author | brutisso |
Fri, 27 Mar 2015 09:28:47 +0100 | |
changeset 29795 | 984c5c379c6a |
parent 29580 | a67a581cfe11 |
child 29796 | 7a04e5c250d1 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2001, 2015, 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 "gc_implementation/g1/concurrentG1Refine.hpp" |
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#include "gc_implementation/g1/g1BlockOffsetTable.inline.hpp" |
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#include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
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#include "gc_implementation/g1/heapRegionRemSet.hpp" |
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#include "gc_implementation/g1/heapRegionManager.inline.hpp" |
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#include "memory/allocation.hpp" |
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#include "memory/padded.inline.hpp" |
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#include "memory/space.inline.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "runtime/atomic.inline.hpp" |
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#include "utilities/bitMap.inline.hpp" |
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#include "utilities/globalDefinitions.hpp" |
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#include "utilities/growableArray.hpp" |
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PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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class PerRegionTable: public CHeapObj<mtGC> { |
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friend class OtherRegionsTable; |
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friend class HeapRegionRemSetIterator; |
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HeapRegion* _hr; |
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BitMap _bm; |
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jint _occupied; |
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// next pointer for free/allocated 'all' list |
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PerRegionTable* _next; |
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// prev pointer for the allocated 'all' list |
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PerRegionTable* _prev; |
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// next pointer in collision list |
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PerRegionTable * _collision_list_next; |
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// Global free list of PRTs |
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static PerRegionTable* _free_list; |
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protected: |
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// We need access in order to union things into the base table. |
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BitMap* bm() { return &_bm; } |
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void recount_occupied() { |
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_occupied = (jint) bm()->count_one_bits(); |
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} |
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PerRegionTable(HeapRegion* hr) : |
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_hr(hr), |
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_occupied(0), |
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_bm(HeapRegion::CardsPerRegion, false /* in-resource-area */), |
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_collision_list_next(NULL), _next(NULL), _prev(NULL) |
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{} |
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void add_card_work(CardIdx_t from_card, bool par) { |
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if (!_bm.at(from_card)) { |
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if (par) { |
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if (_bm.par_at_put(from_card, 1)) { |
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Atomic::inc(&_occupied); |
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} |
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} else { |
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_bm.at_put(from_card, 1); |
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_occupied++; |
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} |
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} |
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} |
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void add_reference_work(OopOrNarrowOopStar from, bool par) { |
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// Must make this robust in case "from" is not in "_hr", because of |
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// concurrency. |
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if (G1TraceHeapRegionRememberedSet) { |
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gclog_or_tty->print_cr(" PRT::Add_reference_work(" PTR_FORMAT "->" PTR_FORMAT").", |
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from, |
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UseCompressedOops |
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? (void *)oopDesc::load_decode_heap_oop((narrowOop*)from) |
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: (void *)oopDesc::load_decode_heap_oop((oop*)from)); |
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} |
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HeapRegion* loc_hr = hr(); |
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// If the test below fails, then this table was reused concurrently |
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// with this operation. This is OK, since the old table was coarsened, |
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// and adding a bit to the new table is never incorrect. |
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// If the table used to belong to a continues humongous region and is |
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// now reused for the corresponding start humongous region, we need to |
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// make sure that we detect this. Thus, we call is_in_reserved_raw() |
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// instead of just is_in_reserved() here. |
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if (loc_hr->is_in_reserved_raw(from)) { |
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size_t hw_offset = pointer_delta((HeapWord*)from, loc_hr->bottom()); |
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CardIdx_t from_card = (CardIdx_t) |
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hw_offset >> (CardTableModRefBS::card_shift - LogHeapWordSize); |
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assert(0 <= from_card && (size_t)from_card < HeapRegion::CardsPerRegion, |
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"Must be in range."); |
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add_card_work(from_card, par); |
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} |
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} |
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public: |
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HeapRegion* hr() const { return _hr; } |
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jint occupied() const { |
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// Overkill, but if we ever need it... |
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// guarantee(_occupied == _bm.count_one_bits(), "Check"); |
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return _occupied; |
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} |
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void init(HeapRegion* hr, bool clear_links_to_all_list) { |
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if (clear_links_to_all_list) { |
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set_next(NULL); |
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set_prev(NULL); |
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} |
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_hr = hr; |
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_collision_list_next = NULL; |
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_occupied = 0; |
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_bm.clear(); |
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} |
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void add_reference(OopOrNarrowOopStar from) { |
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add_reference_work(from, /*parallel*/ true); |
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} |
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void seq_add_reference(OopOrNarrowOopStar from) { |
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add_reference_work(from, /*parallel*/ false); |
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} |
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void scrub(CardTableModRefBS* ctbs, BitMap* card_bm) { |
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HeapWord* hr_bot = hr()->bottom(); |
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size_t hr_first_card_index = ctbs->index_for(hr_bot); |
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bm()->set_intersection_at_offset(*card_bm, hr_first_card_index); |
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recount_occupied(); |
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} |
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void add_card(CardIdx_t from_card_index) { |
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add_card_work(from_card_index, /*parallel*/ true); |
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} |
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void seq_add_card(CardIdx_t from_card_index) { |
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add_card_work(from_card_index, /*parallel*/ false); |
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} |
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// (Destructively) union the bitmap of the current table into the given |
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// bitmap (which is assumed to be of the same size.) |
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void union_bitmap_into(BitMap* bm) { |
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bm->set_union(_bm); |
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} |
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// Mem size in bytes. |
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size_t mem_size() const { |
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return sizeof(PerRegionTable) + _bm.size_in_words() * HeapWordSize; |
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} |
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// Requires "from" to be in "hr()". |
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bool contains_reference(OopOrNarrowOopStar from) const { |
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assert(hr()->is_in_reserved(from), "Precondition."); |
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size_t card_ind = pointer_delta(from, hr()->bottom(), |
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CardTableModRefBS::card_size); |
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return _bm.at(card_ind); |
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} |
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// Bulk-free the PRTs from prt to last, assumes that they are |
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// linked together using their _next field. |
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static void bulk_free(PerRegionTable* prt, PerRegionTable* last) { |
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while (true) { |
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PerRegionTable* fl = _free_list; |
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last->set_next(fl); |
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PerRegionTable* res = (PerRegionTable*) Atomic::cmpxchg_ptr(prt, &_free_list, fl); |
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if (res == fl) { |
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return; |
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} |
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} |
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ShouldNotReachHere(); |
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} |
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||
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static void free(PerRegionTable* prt) { |
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bulk_free(prt, prt); |
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} |
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// Returns an initialized PerRegionTable instance. |
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static PerRegionTable* alloc(HeapRegion* hr) { |
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PerRegionTable* fl = _free_list; |
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while (fl != NULL) { |
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PerRegionTable* nxt = fl->next(); |
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PerRegionTable* res = |
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(PerRegionTable*) |
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Atomic::cmpxchg_ptr(nxt, &_free_list, fl); |
210 |
if (res == fl) { |
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fl->init(hr, true); |
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return fl; |
213 |
} else { |
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fl = _free_list; |
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} |
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} |
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assert(fl == NULL, "Loop condition."); |
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return new PerRegionTable(hr); |
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} |
220 |
||
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PerRegionTable* next() const { return _next; } |
222 |
void set_next(PerRegionTable* next) { _next = next; } |
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223 |
PerRegionTable* prev() const { return _prev; } |
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void set_prev(PerRegionTable* prev) { _prev = prev; } |
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226 |
// Accessor and Modification routines for the pointer for the |
|
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// singly linked collision list that links the PRTs within the |
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// OtherRegionsTable::_fine_grain_regions hash table. |
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229 |
// |
|
230 |
// It might be useful to also make the collision list doubly linked |
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231 |
// to avoid iteration over the collisions list during scrubbing/deletion. |
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232 |
// OTOH there might not be many collisions. |
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233 |
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234 |
PerRegionTable* collision_list_next() const { |
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235 |
return _collision_list_next; |
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236 |
} |
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237 |
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238 |
void set_collision_list_next(PerRegionTable* next) { |
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239 |
_collision_list_next = next; |
|
240 |
} |
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241 |
||
242 |
PerRegionTable** collision_list_next_addr() { |
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243 |
return &_collision_list_next; |
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244 |
} |
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245 |
||
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static size_t fl_mem_size() { |
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PerRegionTable* cur = _free_list; |
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size_t res = 0; |
249 |
while (cur != NULL) { |
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res += cur->mem_size(); |
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cur = cur->next(); |
252 |
} |
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253 |
return res; |
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254 |
} |
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static void test_fl_mem_size(); |
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}; |
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PerRegionTable* PerRegionTable::_free_list = NULL; |
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|
261 |
size_t OtherRegionsTable::_max_fine_entries = 0; |
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262 |
size_t OtherRegionsTable::_mod_max_fine_entries_mask = 0; |
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263 |
size_t OtherRegionsTable::_fine_eviction_stride = 0; |
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264 |
size_t OtherRegionsTable::_fine_eviction_sample_size = 0; |
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OtherRegionsTable::OtherRegionsTable(HeapRegion* hr, Mutex* m) : |
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_g1h(G1CollectedHeap::heap()), |
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_hr(hr), _m(m), |
1374 | 269 |
_coarse_map(G1CollectedHeap::heap()->max_regions(), |
270 |
false /* in-resource-area */), |
|
271 |
_fine_grain_regions(NULL), |
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13335 | 272 |
_first_all_fine_prts(NULL), _last_all_fine_prts(NULL), |
1374 | 273 |
_n_fine_entries(0), _n_coarse_entries(0), |
274 |
_fine_eviction_start(0), |
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275 |
_sparse_table(hr) |
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276 |
{ |
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typedef PerRegionTable* PerRegionTablePtr; |
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278 |
|
1374 | 279 |
if (_max_fine_entries == 0) { |
280 |
assert(_mod_max_fine_entries_mask == 0, "Both or none."); |
|
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281 |
size_t max_entries_log = (size_t)log2_long((jlong)G1RSetRegionEntries); |
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282 |
_max_fine_entries = (size_t)1 << max_entries_log; |
1374 | 283 |
_mod_max_fine_entries_mask = _max_fine_entries - 1; |
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284 |
|
1374 | 285 |
assert(_fine_eviction_sample_size == 0 |
286 |
&& _fine_eviction_stride == 0, "All init at same time."); |
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287 |
_fine_eviction_sample_size = MAX2((size_t)4, max_entries_log); |
1374 | 288 |
_fine_eviction_stride = _max_fine_entries / _fine_eviction_sample_size; |
289 |
} |
|
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290 |
|
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291 |
_fine_grain_regions = NEW_C_HEAP_ARRAY3(PerRegionTablePtr, _max_fine_entries, |
25946 | 292 |
mtGC, CURRENT_PC, AllocFailStrategy::RETURN_NULL); |
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|
293 |
|
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|
294 |
if (_fine_grain_regions == NULL) { |
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295 |
vm_exit_out_of_memory(sizeof(void*)*_max_fine_entries, OOM_MALLOC_ERROR, |
1374 | 296 |
"Failed to allocate _fine_grain_entries."); |
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297 |
} |
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|
298 |
|
1374 | 299 |
for (size_t i = 0; i < _max_fine_entries; i++) { |
300 |
_fine_grain_regions[i] = NULL; |
|
301 |
} |
|
302 |
} |
|
303 |
||
13335 | 304 |
void OtherRegionsTable::link_to_all(PerRegionTable* prt) { |
305 |
// We always append to the beginning of the list for convenience; |
|
306 |
// the order of entries in this list does not matter. |
|
307 |
if (_first_all_fine_prts != NULL) { |
|
308 |
assert(_first_all_fine_prts->prev() == NULL, "invariant"); |
|
309 |
_first_all_fine_prts->set_prev(prt); |
|
310 |
prt->set_next(_first_all_fine_prts); |
|
311 |
} else { |
|
312 |
// this is the first element we insert. Adjust the "last" pointer |
|
313 |
_last_all_fine_prts = prt; |
|
314 |
assert(prt->next() == NULL, "just checking"); |
|
315 |
} |
|
316 |
// the new element is always the first element without a predecessor |
|
317 |
prt->set_prev(NULL); |
|
318 |
_first_all_fine_prts = prt; |
|
319 |
||
320 |
assert(prt->prev() == NULL, "just checking"); |
|
321 |
assert(_first_all_fine_prts == prt, "just checking"); |
|
322 |
assert((_first_all_fine_prts == NULL && _last_all_fine_prts == NULL) || |
|
323 |
(_first_all_fine_prts != NULL && _last_all_fine_prts != NULL), |
|
324 |
"just checking"); |
|
325 |
assert(_last_all_fine_prts == NULL || _last_all_fine_prts->next() == NULL, |
|
326 |
"just checking"); |
|
327 |
assert(_first_all_fine_prts == NULL || _first_all_fine_prts->prev() == NULL, |
|
328 |
"just checking"); |
|
329 |
} |
|
330 |
||
331 |
void OtherRegionsTable::unlink_from_all(PerRegionTable* prt) { |
|
332 |
if (prt->prev() != NULL) { |
|
333 |
assert(_first_all_fine_prts != prt, "just checking"); |
|
334 |
prt->prev()->set_next(prt->next()); |
|
335 |
// removing the last element in the list? |
|
336 |
if (_last_all_fine_prts == prt) { |
|
337 |
_last_all_fine_prts = prt->prev(); |
|
338 |
} |
|
339 |
} else { |
|
340 |
assert(_first_all_fine_prts == prt, "just checking"); |
|
341 |
_first_all_fine_prts = prt->next(); |
|
342 |
// list is empty now? |
|
343 |
if (_first_all_fine_prts == NULL) { |
|
344 |
_last_all_fine_prts = NULL; |
|
345 |
} |
|
346 |
} |
|
347 |
||
348 |
if (prt->next() != NULL) { |
|
349 |
prt->next()->set_prev(prt->prev()); |
|
350 |
} |
|
351 |
||
352 |
prt->set_next(NULL); |
|
353 |
prt->set_prev(NULL); |
|
354 |
||
355 |
assert((_first_all_fine_prts == NULL && _last_all_fine_prts == NULL) || |
|
356 |
(_first_all_fine_prts != NULL && _last_all_fine_prts != NULL), |
|
357 |
"just checking"); |
|
358 |
assert(_last_all_fine_prts == NULL || _last_all_fine_prts->next() == NULL, |
|
359 |
"just checking"); |
|
360 |
assert(_first_all_fine_prts == NULL || _first_all_fine_prts->prev() == NULL, |
|
361 |
"just checking"); |
|
362 |
} |
|
363 |
||
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364 |
int** FromCardCache::_cache = NULL; |
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|
365 |
uint FromCardCache::_max_regions = 0; |
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366 |
size_t FromCardCache::_static_mem_size = 0; |
1374 | 367 |
|
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|
368 |
void FromCardCache::initialize(uint n_par_rs, uint max_num_regions) { |
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|
369 |
guarantee(_cache == NULL, "Should not call this multiple times"); |
1374 | 370 |
|
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|
371 |
_max_regions = max_num_regions; |
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|
372 |
_cache = Padded2DArray<int, mtGC>::create_unfreeable(n_par_rs, |
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|
373 |
_max_regions, |
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|
374 |
&_static_mem_size); |
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|
375 |
|
26160 | 376 |
invalidate(0, _max_regions); |
1374 | 377 |
} |
378 |
||
26160 | 379 |
void FromCardCache::invalidate(uint start_idx, size_t new_num_regions) { |
380 |
guarantee((size_t)start_idx + new_num_regions <= max_uintx, |
|
381 |
err_msg("Trying to invalidate beyond maximum region, from %u size "SIZE_FORMAT, |
|
382 |
start_idx, new_num_regions)); |
|
23452
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|
383 |
for (uint i = 0; i < HeapRegionRemSet::num_par_rem_sets(); i++) { |
26160 | 384 |
uint end_idx = (start_idx + (uint)new_num_regions); |
385 |
assert(end_idx <= _max_regions, "Must be within max."); |
|
386 |
for (uint j = start_idx; j < end_idx; j++) { |
|
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|
387 |
set(i, j, InvalidCard); |
1374 | 388 |
} |
389 |
} |
|
390 |
} |
|
391 |
||
392 |
#ifndef PRODUCT |
|
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|
393 |
void FromCardCache::print(outputStream* out) { |
23452
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changeset
|
394 |
for (uint i = 0; i < HeapRegionRemSet::num_par_rem_sets(); i++) { |
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changeset
|
395 |
for (uint j = 0; j < _max_regions; j++) { |
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|
396 |
out->print_cr("_from_card_cache[%u][%u] = %d.", |
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changeset
|
397 |
i, j, at(i, j)); |
1374 | 398 |
} |
399 |
} |
|
400 |
} |
|
401 |
#endif |
|
402 |
||
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changeset
|
403 |
void FromCardCache::clear(uint region_idx) { |
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changeset
|
404 |
uint num_par_remsets = HeapRegionRemSet::num_par_rem_sets(); |
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changeset
|
405 |
for (uint i = 0; i < num_par_remsets; i++) { |
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changeset
|
406 |
set(i, region_idx, InvalidCard); |
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changeset
|
407 |
} |
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changeset
|
408 |
} |
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changeset
|
409 |
|
26850
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changeset
|
410 |
void OtherRegionsTable::add_reference(OopOrNarrowOopStar from, uint tid) { |
28030 | 411 |
uint cur_hrm_ind = _hr->hrm_index(); |
1374 | 412 |
|
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|
413 |
if (G1TraceHeapRegionRememberedSet) { |
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|
414 |
gclog_or_tty->print_cr("ORT::add_reference_work(" PTR_FORMAT "->" PTR_FORMAT ").", |
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changeset
|
415 |
from, |
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changeset
|
416 |
UseCompressedOops |
20282
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7195622: CheckUnhandledOops has limited usefulness now
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parents:
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changeset
|
417 |
? (void *)oopDesc::load_decode_heap_oop((narrowOop*)from) |
7f9cbdf89af2
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changeset
|
418 |
: (void *)oopDesc::load_decode_heap_oop((oop*)from)); |
13113
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changeset
|
419 |
} |
1374 | 420 |
|
421 |
int from_card = (int)(uintptr_t(from) >> CardTableModRefBS::card_shift); |
|
422 |
||
13113
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changeset
|
423 |
if (G1TraceHeapRegionRememberedSet) { |
23858
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changeset
|
424 |
gclog_or_tty->print_cr("Table for [" PTR_FORMAT "...): card %d (cache = %d)", |
28030 | 425 |
_hr->bottom(), from_card, |
26850
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diff
changeset
|
426 |
FromCardCache::at(tid, cur_hrm_ind)); |
13113
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changeset
|
427 |
} |
1374 | 428 |
|
26850
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diff
changeset
|
429 |
if (FromCardCache::contains_or_replace(tid, cur_hrm_ind, from_card)) { |
13113
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changeset
|
430 |
if (G1TraceHeapRegionRememberedSet) { |
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changeset
|
431 |
gclog_or_tty->print_cr(" from-card cache hit."); |
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changeset
|
432 |
} |
1374 | 433 |
assert(contains_reference(from), "We just added it!"); |
434 |
return; |
|
435 |
} |
|
436 |
||
437 |
// Note that this may be a continued H region. |
|
438 |
HeapRegion* from_hr = _g1h->heap_region_containing_raw(from); |
|
26424
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diff
changeset
|
439 |
RegionIdx_t from_hrm_ind = (RegionIdx_t) from_hr->hrm_index(); |
1374 | 440 |
|
441 |
// If the region is already coarsened, return. |
|
26424
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parents:
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diff
changeset
|
442 |
if (_coarse_map.at(from_hrm_ind)) { |
13113
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changeset
|
443 |
if (G1TraceHeapRegionRememberedSet) { |
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changeset
|
444 |
gclog_or_tty->print_cr(" coarse map hit."); |
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changeset
|
445 |
} |
1374 | 446 |
assert(contains_reference(from), "We just added it!"); |
447 |
return; |
|
448 |
} |
|
449 |
||
450 |
// Otherwise find a per-region table to add it to. |
|
26424
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tschatzl
parents:
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diff
changeset
|
451 |
size_t ind = from_hrm_ind & _mod_max_fine_entries_mask; |
13113
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changeset
|
452 |
PerRegionTable* prt = find_region_table(ind, from_hr); |
1374 | 453 |
if (prt == NULL) { |
23451
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8035406: Improve data structure for Code Cache remembered sets
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21563
diff
changeset
|
454 |
MutexLockerEx x(_m, Mutex::_no_safepoint_check_flag); |
1374 | 455 |
// Confirm that it's really not there... |
456 |
prt = find_region_table(ind, from_hr); |
|
457 |
if (prt == NULL) { |
|
458 |
||
459 |
uintptr_t from_hr_bot_card_index = |
|
460 |
uintptr_t(from_hr->bottom()) |
|
461 |
>> CardTableModRefBS::card_shift; |
|
2996
1097030e5ec3
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
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2882
diff
changeset
|
462 |
CardIdx_t card_index = from_card - from_hr_bot_card_index; |
10677
370a8da2d63f
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
10243
diff
changeset
|
463 |
assert(0 <= card_index && (size_t)card_index < HeapRegion::CardsPerRegion, |
1374 | 464 |
"Must be in range."); |
465 |
if (G1HRRSUseSparseTable && |
|
26424
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8057143: Incomplete renaming of variables containing "hrs" to "hrm" related to HeapRegionSeq
tschatzl
parents:
26422
diff
changeset
|
466 |
_sparse_table.add_card(from_hrm_ind, card_index)) { |
1374 | 467 |
if (G1RecordHRRSOops) { |
28030 | 468 |
HeapRegionRemSet::record(_hr, from); |
13113
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changeset
|
469 |
if (G1TraceHeapRegionRememberedSet) { |
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changeset
|
470 |
gclog_or_tty->print(" Added card " PTR_FORMAT " to region " |
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diff
changeset
|
471 |
"[" PTR_FORMAT "...) for ref " PTR_FORMAT ".\n", |
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changeset
|
472 |
align_size_down(uintptr_t(from), |
ab3870a79b18
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diff
changeset
|
473 |
CardTableModRefBS::card_size), |
28030 | 474 |
_hr->bottom(), from); |
13113
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diff
changeset
|
475 |
} |
1374 | 476 |
} |
13113
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diff
changeset
|
477 |
if (G1TraceHeapRegionRememberedSet) { |
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
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parents:
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diff
changeset
|
478 |
gclog_or_tty->print_cr(" added card to sparse table."); |
ab3870a79b18
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parents:
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diff
changeset
|
479 |
} |
1374 | 480 |
assert(contains_reference_locked(from), "We just added it!"); |
481 |
return; |
|
482 |
} else { |
|
13113
ab3870a79b18
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12779
diff
changeset
|
483 |
if (G1TraceHeapRegionRememberedSet) { |
26850
515ff48cf5f0
8036116: Fix thread-id types in G1 remembered set implementations
brutisso
parents:
26424
diff
changeset
|
484 |
gclog_or_tty->print_cr(" [tid %u] sparse table entry " |
24092
e274d864545a
8039743: Use correct format specifier to print size_t values and pointers in the GC code
stefank
parents:
23858
diff
changeset
|
485 |
"overflow(f: %d, t: %u)", |
26424
639e661f19f3
8057143: Incomplete renaming of variables containing "hrs" to "hrm" related to HeapRegionSeq
tschatzl
parents:
26422
diff
changeset
|
486 |
tid, from_hrm_ind, cur_hrm_ind); |
13113
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changeset
|
487 |
} |
1374 | 488 |
} |
489 |
||
490 |
if (_n_fine_entries == _max_fine_entries) { |
|
491 |
prt = delete_region_table(); |
|
13335 | 492 |
// There is no need to clear the links to the 'all' list here: |
493 |
// prt will be reused immediately, i.e. remain in the 'all' list. |
|
494 |
prt->init(from_hr, false /* clear_links_to_all_list */); |
|
1374 | 495 |
} else { |
13113
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changeset
|
496 |
prt = PerRegionTable::alloc(from_hr); |
13335 | 497 |
link_to_all(prt); |
1374 | 498 |
} |
499 |
||
13113
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changeset
|
500 |
PerRegionTable* first_prt = _fine_grain_regions[ind]; |
13335 | 501 |
prt->set_collision_list_next(first_prt); |
1374 | 502 |
_fine_grain_regions[ind] = prt; |
503 |
_n_fine_entries++; |
|
504 |
||
505 |
if (G1HRRSUseSparseTable) { |
|
4902
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4900
diff
changeset
|
506 |
// Transfer from sparse to fine-grain. |
26424
639e661f19f3
8057143: Incomplete renaming of variables containing "hrs" to "hrm" related to HeapRegionSeq
tschatzl
parents:
26422
diff
changeset
|
507 |
SparsePRTEntry *sprt_entry = _sparse_table.get_entry(from_hrm_ind); |
4902
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4900
diff
changeset
|
508 |
assert(sprt_entry != NULL, "There should have been an entry"); |
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
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diff
changeset
|
509 |
for (int i = 0; i < SparsePRTEntry::cards_num(); i++) { |
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4900
diff
changeset
|
510 |
CardIdx_t c = sprt_entry->card(i); |
1374 | 511 |
if (c != SparsePRTEntry::NullEntry) { |
512 |
prt->add_card(c); |
|
513 |
} |
|
514 |
} |
|
515 |
// Now we can delete the sparse entry. |
|
26424
639e661f19f3
8057143: Incomplete renaming of variables containing "hrs" to "hrm" related to HeapRegionSeq
tschatzl
parents:
26422
diff
changeset
|
516 |
bool res = _sparse_table.delete_entry(from_hrm_ind); |
1374 | 517 |
assert(res, "It should have been there."); |
518 |
} |
|
519 |
} |
|
520 |
assert(prt != NULL && prt->hr() == from_hr, "consequence"); |
|
521 |
} |
|
522 |
// Note that we can't assert "prt->hr() == from_hr", because of the |
|
523 |
// possibility of concurrent reuse. But see head comment of |
|
524 |
// OtherRegionsTable for why this is OK. |
|
525 |
assert(prt != NULL, "Inv"); |
|
526 |
||
13113
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6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
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diff
changeset
|
527 |
prt->add_reference(from); |
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
528 |
|
1374 | 529 |
if (G1RecordHRRSOops) { |
28030 | 530 |
HeapRegionRemSet::record(_hr, from); |
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
531 |
if (G1TraceHeapRegionRememberedSet) { |
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
532 |
gclog_or_tty->print("Added card " PTR_FORMAT " to region " |
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
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diff
changeset
|
533 |
"[" PTR_FORMAT "...) for ref " PTR_FORMAT ".\n", |
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
534 |
align_size_down(uintptr_t(from), |
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
535 |
CardTableModRefBS::card_size), |
28030 | 536 |
_hr->bottom(), from); |
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
537 |
} |
1374 | 538 |
} |
539 |
assert(contains_reference(from), "We just added it!"); |
|
540 |
} |
|
541 |
||
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
542 |
PerRegionTable* |
1374 | 543 |
OtherRegionsTable::find_region_table(size_t ind, HeapRegion* hr) const { |
29580
a67a581cfe11
8073315: Enable gcc -Wtype-limits and fix upcoming issues.
goetz
parents:
28379
diff
changeset
|
544 |
assert(ind < _max_fine_entries, "Preconditions."); |
13113
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6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
545 |
PerRegionTable* prt = _fine_grain_regions[ind]; |
1374 | 546 |
while (prt != NULL && prt->hr() != hr) { |
13335 | 547 |
prt = prt->collision_list_next(); |
1374 | 548 |
} |
549 |
// Loop postcondition is the method postcondition. |
|
550 |
return prt; |
|
551 |
} |
|
552 |
||
553 |
jint OtherRegionsTable::_n_coarsenings = 0; |
|
554 |
||
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
555 |
PerRegionTable* OtherRegionsTable::delete_region_table() { |
23451
ed2b8bb28fed
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
21563
diff
changeset
|
556 |
assert(_m->owned_by_self(), "Precondition"); |
1374 | 557 |
assert(_n_fine_entries == _max_fine_entries, "Precondition"); |
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
558 |
PerRegionTable* max = NULL; |
1374 | 559 |
jint max_occ = 0; |
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
560 |
PerRegionTable** max_prev; |
1374 | 561 |
size_t max_ind; |
562 |
||
563 |
size_t i = _fine_eviction_start; |
|
564 |
for (size_t k = 0; k < _fine_eviction_sample_size; k++) { |
|
565 |
size_t ii = i; |
|
566 |
// Make sure we get a non-NULL sample. |
|
567 |
while (_fine_grain_regions[ii] == NULL) { |
|
568 |
ii++; |
|
569 |
if (ii == _max_fine_entries) ii = 0; |
|
570 |
guarantee(ii != i, "We must find one."); |
|
571 |
} |
|
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
572 |
PerRegionTable** prev = &_fine_grain_regions[ii]; |
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
573 |
PerRegionTable* cur = *prev; |
1374 | 574 |
while (cur != NULL) { |
575 |
jint cur_occ = cur->occupied(); |
|
576 |
if (max == NULL || cur_occ > max_occ) { |
|
577 |
max = cur; |
|
578 |
max_prev = prev; |
|
579 |
max_ind = i; |
|
580 |
max_occ = cur_occ; |
|
581 |
} |
|
13335 | 582 |
prev = cur->collision_list_next_addr(); |
583 |
cur = cur->collision_list_next(); |
|
1374 | 584 |
} |
585 |
i = i + _fine_eviction_stride; |
|
586 |
if (i >= _n_fine_entries) i = i - _n_fine_entries; |
|
587 |
} |
|
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
588 |
|
1374 | 589 |
_fine_eviction_start++; |
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
590 |
|
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
591 |
if (_fine_eviction_start >= _n_fine_entries) { |
1374 | 592 |
_fine_eviction_start -= _n_fine_entries; |
593 |
} |
|
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
594 |
|
1374 | 595 |
guarantee(max != NULL, "Since _n_fine_entries > 0"); |
596 |
||
597 |
// Set the corresponding coarse bit. |
|
26316
93f6b40c038b
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
26160
diff
changeset
|
598 |
size_t max_hrm_index = (size_t) max->hr()->hrm_index(); |
93f6b40c038b
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
26160
diff
changeset
|
599 |
if (!_coarse_map.at(max_hrm_index)) { |
93f6b40c038b
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
26160
diff
changeset
|
600 |
_coarse_map.at_put(max_hrm_index, true); |
1374 | 601 |
_n_coarse_entries++; |
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
602 |
if (G1TraceHeapRegionRememberedSet) { |
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
603 |
gclog_or_tty->print("Coarsened entry in region [" PTR_FORMAT "...] " |
24092
e274d864545a
8039743: Use correct format specifier to print size_t values and pointers in the GC code
stefank
parents:
23858
diff
changeset
|
604 |
"for region [" PTR_FORMAT "...] (" SIZE_FORMAT " coarse entries).\n", |
28030 | 605 |
_hr->bottom(), |
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
606 |
max->hr()->bottom(), |
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
607 |
_n_coarse_entries); |
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
608 |
} |
1374 | 609 |
} |
610 |
||
611 |
// Unsplice. |
|
13335 | 612 |
*max_prev = max->collision_list_next(); |
1374 | 613 |
Atomic::inc(&_n_coarsenings); |
614 |
_n_fine_entries--; |
|
615 |
return max; |
|
616 |
} |
|
617 |
||
618 |
void OtherRegionsTable::scrub(CardTableModRefBS* ctbs, |
|
619 |
BitMap* region_bm, BitMap* card_bm) { |
|
620 |
// First eliminated garbage regions from the coarse map. |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
621 |
if (G1RSScrubVerbose) { |
28030 | 622 |
gclog_or_tty->print_cr("Scrubbing region %u:", _hr->hrm_index()); |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
623 |
} |
1374 | 624 |
|
625 |
assert(_coarse_map.size() == region_bm->size(), "Precondition"); |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
626 |
if (G1RSScrubVerbose) { |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
627 |
gclog_or_tty->print(" Coarse map: before = "SIZE_FORMAT"...", |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
628 |
_n_coarse_entries); |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
629 |
} |
1374 | 630 |
_coarse_map.set_intersection(*region_bm); |
631 |
_n_coarse_entries = _coarse_map.count_one_bits(); |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
632 |
if (G1RSScrubVerbose) { |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
633 |
gclog_or_tty->print_cr(" after = "SIZE_FORMAT".", _n_coarse_entries); |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
634 |
} |
1374 | 635 |
|
636 |
// Now do the fine-grained maps. |
|
637 |
for (size_t i = 0; i < _max_fine_entries; i++) { |
|
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
638 |
PerRegionTable* cur = _fine_grain_regions[i]; |
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
639 |
PerRegionTable** prev = &_fine_grain_regions[i]; |
1374 | 640 |
while (cur != NULL) { |
13335 | 641 |
PerRegionTable* nxt = cur->collision_list_next(); |
1374 | 642 |
// If the entire region is dead, eliminate. |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
643 |
if (G1RSScrubVerbose) { |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
644 |
gclog_or_tty->print_cr(" For other region %u:", |
26316
93f6b40c038b
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
26160
diff
changeset
|
645 |
cur->hr()->hrm_index()); |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
646 |
} |
26316
93f6b40c038b
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
26160
diff
changeset
|
647 |
if (!region_bm->at((size_t) cur->hr()->hrm_index())) { |
1374 | 648 |
*prev = nxt; |
13335 | 649 |
cur->set_collision_list_next(NULL); |
1374 | 650 |
_n_fine_entries--; |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
651 |
if (G1RSScrubVerbose) { |
1374 | 652 |
gclog_or_tty->print_cr(" deleted via region map."); |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
653 |
} |
13335 | 654 |
unlink_from_all(cur); |
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
655 |
PerRegionTable::free(cur); |
1374 | 656 |
} else { |
657 |
// Do fine-grain elimination. |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
658 |
if (G1RSScrubVerbose) { |
1374 | 659 |
gclog_or_tty->print(" occ: before = %4d.", cur->occupied()); |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
660 |
} |
1374 | 661 |
cur->scrub(ctbs, card_bm); |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
662 |
if (G1RSScrubVerbose) { |
1374 | 663 |
gclog_or_tty->print_cr(" after = %4d.", cur->occupied()); |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
664 |
} |
1374 | 665 |
// Did that empty the table completely? |
666 |
if (cur->occupied() == 0) { |
|
667 |
*prev = nxt; |
|
13335 | 668 |
cur->set_collision_list_next(NULL); |
1374 | 669 |
_n_fine_entries--; |
13335 | 670 |
unlink_from_all(cur); |
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
671 |
PerRegionTable::free(cur); |
1374 | 672 |
} else { |
13335 | 673 |
prev = cur->collision_list_next_addr(); |
1374 | 674 |
} |
675 |
} |
|
676 |
cur = nxt; |
|
677 |
} |
|
678 |
} |
|
679 |
// Since we may have deleted a from_card_cache entry from the RS, clear |
|
680 |
// the FCC. |
|
681 |
clear_fcc(); |
|
682 |
} |
|
683 |
||
28379
e6784fc8fff2
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
28170
diff
changeset
|
684 |
bool OtherRegionsTable::occupancy_less_or_equal_than(size_t limit) const { |
e6784fc8fff2
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
28170
diff
changeset
|
685 |
if (limit <= (size_t)G1RSetSparseRegionEntries) { |
e6784fc8fff2
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
28170
diff
changeset
|
686 |
return occ_coarse() == 0 && _first_all_fine_prts == NULL && occ_sparse() <= limit; |
e6784fc8fff2
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
28170
diff
changeset
|
687 |
} else { |
e6784fc8fff2
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
28170
diff
changeset
|
688 |
// Current uses of this method may only use values less than G1RSetSparseRegionEntries |
e6784fc8fff2
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
28170
diff
changeset
|
689 |
// for the limit. The solution, comparing against occupied() would be too slow |
e6784fc8fff2
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
28170
diff
changeset
|
690 |
// at this time. |
e6784fc8fff2
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
28170
diff
changeset
|
691 |
Unimplemented(); |
e6784fc8fff2
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
28170
diff
changeset
|
692 |
return false; |
e6784fc8fff2
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
28170
diff
changeset
|
693 |
} |
e6784fc8fff2
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
28170
diff
changeset
|
694 |
} |
e6784fc8fff2
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
28170
diff
changeset
|
695 |
|
25889
221296ac4359
8027959: Early reclamation of large objects in G1
tschatzl
parents:
25492
diff
changeset
|
696 |
bool OtherRegionsTable::is_empty() const { |
221296ac4359
8027959: Early reclamation of large objects in G1
tschatzl
parents:
25492
diff
changeset
|
697 |
return occ_sparse() == 0 && occ_coarse() == 0 && _first_all_fine_prts == NULL; |
221296ac4359
8027959: Early reclamation of large objects in G1
tschatzl
parents:
25492
diff
changeset
|
698 |
} |
1374 | 699 |
|
700 |
size_t OtherRegionsTable::occupied() const { |
|
701 |
size_t sum = occ_fine(); |
|
702 |
sum += occ_sparse(); |
|
703 |
sum += occ_coarse(); |
|
704 |
return sum; |
|
705 |
} |
|
706 |
||
707 |
size_t OtherRegionsTable::occ_fine() const { |
|
708 |
size_t sum = 0; |
|
13335 | 709 |
|
710 |
size_t num = 0; |
|
711 |
PerRegionTable * cur = _first_all_fine_prts; |
|
712 |
while (cur != NULL) { |
|
713 |
sum += cur->occupied(); |
|
714 |
cur = cur->next(); |
|
715 |
num++; |
|
1374 | 716 |
} |
13335 | 717 |
guarantee(num == _n_fine_entries, "just checking"); |
1374 | 718 |
return sum; |
719 |
} |
|
720 |
||
721 |
size_t OtherRegionsTable::occ_coarse() const { |
|
3697
ea9211aa02f5
6819085: G1: use larger and/or user settable region size
tonyp
parents:
3262
diff
changeset
|
722 |
return (_n_coarse_entries * HeapRegion::CardsPerRegion); |
1374 | 723 |
} |
724 |
||
725 |
size_t OtherRegionsTable::occ_sparse() const { |
|
726 |
return _sparse_table.occupied(); |
|
727 |
} |
|
728 |
||
729 |
size_t OtherRegionsTable::mem_size() const { |
|
730 |
size_t sum = 0; |
|
17395
2cd3ef1be718
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
17119
diff
changeset
|
731 |
// all PRTs are of the same size so it is sufficient to query only one of them. |
2cd3ef1be718
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
17119
diff
changeset
|
732 |
if (_first_all_fine_prts != NULL) { |
2cd3ef1be718
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
17119
diff
changeset
|
733 |
assert(_last_all_fine_prts != NULL && |
2cd3ef1be718
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
17119
diff
changeset
|
734 |
_first_all_fine_prts->mem_size() == _last_all_fine_prts->mem_size(), "check that mem_size() is constant"); |
2cd3ef1be718
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
17119
diff
changeset
|
735 |
sum += _first_all_fine_prts->mem_size() * _n_fine_entries; |
1374 | 736 |
} |
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
737 |
sum += (sizeof(PerRegionTable*) * _max_fine_entries); |
1374 | 738 |
sum += (_coarse_map.size_in_words() * HeapWordSize); |
739 |
sum += (_sparse_table.mem_size()); |
|
24108
dfc2242fc6b0
8040792: G1: Memory usage calculation uses sizeof(this) instead of sizeof(classname)
tschatzl
parents:
24106
diff
changeset
|
740 |
sum += sizeof(OtherRegionsTable) - sizeof(_sparse_table); // Avoid double counting above. |
1374 | 741 |
return sum; |
742 |
} |
|
743 |
||
744 |
size_t OtherRegionsTable::static_mem_size() { |
|
23456
9a9485a32cb3
8034868: Extract G1 From Card Cache into separate class
tschatzl
parents:
23453
diff
changeset
|
745 |
return FromCardCache::static_mem_size(); |
1374 | 746 |
} |
747 |
||
748 |
size_t OtherRegionsTable::fl_mem_size() { |
|
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
749 |
return PerRegionTable::fl_mem_size(); |
1374 | 750 |
} |
751 |
||
752 |
void OtherRegionsTable::clear_fcc() { |
|
28030 | 753 |
FromCardCache::clear(_hr->hrm_index()); |
1374 | 754 |
} |
755 |
||
756 |
void OtherRegionsTable::clear() { |
|
13335 | 757 |
// if there are no entries, skip this step |
758 |
if (_first_all_fine_prts != NULL) { |
|
759 |
guarantee(_first_all_fine_prts != NULL && _last_all_fine_prts != NULL, "just checking"); |
|
760 |
PerRegionTable::bulk_free(_first_all_fine_prts, _last_all_fine_prts); |
|
761 |
memset(_fine_grain_regions, 0, _max_fine_entries * sizeof(_fine_grain_regions[0])); |
|
762 |
} else { |
|
763 |
guarantee(_first_all_fine_prts == NULL && _last_all_fine_prts == NULL, "just checking"); |
|
1374 | 764 |
} |
13335 | 765 |
|
766 |
_first_all_fine_prts = _last_all_fine_prts = NULL; |
|
1374 | 767 |
_sparse_table.clear(); |
768 |
_coarse_map.clear(); |
|
769 |
_n_fine_entries = 0; |
|
770 |
_n_coarse_entries = 0; |
|
771 |
||
772 |
clear_fcc(); |
|
773 |
} |
|
774 |
||
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
775 |
bool OtherRegionsTable::contains_reference(OopOrNarrowOopStar from) const { |
1374 | 776 |
// Cast away const in this case. |
23451
ed2b8bb28fed
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
21563
diff
changeset
|
777 |
MutexLockerEx x((Mutex*)_m, Mutex::_no_safepoint_check_flag); |
1374 | 778 |
return contains_reference_locked(from); |
779 |
} |
|
780 |
||
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
781 |
bool OtherRegionsTable::contains_reference_locked(OopOrNarrowOopStar from) const { |
1374 | 782 |
HeapRegion* hr = _g1h->heap_region_containing_raw(from); |
26316
93f6b40c038b
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
26160
diff
changeset
|
783 |
RegionIdx_t hr_ind = (RegionIdx_t) hr->hrm_index(); |
1374 | 784 |
// Is this region in the coarse map? |
785 |
if (_coarse_map.at(hr_ind)) return true; |
|
786 |
||
13113
ab3870a79b18
6921087: G1: remove per-GC-thread expansion tables from the fine-grain remembered sets
johnc
parents:
12779
diff
changeset
|
787 |
PerRegionTable* prt = find_region_table(hr_ind & _mod_max_fine_entries_mask, |
1374 | 788 |
hr); |
789 |
if (prt != NULL) { |
|
790 |
return prt->contains_reference(from); |
|
791 |
||
792 |
} else { |
|
793 |
uintptr_t from_card = |
|
794 |
(uintptr_t(from) >> CardTableModRefBS::card_shift); |
|
795 |
uintptr_t hr_bot_card_index = |
|
796 |
uintptr_t(hr->bottom()) >> CardTableModRefBS::card_shift; |
|
797 |
assert(from_card >= hr_bot_card_index, "Inv"); |
|
2996
1097030e5ec3
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
2882
diff
changeset
|
798 |
CardIdx_t card_index = from_card - hr_bot_card_index; |
10677
370a8da2d63f
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
10243
diff
changeset
|
799 |
assert(0 <= card_index && (size_t)card_index < HeapRegion::CardsPerRegion, |
3697
ea9211aa02f5
6819085: G1: use larger and/or user settable region size
tonyp
parents:
3262
diff
changeset
|
800 |
"Must be in range."); |
2996
1097030e5ec3
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
2882
diff
changeset
|
801 |
return _sparse_table.contains_card(hr_ind, card_index); |
1374 | 802 |
} |
803 |
} |
|
804 |
||
8072 | 805 |
void |
806 |
OtherRegionsTable::do_cleanup_work(HRRSCleanupTask* hrrs_cleanup_task) { |
|
807 |
_sparse_table.do_cleanup_work(hrrs_cleanup_task); |
|
808 |
} |
|
809 |
||
2882
d508a8bac491
6841831: G1: assert(contains_reference(from),"We just added it!") fires
iveresov
parents:
2881
diff
changeset
|
810 |
// Determines how many threads can add records to an rset in parallel. |
d508a8bac491
6841831: G1: assert(contains_reference(from),"We just added it!") fires
iveresov
parents:
2881
diff
changeset
|
811 |
// This can be done by either mutator threads together with the |
d508a8bac491
6841831: G1: assert(contains_reference(from),"We just added it!") fires
iveresov
parents:
2881
diff
changeset
|
812 |
// concurrent refinement threads or GC threads. |
23452
d7dca4e6b95d
8035815: Cache-align and pad the from card cache
tschatzl
parents:
23451
diff
changeset
|
813 |
uint HeapRegionRemSet::num_par_rem_sets() { |
23855
c4574075402c
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
23456
diff
changeset
|
814 |
return MAX2(DirtyCardQueueSet::num_par_ids() + ConcurrentG1Refine::thread_num(), (uint)ParallelGCThreads); |
1374 | 815 |
} |
816 |
||
817 |
HeapRegionRemSet::HeapRegionRemSet(G1BlockOffsetSharedArray* bosa, |
|
818 |
HeapRegion* hr) |
|
23451
ed2b8bb28fed
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
21563
diff
changeset
|
819 |
: _bosa(bosa), |
28163
322d55d167be
8047290: Make Mutex::_no_safepoint_check_flag locks verify that this lock never checks for safepoint
coleenp
parents:
26850
diff
changeset
|
820 |
_m(Mutex::leaf, FormatBuffer<128>("HeapRegionRemSet lock #%u", hr->hrm_index()), true, Monitor::_safepoint_check_never), |
26160 | 821 |
_code_roots(), _other_regions(hr, &_m), _iter_state(Unclaimed), _iter_claimed(0) { |
10000
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9989
diff
changeset
|
822 |
reset_for_par_iteration(); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9989
diff
changeset
|
823 |
} |
1374 | 824 |
|
4902
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4900
diff
changeset
|
825 |
void HeapRegionRemSet::setup_remset_size() { |
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4900
diff
changeset
|
826 |
// Setup sparse and fine-grain tables sizes. |
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4900
diff
changeset
|
827 |
// table_size = base * (log(region_size / 1M) + 1) |
12779
06778de5193e
7171936: LOG_G incorrectly defined in globalDefinitions.hpp
brutisso
parents:
12381
diff
changeset
|
828 |
const int LOG_M = 20; |
06778de5193e
7171936: LOG_G incorrectly defined in globalDefinitions.hpp
brutisso
parents:
12381
diff
changeset
|
829 |
int region_size_log_mb = MAX2(HeapRegion::LogOfHRGrainBytes - LOG_M, 0); |
4902
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4900
diff
changeset
|
830 |
if (FLAG_IS_DEFAULT(G1RSetSparseRegionEntries)) { |
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4900
diff
changeset
|
831 |
G1RSetSparseRegionEntries = G1RSetSparseRegionEntriesBase * (region_size_log_mb + 1); |
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4900
diff
changeset
|
832 |
} |
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4900
diff
changeset
|
833 |
if (FLAG_IS_DEFAULT(G1RSetRegionEntries)) { |
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4900
diff
changeset
|
834 |
G1RSetRegionEntries = G1RSetRegionEntriesBase * (region_size_log_mb + 1); |
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4900
diff
changeset
|
835 |
} |
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4900
diff
changeset
|
836 |
guarantee(G1RSetSparseRegionEntries > 0 && G1RSetRegionEntries > 0 , "Sanity"); |
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4900
diff
changeset
|
837 |
} |
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4900
diff
changeset
|
838 |
|
1374 | 839 |
bool HeapRegionRemSet::claim_iter() { |
840 |
if (_iter_state != Unclaimed) return false; |
|
841 |
jint res = Atomic::cmpxchg(Claimed, (jint*)(&_iter_state), Unclaimed); |
|
842 |
return (res == Unclaimed); |
|
843 |
} |
|
844 |
||
845 |
void HeapRegionRemSet::set_iter_complete() { |
|
846 |
_iter_state = Complete; |
|
847 |
} |
|
848 |
||
849 |
bool HeapRegionRemSet::iter_is_complete() { |
|
850 |
return _iter_state == Complete; |
|
851 |
} |
|
852 |
||
853 |
#ifndef PRODUCT |
|
23451
ed2b8bb28fed
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
21563
diff
changeset
|
854 |
void HeapRegionRemSet::print() { |
17108
cf72dcf9a8f2
8011724: G1: Stack allocate instances of HeapRegionRemSetIterator
johnc
parents:
13752
diff
changeset
|
855 |
HeapRegionRemSetIterator iter(this); |
1374 | 856 |
size_t card_index; |
857 |
while (iter.has_next(card_index)) { |
|
858 |
HeapWord* card_start = |
|
859 |
G1CollectedHeap::heap()->bot_shared()->address_for_index(card_index); |
|
10000
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9989
diff
changeset
|
860 |
gclog_or_tty->print_cr(" Card " PTR_FORMAT, card_start); |
1374 | 861 |
} |
862 |
if (iter.n_yielded() != occupied()) { |
|
863 |
gclog_or_tty->print_cr("Yielded disagrees with occupied:"); |
|
24092
e274d864545a
8039743: Use correct format specifier to print size_t values and pointers in the GC code
stefank
parents:
23858
diff
changeset
|
864 |
gclog_or_tty->print_cr(" " SIZE_FORMAT_W(6) " yielded (" SIZE_FORMAT_W(6) |
e274d864545a
8039743: Use correct format specifier to print size_t values and pointers in the GC code
stefank
parents:
23858
diff
changeset
|
865 |
" coarse, " SIZE_FORMAT_W(6) " fine).", |
1374 | 866 |
iter.n_yielded(), |
867 |
iter.n_yielded_coarse(), iter.n_yielded_fine()); |
|
24092
e274d864545a
8039743: Use correct format specifier to print size_t values and pointers in the GC code
stefank
parents:
23858
diff
changeset
|
868 |
gclog_or_tty->print_cr(" " SIZE_FORMAT_W(6) " occ (" SIZE_FORMAT_W(6) |
e274d864545a
8039743: Use correct format specifier to print size_t values and pointers in the GC code
stefank
parents:
23858
diff
changeset
|
869 |
" coarse, " SIZE_FORMAT_W(6) " fine).", |
1374 | 870 |
occupied(), occ_coarse(), occ_fine()); |
871 |
} |
|
872 |
guarantee(iter.n_yielded() == occupied(), |
|
873 |
"We should have yielded all the represented cards."); |
|
874 |
} |
|
875 |
#endif |
|
876 |
||
877 |
void HeapRegionRemSet::cleanup() { |
|
878 |
SparsePRT::cleanup_all(); |
|
879 |
} |
|
880 |
||
881 |
void HeapRegionRemSet::clear() { |
|
23451
ed2b8bb28fed
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
21563
diff
changeset
|
882 |
MutexLockerEx x(&_m, Mutex::_no_safepoint_check_flag); |
ed2b8bb28fed
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
21563
diff
changeset
|
883 |
clear_locked(); |
ed2b8bb28fed
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
21563
diff
changeset
|
884 |
} |
19339 | 885 |
|
23451
ed2b8bb28fed
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
21563
diff
changeset
|
886 |
void HeapRegionRemSet::clear_locked() { |
ed2b8bb28fed
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
21563
diff
changeset
|
887 |
_code_roots.clear(); |
1374 | 888 |
_other_regions.clear(); |
23451
ed2b8bb28fed
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
21563
diff
changeset
|
889 |
assert(occupied_locked() == 0, "Should be clear."); |
10000
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9989
diff
changeset
|
890 |
reset_for_par_iteration(); |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9989
diff
changeset
|
891 |
} |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9989
diff
changeset
|
892 |
|
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9989
diff
changeset
|
893 |
void HeapRegionRemSet::reset_for_par_iteration() { |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9989
diff
changeset
|
894 |
_iter_state = Unclaimed; |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9989
diff
changeset
|
895 |
_iter_claimed = 0; |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9989
diff
changeset
|
896 |
// It's good to check this to make sure that the two methods are in sync. |
5bbb58b0dbb9
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
9989
diff
changeset
|
897 |
assert(verify_ready_for_par_iteration(), "post-condition"); |
1374 | 898 |
} |
899 |
||
900 |
void HeapRegionRemSet::scrub(CardTableModRefBS* ctbs, |
|
901 |
BitMap* region_bm, BitMap* card_bm) { |
|
902 |
_other_regions.scrub(ctbs, region_bm, card_bm); |
|
903 |
} |
|
904 |
||
19339 | 905 |
// Code roots support |
26422 | 906 |
// |
907 |
// The code root set is protected by two separate locking schemes |
|
908 |
// When at safepoint the per-hrrs lock must be held during modifications |
|
909 |
// except when doing a full gc. |
|
910 |
// When not at safepoint the CodeCache_lock must be held during modifications. |
|
911 |
// When concurrent readers access the contains() function |
|
912 |
// (during the evacuation phase) no removals are allowed. |
|
19339 | 913 |
|
914 |
void HeapRegionRemSet::add_strong_code_root(nmethod* nm) { |
|
915 |
assert(nm != NULL, "sanity"); |
|
26422 | 916 |
// Optimistic unlocked contains-check |
917 |
if (!_code_roots.contains(nm)) { |
|
918 |
MutexLockerEx ml(&_m, Mutex::_no_safepoint_check_flag); |
|
919 |
add_strong_code_root_locked(nm); |
|
920 |
} |
|
921 |
} |
|
922 |
||
923 |
void HeapRegionRemSet::add_strong_code_root_locked(nmethod* nm) { |
|
924 |
assert(nm != NULL, "sanity"); |
|
23451
ed2b8bb28fed
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
21563
diff
changeset
|
925 |
_code_roots.add(nm); |
19339 | 926 |
} |
927 |
||
928 |
void HeapRegionRemSet::remove_strong_code_root(nmethod* nm) { |
|
929 |
assert(nm != NULL, "sanity"); |
|
25492
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
930 |
assert_locked_or_safepoint(CodeCache_lock); |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
931 |
|
26422 | 932 |
MutexLockerEx ml(CodeCache_lock->owned_by_self() ? NULL : &_m, Mutex::_no_safepoint_check_flag); |
933 |
_code_roots.remove(nm); |
|
25492
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
934 |
|
19339 | 935 |
// Check that there were no duplicates |
23451
ed2b8bb28fed
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
21563
diff
changeset
|
936 |
guarantee(!_code_roots.contains(nm), "duplicate entry found"); |
19339 | 937 |
} |
938 |
||
26422 | 939 |
void HeapRegionRemSet::strong_code_roots_do(CodeBlobClosure* blk) const { |
940 |
_code_roots.nmethods_do(blk); |
|
19339 | 941 |
} |
942 |
||
26422 | 943 |
void HeapRegionRemSet::clean_strong_code_roots(HeapRegion* hr) { |
944 |
_code_roots.clean(hr); |
|
19339 | 945 |
} |
946 |
||
947 |
size_t HeapRegionRemSet::strong_code_roots_mem_size() { |
|
23451
ed2b8bb28fed
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
21563
diff
changeset
|
948 |
return _code_roots.mem_size(); |
19339 | 949 |
} |
950 |
||
23451
ed2b8bb28fed
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
21563
diff
changeset
|
951 |
HeapRegionRemSetIterator:: HeapRegionRemSetIterator(HeapRegionRemSet* hrrs) : |
17108
cf72dcf9a8f2
8011724: G1: Stack allocate instances of HeapRegionRemSetIterator
johnc
parents:
13752
diff
changeset
|
952 |
_hrrs(hrrs), |
1374 | 953 |
_g1h(G1CollectedHeap::heap()), |
17108
cf72dcf9a8f2
8011724: G1: Stack allocate instances of HeapRegionRemSetIterator
johnc
parents:
13752
diff
changeset
|
954 |
_coarse_map(&hrrs->_other_regions._coarse_map), |
28030 | 955 |
_bosa(hrrs->_bosa), |
17108
cf72dcf9a8f2
8011724: G1: Stack allocate instances of HeapRegionRemSetIterator
johnc
parents:
13752
diff
changeset
|
956 |
_is(Sparse), |
1374 | 957 |
// Set these values so that we increment to the first region. |
17108
cf72dcf9a8f2
8011724: G1: Stack allocate instances of HeapRegionRemSetIterator
johnc
parents:
13752
diff
changeset
|
958 |
_coarse_cur_region_index(-1), |
cf72dcf9a8f2
8011724: G1: Stack allocate instances of HeapRegionRemSetIterator
johnc
parents:
13752
diff
changeset
|
959 |
_coarse_cur_region_cur_card(HeapRegion::CardsPerRegion-1), |
24101
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
960 |
_cur_card_in_prt(HeapRegion::CardsPerRegion), |
17108
cf72dcf9a8f2
8011724: G1: Stack allocate instances of HeapRegionRemSetIterator
johnc
parents:
13752
diff
changeset
|
961 |
_fine_cur_prt(NULL), |
cf72dcf9a8f2
8011724: G1: Stack allocate instances of HeapRegionRemSetIterator
johnc
parents:
13752
diff
changeset
|
962 |
_n_yielded_coarse(0), |
cf72dcf9a8f2
8011724: G1: Stack allocate instances of HeapRegionRemSetIterator
johnc
parents:
13752
diff
changeset
|
963 |
_n_yielded_fine(0), |
cf72dcf9a8f2
8011724: G1: Stack allocate instances of HeapRegionRemSetIterator
johnc
parents:
13752
diff
changeset
|
964 |
_n_yielded_sparse(0), |
cf72dcf9a8f2
8011724: G1: Stack allocate instances of HeapRegionRemSetIterator
johnc
parents:
13752
diff
changeset
|
965 |
_sparse_iter(&hrrs->_other_regions._sparse_table) {} |
1374 | 966 |
|
967 |
bool HeapRegionRemSetIterator::coarse_has_next(size_t& card_index) { |
|
968 |
if (_hrrs->_other_regions._n_coarse_entries == 0) return false; |
|
969 |
// Go to the next card. |
|
970 |
_coarse_cur_region_cur_card++; |
|
971 |
// Was the last the last card in the current region? |
|
3697
ea9211aa02f5
6819085: G1: use larger and/or user settable region size
tonyp
parents:
3262
diff
changeset
|
972 |
if (_coarse_cur_region_cur_card == HeapRegion::CardsPerRegion) { |
1374 | 973 |
// Yes: find the next region. This may leave _coarse_cur_region_index |
974 |
// Set to the last index, in which case there are no more coarse |
|
975 |
// regions. |
|
976 |
_coarse_cur_region_index = |
|
977 |
(int) _coarse_map->get_next_one_offset(_coarse_cur_region_index + 1); |
|
978 |
if ((size_t)_coarse_cur_region_index < _coarse_map->size()) { |
|
979 |
_coarse_cur_region_cur_card = 0; |
|
980 |
HeapWord* r_bot = |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
10767
diff
changeset
|
981 |
_g1h->region_at((uint) _coarse_cur_region_index)->bottom(); |
1374 | 982 |
_cur_region_card_offset = _bosa->index_for(r_bot); |
983 |
} else { |
|
984 |
return false; |
|
985 |
} |
|
986 |
} |
|
987 |
// If we didn't return false above, then we can yield a card. |
|
988 |
card_index = _cur_region_card_offset + _coarse_cur_region_cur_card; |
|
989 |
return true; |
|
990 |
} |
|
991 |
||
992 |
bool HeapRegionRemSetIterator::fine_has_next(size_t& card_index) { |
|
993 |
if (fine_has_next()) { |
|
24101
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
994 |
_cur_card_in_prt = |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
995 |
_fine_cur_prt->_bm.get_next_one_offset(_cur_card_in_prt + 1); |
1374 | 996 |
} |
24101
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
997 |
if (_cur_card_in_prt == HeapRegion::CardsPerRegion) { |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
998 |
// _fine_cur_prt may still be NULL in case if there are not PRTs at all for |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
999 |
// the remembered set. |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1000 |
if (_fine_cur_prt == NULL || _fine_cur_prt->next() == NULL) { |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1001 |
return false; |
1374 | 1002 |
} |
24101
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1003 |
PerRegionTable* next_prt = _fine_cur_prt->next(); |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1004 |
switch_to_prt(next_prt); |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1005 |
_cur_card_in_prt = _fine_cur_prt->_bm.get_next_one_offset(_cur_card_in_prt + 1); |
1374 | 1006 |
} |
24101
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1007 |
|
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1008 |
card_index = _cur_region_card_offset + _cur_card_in_prt; |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1009 |
guarantee(_cur_card_in_prt < HeapRegion::CardsPerRegion, |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1010 |
err_msg("Card index "SIZE_FORMAT" must be within the region", _cur_card_in_prt)); |
1374 | 1011 |
return true; |
1012 |
} |
|
1013 |
||
1014 |
bool HeapRegionRemSetIterator::fine_has_next() { |
|
24101
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1015 |
return _cur_card_in_prt != HeapRegion::CardsPerRegion; |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1016 |
} |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1017 |
|
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1018 |
void HeapRegionRemSetIterator::switch_to_prt(PerRegionTable* prt) { |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1019 |
assert(prt != NULL, "Cannot switch to NULL prt"); |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1020 |
_fine_cur_prt = prt; |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1021 |
|
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1022 |
HeapWord* r_bot = _fine_cur_prt->hr()->bottom(); |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1023 |
_cur_region_card_offset = _bosa->index_for(r_bot); |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1024 |
|
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1025 |
// The bitmap scan for the PRT always scans from _cur_region_cur_card + 1. |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1026 |
// To avoid special-casing this start case, and not miss the first bitmap |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1027 |
// entry, initialize _cur_region_cur_card with -1 instead of 0. |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1028 |
_cur_card_in_prt = (size_t)-1; |
1374 | 1029 |
} |
1030 |
||
1031 |
bool HeapRegionRemSetIterator::has_next(size_t& card_index) { |
|
1032 |
switch (_is) { |
|
24101
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1033 |
case Sparse: { |
1374 | 1034 |
if (_sparse_iter.has_next(card_index)) { |
1035 |
_n_yielded_sparse++; |
|
1036 |
return true; |
|
1037 |
} |
|
1038 |
// Otherwise, deliberate fall-through |
|
1039 |
_is = Fine; |
|
24101
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1040 |
PerRegionTable* initial_fine_prt = _hrrs->_other_regions._first_all_fine_prts; |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1041 |
if (initial_fine_prt != NULL) { |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1042 |
switch_to_prt(_hrrs->_other_regions._first_all_fine_prts); |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1043 |
} |
bd1a2ee20760
8037344: Use the "next" field to iterate over fine remembered instead of using the hash table
tschatzl
parents:
24092
diff
changeset
|
1044 |
} |
1374 | 1045 |
case Fine: |
1046 |
if (fine_has_next(card_index)) { |
|
1047 |
_n_yielded_fine++; |
|
1048 |
return true; |
|
1049 |
} |
|
1050 |
// Otherwise, deliberate fall-through |
|
1051 |
_is = Coarse; |
|
1052 |
case Coarse: |
|
1053 |
if (coarse_has_next(card_index)) { |
|
1054 |
_n_yielded_coarse++; |
|
1055 |
return true; |
|
1056 |
} |
|
1057 |
// Otherwise... |
|
1058 |
break; |
|
1059 |
} |
|
1060 |
assert(ParallelGCThreads > 1 || |
|
1061 |
n_yielded() == _hrrs->occupied(), |
|
1062 |
"Should have yielded all the cards in the rem set " |
|
1063 |
"(in the non-par case)."); |
|
1064 |
return false; |
|
1065 |
} |
|
1066 |
||
1067 |
||
1068 |
||
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
1069 |
OopOrNarrowOopStar* HeapRegionRemSet::_recorded_oops = NULL; |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
1070 |
HeapWord** HeapRegionRemSet::_recorded_cards = NULL; |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
1071 |
HeapRegion** HeapRegionRemSet::_recorded_regions = NULL; |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
1072 |
int HeapRegionRemSet::_n_recorded = 0; |
1374 | 1073 |
|
1074 |
HeapRegionRemSet::Event* HeapRegionRemSet::_recorded_events = NULL; |
|
1075 |
int* HeapRegionRemSet::_recorded_event_index = NULL; |
|
1076 |
int HeapRegionRemSet::_n_recorded_events = 0; |
|
1077 |
||
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
1078 |
void HeapRegionRemSet::record(HeapRegion* hr, OopOrNarrowOopStar f) { |
1374 | 1079 |
if (_recorded_oops == NULL) { |
1080 |
assert(_n_recorded == 0 |
|
1081 |
&& _recorded_cards == NULL |
|
1082 |
&& _recorded_regions == NULL, |
|
1083 |
"Inv"); |
|
13195 | 1084 |
_recorded_oops = NEW_C_HEAP_ARRAY(OopOrNarrowOopStar, MaxRecorded, mtGC); |
1085 |
_recorded_cards = NEW_C_HEAP_ARRAY(HeapWord*, MaxRecorded, mtGC); |
|
1086 |
_recorded_regions = NEW_C_HEAP_ARRAY(HeapRegion*, MaxRecorded, mtGC); |
|
1374 | 1087 |
} |
1088 |
if (_n_recorded == MaxRecorded) { |
|
1089 |
gclog_or_tty->print_cr("Filled up 'recorded' (%d).", MaxRecorded); |
|
1090 |
} else { |
|
1091 |
_recorded_cards[_n_recorded] = |
|
1092 |
(HeapWord*)align_size_down(uintptr_t(f), |
|
1093 |
CardTableModRefBS::card_size); |
|
1094 |
_recorded_oops[_n_recorded] = f; |
|
1095 |
_recorded_regions[_n_recorded] = hr; |
|
1096 |
_n_recorded++; |
|
1097 |
} |
|
1098 |
} |
|
1099 |
||
1100 |
void HeapRegionRemSet::record_event(Event evnt) { |
|
1101 |
if (!G1RecordHRRSEvents) return; |
|
1102 |
||
1103 |
if (_recorded_events == NULL) { |
|
1104 |
assert(_n_recorded_events == 0 |
|
1105 |
&& _recorded_event_index == NULL, |
|
1106 |
"Inv"); |
|
13195 | 1107 |
_recorded_events = NEW_C_HEAP_ARRAY(Event, MaxRecordedEvents, mtGC); |
1108 |
_recorded_event_index = NEW_C_HEAP_ARRAY(int, MaxRecordedEvents, mtGC); |
|
1374 | 1109 |
} |
1110 |
if (_n_recorded_events == MaxRecordedEvents) { |
|
1111 |
gclog_or_tty->print_cr("Filled up 'recorded_events' (%d).", MaxRecordedEvents); |
|
1112 |
} else { |
|
1113 |
_recorded_events[_n_recorded_events] = evnt; |
|
1114 |
_recorded_event_index[_n_recorded_events] = _n_recorded; |
|
1115 |
_n_recorded_events++; |
|
1116 |
} |
|
1117 |
} |
|
1118 |
||
1119 |
void HeapRegionRemSet::print_event(outputStream* str, Event evnt) { |
|
1120 |
switch (evnt) { |
|
1121 |
case Event_EvacStart: |
|
1122 |
str->print("Evac Start"); |
|
1123 |
break; |
|
1124 |
case Event_EvacEnd: |
|
1125 |
str->print("Evac End"); |
|
1126 |
break; |
|
1127 |
case Event_RSUpdateEnd: |
|
1128 |
str->print("RS Update End"); |
|
1129 |
break; |
|
1130 |
} |
|
1131 |
} |
|
1132 |
||
1133 |
void HeapRegionRemSet::print_recorded() { |
|
1134 |
int cur_evnt = 0; |
|
1135 |
Event cur_evnt_kind; |
|
1136 |
int cur_evnt_ind = 0; |
|
1137 |
if (_n_recorded_events > 0) { |
|
1138 |
cur_evnt_kind = _recorded_events[cur_evnt]; |
|
1139 |
cur_evnt_ind = _recorded_event_index[cur_evnt]; |
|
1140 |
} |
|
1141 |
||
1142 |
for (int i = 0; i < _n_recorded; i++) { |
|
1143 |
while (cur_evnt < _n_recorded_events && i == cur_evnt_ind) { |
|
1144 |
gclog_or_tty->print("Event: "); |
|
1145 |
print_event(gclog_or_tty, cur_evnt_kind); |
|
24424
2658d7834c6e
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
24108
diff
changeset
|
1146 |
gclog_or_tty->cr(); |
1374 | 1147 |
cur_evnt++; |
1148 |
if (cur_evnt < MaxRecordedEvents) { |
|
1149 |
cur_evnt_kind = _recorded_events[cur_evnt]; |
|
1150 |
cur_evnt_ind = _recorded_event_index[cur_evnt]; |
|
1151 |
} |
|
1152 |
} |
|
1153 |
gclog_or_tty->print("Added card " PTR_FORMAT " to region [" PTR_FORMAT "...]" |
|
1154 |
" for ref " PTR_FORMAT ".\n", |
|
1155 |
_recorded_cards[i], _recorded_regions[i]->bottom(), |
|
1156 |
_recorded_oops[i]); |
|
1157 |
} |
|
1158 |
} |
|
1159 |
||
8072 | 1160 |
void HeapRegionRemSet::reset_for_cleanup_tasks() { |
1161 |
SparsePRT::reset_for_cleanup_tasks(); |
|
1162 |
} |
|
1163 |
||
1164 |
void HeapRegionRemSet::do_cleanup_work(HRRSCleanupTask* hrrs_cleanup_task) { |
|
1165 |
_other_regions.do_cleanup_work(hrrs_cleanup_task); |
|
1166 |
} |
|
1167 |
||
1168 |
void |
|
1169 |
HeapRegionRemSet::finish_cleanup_task(HRRSCleanupTask* hrrs_cleanup_task) { |
|
1170 |
SparsePRT::finish_cleanup_task(hrrs_cleanup_task); |
|
1171 |
} |
|
1172 |
||
1374 | 1173 |
#ifndef PRODUCT |
17631
17992863b0ab
8014405: G1: PerRegionTable::fl_mem_size() calculates size of the free list using wrong element sizes
tschatzl
parents:
17398
diff
changeset
|
1174 |
void PerRegionTable::test_fl_mem_size() { |
17992863b0ab
8014405: G1: PerRegionTable::fl_mem_size() calculates size of the free list using wrong element sizes
tschatzl
parents:
17398
diff
changeset
|
1175 |
PerRegionTable* dummy = alloc(NULL); |
24108
dfc2242fc6b0
8040792: G1: Memory usage calculation uses sizeof(this) instead of sizeof(classname)
tschatzl
parents:
24106
diff
changeset
|
1176 |
|
dfc2242fc6b0
8040792: G1: Memory usage calculation uses sizeof(this) instead of sizeof(classname)
tschatzl
parents:
24106
diff
changeset
|
1177 |
size_t min_prt_size = sizeof(void*) + dummy->bm()->size_in_words() * HeapWordSize; |
dfc2242fc6b0
8040792: G1: Memory usage calculation uses sizeof(this) instead of sizeof(classname)
tschatzl
parents:
24106
diff
changeset
|
1178 |
assert(dummy->mem_size() > min_prt_size, |
dfc2242fc6b0
8040792: G1: Memory usage calculation uses sizeof(this) instead of sizeof(classname)
tschatzl
parents:
24106
diff
changeset
|
1179 |
err_msg("PerRegionTable memory usage is suspiciously small, only has "SIZE_FORMAT" bytes. " |
dfc2242fc6b0
8040792: G1: Memory usage calculation uses sizeof(this) instead of sizeof(classname)
tschatzl
parents:
24106
diff
changeset
|
1180 |
"Should be at least "SIZE_FORMAT" bytes.", dummy->mem_size(), min_prt_size)); |
17631
17992863b0ab
8014405: G1: PerRegionTable::fl_mem_size() calculates size of the free list using wrong element sizes
tschatzl
parents:
17398
diff
changeset
|
1181 |
free(dummy); |
17992863b0ab
8014405: G1: PerRegionTable::fl_mem_size() calculates size of the free list using wrong element sizes
tschatzl
parents:
17398
diff
changeset
|
1182 |
guarantee(dummy->mem_size() == fl_mem_size(), "fl_mem_size() does not return the correct element size"); |
17992863b0ab
8014405: G1: PerRegionTable::fl_mem_size() calculates size of the free list using wrong element sizes
tschatzl
parents:
17398
diff
changeset
|
1183 |
// try to reset the state |
17992863b0ab
8014405: G1: PerRegionTable::fl_mem_size() calculates size of the free list using wrong element sizes
tschatzl
parents:
17398
diff
changeset
|
1184 |
_free_list = NULL; |
17992863b0ab
8014405: G1: PerRegionTable::fl_mem_size() calculates size of the free list using wrong element sizes
tschatzl
parents:
17398
diff
changeset
|
1185 |
delete dummy; |
17992863b0ab
8014405: G1: PerRegionTable::fl_mem_size() calculates size of the free list using wrong element sizes
tschatzl
parents:
17398
diff
changeset
|
1186 |
} |
17992863b0ab
8014405: G1: PerRegionTable::fl_mem_size() calculates size of the free list using wrong element sizes
tschatzl
parents:
17398
diff
changeset
|
1187 |
|
17992863b0ab
8014405: G1: PerRegionTable::fl_mem_size() calculates size of the free list using wrong element sizes
tschatzl
parents:
17398
diff
changeset
|
1188 |
void HeapRegionRemSet::test_prt() { |
17992863b0ab
8014405: G1: PerRegionTable::fl_mem_size() calculates size of the free list using wrong element sizes
tschatzl
parents:
17398
diff
changeset
|
1189 |
PerRegionTable::test_fl_mem_size(); |
17992863b0ab
8014405: G1: PerRegionTable::fl_mem_size() calculates size of the free list using wrong element sizes
tschatzl
parents:
17398
diff
changeset
|
1190 |
} |
17992863b0ab
8014405: G1: PerRegionTable::fl_mem_size() calculates size of the free list using wrong element sizes
tschatzl
parents:
17398
diff
changeset
|
1191 |
|
1374 | 1192 |
void HeapRegionRemSet::test() { |
1193 |
os::sleep(Thread::current(), (jlong)5000, false); |
|
1194 |
G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
1195 |
||
4902
991aaddb5165
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
4900
diff
changeset
|
1196 |
// Run with "-XX:G1LogRSetRegionEntries=2", so that 1 and 5 end up in same |
1374 | 1197 |
// hash bucket. |
1198 |
HeapRegion* hr0 = g1h->region_at(0); |
|
1199 |
HeapRegion* hr1 = g1h->region_at(1); |
|
1200 |
HeapRegion* hr2 = g1h->region_at(5); |
|
1201 |
HeapRegion* hr3 = g1h->region_at(6); |
|
1202 |
HeapRegion* hr4 = g1h->region_at(7); |
|
1203 |
HeapRegion* hr5 = g1h->region_at(8); |
|
1204 |
||
1205 |
HeapWord* hr1_start = hr1->bottom(); |
|
1206 |
HeapWord* hr1_mid = hr1_start + HeapRegion::GrainWords/2; |
|
1207 |
HeapWord* hr1_last = hr1->end() - 1; |
|
1208 |
||
1209 |
HeapWord* hr2_start = hr2->bottom(); |
|
1210 |
HeapWord* hr2_mid = hr2_start + HeapRegion::GrainWords/2; |
|
1211 |
HeapWord* hr2_last = hr2->end() - 1; |
|
1212 |
||
1213 |
HeapWord* hr3_start = hr3->bottom(); |
|
1214 |
HeapWord* hr3_mid = hr3_start + HeapRegion::GrainWords/2; |
|
1215 |
HeapWord* hr3_last = hr3->end() - 1; |
|
1216 |
||
1217 |
HeapRegionRemSet* hrrs = hr0->rem_set(); |
|
1218 |
||
1219 |
// Make three references from region 0x101... |
|
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
1220 |
hrrs->add_reference((OopOrNarrowOopStar)hr1_start); |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
1221 |
hrrs->add_reference((OopOrNarrowOopStar)hr1_mid); |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
1222 |
hrrs->add_reference((OopOrNarrowOopStar)hr1_last); |
1374 | 1223 |
|
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
1224 |
hrrs->add_reference((OopOrNarrowOopStar)hr2_start); |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
1225 |
hrrs->add_reference((OopOrNarrowOopStar)hr2_mid); |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
1226 |
hrrs->add_reference((OopOrNarrowOopStar)hr2_last); |
1374 | 1227 |
|
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
1228 |
hrrs->add_reference((OopOrNarrowOopStar)hr3_start); |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
1229 |
hrrs->add_reference((OopOrNarrowOopStar)hr3_mid); |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
1230 |
hrrs->add_reference((OopOrNarrowOopStar)hr3_last); |
1374 | 1231 |
|
1232 |
// Now cause a coarsening. |
|
3262
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
1233 |
hrrs->add_reference((OopOrNarrowOopStar)hr4->bottom()); |
30d1c247fc25
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
2996
diff
changeset
|
1234 |
hrrs->add_reference((OopOrNarrowOopStar)hr5->bottom()); |
1374 | 1235 |
|
1236 |
// Now, does iteration yield these three? |
|
17108
cf72dcf9a8f2
8011724: G1: Stack allocate instances of HeapRegionRemSetIterator
johnc
parents:
13752
diff
changeset
|
1237 |
HeapRegionRemSetIterator iter(hrrs); |
1374 | 1238 |
size_t sum = 0; |
1239 |
size_t card_index; |
|
1240 |
while (iter.has_next(card_index)) { |
|
1241 |
HeapWord* card_start = |
|
1242 |
G1CollectedHeap::heap()->bot_shared()->address_for_index(card_index); |
|
1243 |
gclog_or_tty->print_cr(" Card " PTR_FORMAT ".", card_start); |
|
1244 |
sum++; |
|
1245 |
} |
|
1246 |
guarantee(sum == 11 - 3 + 2048, "Failure"); |
|
1247 |
guarantee(sum == hrrs->occupied(), "Failure"); |
|
1248 |
} |
|
1249 |
#endif |