync barrier we know that all tasks have |
|
4239 |
// stopped doing marking work. So, it's now safe to |
|
4240 |
// re-initialise our data structures. At the end of this method, |
|
4241 |
// task 0 will clear the global data structures. |
|
4242 |
||
4243 |
statsOnly( ++_aborted_overflow ); |
|
4244 |
||
4245 |
// We clear the local state of this task... |
|
4246 |
clear_region_fields(); |
|
4247 |
||
4248 |
// ...and enter the second barrier. |
|
4249 |
_cm->enter_second_sync_barrier(_task_id); |
|
4250 |
// At this point everything has bee re-initialised and we're |
|
4251 |
// ready to restart. |
|
4252 |
} |
|
4253 |
||
4254 |
if (_cm->verbose_low()) { |
|
4255 |
gclog_or_tty->print_cr("[%d] <<<<<<<<<< ABORTING, target = %1.2lfms, " |
|
4256 |
"elapsed = %1.2lfms <<<<<<<<<<", |
|
4257 |
_task_id, _time_target_ms, elapsed_time_ms); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4258 |
if (_cm->has_aborted()) { |
1374 | 4259 |
gclog_or_tty->print_cr("[%d] ========== MARKING ABORTED ==========", |
4260 |
_task_id); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4261 |
} |
1374 | 4262 |
} |
4263 |
} else { |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4264 |
if (_cm->verbose_low()) { |
1374 | 4265 |
gclog_or_tty->print_cr("[%d] <<<<<<<<<< FINISHED, target = %1.2lfms, " |
4266 |
"elapsed = %1.2lfms <<<<<<<<<<", |
|
4267 |
_task_id, _time_target_ms, elapsed_time_ms); |
|
9999
5f0b78217054
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
9995
diff
changeset
|
4268 |
} |
1374 | 4269 |
} |
4270 |
||
4271 |
_claimed = false; |
|
4272 |
} |
|
4273 |
||
4274 |
CMTask::CMTask(int task_id, |
|
4275 |
ConcurrentMark* cm, |
|
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
4276 |
size_t* marked_bytes, |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
4277 |
BitMap* card_bm, |
1374 | 4278 |
CMTaskQueue* task_queue, |
4279 |
CMTaskQueueSet* task_queues) |
|
4280 |
: _g1h(G1CollectedHeap::heap()), |
|
4281 |
_task_id(task_id), _cm(cm), |
|
4282 |
_claimed(false), |
|
4283 |
_nextMarkBitMap(NULL), _hash_seed(17), |
|
4284 |
_task_queue(task_queue), |
|
4285 |
_task_queues(task_queues), |
|
9994 | 4286 |
_cm_oop_closure(NULL), |
11583
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
4287 |
_marked_bytes_array(marked_bytes), |
83a7383de44c
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
11577
diff
changeset
|
4288 |
_card_bm(card_bm) { |
4026
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4289 |
guarantee(task_queue != NULL, "invariant"); |
10386ea70fe5
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
4025
diff
changeset
|
4290 |
guarantee(task_queues != NULL, "invariant"); |
1374 | 4291 |
|
4292 |
statsOnly( _clock_due_to_scanning = 0; |
|
4293 |
_clock_due_to_marking = 0 ); |
|
4294 |
||
4295 |
_marking_step_diffs_ms.add(0.5); |
|
4296 |
} |
|
8930
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4297 |
|
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4298 |
// These are formatting macros that are used below to ensure |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4299 |
// consistent formatting. The *_H_* versions are used to format the |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4300 |
// header for a particular value and they should be kept consistent |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4301 |
// with the corresponding macro. Also note that most of the macros add |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4302 |
// the necessary white space (as a prefix) which makes them a bit |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4303 |
// easier to compose. |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4304 |
|
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4305 |
// All the output lines are prefixed with this string to be able to |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4306 |
// identify them easily in a large log file. |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4307 |
#define G1PPRL_LINE_PREFIX "###" |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4308 |
|
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4309 |
#define G1PPRL_ADDR_BASE_FORMAT " "PTR_FORMAT"-"PTR_FORMAT |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4310 |
#ifdef _LP64 |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4311 |
#define G1PPRL_ADDR_BASE_H_FORMAT " %37s" |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4312 |
#else // _LP64 |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4313 |
#define G1PPRL_ADDR_BASE_H_FORMAT " %21s" |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4314 |
#endif // _LP64 |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4315 |
|
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4316 |
// For per-region info |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4317 |
#define G1PPRL_TYPE_FORMAT " %-4s" |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4318 |
#define G1PPRL_TYPE_H_FORMAT " %4s" |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4319 |
#define G1PPRL_BYTE_FORMAT " "SIZE_FORMAT_W(9) |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4320 |
#define G1PPRL_BYTE_H_FORMAT " %9s" |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4321 |
#define G1PPRL_DOUBLE_FORMAT " %14.1f" |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4322 |
#define G1PPRL_DOUBLE_H_FORMAT " %14s" |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4323 |
|
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4324 |
// For summary info |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4325 |
#define G1PPRL_SUM_ADDR_FORMAT(tag) " "tag":"G1PPRL_ADDR_BASE_FORMAT |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4326 |
#define G1PPRL_SUM_BYTE_FORMAT(tag) " "tag": "SIZE_FORMAT |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4327 |
#define G1PPRL_SUM_MB_FORMAT(tag) " "tag": %1.2f MB" |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4328 |
#define G1PPRL_SUM_MB_PERC_FORMAT(tag) G1PPRL_SUM_MB_FORMAT(tag)" / %1.2f %%" |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4329 |
|
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4330 |
G1PrintRegionLivenessInfoClosure:: |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4331 |
G1PrintRegionLivenessInfoClosure(outputStream* out, const char* phase_name) |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4332 |
: _out(out), |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4333 |
_total_used_bytes(0), _total_capacity_bytes(0), |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4334 |
_total_prev_live_bytes(0), _total_next_live_bytes(0), |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4335 |
_hum_used_bytes(0), _hum_capacity_bytes(0), |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4336 |
_hum_prev_live_bytes(0), _hum_next_live_bytes(0) { |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4337 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4338 |
MemRegion g1_committed = g1h->g1_committed(); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4339 |
MemRegion g1_reserved = g1h->g1_reserved(); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4340 |
double now = os::elapsedTime(); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4341 |
|
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4342 |
// Print the header of the output. |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4343 |
_out->cr(); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4344 |
_out->print_cr(G1PPRL_LINE_PREFIX" PHASE %s @ %1.3f", phase_name, now); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4345 |
_out->print_cr(G1PPRL_LINE_PREFIX" HEAP" |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4346 |
G1PPRL_SUM_ADDR_FORMAT("committed") |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4347 |
G1PPRL_SUM_ADDR_FORMAT("reserved") |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4348 |
G1PPRL_SUM_BYTE_FORMAT("region-size"), |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4349 |
g1_committed.start(), g1_committed.end(), |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4350 |
g1_reserved.start(), g1_reserved.end(), |
10677
370a8da2d63f
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
10670
diff
changeset
|
4351 |
HeapRegion::GrainBytes); |
8930
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4352 |
_out->print_cr(G1PPRL_LINE_PREFIX); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4353 |
_out->print_cr(G1PPRL_LINE_PREFIX |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4354 |
G1PPRL_TYPE_H_FORMAT |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4355 |
G1PPRL_ADDR_BASE_H_FORMAT |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4356 |
G1PPRL_BYTE_H_FORMAT |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4357 |
G1PPRL_BYTE_H_FORMAT |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4358 |
G1PPRL_BYTE_H_FORMAT |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4359 |
G1PPRL_DOUBLE_H_FORMAT, |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4360 |
"type", "address-range", |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4361 |
"used", "prev-live", "next-live", "gc-eff"); |
10668
1070b189c76e
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
10666
diff
changeset
|
4362 |
_out->print_cr(G1PPRL_LINE_PREFIX |
1070b189c76e
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
10666
diff
changeset
|
4363 |
G1PPRL_TYPE_H_FORMAT |
1070b189c76e
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
10666
diff
changeset
|
4364 |
G1PPRL_ADDR_BASE_H_FORMAT |
1070b189c76e
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
10666
diff
changeset
|
4365 |
G1PPRL_BYTE_H_FORMAT |
1070b189c76e
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
10666
diff
changeset
|
4366 |
G1PPRL_BYTE_H_FORMAT |
1070b189c76e
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
10666
diff
changeset
|
4367 |
G1PPRL_BYTE_H_FORMAT |
1070b189c76e
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
10666
diff
changeset
|
4368 |
G1PPRL_DOUBLE_H_FORMAT, |
1070b189c76e
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
10666
diff
changeset
|
4369 |
"", "", |
1070b189c76e
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
10666
diff
changeset
|
4370 |
"(bytes)", "(bytes)", "(bytes)", "(bytes/ms)"); |
8930
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4371 |
} |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4372 |
|
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4373 |
// It takes as a parameter a reference to one of the _hum_* fields, it |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
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diff
changeset
|
4374 |
// deduces the corresponding value for a region in a humongous region |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4375 |
// series (either the region size, or what's left if the _hum_* field |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4376 |
// is < the region size), and updates the _hum_* field accordingly. |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4377 |
size_t G1PrintRegionLivenessInfoClosure::get_hum_bytes(size_t* hum_bytes) { |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4378 |
size_t bytes = 0; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4379 |
// The > 0 check is to deal with the prev and next live bytes which |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4380 |
// could be 0. |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4381 |
if (*hum_bytes > 0) { |
10677
370a8da2d63f
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
10670
diff
changeset
|
4382 |
bytes = MIN2(HeapRegion::GrainBytes, *hum_bytes); |
8930
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4383 |
*hum_bytes -= bytes; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4384 |
} |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4385 |
return bytes; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4386 |
} |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4387 |
|
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4388 |
// It deduces the values for a region in a humongous region series |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4389 |
// from the _hum_* fields and updates those accordingly. It assumes |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4390 |
// that that _hum_* fields have already been set up from the "starts |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
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diff
changeset
|
4391 |
// humongous" region and we visit the regions in address order. |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4392 |
void G1PrintRegionLivenessInfoClosure::get_hum_bytes(size_t* used_bytes, |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4393 |
size_t* capacity_bytes, |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4394 |
size_t* prev_live_bytes, |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4395 |
size_t* next_live_bytes) { |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4396 |
assert(_hum_used_bytes > 0 && _hum_capacity_bytes > 0, "pre-condition"); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4397 |
*used_bytes = get_hum_bytes(&_hum_used_bytes); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4398 |
*capacity_bytes = get_hum_bytes(&_hum_capacity_bytes); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4399 |
*prev_live_bytes = get_hum_bytes(&_hum_prev_live_bytes); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4400 |
*next_live_bytes = get_hum_bytes(&_hum_next_live_bytes); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4401 |
} |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4402 |
|
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4403 |
bool G1PrintRegionLivenessInfoClosure::doHeapRegion(HeapRegion* r) { |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4404 |
const char* type = ""; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4405 |
HeapWord* bottom = r->bottom(); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4406 |
HeapWord* end = r->end(); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4407 |
size_t capacity_bytes = r->capacity(); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4408 |
size_t used_bytes = r->used(); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4409 |
size_t prev_live_bytes = r->live_bytes(); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4410 |
size_t next_live_bytes = r->next_live_bytes(); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4411 |
double gc_eff = r->gc_efficiency(); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4412 |
if (r->used() == 0) { |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4413 |
type = "FREE"; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4414 |
} else if (r->is_survivor()) { |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4415 |
type = "SURV"; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4416 |
} else if (r->is_young()) { |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4417 |
type = "EDEN"; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4418 |
} else if (r->startsHumongous()) { |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4419 |
type = "HUMS"; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4420 |
|
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4421 |
assert(_hum_used_bytes == 0 && _hum_capacity_bytes == 0 && |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4422 |
_hum_prev_live_bytes == 0 && _hum_next_live_bytes == 0, |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4423 |
"they should have been zeroed after the last time we used them"); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4424 |
// Set up the _hum_* fields. |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4425 |
_hum_capacity_bytes = capacity_bytes; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4426 |
_hum_used_bytes = used_bytes; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4427 |
_hum_prev_live_bytes = prev_live_bytes; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4428 |
_hum_next_live_bytes = next_live_bytes; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4429 |
get_hum_bytes(&used_bytes, &capacity_bytes, |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4430 |
&prev_live_bytes, &next_live_bytes); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4431 |
end = bottom + HeapRegion::GrainWords; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4432 |
} else if (r->continuesHumongous()) { |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4433 |
type = "HUMC"; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4434 |
get_hum_bytes(&used_bytes, &capacity_bytes, |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4435 |
&prev_live_bytes, &next_live_bytes); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4436 |
assert(end == bottom + HeapRegion::GrainWords, "invariant"); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4437 |
} else { |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4438 |
type = "OLD"; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4439 |
} |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4440 |
|
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4441 |
_total_used_bytes += used_bytes; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4442 |
_total_capacity_bytes += capacity_bytes; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4443 |
_total_prev_live_bytes += prev_live_bytes; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4444 |
_total_next_live_bytes += next_live_bytes; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4445 |
|
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4446 |
// Print a line for this particular region. |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4447 |
_out->print_cr(G1PPRL_LINE_PREFIX |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4448 |
G1PPRL_TYPE_FORMAT |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4449 |
G1PPRL_ADDR_BASE_FORMAT |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4450 |
G1PPRL_BYTE_FORMAT |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4451 |
G1PPRL_BYTE_FORMAT |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4452 |
G1PPRL_BYTE_FORMAT |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4453 |
G1PPRL_DOUBLE_FORMAT, |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4454 |
type, bottom, end, |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4455 |
used_bytes, prev_live_bytes, next_live_bytes, gc_eff); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4456 |
|
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4457 |
return false; |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4458 |
} |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4459 |
|
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4460 |
G1PrintRegionLivenessInfoClosure::~G1PrintRegionLivenessInfoClosure() { |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4461 |
// Print the footer of the output. |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4462 |
_out->print_cr(G1PPRL_LINE_PREFIX); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4463 |
_out->print_cr(G1PPRL_LINE_PREFIX |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4464 |
" SUMMARY" |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4465 |
G1PPRL_SUM_MB_FORMAT("capacity") |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4466 |
G1PPRL_SUM_MB_PERC_FORMAT("used") |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4467 |
G1PPRL_SUM_MB_PERC_FORMAT("prev-live") |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4468 |
G1PPRL_SUM_MB_PERC_FORMAT("next-live"), |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4469 |
bytes_to_mb(_total_capacity_bytes), |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4470 |
bytes_to_mb(_total_used_bytes), |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4471 |
perc(_total_used_bytes, _total_capacity_bytes), |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4472 |
bytes_to_mb(_total_prev_live_bytes), |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4473 |
perc(_total_prev_live_bytes, _total_capacity_bytes), |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4474 |
bytes_to_mb(_total_next_live_bytes), |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4475 |
perc(_total_next_live_bytes, _total_capacity_bytes)); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4476 |
_out->cr(); |
52368505ee8e
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
8688
diff
changeset
|
4477 |
} |