truffle: src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp annotate

annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp @ 4910:caa4652b4414

7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle Summary: If we try to schedule an initial-mark GC in order to explicit start a conc mark cycle and it gets pre-empted by antoher GC, we should retry the attempt as long as it's appropriate for the GC cause. Reviewed-by: brutisso, johnc

author	tonyp
date	Tue, 14 Feb 2012 08:21:08 -0500
parents	d30fa85f9994
children	a9647476d1a4

rev	line source
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1 /*
4783 023652e49ac0 7121496: G1: do the per-region evacuation failure handling work in parallel johnc parents: 4781 diff changeset	2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	7 * published by the Free Software Foundation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	8 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	13 * accompanied this code).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	14 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1394 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1394 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1394 diff changeset	21 * questions.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	22 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	23 */
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_HPP
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_HPP
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	27
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	28 #include "gc_implementation/g1/concurrentMark.hpp"
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	29 #include "gc_implementation/g1/g1AllocRegion.hpp"
3778 5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3777 diff changeset	30 #include "gc_implementation/g1/g1HRPrinter.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	31 #include "gc_implementation/g1/g1RemSet.hpp"
3289 b52782ae3880 6946417: G1: Java VisualVM does not support G1 properly. jmasa parents: 3285 diff changeset	32 #include "gc_implementation/g1/g1MonitoringSupport.hpp"
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	33 #include "gc_implementation/g1/heapRegionSeq.hpp"
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	34 #include "gc_implementation/g1/heapRegionSets.hpp"
3289 b52782ae3880 6946417: G1: Java VisualVM does not support G1 properly. jmasa parents: 3285 diff changeset	35 #include "gc_implementation/shared/hSpaceCounters.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	36 #include "gc_implementation/parNew/parGCAllocBuffer.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	37 #include "memory/barrierSet.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	38 #include "memory/memRegion.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	39 #include "memory/sharedHeap.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	40
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	41 // A "G1CollectedHeap" is an implementation of a java heap for HotSpot.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	42 // It uses the "Garbage First" heap organization and algorithm, which
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	43 // may combine concurrent marking with parallel, incremental compaction of
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	44 // heap subsets that will yield large amounts of garbage.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	45
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	46 class HeapRegion;
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	47 class HRRSCleanupTask;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	48 class PermanentGenerationSpec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	49 class GenerationSpec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	50 class OopsInHeapRegionClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	51 class G1ScanHeapEvacClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	52 class ObjectClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	53 class SpaceClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	54 class CompactibleSpaceClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	55 class Space;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	56 class G1CollectorPolicy;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	57 class GenRemSet;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	58 class G1RemSet;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	59 class HeapRegionRemSetIterator;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	60 class ConcurrentMark;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	61 class ConcurrentMarkThread;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	62 class ConcurrentG1Refine;
3289 b52782ae3880 6946417: G1: Java VisualVM does not support G1 properly. jmasa parents: 3285 diff changeset	63 class GenerationCounters;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	64
1709 5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	65 typedef OverflowTaskQueue<StarTask> RefToScanQueue;
1311 2a1472c30599 4396719: Mark Sweep stack overflow on deeply nested Object arrays jcoomes parents: 1261 diff changeset	66 typedef GenericTaskQueueSet<RefToScanQueue> RefToScanQueueSet;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	67
807 d44bdab1c03d 6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55 johnc parents: 796 diff changeset	68 typedef int RegionIdx_t; // needs to hold [ 0..max_regions() )
d44bdab1c03d 6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55 johnc parents: 796 diff changeset	69 typedef int CardIdx_t; // needs to hold [ 0..CardsPerRegion )
d44bdab1c03d 6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55 johnc parents: 796 diff changeset	70
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	71 enum GCAllocPurpose {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	72 GCAllocForTenured,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	73 GCAllocForSurvived,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	74 GCAllocPurposeCount
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	75 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	76
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	77 class YoungList : public CHeapObj {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	78 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	79 G1CollectedHeap* _g1h;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	80
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	81 HeapRegion* _head;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	82
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	83 HeapRegion* _survivor_head;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	84 HeapRegion* _survivor_tail;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	85
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	86 HeapRegion* _curr;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	87
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	88 size_t _length;
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	89 size_t _survivor_length;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	90
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	91 size_t _last_sampled_rs_lengths;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	92 size_t _sampled_rs_lengths;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	93
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	94 void empty_list(HeapRegion* list);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	95
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	96 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	97 YoungList(G1CollectedHeap* g1h);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	98
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	99 void push_region(HeapRegion* hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	100 void add_survivor_region(HeapRegion* hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	101
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	102 void empty_list();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	103 bool is_empty() { return _length == 0; }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	104 size_t length() { return _length; }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	105 size_t survivor_length() { return _survivor_length; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	106
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	107 // Currently we do not keep track of the used byte sum for the
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	108 // young list and the survivors and it'd be quite a lot of work to
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	109 // do so. When we'll eventually replace the young list with
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	110 // instances of HeapRegionLinkedList we'll get that for free. So,
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	111 // we'll report the more accurate information then.
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	112 size_t eden_used_bytes() {
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	113 assert(length() >= survivor_length(), "invariant");
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	114 return (length() - survivor_length()) * HeapRegion::GrainBytes;
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	115 }
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	116 size_t survivor_used_bytes() {
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	117 return survivor_length() * HeapRegion::GrainBytes;
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	118 }
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	119
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	120 void rs_length_sampling_init();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	121 bool rs_length_sampling_more();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	122 void rs_length_sampling_next();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	123
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	124 void reset_sampled_info() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	125 _last_sampled_rs_lengths = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	126 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	127 size_t sampled_rs_lengths() { return _last_sampled_rs_lengths; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	128
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	129 // for development purposes
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	130 void reset_auxilary_lists();
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	131 void clear() { _head = NULL; _length = 0; }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	132
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	133 void clear_survivors() {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	134 _survivor_head = NULL;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	135 _survivor_tail = NULL;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	136 _survivor_length = 0;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	137 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	138
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	139 HeapRegion* first_region() { return _head; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	140 HeapRegion* first_survivor_region() { return _survivor_head; }
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	141 HeapRegion* last_survivor_region() { return _survivor_tail; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	142
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	143 // debugging
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	144 bool check_list_well_formed();
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	145 bool check_list_empty(bool check_sample = true);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	146 void print();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	147 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	148
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	149 class MutatorAllocRegion : public G1AllocRegion {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	150 protected:
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	151 virtual HeapRegion* allocate_new_region(size_t word_size, bool force);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	152 virtual void retire_region(HeapRegion* alloc_region, size_t allocated_bytes);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	153 public:
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	154 MutatorAllocRegion()
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	155 : G1AllocRegion("Mutator Alloc Region", false /* bot_updates */) { }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	156 };
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	157
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	158 // The G1 STW is alive closure.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	159 // An instance is embedded into the G1CH and used as the
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	160 // (optional) _is_alive_non_header closure in the STW
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	161 // reference processor. It is also extensively used during
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	162 // refence processing during STW evacuation pauses.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	163 class G1STWIsAliveClosure: public BoolObjectClosure {
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	164 G1CollectedHeap* _g1;
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	165 public:
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	166 G1STWIsAliveClosure(G1CollectedHeap* g1) : _g1(g1) {}
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	167 void do_object(oop p) { assert(false, "Do not call."); }
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	168 bool do_object_b(oop p);
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	169 };
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	170
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	171 class SurvivorGCAllocRegion : public G1AllocRegion {
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	172 protected:
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	173 virtual HeapRegion* allocate_new_region(size_t word_size, bool force);
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	174 virtual void retire_region(HeapRegion* alloc_region, size_t allocated_bytes);
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	175 public:
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	176 SurvivorGCAllocRegion()
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	177 : G1AllocRegion("Survivor GC Alloc Region", false /* bot_updates */) { }
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	178 };
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	179
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	180 class OldGCAllocRegion : public G1AllocRegion {
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	181 protected:
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	182 virtual HeapRegion* allocate_new_region(size_t word_size, bool force);
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	183 virtual void retire_region(HeapRegion* alloc_region, size_t allocated_bytes);
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	184 public:
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	185 OldGCAllocRegion()
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	186 : G1AllocRegion("Old GC Alloc Region", true /* bot_updates */) { }
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	187 };
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	188
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	189 class RefineCardTableEntryClosure;
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	190
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	191 class G1CollectedHeap : public SharedHeap {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	192 friend class VM_G1CollectForAllocation;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	193 friend class VM_GenCollectForPermanentAllocation;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	194 friend class VM_G1CollectFull;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	195 friend class VM_G1IncCollectionPause;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	196 friend class VMStructs;
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	197 friend class MutatorAllocRegion;
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	198 friend class SurvivorGCAllocRegion;
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	199 friend class OldGCAllocRegion;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	200
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	201 // Closures used in implementation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	202 friend class G1ParCopyHelper;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	203 friend class G1IsAliveClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	204 friend class G1EvacuateFollowersClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	205 friend class G1ParScanThreadState;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	206 friend class G1ParScanClosureSuper;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	207 friend class G1ParEvacuateFollowersClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	208 friend class G1ParTask;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	209 friend class G1FreeGarbageRegionClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	210 friend class RefineCardTableEntryClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	211 friend class G1PrepareCompactClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	212 friend class RegionSorter;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	213 friend class RegionResetter;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	214 friend class CountRCClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	215 friend class EvacPopObjClosure;
796 29e7d79232b9 6819065: G1: eliminate high serial card table clearing time apetrusenko parents: 678 diff changeset	216 friend class G1ParCleanupCTTask;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	217
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	218 // Other related classes.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	219 friend class G1MarkSweep;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	220
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	221 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	222 // The one and only G1CollectedHeap, so static functions can find it.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	223 static G1CollectedHeap* _g1h;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	224
942 2c79770d1f6e 6819085: G1: use larger and/or user settable region size tonyp parents: 941 diff changeset	225 static size_t _humongous_object_threshold_in_words;
2c79770d1f6e 6819085: G1: use larger and/or user settable region size tonyp parents: 941 diff changeset	226
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	227 // Storage for the G1 heap (excludes the permanent generation).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	228 VirtualSpace _g1_storage;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	229 MemRegion _g1_reserved;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	230
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	231 // The part of _g1_storage that is currently committed.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	232 MemRegion _g1_committed;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	233
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	234 // The master free list. It will satisfy all new region allocations.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	235 MasterFreeRegionList _free_list;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	236
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	237 // The secondary free list which contains regions that have been
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	238 // freed up during the cleanup process. This will be appended to the
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	239 // master free list when appropriate.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	240 SecondaryFreeRegionList _secondary_free_list;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	241
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	242 // It keeps track of the old regions.
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	243 MasterOldRegionSet _old_set;
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	244
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	245 // It keeps track of the humongous regions.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	246 MasterHumongousRegionSet _humongous_set;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	247
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	248 // The number of regions we could create by expansion.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	249 size_t _expansion_regions;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	250
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	251 // The block offset table for the G1 heap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	252 G1BlockOffsetSharedArray* _bot_shared;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	253
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	254 // Tears down the region sets / lists so that they are empty and the
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	255 // regions on the heap do not belong to a region set / list. The
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	256 // only exception is the humongous set which we leave unaltered. If
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	257 // free_list_only is true, it will only tear down the master free
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	258 // list. It is called before a Full GC (free_list_only == false) or
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	259 // before heap shrinking (free_list_only == true).
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	260 void tear_down_region_sets(bool free_list_only);
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	261
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	262 // Rebuilds the region sets / lists so that they are repopulated to
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	263 // reflect the contents of the heap. The only exception is the
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	264 // humongous set which was not torn down in the first place. If
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	265 // free_list_only is true, it will only rebuild the master free
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	266 // list. It is called after a Full GC (free_list_only == false) or
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	267 // after heap shrinking (free_list_only == true).
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	268 void rebuild_region_sets(bool free_list_only);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	269
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	270 // The sequence of all heap regions in the heap.
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	271 HeapRegionSeq _hrs;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	272
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	273 // Alloc region used to satisfy mutator allocation requests.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	274 MutatorAllocRegion _mutator_alloc_region;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	275
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	276 // Alloc region used to satisfy allocation requests by the GC for
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	277 // survivor objects.
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	278 SurvivorGCAllocRegion _survivor_gc_alloc_region;
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	279
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	280 // Alloc region used to satisfy allocation requests by the GC for
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	281 // old objects.
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	282 OldGCAllocRegion _old_gc_alloc_region;
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	283
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	284 // The last old region we allocated to during the last GC.
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	285 // Typically, it is not full so we should re-use it during the next GC.
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	286 HeapRegion* _retained_old_gc_alloc_region;
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	287
4781 bacb651cf5bf 7113006: G1: excessive ergo output when an evac failure happens tonyp parents: 4728 diff changeset	288 // It specifies whether we should attempt to expand the heap after a
bacb651cf5bf 7113006: G1: excessive ergo output when an evac failure happens tonyp parents: 4728 diff changeset	289 // region allocation failure. If heap expansion fails we set this to
bacb651cf5bf 7113006: G1: excessive ergo output when an evac failure happens tonyp parents: 4728 diff changeset	290 // false so that we don't re-attempt the heap expansion (it's likely
bacb651cf5bf 7113006: G1: excessive ergo output when an evac failure happens tonyp parents: 4728 diff changeset	291 // that subsequent expansion attempts will also fail if one fails).
bacb651cf5bf 7113006: G1: excessive ergo output when an evac failure happens tonyp parents: 4728 diff changeset	292 // Currently, it is only consulted during GC and it's reset at the
bacb651cf5bf 7113006: G1: excessive ergo output when an evac failure happens tonyp parents: 4728 diff changeset	293 // start of each GC.
bacb651cf5bf 7113006: G1: excessive ergo output when an evac failure happens tonyp parents: 4728 diff changeset	294 bool _expand_heap_after_alloc_failure;
bacb651cf5bf 7113006: G1: excessive ergo output when an evac failure happens tonyp parents: 4728 diff changeset	295
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	296 // It resets the mutator alloc region before new allocations can take place.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	297 void init_mutator_alloc_region();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	298
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	299 // It releases the mutator alloc region.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	300 void release_mutator_alloc_region();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	301
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	302 // It initializes the GC alloc regions at the start of a GC.
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	303 void init_gc_alloc_regions();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	304
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	305 // It releases the GC alloc regions at the end of a GC.
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	306 void release_gc_alloc_regions();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	307
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	308 // It does any cleanup that needs to be done on the GC alloc regions
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	309 // before a Full GC.
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	310 void abandon_gc_alloc_regions();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	311
3289 b52782ae3880 6946417: G1: Java VisualVM does not support G1 properly. jmasa parents: 3285 diff changeset	312 // Helper for monitoring and management support.
b52782ae3880 6946417: G1: Java VisualVM does not support G1 properly. jmasa parents: 3285 diff changeset	313 G1MonitoringSupport* _g1mm;
b52782ae3880 6946417: G1: Java VisualVM does not support G1 properly. jmasa parents: 3285 diff changeset	314
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	315 // Determines PLAB size for a particular allocation purpose.
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	316 static size_t desired_plab_sz(GCAllocPurpose purpose);
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	317
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	318 // Outside of GC pauses, the number of bytes used in all regions other
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	319 // than the current allocation region.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	320 size_t _summary_bytes_used;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	321
526 818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	322 // This is used for a quick test on whether a reference points into
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	323 // the collection set or not. Basically, we have an array, with one
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	324 // byte per region, and that byte denotes whether the corresponding
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	325 // region is in the collection set or not. The entry corresponding
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	326 // the bottom of the heap, i.e., region 0, is pointed to by
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	327 // _in_cset_fast_test_base. The _in_cset_fast_test field has been
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	328 // biased so that it actually points to address 0 of the address
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	329 // space, to make the test as fast as possible (we can simply shift
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	330 // the address to address into it, instead of having to subtract the
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	331 // bottom of the heap from the address before shifting it; basically
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	332 // it works in the same way the card table works).
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	333 bool* _in_cset_fast_test;
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	334
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	335 // The allocated array used for the fast test on whether a reference
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	336 // points into the collection set or not. This field is also used to
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	337 // free the array.
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	338 bool* _in_cset_fast_test_base;
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	339
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	340 // The length of the _in_cset_fast_test_base array.
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	341 size_t _in_cset_fast_test_length;
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	342
353 9bb2c10ac07b 6723570: G1: assertion failure: p == current_top or oop(p)->is_oop(),"p is not a block start" (revisited!) iveresov parents: 342 diff changeset	343 volatile unsigned _gc_time_stamp;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	344
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	345 size_t* _surviving_young_words;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	346
3778 5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3777 diff changeset	347 G1HRPrinter _hr_printer;
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3777 diff changeset	348
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	349 void setup_surviving_young_words();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	350 void update_surviving_young_words(size_t* surv_young_words);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	351 void cleanup_surviving_young_words();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	352
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	353 // It decides whether an explicit GC should start a concurrent cycle
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	354 // instead of doing a STW GC. Currently, a concurrent cycle is
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	355 // explicitly started if:
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	356 // (a) cause == _gc_locker and +GCLockerInvokesConcurrent, or
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	357 // (b) cause == _java_lang_system_gc and +ExplicitGCInvokesConcurrent.
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	358 // (c) cause == _g1_humongous_allocation
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	359 bool should_do_concurrent_full_gc(GCCause::Cause cause);
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	360
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	361 // Keeps track of how many "full collections" (i.e., Full GCs or
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	362 // concurrent cycles) we have completed. The number of them we have
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	363 // started is maintained in _total_full_collections in CollectedHeap.
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	364 volatile unsigned int _full_collections_completed;
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	365
3285 49a67202bc67 7011855: G1: non-product flag to artificially grow the heap tonyp parents: 2435 diff changeset	366 // This is a non-product method that is helpful for testing. It is
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap tonyp parents: 2435 diff changeset	367 // called at the end of a GC and artificially expands the heap by
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap tonyp parents: 2435 diff changeset	368 // allocating a number of dead regions. This way we can induce very
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap tonyp parents: 2435 diff changeset	369 // frequent marking cycles and stress the cleanup / concurrent
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap tonyp parents: 2435 diff changeset	370 // cleanup code more (as all the regions that will be allocated by
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap tonyp parents: 2435 diff changeset	371 // this method will be found dead by the marking cycle).
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap tonyp parents: 2435 diff changeset	372 void allocate_dummy_regions() PRODUCT_RETURN;
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap tonyp parents: 2435 diff changeset	373
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	374 // These are macros so that, if the assert fires, we get the correct
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	375 // line number, file, etc.
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	376
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	377 #define heap_locking_asserts_err_msg(_extra_message_) \
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	378 err_msg("%s : Heap_lock locked: %s, at safepoint: %s, is VM thread: %s", \
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	379 (_extra_message_), \
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	380 BOOL_TO_STR(Heap_lock->owned_by_self()), \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	381 BOOL_TO_STR(SafepointSynchronize::is_at_safepoint()), \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	382 BOOL_TO_STR(Thread::current()->is_VM_thread()))
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	383
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	384 #define assert_heap_locked() \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	385 do { \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	386 assert(Heap_lock->owned_by_self(), \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	387 heap_locking_asserts_err_msg("should be holding the Heap_lock")); \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	388 } while (0)
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	389
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	390 #define assert_heap_locked_or_at_safepoint(_should_be_vm_thread_) \
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	391 do { \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	392 assert(Heap_lock->owned_by_self() \|\| \
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	393 (SafepointSynchronize::is_at_safepoint() && \
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	394 ((_should_be_vm_thread_) == Thread::current()->is_VM_thread())), \
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	395 heap_locking_asserts_err_msg("should be holding the Heap_lock or " \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	396 "should be at a safepoint")); \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	397 } while (0)
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	398
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	399 #define assert_heap_locked_and_not_at_safepoint() \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	400 do { \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	401 assert(Heap_lock->owned_by_self() && \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	402 !SafepointSynchronize::is_at_safepoint(), \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	403 heap_locking_asserts_err_msg("should be holding the Heap_lock and " \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	404 "should not be at a safepoint")); \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	405 } while (0)
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	406
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	407 #define assert_heap_not_locked() \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	408 do { \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	409 assert(!Heap_lock->owned_by_self(), \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	410 heap_locking_asserts_err_msg("should not be holding the Heap_lock")); \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	411 } while (0)
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	412
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	413 #define assert_heap_not_locked_and_not_at_safepoint() \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	414 do { \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	415 assert(!Heap_lock->owned_by_self() && \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	416 !SafepointSynchronize::is_at_safepoint(), \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	417 heap_locking_asserts_err_msg("should not be holding the Heap_lock and " \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	418 "should not be at a safepoint")); \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	419 } while (0)
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	420
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	421 #define assert_at_safepoint(_should_be_vm_thread_) \
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	422 do { \
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	423 assert(SafepointSynchronize::is_at_safepoint() && \
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	424 ((_should_be_vm_thread_) == Thread::current()->is_VM_thread()), \
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	425 heap_locking_asserts_err_msg("should be at a safepoint")); \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	426 } while (0)
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	427
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	428 #define assert_not_at_safepoint() \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	429 do { \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	430 assert(!SafepointSynchronize::is_at_safepoint(), \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	431 heap_locking_asserts_err_msg("should not be at a safepoint")); \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	432 } while (0)
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	433
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	434 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	435
3823 14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	436 // The young region list.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	437 YoungList* _young_list;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	438
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	439 // The current policy object for the collector.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	440 G1CollectorPolicy* _g1_policy;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	441
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	442 // This is the second level of trying to allocate a new region. If
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	443 // new_region() didn't find a region on the free_list, this call will
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	444 // check whether there's anything available on the
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	445 // secondary_free_list and/or wait for more regions to appear on
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	446 // that list, if _free_regions_coming is set.
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	447 HeapRegion* new_region_try_secondary_free_list();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	448
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	449 // Try to allocate a single non-humongous HeapRegion sufficient for
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	450 // an allocation of the given word_size. If do_expand is true,
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	451 // attempt to expand the heap if necessary to satisfy the allocation
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	452 // request.
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	453 HeapRegion* new_region(size_t word_size, bool do_expand);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	454
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	455 // Attempt to satisfy a humongous allocation request of the given
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	456 // size by finding a contiguous set of free regions of num_regions
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	457 // length and remove them from the master free list. Return the
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	458 // index of the first region or G1_NULL_HRS_INDEX if the search
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	459 // was unsuccessful.
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	460 size_t humongous_obj_allocate_find_first(size_t num_regions,
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	461 size_t word_size);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	462
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	463 // Initialize a contiguous set of free regions of length num_regions
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	464 // and starting at index first so that they appear as a single
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	465 // humongous region.
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	466 HeapWord* humongous_obj_allocate_initialize_regions(size_t first,
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	467 size_t num_regions,
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	468 size_t word_size);
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	469
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	470 // Attempt to allocate a humongous object of the given size. Return
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	471 // NULL if unsuccessful.
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	472 HeapWord* humongous_obj_allocate(size_t word_size);
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	473
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	474 // The following two methods, allocate_new_tlab() and
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	475 // mem_allocate(), are the two main entry points from the runtime
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	476 // into the G1's allocation routines. They have the following
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	477 // assumptions:
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	478 //
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	479 // * They should both be called outside safepoints.
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	480 //
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	481 // * They should both be called without holding the Heap_lock.
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	482 //
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	483 // * All allocation requests for new TLABs should go to
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	484 // allocate_new_tlab().
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	485 //
3774 c9ca3f51cf41 6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap tonyp parents: 3772 diff changeset	486 // * All non-TLAB allocation requests should go to mem_allocate().
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	487 //
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	488 // * If either call cannot satisfy the allocation request using the
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	489 // current allocating region, they will try to get a new one. If
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	490 // this fails, they will attempt to do an evacuation pause and
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	491 // retry the allocation.
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	492 //
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	493 // * If all allocation attempts fail, even after trying to schedule
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	494 // an evacuation pause, allocate_new_tlab() will return NULL,
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	495 // whereas mem_allocate() will attempt a heap expansion and/or
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	496 // schedule a Full GC.
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	497 //
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	498 // * We do not allow humongous-sized TLABs. So, allocate_new_tlab
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	499 // should never be called with word_size being humongous. All
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	500 // humongous allocation requests should go to mem_allocate() which
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	501 // will satisfy them with a special path.
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	502
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	503 virtual HeapWord* allocate_new_tlab(size_t word_size);
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	504
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	505 virtual HeapWord* mem_allocate(size_t word_size,
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	506 bool* gc_overhead_limit_was_exceeded);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	507
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	508 // The following three methods take a gc_count_before_ret
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	509 // parameter which is used to return the GC count if the method
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	510 // returns NULL. Given that we are required to read the GC count
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	511 // while holding the Heap_lock, and these paths will take the
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	512 // Heap_lock at some point, it's easier to get them to read the GC
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	513 // count while holding the Heap_lock before they return NULL instead
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	514 // of the caller (namely: mem_allocate()) having to also take the
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	515 // Heap_lock just to read the GC count.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	516
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	517 // First-level mutator allocation attempt: try to allocate out of
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	518 // the mutator alloc region without taking the Heap_lock. This
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	519 // should only be used for non-humongous allocations.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	520 inline HeapWord* attempt_allocation(size_t word_size,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	521 unsigned int* gc_count_before_ret);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	522
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	523 // Second-level mutator allocation attempt: take the Heap_lock and
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	524 // retry the allocation attempt, potentially scheduling a GC
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	525 // pause. This should only be used for non-humongous allocations.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	526 HeapWord* attempt_allocation_slow(size_t word_size,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	527 unsigned int* gc_count_before_ret);
2134 b158bed62ef5 6994297: G1: do first-level slow-path allocations with a CAS tonyp parents: 2133 diff changeset	528
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	529 // Takes the Heap_lock and attempts a humongous allocation. It can
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	530 // potentially schedule a GC pause.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	531 HeapWord* attempt_allocation_humongous(size_t word_size,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	532 unsigned int* gc_count_before_ret);
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	533
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	534 // Allocation attempt that should be called during safepoints (e.g.,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	535 // at the end of a successful GC). expect_null_mutator_alloc_region
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	536 // specifies whether the mutator alloc region is expected to be NULL
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	537 // or not.
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	538 HeapWord* attempt_allocation_at_safepoint(size_t word_size,
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	539 bool expect_null_mutator_alloc_region);
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	540
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	541 // It dirties the cards that cover the block so that so that the post
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	542 // write barrier never queues anything when updating objects on this
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	543 // block. It is assumed (and in fact we assert) that the block
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	544 // belongs to a young region.
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	545 inline void dirty_young_block(HeapWord* start, size_t word_size);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	546
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	547 // Allocate blocks during garbage collection. Will ensure an
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	548 // allocation region, either by picking one or expanding the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	549 // heap, and then allocate a block of the given size. The block
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	550 // may not be a humongous - it must fit into a single heap region.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	551 HeapWord* par_allocate_during_gc(GCAllocPurpose purpose, size_t word_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	552
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	553 HeapWord* allocate_during_gc_slow(GCAllocPurpose purpose,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	554 HeapRegion* alloc_region,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	555 bool par,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	556 size_t word_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	557
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	558 // Ensure that no further allocations can happen in "r", bearing in mind
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	559 // that parallel threads might be attempting allocations.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	560 void par_allocate_remaining_space(HeapRegion* r);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	561
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	562 // Allocation attempt during GC for a survivor object / PLAB.
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	563 inline HeapWord* survivor_attempt_allocation(size_t word_size);
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	564
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	565 // Allocation attempt during GC for an old object / PLAB.
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	566 inline HeapWord* old_attempt_allocation(size_t word_size);
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	567
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	568 // These methods are the "callbacks" from the G1AllocRegion class.
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	569
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	570 // For mutator alloc regions.
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	571 HeapRegion* new_mutator_alloc_region(size_t word_size, bool force);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	572 void retire_mutator_alloc_region(HeapRegion* alloc_region,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	573 size_t allocated_bytes);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	574
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	575 // For GC alloc regions.
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	576 HeapRegion* new_gc_alloc_region(size_t word_size, size_t count,
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	577 GCAllocPurpose ap);
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	578 void retire_gc_alloc_region(HeapRegion* alloc_region,
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	579 size_t allocated_bytes, GCAllocPurpose ap);
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	580
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	581 // - if explicit_gc is true, the GC is for a System.gc() or a heap
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	582 // inspection request and should collect the entire heap
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	583 // - if clear_all_soft_refs is true, all soft references should be
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	584 // cleared during the GC
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	585 // - if explicit_gc is false, word_size describes the allocation that
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	586 // the GC should attempt (at least) to satisfy
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	587 // - it returns false if it is unable to do the collection due to the
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	588 // GC locker being active, true otherwise
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	589 bool do_collection(bool explicit_gc,
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	590 bool clear_all_soft_refs,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	591 size_t word_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	592
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	593 // Callback from VM_G1CollectFull operation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	594 // Perform a full collection.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	595 void do_full_collection(bool clear_all_soft_refs);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	596
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	597 // Resize the heap if necessary after a full collection. If this is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	598 // after a collect-for allocation, "word_size" is the allocation size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	599 // and will be considered part of the used portion of the heap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	600 void resize_if_necessary_after_full_collection(size_t word_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	601
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	602 // Callback from VM_G1CollectForAllocation operation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	603 // This function does everything necessary/possible to satisfy a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	604 // failed allocation request (including collection, expansion, etc.)
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	605 HeapWord* satisfy_failed_allocation(size_t word_size, bool* succeeded);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	606
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	607 // Attempting to expand the heap sufficiently
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	608 // to support an allocation of the given "word_size". If
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	609 // successful, perform the allocation and return the address of the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	610 // allocated block, or else "NULL".
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	611 HeapWord* expand_and_allocate(size_t word_size);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	612
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	613 // Process any reference objects discovered during
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	614 // an incremental evacuation pause.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	615 void process_discovered_references();
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	616
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	617 // Enqueue any remaining discovered references
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	618 // after processing.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	619 void enqueue_discovered_references();
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	620
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	621 public:
3289 b52782ae3880 6946417: G1: Java VisualVM does not support G1 properly. jmasa parents: 3285 diff changeset	622
3980 8229bd737950 7075646: G1: fix inconsistencies in the monitoring data tonyp parents: 3979 diff changeset	623 G1MonitoringSupport* g1mm() {
8229bd737950 7075646: G1: fix inconsistencies in the monitoring data tonyp parents: 3979 diff changeset	624 assert(_g1mm != NULL, "should have been initialized");
8229bd737950 7075646: G1: fix inconsistencies in the monitoring data tonyp parents: 3979 diff changeset	625 return _g1mm;
8229bd737950 7075646: G1: fix inconsistencies in the monitoring data tonyp parents: 3979 diff changeset	626 }
3289 b52782ae3880 6946417: G1: Java VisualVM does not support G1 properly. jmasa parents: 3285 diff changeset	627
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	628 // Expand the garbage-first heap by at least the given size (in bytes!).
2188 c33825b68624 6923430: G1: assert(res != 0,"This should have worked.") johnc parents: 2173 diff changeset	629 // Returns true if the heap was expanded by the requested amount;
c33825b68624 6923430: G1: assert(res != 0,"This should have worked.") johnc parents: 2173 diff changeset	630 // false otherwise.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	631 // (Rounds up to a HeapRegion boundary.)
2188 c33825b68624 6923430: G1: assert(res != 0,"This should have worked.") johnc parents: 2173 diff changeset	632 bool expand(size_t expand_bytes);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	633
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	634 // Do anything common to GC's.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	635 virtual void gc_prologue(bool full);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	636 virtual void gc_epilogue(bool full);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	637
526 818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	638 // We register a region with the fast "in collection set" test. We
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	639 // simply set to true the array slot corresponding to this region.
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	640 void register_region_with_in_cset_fast_test(HeapRegion* r) {
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	641 assert(_in_cset_fast_test_base != NULL, "sanity");
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	642 assert(r->in_collection_set(), "invariant");
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	643 size_t index = r->hrs_index();
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	644 assert(index < _in_cset_fast_test_length, "invariant");
526 818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	645 assert(!_in_cset_fast_test_base[index], "invariant");
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	646 _in_cset_fast_test_base[index] = true;
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	647 }
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	648
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	649 // This is a fast test on whether a reference points into the
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	650 // collection set or not. It does not assume that the reference
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	651 // points into the heap; if it doesn't, it will return false.
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	652 bool in_cset_fast_test(oop obj) {
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	653 assert(_in_cset_fast_test != NULL, "sanity");
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	654 if (_g1_committed.contains((HeapWord*) obj)) {
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	655 // no need to subtract the bottom of the heap from obj,
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	656 // _in_cset_fast_test is biased
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	657 size_t index = ((size_t) obj) >> HeapRegion::LogOfHRGrainBytes;
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	658 bool ret = _in_cset_fast_test[index];
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	659 // let's make sure the result is consistent with what the slower
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	660 // test returns
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	661 assert( ret \|\| !obj_in_cs(obj), "sanity");
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	662 assert(!ret \|\| obj_in_cs(obj), "sanity");
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	663 return ret;
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	664 } else {
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	665 return false;
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	666 }
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	667 }
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	668
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	669 void clear_cset_fast_test() {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	670 assert(_in_cset_fast_test_base != NULL, "sanity");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	671 memset(_in_cset_fast_test_base, false,
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	672 _in_cset_fast_test_length * sizeof(bool));
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	673 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	674
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	675 // This is called at the end of either a concurrent cycle or a Full
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	676 // GC to update the number of full collections completed. Those two
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	677 // can happen in a nested fashion, i.e., we start a concurrent
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	678 // cycle, a Full GC happens half-way through it which ends first,
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	679 // and then the cycle notices that a Full GC happened and ends
2030 fb712ff22571 7000559: G1: assertion failure !outer \|\| (full_collections_started == _full_collections_completed + 1) tonyp parents: 1991 diff changeset	680 // too. The concurrent parameter is a boolean to help us do a bit
fb712ff22571 7000559: G1: assertion failure !outer \|\| (full_collections_started == _full_collections_completed + 1) tonyp parents: 1991 diff changeset	681 // tighter consistency checking in the method. If concurrent is
fb712ff22571 7000559: G1: assertion failure !outer \|\| (full_collections_started == _full_collections_completed + 1) tonyp parents: 1991 diff changeset	682 // false, the caller is the inner caller in the nesting (i.e., the
fb712ff22571 7000559: G1: assertion failure !outer \|\| (full_collections_started == _full_collections_completed + 1) tonyp parents: 1991 diff changeset	683 // Full GC). If concurrent is true, the caller is the outer caller
fb712ff22571 7000559: G1: assertion failure !outer \|\| (full_collections_started == _full_collections_completed + 1) tonyp parents: 1991 diff changeset	684 // in this nesting (i.e., the concurrent cycle). Further nesting is
fb712ff22571 7000559: G1: assertion failure !outer \|\| (full_collections_started == _full_collections_completed + 1) tonyp parents: 1991 diff changeset	685 // not currently supported. The end of the this call also notifies
fb712ff22571 7000559: G1: assertion failure !outer \|\| (full_collections_started == _full_collections_completed + 1) tonyp parents: 1991 diff changeset	686 // the FullGCCount_lock in case a Java thread is waiting for a full
fb712ff22571 7000559: G1: assertion failure !outer \|\| (full_collections_started == _full_collections_completed + 1) tonyp parents: 1991 diff changeset	687 // GC to happen (e.g., it called System.gc() with
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	688 // +ExplicitGCInvokesConcurrent).
2030 fb712ff22571 7000559: G1: assertion failure !outer \|\| (full_collections_started == _full_collections_completed + 1) tonyp parents: 1991 diff changeset	689 void increment_full_collections_completed(bool concurrent);
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	690
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	691 unsigned int full_collections_completed() {
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	692 return _full_collections_completed;
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	693 }
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	694
3778 5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3777 diff changeset	695 G1HRPrinter* hr_printer() { return &_hr_printer; }
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3777 diff changeset	696
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	697 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	698
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	699 // Shrink the garbage-first heap by at most the given size (in bytes!).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	700 // (Rounds down to a HeapRegion boundary.)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	701 virtual void shrink(size_t expand_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	702 void shrink_helper(size_t expand_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	703
1709 5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	704 #if TASKQUEUE_STATS
5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	705 static void print_taskqueue_stats_hdr(outputStream* const st = gclog_or_tty);
5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	706 void print_taskqueue_stats(outputStream* const st = gclog_or_tty) const;
5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	707 void reset_taskqueue_stats();
5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	708 #endif // TASKQUEUE_STATS
5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	709
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	710 // Schedule the VM operation that will do an evacuation pause to
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	711 // satisfy an allocation request of word_size. *succeeded will
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	712 // return whether the VM operation was successful (it did do an
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	713 // evacuation pause) or not (another thread beat us to it or the GC
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	714 // locker was active). Given that we should not be holding the
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	715 // Heap_lock when we enter this method, we will pass the
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	716 // gc_count_before (i.e., total_collections()) as a parameter since
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	717 // it has to be read while holding the Heap_lock. Currently, both
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	718 // methods that call do_collection_pause() release the Heap_lock
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	719 // before the call, so it's easy to read gc_count_before just before.
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	720 HeapWord* do_collection_pause(size_t word_size,
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	721 unsigned int gc_count_before,
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	722 bool* succeeded);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	723
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	724 // The guts of the incremental collection pause, executed by the vm
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	725 // thread. It returns false if it is unable to do the collection due
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	726 // to the GC locker being active, true otherwise
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	727 bool do_collection_pause_at_safepoint(double target_pause_time_ms);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	728
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	729 // Actually do the work of evacuating the collection set.
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	730 void evacuate_collection_set();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	731
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	732 // The g1 remembered set of the heap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	733 G1RemSet* _g1_rem_set;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	734 // And it's mod ref barrier set, used to track updates for the above.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	735 ModRefBarrierSet* _mr_bs;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	736
616 4f360ec815ba 6720309: G1: don't synchronously update RSet during evacuation pauses iveresov parents: 545 diff changeset	737 // A set of cards that cover the objects for which the Rsets should be updated
4f360ec815ba 6720309: G1: don't synchronously update RSet during evacuation pauses iveresov parents: 545 diff changeset	738 // concurrently after the collection.
4f360ec815ba 6720309: G1: don't synchronously update RSet during evacuation pauses iveresov parents: 545 diff changeset	739 DirtyCardQueueSet _dirty_card_queue_set;
4f360ec815ba 6720309: G1: don't synchronously update RSet during evacuation pauses iveresov parents: 545 diff changeset	740
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	741 // The Heap Region Rem Set Iterator.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	742 HeapRegionRemSetIterator** _rem_set_iterator;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	743
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	744 // The closure used to refine a single card.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	745 RefineCardTableEntryClosure* _refine_cte_cl;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	746
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	747 // A function to check the consistency of dirty card logs.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	748 void check_ct_logs_at_safepoint();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	749
1705 2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	750 // A DirtyCardQueueSet that is used to hold cards that contain
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	751 // references into the current collection set. This is used to
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	752 // update the remembered sets of the regions in the collection
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	753 // set in the event of an evacuation failure.
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	754 DirtyCardQueueSet _into_cset_dirty_card_queue_set;
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	755
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	756 // After a collection pause, make the regions in the CS into free
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	757 // regions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	758 void free_collection_set(HeapRegion* cs_head);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	759
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	760 // Abandon the current collection set without recording policy
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	761 // statistics or updating free lists.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	762 void abandon_collection_set(HeapRegion* cs_head);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	763
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	764 // Applies "scan_non_heap_roots" to roots outside the heap,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	765 // "scan_rs" to roots inside the heap (having done "set_region" to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	766 // indicate the region in which the root resides), and does "scan_perm"
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	767 // (setting the generation to the perm generation.) If "scan_rs" is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	768 // NULL, then this step is skipped. The "worker_i"
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	769 // param is for use with parallel roots processing, and should be
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	770 // the "i" of the calling parallel worker thread's work(i) function.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	771 // In the sequential case this param will be ignored.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	772 void g1_process_strong_roots(bool collecting_perm_gen,
4910 caa4652b4414 7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle tonyp parents: 4836 diff changeset	773 ScanningOption so,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	774 OopClosure* scan_non_heap_roots,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	775 OopsInHeapRegionClosure* scan_rs,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	776 OopsInGenClosure* scan_perm,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	777 int worker_i);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	778
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	779 // Apply "blk" to all the weak roots of the system. These include
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	780 // JNI weak roots, the code cache, system dictionary, symbol table,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	781 // string table, and referents of reachable weak refs.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	782 void g1_process_weak_roots(OopClosure* root_closure,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	783 OopClosure* non_root_closure);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	784
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	785 // Frees a non-humongous region by initializing its contents and
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	786 // adding it to the free list that's passed as a parameter (this is
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	787 // usually a local list which will be appended to the master free
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	788 // list later). The used bytes of freed regions are accumulated in
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	789 // pre_used. If par is true, the region's RSet will not be freed
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	790 // up. The assumption is that this will be done later.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	791 void free_region(HeapRegion* hr,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	792 size_t* pre_used,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	793 FreeRegionList* free_list,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	794 bool par);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	795
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	796 // Frees a humongous region by collapsing it into individual regions
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	797 // and calling free_region() for each of them. The freed regions
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	798 // will be added to the free list that's passed as a parameter (this
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	799 // is usually a local list which will be appended to the master free
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	800 // list later). The used bytes of freed regions are accumulated in
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	801 // pre_used. If par is true, the region's RSet will not be freed
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	802 // up. The assumption is that this will be done later.
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	803 void free_humongous_region(HeapRegion* hr,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	804 size_t* pre_used,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	805 FreeRegionList* free_list,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	806 HumongousRegionSet* humongous_proxy_set,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	807 bool par);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	808
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	809 // Notifies all the necessary spaces that the committed space has
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	810 // been updated (either expanded or shrunk). It should be called
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	811 // after _g1_storage is updated.
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	812 void update_committed_space(HeapWord* old_end, HeapWord* new_end);
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	813
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	814 // The concurrent marker (and the thread it runs in.)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	815 ConcurrentMark* _cm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	816 ConcurrentMarkThread* _cmThread;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	817 bool _mark_in_progress;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	818
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	819 // The concurrent refiner.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	820 ConcurrentG1Refine* _cg1r;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	821
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	822 // The parallel task queues
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	823 RefToScanQueueSet *_task_queues;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	824
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	825 // True iff a evacuation has failed in the current collection.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	826 bool _evacuation_failed;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	827
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	828 // Set the attribute indicating whether evacuation has failed in the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	829 // current collection.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	830 void set_evacuation_failed(bool b) { _evacuation_failed = b; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	831
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	832 // Failed evacuations cause some logical from-space objects to have
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	833 // forwarding pointers to themselves. Reset them.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	834 void remove_self_forwarding_pointers();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	835
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	836 // When one is non-null, so is the other. Together, they each pair is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	837 // an object with a preserved mark, and its mark value.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	838 GrowableArray<oop>* _objs_with_preserved_marks;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	839 GrowableArray<markOop>* _preserved_marks_of_objs;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	840
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	841 // Preserve the mark of "obj", if necessary, in preparation for its mark
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	842 // word being overwritten with a self-forwarding-pointer.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	843 void preserve_mark_if_necessary(oop obj, markOop m);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	844
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	845 // The stack of evac-failure objects left to be scanned.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	846 GrowableArray<oop>* _evac_failure_scan_stack;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	847 // The closure to apply to evac-failure objects.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	848
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	849 OopsInHeapRegionClosure* _evac_failure_closure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	850 // Set the field above.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	851 void
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	852 set_evac_failure_closure(OopsInHeapRegionClosure* evac_failure_closure) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	853 _evac_failure_closure = evac_failure_closure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	854 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	855
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	856 // Push "obj" on the scan stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	857 void push_on_evac_failure_scan_stack(oop obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	858 // Process scan stack entries until the stack is empty.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	859 void drain_evac_failure_scan_stack();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	860 // True iff an invocation of "drain_scan_stack" is in progress; to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	861 // prevent unnecessary recursion.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	862 bool _drain_in_progress;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	863
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	864 // Do any necessary initialization for evacuation-failure handling.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	865 // "cl" is the closure that will be used to process evac-failure
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	866 // objects.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	867 void init_for_evac_failure(OopsInHeapRegionClosure* cl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	868 // Do any necessary cleanup for evacuation-failure handling data
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	869 // structures.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	870 void finalize_for_evac_failure();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	871
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	872 // An attempt to evacuate "obj" has failed; take necessary steps.
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	873 oop handle_evacuation_failure_par(OopsInHeapRegionClosure* cl, oop obj);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	874 void handle_evacuation_failure_common(oop obj, markOop m);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	875
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	876 // ("Weak") Reference processing support.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	877 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	878 // G1 has 2 instances of the referece processor class. One
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	879 // (_ref_processor_cm) handles reference object discovery
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	880 // and subsequent processing during concurrent marking cycles.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	881 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	882 // The other (_ref_processor_stw) handles reference object
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	883 // discovery and processing during full GCs and incremental
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	884 // evacuation pauses.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	885 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	886 // During an incremental pause, reference discovery will be
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	887 // temporarily disabled for _ref_processor_cm and will be
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	888 // enabled for _ref_processor_stw. At the end of the evacuation
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	889 // pause references discovered by _ref_processor_stw will be
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	890 // processed and discovery will be disabled. The previous
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	891 // setting for reference object discovery for _ref_processor_cm
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	892 // will be re-instated.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	893 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	894 // At the start of marking:
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	895 // * Discovery by the CM ref processor is verified to be inactive
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	896 // and it's discovered lists are empty.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	897 // * Discovery by the CM ref processor is then enabled.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	898 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	899 // At the end of marking:
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	900 // * Any references on the CM ref processor's discovered
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	901 // lists are processed (possibly MT).
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	902 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	903 // At the start of full GC we:
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	904 // * Disable discovery by the CM ref processor and
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	905 // empty CM ref processor's discovered lists
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	906 // (without processing any entries).
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	907 // * Verify that the STW ref processor is inactive and it's
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	908 // discovered lists are empty.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	909 // * Temporarily set STW ref processor discovery as single threaded.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	910 // * Temporarily clear the STW ref processor's _is_alive_non_header
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	911 // field.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	912 // * Finally enable discovery by the STW ref processor.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	913 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	914 // The STW ref processor is used to record any discovered
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	915 // references during the full GC.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	916 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	917 // At the end of a full GC we:
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	918 // * Enqueue any reference objects discovered by the STW ref processor
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	919 // that have non-live referents. This has the side-effect of
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	920 // making the STW ref processor inactive by disabling discovery.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	921 // * Verify that the CM ref processor is still inactive
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	922 // and no references have been placed on it's discovered
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	923 // lists (also checked as a precondition during initial marking).
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	924
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	925 // The (stw) reference processor...
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	926 ReferenceProcessor* _ref_processor_stw;
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	927
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	928 // During reference object discovery, the _is_alive_non_header
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	929 // closure (if non-null) is applied to the referent object to
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	930 // determine whether the referent is live. If so then the
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	931 // reference object does not need to be 'discovered' and can
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	932 // be treated as a regular oop. This has the benefit of reducing
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	933 // the number of 'discovered' reference objects that need to
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	934 // be processed.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	935 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	936 // Instance of the is_alive closure for embedding into the
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	937 // STW reference processor as the _is_alive_non_header field.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	938 // Supplying a value for the _is_alive_non_header field is
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	939 // optional but doing so prevents unnecessary additions to
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	940 // the discovered lists during reference discovery.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	941 G1STWIsAliveClosure _is_alive_closure_stw;
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	942
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	943 // The (concurrent marking) reference processor...
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	944 ReferenceProcessor* _ref_processor_cm;
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	945
2037 b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 2030 diff changeset	946 // Instance of the concurrent mark is_alive closure for embedding
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	947 // into the Concurrent Marking reference processor as the
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	948 // _is_alive_non_header field. Supplying a value for the
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	949 // _is_alive_non_header field is optional but doing so prevents
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	950 // unnecessary additions to the discovered lists during reference
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	951 // discovery.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	952 G1CMIsAliveClosure _is_alive_closure_cm;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	953
4709 fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	954 // Cache used by G1CollectedHeap::start_cset_region_for_worker().
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	955 HeapRegion** _worker_cset_start_region;
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	956
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	957 // Time stamp to validate the regions recorded in the cache
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	958 // used by G1CollectedHeap::start_cset_region_for_worker().
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	959 // The heap region entry for a given worker is valid iff
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	960 // the associated time stamp value matches the current value
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	961 // of G1CollectedHeap::_gc_time_stamp.
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	962 unsigned int* _worker_cset_start_region_time_stamp;
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	963
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	964 enum G1H_process_strong_roots_tasks {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	965 G1H_PS_filter_satb_buffers,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	966 G1H_PS_refProcessor_oops_do,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	967 // Leave this one last.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	968 G1H_PS_NumElements
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	969 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	970
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	971 SubTasksDone* _process_strong_tasks;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	972
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	973 volatile bool _free_regions_coming;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	974
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	975 public:
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1718 diff changeset	976
8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1718 diff changeset	977 SubTasksDone* process_strong_tasks() { return _process_strong_tasks; }
8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1718 diff changeset	978
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	979 void set_refine_cte_cl_concurrency(bool concurrent);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	980
1709 5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	981 RefToScanQueue *task_queue(int i) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	982
616 4f360ec815ba 6720309: G1: don't synchronously update RSet during evacuation pauses iveresov parents: 545 diff changeset	983 // A set of cards where updates happened during the GC
4f360ec815ba 6720309: G1: don't synchronously update RSet during evacuation pauses iveresov parents: 545 diff changeset	984 DirtyCardQueueSet& dirty_card_queue_set() { return _dirty_card_queue_set; }
4f360ec815ba 6720309: G1: don't synchronously update RSet during evacuation pauses iveresov parents: 545 diff changeset	985
1705 2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	986 // A DirtyCardQueueSet that is used to hold cards that contain
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	987 // references into the current collection set. This is used to
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	988 // update the remembered sets of the regions in the collection
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	989 // set in the event of an evacuation failure.
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	990 DirtyCardQueueSet& into_cset_dirty_card_queue_set()
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	991 { return _into_cset_dirty_card_queue_set; }
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	992
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	993 // Create a G1CollectedHeap with the specified policy.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	994 // Must call the initialize method afterwards.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	995 // May not return if something goes wrong.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	996 G1CollectedHeap(G1CollectorPolicy* policy);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	997
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	998 // Initialize the G1CollectedHeap to have the initial and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	999 // maximum sizes, permanent generation, and remembered and barrier sets
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1000 // specified by the policy object.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1001 jint initialize();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1002
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1003 // Initialize weak reference processing.
2037 b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 2030 diff changeset	1004 virtual void ref_processing_init();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1005
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4709 diff changeset	1006 void set_par_threads(uint t) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1007 SharedHeap::set_par_threads(t);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1008 // Done in SharedHeap but oddly there are
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1009 // two _process_strong_tasks's in a G1CollectedHeap
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1010 // so do it here too.
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1011 _process_strong_tasks->set_n_threads(t);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1012 }
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1013
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1014 // Set _n_par_threads according to a policy TBD.
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1015 void set_par_threads();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1016
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1017 void set_n_termination(int t) {
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1718 diff changeset	1018 _process_strong_tasks->set_n_threads(t);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1019 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1020
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1021 virtual CollectedHeap::Name kind() const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1022 return CollectedHeap::G1CollectedHeap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1023 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1024
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1025 // The current policy object for the collector.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1026 G1CollectorPolicy* g1_policy() const { return _g1_policy; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1027
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1028 // Adaptive size policy. No such thing for g1.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1029 virtual AdaptiveSizePolicy* size_policy() { return NULL; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1030
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1031 // The rem set and barrier set.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1032 G1RemSet* g1_rem_set() const { return _g1_rem_set; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1033 ModRefBarrierSet* mr_bs() const { return _mr_bs; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1034
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1035 // The rem set iterator.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1036 HeapRegionRemSetIterator* rem_set_iterator(int i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1037 return _rem_set_iterator[i];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1038 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1039
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1040 HeapRegionRemSetIterator* rem_set_iterator() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1041 return _rem_set_iterator[0];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1042 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1043
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1044 unsigned get_gc_time_stamp() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1045 return _gc_time_stamp;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1046 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1047
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1048 void reset_gc_time_stamp() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1049 _gc_time_stamp = 0;
353 9bb2c10ac07b 6723570: G1: assertion failure: p == current_top or oop(p)->is_oop(),"p is not a block start" (revisited!) iveresov parents: 342 diff changeset	1050 OrderAccess::fence();
4709 fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1051 // Clear the cached CSet starting regions and time stamps.
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1052 // Their validity is dependent on the GC timestamp.
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1053 clear_cset_start_regions();
353 9bb2c10ac07b 6723570: G1: assertion failure: p == current_top or oop(p)->is_oop(),"p is not a block start" (revisited!) iveresov parents: 342 diff changeset	1054 }
9bb2c10ac07b 6723570: G1: assertion failure: p == current_top or oop(p)->is_oop(),"p is not a block start" (revisited!) iveresov parents: 342 diff changeset	1055
9bb2c10ac07b 6723570: G1: assertion failure: p == current_top or oop(p)->is_oop(),"p is not a block start" (revisited!) iveresov parents: 342 diff changeset	1056 void increment_gc_time_stamp() {
9bb2c10ac07b 6723570: G1: assertion failure: p == current_top or oop(p)->is_oop(),"p is not a block start" (revisited!) iveresov parents: 342 diff changeset	1057 ++_gc_time_stamp;
9bb2c10ac07b 6723570: G1: assertion failure: p == current_top or oop(p)->is_oop(),"p is not a block start" (revisited!) iveresov parents: 342 diff changeset	1058 OrderAccess::fence();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1059 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1060
1705 2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	1061 void iterate_dirty_card_closure(CardTableEntryClosure* cl,
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	1062 DirtyCardQueue* into_cset_dcq,
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	1063 bool concurrent, int worker_i);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1064
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1065 // The shared block offset table array.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1066 G1BlockOffsetSharedArray* bot_shared() const { return _bot_shared; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1067
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1068 // Reference Processing accessors
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1069
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1070 // The STW reference processor....
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1071 ReferenceProcessor* ref_processor_stw() const { return _ref_processor_stw; }
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1072
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1073 // The Concurent Marking reference processor...
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1074 ReferenceProcessor* ref_processor_cm() const { return _ref_processor_cm; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1075
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1076 virtual size_t capacity() const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1077 virtual size_t used() const;
846 42d84bbbecf4 6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf") tonyp parents: 845 diff changeset	1078 // This should be called when we're not holding the heap lock. The
42d84bbbecf4 6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf") tonyp parents: 845 diff changeset	1079 // result might be a bit inaccurate.
42d84bbbecf4 6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf") tonyp parents: 845 diff changeset	1080 size_t used_unlocked() const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1081 size_t recalculate_used() const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1082
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1083 // These virtual functions do the actual allocation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1084 // Some heaps may offer a contiguous region for shared non-blocking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1085 // allocation, via inlined code (by exporting the address of the top and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1086 // end fields defining the extent of the contiguous allocation region.)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1087 // But G1CollectedHeap doesn't yet support this.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1088
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1089 // Return an estimate of the maximum allocation that could be performed
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1090 // without triggering any collection or expansion activity. In a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1091 // generational collector, for example, this is probably the largest
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1092 // allocation that could be supported (without expansion) in the youngest
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1093 // generation. It is "unsafe" because no locks are taken; the result
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1094 // should be treated as an approximation, not a guarantee, for use in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1095 // heuristic resizing decisions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1096 virtual size_t unsafe_max_alloc();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1097
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1098 virtual bool is_maximal_no_gc() const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1099 return _g1_storage.uncommitted_size() == 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1100 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1101
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1102 // The total number of regions in the heap.
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1103 size_t n_regions() { return _hrs.length(); }
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1104
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1105 // The max number of regions in the heap.
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1106 size_t max_regions() { return _hrs.max_length(); }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1107
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1108 // The number of regions that are completely free.
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1109 size_t free_regions() { return _free_list.length(); }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1110
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1111 // The number of regions that are not completely free.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1112 size_t used_regions() { return n_regions() - free_regions(); }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1113
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1114 // The number of regions available for "regular" expansion.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1115 size_t expansion_regions() { return _expansion_regions; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1116
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1117 // Factory method for HeapRegion instances. It will return NULL if
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1118 // the allocation fails.
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1119 HeapRegion* new_heap_region(size_t hrs_index, HeapWord* bottom);
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1120
3317 063382f9b575 7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...) tonyp parents: 3289 diff changeset	1121 void verify_not_dirty_region(HeapRegion* hr) PRODUCT_RETURN;
063382f9b575 7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...) tonyp parents: 3289 diff changeset	1122 void verify_dirty_region(HeapRegion* hr) PRODUCT_RETURN;
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	1123 void verify_dirty_young_list(HeapRegion* head) PRODUCT_RETURN;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	1124 void verify_dirty_young_regions() PRODUCT_RETURN;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	1125
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1126 // verify_region_sets() performs verification over the region
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1127 // lists. It will be compiled in the product code to be used when
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1128 // necessary (i.e., during heap verification).
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1129 void verify_region_sets();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1130
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1131 // verify_region_sets_optional() is planted in the code for
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1132 // list verification in non-product builds (and it can be enabled in
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1133 // product builds by definning HEAP_REGION_SET_FORCE_VERIFY to be 1).
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1134 #if HEAP_REGION_SET_FORCE_VERIFY
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1135 void verify_region_sets_optional() {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1136 verify_region_sets();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1137 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1138 #else // HEAP_REGION_SET_FORCE_VERIFY
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1139 void verify_region_sets_optional() { }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1140 #endif // HEAP_REGION_SET_FORCE_VERIFY
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1141
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1142 #ifdef ASSERT
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	1143 bool is_on_master_free_list(HeapRegion* hr) {
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1144 return hr->containing_set() == &_free_list;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1145 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1146
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	1147 bool is_in_humongous_set(HeapRegion* hr) {
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1148 return hr->containing_set() == &_humongous_set;
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	1149 }
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1150 #endif // ASSERT
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1151
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1152 // Wrapper for the region list operations that can be called from
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1153 // methods outside this class.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1154
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1155 void secondary_free_list_add_as_tail(FreeRegionList* list) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1156 _secondary_free_list.add_as_tail(list);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1157 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1158
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1159 void append_secondary_free_list() {
2432 455328d90876 7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end tonyp parents: 2361 diff changeset	1160 _free_list.add_as_head(&_secondary_free_list);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1161 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1162
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	1163 void append_secondary_free_list_if_not_empty_with_lock() {
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	1164 // If the secondary free list looks empty there's no reason to
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	1165 // take the lock and then try to append it.
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1166 if (!_secondary_free_list.is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1167 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1168 append_secondary_free_list();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1169 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1170 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1171
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	1172 void old_set_remove(HeapRegion* hr) {
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	1173 _old_set.remove(hr);
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	1174 }
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	1175
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1176 size_t non_young_capacity_bytes() {
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1177 return _old_set.total_capacity_bytes() + _humongous_set.total_capacity_bytes();
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1178 }
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1179
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1180 void set_free_regions_coming();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1181 void reset_free_regions_coming();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1182 bool free_regions_coming() { return _free_regions_coming; }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1183 void wait_while_free_regions_coming();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1184
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1185 // Perform a collection of the heap; intended for use in implementing
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1186 // "System.gc". This probably implies as full a collection as the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1187 // "CollectedHeap" supports.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1188 virtual void collect(GCCause::Cause cause);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1189
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1190 // The same as above but assume that the caller holds the Heap_lock.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1191 void collect_locked(GCCause::Cause cause);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1192
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1193 // This interface assumes that it's being called by the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1194 // vm thread. It collects the heap assuming that the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1195 // heap lock is already held and that we are executing in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1196 // the context of the vm thread.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1197 virtual void collect_as_vm_thread(GCCause::Cause cause);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1198
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1199 // True iff a evacuation has failed in the most-recent collection.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1200 bool evacuation_failed() { return _evacuation_failed; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1201
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1202 // It will free a region if it has allocated objects in it that are
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1203 // all dead. It calls either free_region() or
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1204 // free_humongous_region() depending on the type of the region that
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1205 // is passed to it.
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1206 void free_region_if_empty(HeapRegion* hr,
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1207 size_t* pre_used,
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1208 FreeRegionList* free_list,
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	1209 OldRegionSet* old_proxy_set,
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1210 HumongousRegionSet* humongous_proxy_set,
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1211 HRRSCleanupTask* hrrs_cleanup_task,
97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	1212 bool par);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1213
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1214 // It appends the free list to the master free list and updates the
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1215 // master humongous list according to the contents of the proxy
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1216 // list. It also adjusts the total used bytes according to pre_used
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1217 // (if par is true, it will do so by taking the ParGCRareEvent_lock).
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1218 void update_sets_after_freeing_regions(size_t pre_used,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1219 FreeRegionList* free_list,
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	1220 OldRegionSet* old_proxy_set,
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1221 HumongousRegionSet* humongous_proxy_set,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1222 bool par);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1223
4708 3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4097 diff changeset	1224 // Returns "TRUE" iff "p" points into the committed areas of the heap.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1225 virtual bool is_in(const void* p) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1226
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1227 // Return "TRUE" iff the given object address is within the collection
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1228 // set.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1229 inline bool obj_in_cs(oop obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1230
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1231 // Return "TRUE" iff the given object address is in the reserved
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1232 // region of g1 (excluding the permanent generation).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1233 bool is_in_g1_reserved(const void* p) const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1234 return _g1_reserved.contains(p);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1235 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1236
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2433 diff changeset	1237 // Returns a MemRegion that corresponds to the space that has been
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2433 diff changeset	1238 // reserved for the heap
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2433 diff changeset	1239 MemRegion g1_reserved() {
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2433 diff changeset	1240 return _g1_reserved;
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2433 diff changeset	1241 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2433 diff changeset	1242
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2433 diff changeset	1243 // Returns a MemRegion that corresponds to the space that has been
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1244 // committed in the heap
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1245 MemRegion g1_committed() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1246 return _g1_committed;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1247 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1248
2311 4e0069ff33df 7022200: G1: optimized build broken johnc parents: 2188 diff changeset	1249 virtual bool is_in_closed_subset(const void* p) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1250
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1251 // This resets the card table to all zeros. It is used after
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1252 // a collection pause which used the card table to claim cards.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1253 void cleanUpCardTable();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1254
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1255 // Iteration functions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1256
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1257 // Iterate over all the ref-containing fields of all objects, calling
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1258 // "cl.do_oop" on each.
678 4ac7d97e6101 6822263: G1: JVMTI heap iteration fails iveresov parents: 677 diff changeset	1259 virtual void oop_iterate(OopClosure* cl) {
4ac7d97e6101 6822263: G1: JVMTI heap iteration fails iveresov parents: 677 diff changeset	1260 oop_iterate(cl, true);
4ac7d97e6101 6822263: G1: JVMTI heap iteration fails iveresov parents: 677 diff changeset	1261 }
4ac7d97e6101 6822263: G1: JVMTI heap iteration fails iveresov parents: 677 diff changeset	1262 void oop_iterate(OopClosure* cl, bool do_perm);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1263
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1264 // Same as above, restricted to a memory region.
678 4ac7d97e6101 6822263: G1: JVMTI heap iteration fails iveresov parents: 677 diff changeset	1265 virtual void oop_iterate(MemRegion mr, OopClosure* cl) {
4ac7d97e6101 6822263: G1: JVMTI heap iteration fails iveresov parents: 677 diff changeset	1266 oop_iterate(mr, cl, true);
4ac7d97e6101 6822263: G1: JVMTI heap iteration fails iveresov parents: 677 diff changeset	1267 }
4ac7d97e6101 6822263: G1: JVMTI heap iteration fails iveresov parents: 677 diff changeset	1268 void oop_iterate(MemRegion mr, OopClosure* cl, bool do_perm);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1269
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1270 // Iterate over all objects, calling "cl.do_object" on each.
678 4ac7d97e6101 6822263: G1: JVMTI heap iteration fails iveresov parents: 677 diff changeset	1271 virtual void object_iterate(ObjectClosure* cl) {
4ac7d97e6101 6822263: G1: JVMTI heap iteration fails iveresov parents: 677 diff changeset	1272 object_iterate(cl, true);
4ac7d97e6101 6822263: G1: JVMTI heap iteration fails iveresov parents: 677 diff changeset	1273 }
4ac7d97e6101 6822263: G1: JVMTI heap iteration fails iveresov parents: 677 diff changeset	1274 virtual void safe_object_iterate(ObjectClosure* cl) {
4ac7d97e6101 6822263: G1: JVMTI heap iteration fails iveresov parents: 677 diff changeset	1275 object_iterate(cl, true);
4ac7d97e6101 6822263: G1: JVMTI heap iteration fails iveresov parents: 677 diff changeset	1276 }
4ac7d97e6101 6822263: G1: JVMTI heap iteration fails iveresov parents: 677 diff changeset	1277 void object_iterate(ObjectClosure* cl, bool do_perm);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1278
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1279 // Iterate over all objects allocated since the last collection, calling
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1280 // "cl.do_object" on each. The heap must have been initialized properly
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1281 // to support this function, or else this call will fail.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1282 virtual void object_iterate_since_last_GC(ObjectClosure* cl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1283
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1284 // Iterate over all spaces in use in the heap, in ascending address order.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1285 virtual void space_iterate(SpaceClosure* cl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1286
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1287 // Iterate over heap regions, in address order, terminating the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1288 // iteration early if the "doHeapRegion" method returns "true".
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1289 void heap_region_iterate(HeapRegionClosure* blk) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1290
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1291 // Iterate over heap regions starting with r (or the first region if "r"
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1292 // is NULL), in address order, terminating early if the "doHeapRegion"
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1293 // method returns "true".
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1294 void heap_region_iterate_from(HeapRegion* r, HeapRegionClosure* blk) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1295
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1296 // Return the region with the given index. It assumes the index is valid.
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1297 HeapRegion* region_at(size_t index) const { return _hrs.at(index); }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1298
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1299 // Divide the heap region sequence into "chunks" of some size (the number
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1300 // of regions divided by the number of parallel threads times some
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1301 // overpartition factor, currently 4). Assumes that this will be called
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1302 // in parallel by ParallelGCThreads worker threads with discinct worker
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1303 // ids in the range [0..max(ParallelGCThreads-1, 1)], that all parallel
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1304 // calls will use the same "claim_value", and that that claim value is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1305 // different from the claim_value of any heap region before the start of
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1306 // the iteration. Applies "blk->doHeapRegion" to each of the regions, by
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1307 // attempting to claim the first region in each chunk, and, if
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1308 // successful, applying the closure to each region in the chunk (and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1309 // setting the claim value of the second and subsequent regions of the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1310 // chunk.) For now requires that "doHeapRegion" always returns "false",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1311 // i.e., that a closure never attempt to abort a traversal.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1312 void heap_region_par_iterate_chunked(HeapRegionClosure* blk,
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4709 diff changeset	1313 uint worker,
441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4709 diff changeset	1314 uint no_of_par_workers,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1315 jint claim_value);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1316
390 cc68c8e9b309 6752248: G1: introduce parallel heap verification tonyp parents: 355 diff changeset	1317 // It resets all the region claim values to the default.
cc68c8e9b309 6752248: G1: introduce parallel heap verification tonyp parents: 355 diff changeset	1318 void reset_heap_region_claim_values();
cc68c8e9b309 6752248: G1: introduce parallel heap verification tonyp parents: 355 diff changeset	1319
4783 023652e49ac0 7121496: G1: do the per-region evacuation failure handling work in parallel johnc parents: 4781 diff changeset	1320 // Resets the claim values of regions in the current
023652e49ac0 7121496: G1: do the per-region evacuation failure handling work in parallel johnc parents: 4781 diff changeset	1321 // collection set to the default.
023652e49ac0 7121496: G1: do the per-region evacuation failure handling work in parallel johnc parents: 4781 diff changeset	1322 void reset_cset_heap_region_claim_values();
023652e49ac0 7121496: G1: do the per-region evacuation failure handling work in parallel johnc parents: 4781 diff changeset	1323
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 353 diff changeset	1324 #ifdef ASSERT
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 353 diff changeset	1325 bool check_heap_region_claim_values(jint claim_value);
4097 dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4095 diff changeset	1326
dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4095 diff changeset	1327 // Same as the routine above but only checks regions in the
dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4095 diff changeset	1328 // current collection set.
dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4095 diff changeset	1329 bool check_cset_heap_region_claim_values(jint claim_value);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 353 diff changeset	1330 #endif // ASSERT
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 353 diff changeset	1331
4709 fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1332 // Clear the cached cset start regions and (more importantly)
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1333 // the time stamps. Called when we reset the GC time stamp.
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1334 void clear_cset_start_regions();
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1335
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1336 // Given the id of a worker, obtain or calculate a suitable
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1337 // starting region for iterating over the current collection set.
4097 dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4095 diff changeset	1338 HeapRegion* start_cset_region_for_worker(int worker_i);
dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4095 diff changeset	1339
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1340 // Iterate over the regions (if any) in the current collection set.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1341 void collection_set_iterate(HeapRegionClosure* blk);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1343 // As above but starting from region r
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1344 void collection_set_iterate_from(HeapRegion* r, HeapRegionClosure *blk);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1345
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1346 // Returns the first (lowest address) compactible space in the heap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1347 virtual CompactibleSpace* first_compactible_space();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1348
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1349 // A CollectedHeap will contain some number of spaces. This finds the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1350 // space containing a given address, or else returns NULL.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1351 virtual Space* space_containing(const void* addr) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1352
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1353 // A G1CollectedHeap will contain some number of heap regions. This
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1354 // finds the region containing a given address, or else returns NULL.
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1355 template <class T>
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1356 inline HeapRegion* heap_region_containing(const T addr) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1357
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1358 // Like the above, but requires "addr" to be in the heap (to avoid a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1359 // null-check), and unlike the above, may return an continuing humongous
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1360 // region.
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1361 template <class T>
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1362 inline HeapRegion* heap_region_containing_raw(const T addr) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1363
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1364 // A CollectedHeap is divided into a dense sequence of "blocks"; that is,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1365 // each address in the (reserved) heap is a member of exactly
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1366 // one block. The defining characteristic of a block is that it is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1367 // possible to find its size, and thus to progress forward to the next
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1368 // block. (Blocks may be of different sizes.) Thus, blocks may
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1369 // represent Java objects, or they might be free blocks in a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1370 // free-list-based heap (or subheap), as long as the two kinds are
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1371 // distinguishable and the size of each is determinable.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1372
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1373 // Returns the address of the start of the "block" that contains the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1374 // address "addr". We say "blocks" instead of "object" since some heaps
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1375 // may not pack objects densely; a chunk may either be an object or a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1376 // non-object.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1377 virtual HeapWord* block_start(const void* addr) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1378
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1379 // Requires "addr" to be the start of a chunk, and returns its size.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1380 // "addr + size" is required to be the start of a new chunk, or the end
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1381 // of the active area of the heap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1382 virtual size_t block_size(const HeapWord* addr) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1383
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1384 // Requires "addr" to be the start of a block, and returns "TRUE" iff
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1385 // the block is an object.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1386 virtual bool block_is_obj(const HeapWord* addr) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1387
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1388 // Does this heap support heap inspection? (+PrintClassHistogram)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1389 virtual bool supports_heap_inspection() const { return true; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1390
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1391 // Section on thread-local allocation buffers (TLABs)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1392 // See CollectedHeap for semantics.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1393
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1394 virtual bool supports_tlab_allocation() const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1395 virtual size_t tlab_capacity(Thread* thr) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1396 virtual size_t unsafe_max_tlab_alloc(Thread* thr) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1397
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1398 // Can a compiler initialize a new object without store barriers?
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1399 // This permission only extends from the creation of a new object
1027 39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1400 // via a TLAB up to the first subsequent safepoint. If such permission
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1401 // is granted for this heap type, the compiler promises to call
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1402 // defer_store_barrier() below on any slow path allocation of
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1403 // a new object for which such initializing store barriers will
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1404 // have been elided. G1, like CMS, allows this, but should be
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1405 // ready to provide a compensating write barrier as necessary
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1406 // if that storage came out of a non-young region. The efficiency
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1407 // of this implementation depends crucially on being able to
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1408 // answer very efficiently in constant time whether a piece of
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1409 // storage in the heap comes from a young region or not.
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1410 // See ReduceInitialCardMarks.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1411 virtual bool can_elide_tlab_store_barriers() const {
3988 246daf2c601d 7005808: G1: re-enable ReduceInitialCardMarks for G1 brutisso parents: 3980 diff changeset	1412 return true;
1027 39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1413 }
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1414
1166 7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1092 diff changeset	1415 virtual bool card_mark_must_follow_store() const {
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1092 diff changeset	1416 return true;
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1092 diff changeset	1417 }
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1092 diff changeset	1418
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1419 bool is_in_young(const oop obj) {
1027 39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1420 HeapRegion* hr = heap_region_containing(obj);
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1421 return hr != NULL && hr->is_young();
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1422 }
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1423
3377 2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 3317 diff changeset	1424 #ifdef ASSERT
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 3317 diff changeset	1425 virtual bool is_in_partial_collection(const void* p);
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 3317 diff changeset	1426 #endif
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 3317 diff changeset	1427
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 3317 diff changeset	1428 virtual bool is_scavengable(const void* addr);
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 3317 diff changeset	1429
1027 39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1430 // We don't need barriers for initializing stores to objects
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1431 // in the young gen: for the SATB pre-barrier, there is no
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1432 // pre-value that needs to be remembered; for the remembered-set
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1433 // update logging post-barrier, we don't maintain remembered set
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1434 // information for young gen objects.
1027 39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1435 virtual bool can_elide_initializing_store_barrier(oop new_obj) {
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1436 return is_in_young(new_obj);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1437 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1438
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1439 // Can a compiler elide a store barrier when it writes
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1440 // a permanent oop into the heap? Applies when the compiler
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1441 // is storing x to the heap, where x->is_perm() is true.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1442 virtual bool can_elide_permanent_oop_store_barriers() const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1443 // At least until perm gen collection is also G1-ified, at
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1444 // which point this should return false.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1445 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1446 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1447
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1448 // Returns "true" iff the given word_size is "very large".
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1449 static bool isHumongous(size_t word_size) {
1313 664ae0c5e0e5 6755988: G1: assert(new_obj != 0 \|\| ... "should be forwarded") johnc parents: 1311 diff changeset	1450 // Note this has to be strictly greater-than as the TLABs
664ae0c5e0e5 6755988: G1: assert(new_obj != 0 \|\| ... "should be forwarded") johnc parents: 1311 diff changeset	1451 // are capped at the humongous thresold and we want to
664ae0c5e0e5 6755988: G1: assert(new_obj != 0 \|\| ... "should be forwarded") johnc parents: 1311 diff changeset	1452 // ensure that we don't try to allocate a TLAB as
664ae0c5e0e5 6755988: G1: assert(new_obj != 0 \|\| ... "should be forwarded") johnc parents: 1311 diff changeset	1453 // humongous and that we don't allocate a humongous
664ae0c5e0e5 6755988: G1: assert(new_obj != 0 \|\| ... "should be forwarded") johnc parents: 1311 diff changeset	1454 // object in a TLAB.
664ae0c5e0e5 6755988: G1: assert(new_obj != 0 \|\| ... "should be forwarded") johnc parents: 1311 diff changeset	1455 return word_size > _humongous_object_threshold_in_words;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1456 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1457
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1458 // Update mod union table with the set of dirty cards.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1459 void updateModUnion();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1460
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1461 // Set the mod union bits corresponding to the given memRegion. Note
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1462 // that this is always a safe operation, since it doesn't clear any
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1463 // bits.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1464 void markModUnionRange(MemRegion mr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1465
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1466 // Records the fact that a marking phase is no longer in progress.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1467 void set_marking_complete() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1468 _mark_in_progress = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1469 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1470 void set_marking_started() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1471 _mark_in_progress = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1472 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1473 bool mark_in_progress() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1474 return _mark_in_progress;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1475 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1476
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1477 // Print the maximum heap capacity.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1478 virtual size_t max_capacity() const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1479
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1480 virtual jlong millis_since_last_gc();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1481
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1482 // Perform any cleanup actions necessary before allowing a verification.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1483 virtual void prepare_for_verify();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1484
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1485 // Perform verification.
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 807 diff changeset	1486
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1487 // vo == UsePrevMarking -> use "prev" marking information,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1488 // vo == UseNextMarking -> use "next" marking information
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1489 // vo == UseMarkWord -> use the mark word in the object header
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1490 //
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 807 diff changeset	1491 // NOTE: Only the "prev" marking information is guaranteed to be
830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 807 diff changeset	1492 // consistent most of the time, so most calls to this should use
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1493 // vo == UsePrevMarking.
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1494 // Currently, there is only one case where this is called with
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1495 // vo == UseNextMarking, which is to verify the "next" marking
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1496 // information at the end of remark.
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1497 // Currently there is only one place where this is called with
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1498 // vo == UseMarkWord, which is to verify the marking during a
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1499 // full GC.
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1500 void verify(bool allow_dirty, bool silent, VerifyOption vo);
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 807 diff changeset	1501
830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 807 diff changeset	1502 // Override; it uses the "prev" marking information
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1503 virtual void verify(bool allow_dirty, bool silent);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1504 virtual void print_on(outputStream* st) const;
4073 53074c2c4600 7099849: G1: include heap region information in hs_err files tonyp parents: 4072 diff changeset	1505 virtual void print_extended_on(outputStream* st) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1506
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1507 virtual void print_gc_threads_on(outputStream* st) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1508 virtual void gc_threads_do(ThreadClosure* tc) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1509
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1510 // Override
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1511 void print_tracing_info() const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1512
3777 e8b0b0392037 7046182: G1: remove unnecessary iterations over the collection set tonyp parents: 3774 diff changeset	1513 // The following two methods are helpful for debugging RSet issues.
e8b0b0392037 7046182: G1: remove unnecessary iterations over the collection set tonyp parents: 3774 diff changeset	1514 void print_cset_rsets() PRODUCT_RETURN;
e8b0b0392037 7046182: G1: remove unnecessary iterations over the collection set tonyp parents: 3774 diff changeset	1515 void print_all_rsets() PRODUCT_RETURN;
e8b0b0392037 7046182: G1: remove unnecessary iterations over the collection set tonyp parents: 3774 diff changeset	1516
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1517 // Convenience function to be used in situations where the heap type can be
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1518 // asserted to be this type.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1519 static G1CollectedHeap* heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1520
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1521 void set_region_short_lived_locked(HeapRegion* hr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1522 // add appropriate methods for any other surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1523
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1524 YoungList* young_list() { return _young_list; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1525
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1526 // debugging
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1527 bool check_young_list_well_formed() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1528 return _young_list->check_list_well_formed();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1529 }
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1530
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1531 bool check_young_list_empty(bool check_heap,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1532 bool check_sample = true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1533
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1534 // *** Stuff related to concurrent marking. It's not clear to me that so
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1535 // many of these need to be public.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1536
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1537 // The functions below are helper functions that a subclass of
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1538 // "CollectedHeap" can use in the implementation of its virtual
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1539 // functions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1540 // This performs a concurrent marking of the live objects in a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1541 // bitmap off to the side.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1542 void doConcurrentMark();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1543
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1544 bool isMarkedPrev(oop obj) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1545 bool isMarkedNext(oop obj) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1546
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1547 // vo == UsePrevMarking -> use "prev" marking information,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1548 // vo == UseNextMarking -> use "next" marking information,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1549 // vo == UseMarkWord -> use mark word from object header
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 807 diff changeset	1550 bool is_obj_dead_cond(const oop obj,
830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 807 diff changeset	1551 const HeapRegion* hr,
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1552 const VerifyOption vo) const {
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1553
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1554 switch (vo) {
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1555 case VerifyOption_G1UsePrevMarking:
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1556 return is_obj_dead(obj, hr);
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1557 case VerifyOption_G1UseNextMarking:
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1558 return is_obj_ill(obj, hr);
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1559 default:
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1560 assert(vo == VerifyOption_G1UseMarkWord, "must be");
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1561 return !obj->is_gc_marked();
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 807 diff changeset	1562 }
830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 807 diff changeset	1563 }
830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 807 diff changeset	1564
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1565 // Determine if an object is dead, given the object and also
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1566 // the region to which the object belongs. An object is dead
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1567 // iff a) it was not allocated since the last mark and b) it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1568 // is not marked.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1569
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1570 bool is_obj_dead(const oop obj, const HeapRegion* hr) const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1571 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1572 !hr->obj_allocated_since_prev_marking(obj) &&
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1573 !isMarkedPrev(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1574 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1575
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1576 // This is used when copying an object to survivor space.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1577 // If the object is marked live, then we mark the copy live.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1578 // If the object is allocated since the start of this mark
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1579 // cycle, then we mark the copy live.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1580 // If the object has been around since the previous mark
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1581 // phase, and hasn't been marked yet during this phase,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1582 // then we don't mark it, we just wait for the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1583 // current marking cycle to get to it.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1584
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1585 // This function returns true when an object has been
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1586 // around since the previous marking and hasn't yet
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1587 // been marked during this marking.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1588
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1589 bool is_obj_ill(const oop obj, const HeapRegion* hr) const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1590 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1591 !hr->obj_allocated_since_next_marking(obj) &&
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1592 !isMarkedNext(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1593 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1594
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1595 // Determine if an object is dead, given only the object itself.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1596 // This will find the region to which the object belongs and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1597 // then call the region version of the same function.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1598
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1599 // Added if it is in permanent gen it isn't dead.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1600 // Added if it is NULL it isn't dead.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1601
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1602 // vo == UsePrevMarking -> use "prev" marking information,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1603 // vo == UseNextMarking -> use "next" marking information,
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1604 // vo == UseMarkWord -> use mark word from object header
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 807 diff changeset	1605 bool is_obj_dead_cond(const oop obj,
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1606 const VerifyOption vo) const {
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1607
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1608 switch (vo) {
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1609 case VerifyOption_G1UsePrevMarking:
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1610 return is_obj_dead(obj);
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1611 case VerifyOption_G1UseNextMarking:
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1612 return is_obj_ill(obj);
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1613 default:
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1614 assert(vo == VerifyOption_G1UseMarkWord, "must be");
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1615 return !obj->is_gc_marked();
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 807 diff changeset	1616 }
830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 807 diff changeset	1617 }
830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 807 diff changeset	1618
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1619 bool is_obj_dead(const oop obj) const {
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 807 diff changeset	1620 const HeapRegion* hr = heap_region_containing(obj);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1621 if (hr == NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1622 if (Universe::heap()->is_in_permanent(obj))
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1623 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1624 else if (obj == NULL) return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1625 else return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1626 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1627 else return is_obj_dead(obj, hr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1628 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1629
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 3766 diff changeset	1630 bool is_obj_ill(const oop obj) const {
811 830ca2573896 6850846: G1: extend G1 marking verification tonyp parents: 807 diff changeset	1631 const HeapRegion* hr = heap_region_containing(obj);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1632 if (hr == NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1633 if (Universe::heap()->is_in_permanent(obj))
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1634 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1635 else if (obj == NULL) return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1636 else return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1637 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1638 else return is_obj_ill(obj, hr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1639 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1640
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1641 // The following is just to alert the verification code
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1642 // that a full collection has occurred and that the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1643 // remembered sets are no longer up to date.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1644 bool _full_collection;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1645 void set_full_collection() { _full_collection = true;}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1646 void clear_full_collection() {_full_collection = false;}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1647 bool full_collection() {return _full_collection;}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1648
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1649 ConcurrentMark* concurrent_mark() const { return _cm; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1650 ConcurrentG1Refine* concurrent_g1_refine() const { return _cg1r; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1651
796 29e7d79232b9 6819065: G1: eliminate high serial card table clearing time apetrusenko parents: 678 diff changeset	1652 // The dirty cards region list is used to record a subset of regions
29e7d79232b9 6819065: G1: eliminate high serial card table clearing time apetrusenko parents: 678 diff changeset	1653 // whose cards need clearing. The list if populated during the
29e7d79232b9 6819065: G1: eliminate high serial card table clearing time apetrusenko parents: 678 diff changeset	1654 // remembered set scanning and drained during the card table
29e7d79232b9 6819065: G1: eliminate high serial card table clearing time apetrusenko parents: 678 diff changeset	1655 // cleanup. Although the methods are reentrant, population/draining
29e7d79232b9 6819065: G1: eliminate high serial card table clearing time apetrusenko parents: 678 diff changeset	1656 // phases must not overlap. For synchronization purposes the last
29e7d79232b9 6819065: G1: eliminate high serial card table clearing time apetrusenko parents: 678 diff changeset	1657 // element on the list points to itself.
29e7d79232b9 6819065: G1: eliminate high serial card table clearing time apetrusenko parents: 678 diff changeset	1658 HeapRegion* _dirty_cards_region_list;
29e7d79232b9 6819065: G1: eliminate high serial card table clearing time apetrusenko parents: 678 diff changeset	1659 void push_dirty_cards_region(HeapRegion* hr);
29e7d79232b9 6819065: G1: eliminate high serial card table clearing time apetrusenko parents: 678 diff changeset	1660 HeapRegion* pop_dirty_cards_region();
29e7d79232b9 6819065: G1: eliminate high serial card table clearing time apetrusenko parents: 678 diff changeset	1661
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1662 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1663 void stop_conc_gc_threads();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1664
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1665 double predict_region_elapsed_time_ms(HeapRegion* hr, bool young);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1666 void check_if_region_is_too_expensive(double predicted_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1667 size_t pending_card_num();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1668 size_t max_pending_card_num();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1669 size_t cards_scanned();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1670
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1671 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1672 size_t _max_heap_capacity;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1673 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1674
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1675 #define use_local_bitmaps 1
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1676 #define verify_local_bitmaps 0
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1677 #define oop_buffer_length 256
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1678
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1679 #ifndef PRODUCT
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1680 class GCLabBitMap;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1681 class GCLabBitMapClosure: public BitMapClosure {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1682 private:
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1683 ConcurrentMark* _cm;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1684 GCLabBitMap* _bitmap;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1685
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1686 public:
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1687 GCLabBitMapClosure(ConcurrentMark* cm,
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1688 GCLabBitMap* bitmap) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1689 _cm = cm;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1690 _bitmap = bitmap;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1691 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1692
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1693 virtual bool do_bit(size_t offset);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1694 };
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1695 #endif // !PRODUCT
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1696
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1697 class GCLabBitMap: public BitMap {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1698 private:
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1699 ConcurrentMark* _cm;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1700
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1701 int _shifter;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1702 size_t _bitmap_word_covers_words;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1703
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1704 // beginning of the heap
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1705 HeapWord* _heap_start;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1706
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1707 // this is the actual start of the GCLab
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1708 HeapWord* _real_start_word;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1709
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1710 // this is the actual end of the GCLab
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1711 HeapWord* _real_end_word;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1712
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1713 // this is the first word, possibly located before the actual start
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1714 // of the GCLab, that corresponds to the first bit of the bitmap
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1715 HeapWord* _start_word;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1716
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1717 // size of a GCLab in words
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1718 size_t _gclab_word_size;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1719
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1720 static int shifter() {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1721 return MinObjAlignment - 1;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1722 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1723
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1724 // how many heap words does a single bitmap word corresponds to?
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1725 static size_t bitmap_word_covers_words() {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1726 return BitsPerWord << shifter();
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1727 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1728
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1729 size_t gclab_word_size() const {
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1730 return _gclab_word_size;
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1731 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1732
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1733 // Calculates actual GCLab size in words
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1734 size_t gclab_real_word_size() const {
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1735 return bitmap_size_in_bits(pointer_delta(_real_end_word, _start_word))
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1736 / BitsPerWord;
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1737 }
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1738
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1739 static size_t bitmap_size_in_bits(size_t gclab_word_size) {
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1740 size_t bits_in_bitmap = gclab_word_size >> shifter();
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1741 // We are going to ensure that the beginning of a word in this
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1742 // bitmap also corresponds to the beginning of a word in the
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1743 // global marking bitmap. To handle the case where a GCLab
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1744 // starts from the middle of the bitmap, we need to add enough
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1745 // space (i.e. up to a bitmap word) to ensure that we have
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1746 // enough bits in the bitmap.
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1747 return bits_in_bitmap + BitsPerWord - 1;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1748 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1749 public:
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1750 GCLabBitMap(HeapWord* heap_start, size_t gclab_word_size)
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1751 : BitMap(bitmap_size_in_bits(gclab_word_size)),
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1752 _cm(G1CollectedHeap::heap()->concurrent_mark()),
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1753 _shifter(shifter()),
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1754 _bitmap_word_covers_words(bitmap_word_covers_words()),
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1755 _heap_start(heap_start),
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1756 _gclab_word_size(gclab_word_size),
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1757 _real_start_word(NULL),
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1758 _real_end_word(NULL),
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	1759 _start_word(NULL) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	1760 guarantee(false, "GCLabBitMap::GCLabBitmap(): don't call this any more");
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1761 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1762
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1763 inline unsigned heapWordToOffset(HeapWord* addr) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1764 unsigned offset = (unsigned) pointer_delta(addr, _start_word) >> _shifter;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1765 assert(offset < size(), "offset should be within bounds");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1766 return offset;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1767 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1768
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1769 inline HeapWord* offsetToHeapWord(size_t offset) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1770 HeapWord* addr = _start_word + (offset << _shifter);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1771 assert(_real_start_word <= addr && addr < _real_end_word, "invariant");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1772 return addr;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1773 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1774
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1775 bool fields_well_formed() {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1776 bool ret1 = (_real_start_word == NULL) &&
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1777 (_real_end_word == NULL) &&
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1778 (_start_word == NULL);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1779 if (ret1)
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1780 return true;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1781
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1782 bool ret2 = _real_start_word >= _start_word &&
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1783 _start_word < _real_end_word &&
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1784 (_real_start_word + _gclab_word_size) == _real_end_word &&
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1785 (_start_word + _gclab_word_size + _bitmap_word_covers_words)
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1786 > _real_end_word;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1787 return ret2;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1788 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1789
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1790 inline bool mark(HeapWord* addr) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1791 guarantee(use_local_bitmaps, "invariant");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1792 assert(fields_well_formed(), "invariant");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1793
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1794 if (addr >= _real_start_word && addr < _real_end_word) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1795 assert(!isMarked(addr), "should not have already been marked");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1796
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1797 // first mark it on the bitmap
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1798 at_put(heapWordToOffset(addr), true);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1799
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1800 return true;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1801 } else {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1802 return false;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1803 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1804 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1805
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1806 inline bool isMarked(HeapWord* addr) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1807 guarantee(use_local_bitmaps, "invariant");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1808 assert(fields_well_formed(), "invariant");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1809
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1810 return at(heapWordToOffset(addr));
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1811 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1812
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1813 void set_buffer(HeapWord* start) {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	1814 guarantee(false, "set_buffer(): don't call this any more");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	1815
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1816 guarantee(use_local_bitmaps, "invariant");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1817 clear();
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1818
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1819 assert(start != NULL, "invariant");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1820 _real_start_word = start;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1821 _real_end_word = start + _gclab_word_size;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1822
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1823 size_t diff =
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1824 pointer_delta(start, _heap_start) % _bitmap_word_covers_words;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1825 _start_word = start - diff;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1826
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1827 assert(fields_well_formed(), "invariant");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1828 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1829
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1830 #ifndef PRODUCT
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1831 void verify() {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1832 // verify that the marks have been propagated
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1833 GCLabBitMapClosure cl(_cm, this);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1834 iterate(&cl);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1835 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1836 #endif // PRODUCT
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1837
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1838 void retire() {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	1839 guarantee(false, "retire(): don't call this any more");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	1840
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1841 guarantee(use_local_bitmaps, "invariant");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1842 assert(fields_well_formed(), "invariant");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1843
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1844 if (_start_word != NULL) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1845 CMBitMap* mark_bitmap = _cm->nextMarkBitMap();
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1846
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1847 // this means that the bitmap was set up for the GCLab
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1848 assert(_real_start_word != NULL && _real_end_word != NULL, "invariant");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1849
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1850 mark_bitmap->mostly_disjoint_range_union(this,
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1851 0, // always start from the start of the bitmap
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1852 _start_word,
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1853 gclab_real_word_size());
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1854 _cm->grayRegionIfNecessary(MemRegion(_real_start_word, _real_end_word));
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1855
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1856 #ifndef PRODUCT
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1857 if (use_local_bitmaps && verify_local_bitmaps)
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1858 verify();
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1859 #endif // PRODUCT
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1860 } else {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1861 assert(_real_start_word == NULL && _real_end_word == NULL, "invariant");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1862 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1863 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1864
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1865 size_t bitmap_size_in_words() const {
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1866 return (bitmap_size_in_bits(gclab_word_size()) + BitsPerWord - 1) / BitsPerWord;
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1867 }
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1868
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1869 };
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1870
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1871 class G1ParGCAllocBuffer: public ParGCAllocBuffer {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1872 private:
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1873 bool _retired;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1874
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1875 public:
3886 eeae91c9baba 7080389: G1: refactor marking code in evacuation pause copy closures johnc parents: 3867 diff changeset	1876 G1ParGCAllocBuffer(size_t gclab_word_size);
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1877
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	1878 void set_buf(HeapWord* buf) {
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1879 ParGCAllocBuffer::set_buf(buf);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1880 _retired = false;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1881 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1882
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	1883 void retire(bool end_of_gc, bool retain) {
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1884 if (_retired)
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1885 return;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1886 ParGCAllocBuffer::retire(end_of_gc, retain);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1887 _retired = true;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1888 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1889 };
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1890
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1891 class G1ParScanThreadState : public StackObj {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1892 protected:
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1893 G1CollectedHeap* _g1h;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1894 RefToScanQueue* _refs;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1895 DirtyCardQueue _dcq;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1896 CardTableModRefBS* _ct_bs;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1897 G1RemSet* _g1_rem;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1898
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1899 G1ParGCAllocBuffer _surviving_alloc_buffer;
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1900 G1ParGCAllocBuffer _tenured_alloc_buffer;
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1901 G1ParGCAllocBuffer* _alloc_buffers[GCAllocPurposeCount];
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1902 ageTable _age_table;
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1903
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1904 size_t _alloc_buffer_waste;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1905 size_t _undo_waste;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1906
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1907 OopsInHeapRegionClosure* _evac_failure_cl;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1908 G1ParScanHeapEvacClosure* _evac_cl;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1909 G1ParScanPartialArrayClosure* _partial_scan_cl;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1910
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1911 int _hash_seed;
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4829 diff changeset	1912 uint _queue_num;
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1913
1611 215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1552 diff changeset	1914 size_t _term_attempts;
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1915
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1916 double _start;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1917 double _start_strong_roots;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1918 double _strong_roots_time;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1919 double _start_term;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1920 double _term_time;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1921
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1922 // Map from young-age-index (0 == not young, 1 is youngest) to
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1923 // surviving words. base is what we get back from the malloc call
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1924 size_t* _surviving_young_words_base;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1925 // this points into the array, as we use the first few entries for padding
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1926 size_t* _surviving_young_words;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1927
1709 5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	1928 #define PADDING_ELEM_NUM (DEFAULT_CACHE_LINE_SIZE / sizeof(size_t))
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1929
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1930 void add_to_alloc_buffer_waste(size_t waste) { _alloc_buffer_waste += waste; }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1931
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1932 void add_to_undo_waste(size_t waste) { _undo_waste += waste; }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1933
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1934 DirtyCardQueue& dirty_card_queue() { return _dcq; }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1935 CardTableModRefBS* ctbs() { return _ct_bs; }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1936
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1937 template <class T> void immediate_rs_update(HeapRegion* from, T* p, int tid) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1938 if (!from->is_survivor()) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1939 _g1_rem->par_write_ref(from, p, tid);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1940 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1941 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1942
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1943 template <class T> void deferred_rs_update(HeapRegion* from, T* p, int tid) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1944 // If the new value of the field points to the same region or
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1945 // is the to-space, we don't need to include it in the Rset updates.
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1946 if (!from->is_in_reserved(oopDesc::load_decode_heap_oop(p)) && !from->is_survivor()) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1947 size_t card_index = ctbs()->index_for(p);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1948 // If the card hasn't been added to the buffer, do it.
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1949 if (ctbs()->mark_card_deferred(card_index)) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1950 dirty_card_queue().enqueue((jbyte*)ctbs()->byte_for_index(card_index));
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1951 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1952 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1953 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1954
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1955 public:
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4829 diff changeset	1956 G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num);
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1957
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1958 ~G1ParScanThreadState() {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1959 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words_base);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1960 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1961
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1962 RefToScanQueue* refs() { return _refs; }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1963 ageTable* age_table() { return &_age_table; }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1964
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1965 G1ParGCAllocBuffer* alloc_buffer(GCAllocPurpose purpose) {
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1966 return _alloc_buffers[purpose];
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1967 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1968
1709 5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	1969 size_t alloc_buffer_waste() const { return _alloc_buffer_waste; }
5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	1970 size_t undo_waste() const { return _undo_waste; }
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1971
1862 b14ec34b1e07 6989448: G1: refactor and simplify G1ParScanThreadState jcoomes parents: 1836 diff changeset	1972 #ifdef ASSERT
b14ec34b1e07 6989448: G1: refactor and simplify G1ParScanThreadState jcoomes parents: 1836 diff changeset	1973 bool verify_ref(narrowOop* ref) const;
b14ec34b1e07 6989448: G1: refactor and simplify G1ParScanThreadState jcoomes parents: 1836 diff changeset	1974 bool verify_ref(oop* ref) const;
b14ec34b1e07 6989448: G1: refactor and simplify G1ParScanThreadState jcoomes parents: 1836 diff changeset	1975 bool verify_task(StarTask ref) const;
b14ec34b1e07 6989448: G1: refactor and simplify G1ParScanThreadState jcoomes parents: 1836 diff changeset	1976 #endif // ASSERT
b14ec34b1e07 6989448: G1: refactor and simplify G1ParScanThreadState jcoomes parents: 1836 diff changeset	1977
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1978 template <class T> void push_on_queue(T* ref) {
1862 b14ec34b1e07 6989448: G1: refactor and simplify G1ParScanThreadState jcoomes parents: 1836 diff changeset	1979 assert(verify_ref(ref), "sanity");
1709 5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	1980 refs()->push(ref);
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1981 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1982
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1983 template <class T> void update_rs(HeapRegion* from, T* p, int tid) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1984 if (G1DeferredRSUpdate) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1985 deferred_rs_update(from, p, tid);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1986 } else {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1987 immediate_rs_update(from, p, tid);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1988 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1989 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1990
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1991 HeapWord* allocate_slow(GCAllocPurpose purpose, size_t word_sz) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1992
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1993 HeapWord* obj = NULL;
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1994 size_t gclab_word_size = _g1h->desired_plab_sz(purpose);
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1995 if (word_sz * 100 < gclab_word_size * ParallelGCBufferWastePct) {
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1996 G1ParGCAllocBuffer* alloc_buf = alloc_buffer(purpose);
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1997 assert(gclab_word_size == alloc_buf->word_sz(),
79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	1998 "dynamic resizing is not supported");
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	1999 add_to_alloc_buffer_waste(alloc_buf->words_remaining());
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2000 alloc_buf->retire(false, false);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2001
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	2002 HeapWord* buf = _g1h->par_allocate_during_gc(purpose, gclab_word_size);
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2003 if (buf == NULL) return NULL; // Let caller handle allocation failure.
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2004 // Otherwise.
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2005 alloc_buf->set_buf(buf);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2006
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2007 obj = alloc_buf->allocate(word_sz);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2008 assert(obj != NULL, "buffer was definitely big enough...");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2009 } else {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2010 obj = _g1h->par_allocate_during_gc(purpose, word_sz);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2011 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2012 return obj;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2013 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2014
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2015 HeapWord* allocate(GCAllocPurpose purpose, size_t word_sz) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2016 HeapWord* obj = alloc_buffer(purpose)->allocate(word_sz);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2017 if (obj != NULL) return obj;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2018 return allocate_slow(purpose, word_sz);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2019 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2020
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2021 void undo_allocation(GCAllocPurpose purpose, HeapWord* obj, size_t word_sz) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2022 if (alloc_buffer(purpose)->contains(obj)) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2023 assert(alloc_buffer(purpose)->contains(obj + word_sz - 1),
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2024 "should contain whole object");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2025 alloc_buffer(purpose)->undo_allocation(obj, word_sz);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2026 } else {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2027 CollectedHeap::fill_with_object(obj, word_sz);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2028 add_to_undo_waste(word_sz);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2029 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2030 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2031
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2032 void set_evac_failure_closure(OopsInHeapRegionClosure* evac_failure_cl) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2033 _evac_failure_cl = evac_failure_cl;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2034 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2035 OopsInHeapRegionClosure* evac_failure_closure() {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2036 return _evac_failure_cl;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2037 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2038
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2039 void set_evac_closure(G1ParScanHeapEvacClosure* evac_cl) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2040 _evac_cl = evac_cl;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2041 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2042
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2043 void set_partial_scan_closure(G1ParScanPartialArrayClosure* partial_scan_cl) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2044 _partial_scan_cl = partial_scan_cl;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2045 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2046
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2047 int* hash_seed() { return &_hash_seed; }
4836 d30fa85f9994 6484965: G1: piggy-back liveness accounting phase on marking johnc parents: 4829 diff changeset	2048 uint queue_num() { return _queue_num; }
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2049
1709 5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	2050 size_t term_attempts() const { return _term_attempts; }
1611 215576b54709 6946048: G1: improvements to +PrintGCDetails output tonyp parents: 1552 diff changeset	2051 void note_term_attempt() { _term_attempts++; }
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2052
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2053 void start_strong_roots() {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2054 _start_strong_roots = os::elapsedTime();
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2055 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2056 void end_strong_roots() {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2057 _strong_roots_time += (os::elapsedTime() - _start_strong_roots);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2058 }
1709 5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	2059 double strong_roots_time() const { return _strong_roots_time; }
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2060
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2061 void start_term_time() {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2062 note_term_attempt();
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2063 _start_term = os::elapsedTime();
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2064 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2065 void end_term_time() {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2066 _term_time += (os::elapsedTime() - _start_term);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2067 }
1709 5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	2068 double term_time() const { return _term_time; }
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2069
1709 5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	2070 double elapsed_time() const {
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2071 return os::elapsedTime() - _start;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2072 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2073
1709 5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	2074 static void
5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	2075 print_termination_stats_hdr(outputStream* const st = gclog_or_tty);
5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	2076 void
5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	2077 print_termination_stats(int i, outputStream* const st = gclog_or_tty) const;
5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	2078
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2079 size_t* surviving_young_words() {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2080 // We add on to hide entry 0 which accumulates surviving words for
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2081 // age -1 regions (i.e. non-young ones)
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2082 return _surviving_young_words;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2083 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2084
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2085 void retire_alloc_buffers() {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2086 for (int ap = 0; ap < GCAllocPurposeCount; ++ap) {
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	2087 size_t waste = _alloc_buffers[ap]->words_remaining();
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2088 add_to_alloc_buffer_waste(waste);
1391 79e419e5ea3b 6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize apetrusenko parents: 1313 diff changeset	2089 _alloc_buffers[ap]->retire(true, false);
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2090 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2091 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2092
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2093 template <class T> void deal_with_reference(T* ref_to_scan) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2094 if (has_partial_array_mask(ref_to_scan)) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2095 _partial_scan_cl->do_oop_nv(ref_to_scan);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2096 } else {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2097 // Note: we can use "raw" versions of "region_containing" because
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2098 // "obj_to_scan" is definitely in the heap, and is not in a
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2099 // humongous region.
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2100 HeapRegion* r = _g1h->heap_region_containing_raw(ref_to_scan);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2101 _evac_cl->set_region(r);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2102 _evac_cl->do_oop_nv(ref_to_scan);
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2103 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2104 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2105
1862 b14ec34b1e07 6989448: G1: refactor and simplify G1ParScanThreadState jcoomes parents: 1836 diff changeset	2106 void deal_with_reference(StarTask ref) {
b14ec34b1e07 6989448: G1: refactor and simplify G1ParScanThreadState jcoomes parents: 1836 diff changeset	2107 assert(verify_task(ref), "sanity");
b14ec34b1e07 6989448: G1: refactor and simplify G1ParScanThreadState jcoomes parents: 1836 diff changeset	2108 if (ref.is_narrow()) {
b14ec34b1e07 6989448: G1: refactor and simplify G1ParScanThreadState jcoomes parents: 1836 diff changeset	2109 deal_with_reference((narrowOop*)ref);
b14ec34b1e07 6989448: G1: refactor and simplify G1ParScanThreadState jcoomes parents: 1836 diff changeset	2110 } else {
b14ec34b1e07 6989448: G1: refactor and simplify G1ParScanThreadState jcoomes parents: 1836 diff changeset	2111 deal_with_reference((oop*)ref);
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2112 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2113 }
1862 b14ec34b1e07 6989448: G1: refactor and simplify G1ParScanThreadState jcoomes parents: 1836 diff changeset	2114
b14ec34b1e07 6989448: G1: refactor and simplify G1ParScanThreadState jcoomes parents: 1836 diff changeset	2115 public:
b14ec34b1e07 6989448: G1: refactor and simplify G1ParScanThreadState jcoomes parents: 1836 diff changeset	2116 void trim_queue();
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 838 diff changeset	2117 };
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	2118
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	2119 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_HPP

Mercurial > hg > truffle

annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp @ 4910:caa4652b4414