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src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp@15c5903cf9e1 (annotated)
src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp
Mon, 03 Aug 2009 12:59:30 -0700
- author
- johnc
- date
- Mon, 03 Aug 2009 12:59:30 -0700
- changeset 1324
- 15c5903cf9e1
- parent 1187
- a2957df801a1
- child 1907
- c18cbe5936b8
- permissions
- -rw-r--r--
6865703: G1: Parallelize hot card cache cleanup
Summary: Have the GC worker threads clear the hot card cache in parallel by having each worker thread claim a chunk of the card cache and process the cards in that chunk. The size of the chunks that each thread will claim is determined at VM initialization from the size of the card cache and the number of worker threads.
Reviewed-by: jmasa, tonyp
| ysr@777 | 1 | /* |
| xdono@1014 | 2 | * Copyright 2001-2009 Sun Microsystems, Inc. All Rights Reserved. |
| ysr@777 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| ysr@777 | 4 | * |
| ysr@777 | 5 | * This code is free software; you can redistribute it and/or modify it |
| ysr@777 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| ysr@777 | 7 | * published by the Free Software Foundation. |
| ysr@777 | 8 | * |
| ysr@777 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| ysr@777 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| ysr@777 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| ysr@777 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| ysr@777 | 13 | * accompanied this code). |
| ysr@777 | 14 | * |
| ysr@777 | 15 | * You should have received a copy of the GNU General Public License version |
| ysr@777 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| ysr@777 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| ysr@777 | 18 | * |
| ysr@777 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| ysr@777 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| ysr@777 | 21 | * have any questions. |
| ysr@777 | 22 | * |
| ysr@777 | 23 | */ |
| ysr@777 | 24 | |
| ysr@777 | 25 | // Inline functions for G1CollectedHeap |
| ysr@777 | 26 | |
| ysr@777 | 27 | inline HeapRegion* |
| ysr@777 | 28 | G1CollectedHeap::heap_region_containing(const void* addr) const { |
| ysr@777 | 29 | HeapRegion* hr = _hrs->addr_to_region(addr); |
| ysr@777 | 30 | // hr can be null if addr in perm_gen |
| ysr@777 | 31 | if (hr != NULL && hr->continuesHumongous()) { |
| ysr@777 | 32 | hr = hr->humongous_start_region(); |
| ysr@777 | 33 | } |
| ysr@777 | 34 | return hr; |
| ysr@777 | 35 | } |
| ysr@777 | 36 | |
| ysr@777 | 37 | inline HeapRegion* |
| ysr@777 | 38 | G1CollectedHeap::heap_region_containing_raw(const void* addr) const { |
| tonyp@961 | 39 | assert(_g1_reserved.contains(addr), "invariant"); |
| johnc@1187 | 40 | size_t index = pointer_delta(addr, _g1_reserved.start(), 1) |
| johnc@1187 | 41 | >> HeapRegion::LogOfHRGrainBytes; |
| johnc@1187 | 42 | |
| tonyp@961 | 43 | HeapRegion* res = _hrs->at(index); |
| tonyp@961 | 44 | assert(res == _hrs->addr_to_region(addr), "sanity"); |
| ysr@777 | 45 | return res; |
| ysr@777 | 46 | } |
| ysr@777 | 47 | |
| ysr@777 | 48 | inline bool G1CollectedHeap::obj_in_cs(oop obj) { |
| ysr@777 | 49 | HeapRegion* r = _hrs->addr_to_region(obj); |
| ysr@777 | 50 | return r != NULL && r->in_collection_set(); |
| ysr@777 | 51 | } |
| ysr@777 | 52 | |
| ysr@777 | 53 | inline HeapWord* G1CollectedHeap::attempt_allocation(size_t word_size, |
| ysr@777 | 54 | bool permit_collection_pause) { |
| ysr@777 | 55 | HeapWord* res = NULL; |
| ysr@777 | 56 | |
| ysr@777 | 57 | assert( SafepointSynchronize::is_at_safepoint() || |
| ysr@777 | 58 | Heap_lock->owned_by_self(), "pre-condition of the call" ); |
| ysr@777 | 59 | |
| ysr@777 | 60 | if (_cur_alloc_region != NULL) { |
| ysr@777 | 61 | |
| ysr@777 | 62 | // If this allocation causes a region to become non empty, |
| ysr@777 | 63 | // then we need to update our free_regions count. |
| ysr@777 | 64 | |
| ysr@777 | 65 | if (_cur_alloc_region->is_empty()) { |
| ysr@777 | 66 | res = _cur_alloc_region->allocate(word_size); |
| ysr@777 | 67 | if (res != NULL) |
| ysr@777 | 68 | _free_regions--; |
| ysr@777 | 69 | } else { |
| ysr@777 | 70 | res = _cur_alloc_region->allocate(word_size); |
| ysr@777 | 71 | } |
| ysr@777 | 72 | } |
| ysr@777 | 73 | if (res != NULL) { |
| ysr@777 | 74 | if (!SafepointSynchronize::is_at_safepoint()) { |
| ysr@777 | 75 | assert( Heap_lock->owned_by_self(), "invariant" ); |
| ysr@777 | 76 | Heap_lock->unlock(); |
| ysr@777 | 77 | } |
| ysr@777 | 78 | return res; |
| ysr@777 | 79 | } |
| ysr@777 | 80 | // attempt_allocation_slow will also unlock the heap lock when appropriate. |
| ysr@777 | 81 | return attempt_allocation_slow(word_size, permit_collection_pause); |
| ysr@777 | 82 | } |
| ysr@777 | 83 | |
| ysr@777 | 84 | inline RefToScanQueue* G1CollectedHeap::task_queue(int i) { |
| ysr@777 | 85 | return _task_queues->queue(i); |
| ysr@777 | 86 | } |
| ysr@777 | 87 | |
| ysr@777 | 88 | |
| ysr@777 | 89 | inline bool G1CollectedHeap::isMarkedPrev(oop obj) const { |
| ysr@777 | 90 | return _cm->prevMarkBitMap()->isMarked((HeapWord *)obj); |
| ysr@777 | 91 | } |
| ysr@777 | 92 | |
| ysr@777 | 93 | inline bool G1CollectedHeap::isMarkedNext(oop obj) const { |
| ysr@777 | 94 | return _cm->nextMarkBitMap()->isMarked((HeapWord *)obj); |
| ysr@777 | 95 | } |
