Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | c9814fadeb38 |
| children | 9646b7ff4d14 |
| rev | line source |
|---|---|
| 342 | 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 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 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 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_HPP | |
| 27 | |
| 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 | 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 | 33 #include "gc_implementation/g1/heapRegionSeq.hpp" |
| 2152 | 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" |
| 6595 | 36 #include "gc_implementation/shared/parGCAllocBuffer.hpp" |
| 1972 | 37 #include "memory/barrierSet.hpp" |
| 38 #include "memory/memRegion.hpp" | |
| 39 #include "memory/sharedHeap.hpp" | |
| 40 | |
| 342 | 41 // A "G1CollectedHeap" is an implementation of a java heap for HotSpot. |
| 42 // It uses the "Garbage First" heap organization and algorithm, which | |
| 43 // may combine concurrent marking with parallel, incremental compaction of | |
| 44 // heap subsets that will yield large amounts of garbage. | |
| 45 | |
| 46 class HeapRegion; | |
| 2173 | 47 class HRRSCleanupTask; |
| 342 | 48 class GenerationSpec; |
| 49 class OopsInHeapRegionClosure; | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
50 class G1KlassScanClosure; |
| 342 | 51 class G1ScanHeapEvacClosure; |
| 52 class ObjectClosure; | |
| 53 class SpaceClosure; | |
| 54 class CompactibleSpaceClosure; | |
| 55 class Space; | |
| 56 class G1CollectorPolicy; | |
| 57 class GenRemSet; | |
| 58 class G1RemSet; | |
| 59 class HeapRegionRemSetIterator; | |
| 60 class ConcurrentMark; | |
| 61 class ConcurrentMarkThread; | |
| 62 class ConcurrentG1Refine; | |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
63 class GenerationCounters; |
| 342 | 64 |
| 6197 | 65 typedef OverflowTaskQueue<StarTask, mtGC> RefToScanQueue; |
| 66 typedef GenericTaskQueueSet<RefToScanQueue, mtGC> RefToScanQueueSet; | |
| 342 | 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 | 71 enum GCAllocPurpose { |
| 72 GCAllocForTenured, | |
| 73 GCAllocForSurvived, | |
| 74 GCAllocPurposeCount | |
| 75 }; | |
| 76 | |
| 6197 | 77 class YoungList : public CHeapObj<mtGC> { |
| 342 | 78 private: |
| 79 G1CollectedHeap* _g1h; | |
| 80 | |
| 81 HeapRegion* _head; | |
| 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 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
88 uint _length; |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
89 uint _survivor_length; |
| 342 | 90 |
| 91 size_t _last_sampled_rs_lengths; | |
| 92 size_t _sampled_rs_lengths; | |
| 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 | 95 |
| 96 public: | |
| 97 YoungList(G1CollectedHeap* g1h); | |
| 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; } |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
104 uint length() { return _length; } |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
105 uint survivor_length() { return _survivor_length; } |
| 342 | 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"); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
114 return (size_t) (length() - survivor_length()) * HeapRegion::GrainBytes; |
|
3764
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() { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
117 return (size_t) survivor_length() * HeapRegion::GrainBytes; |
|
3764
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 | 120 void rs_length_sampling_init(); |
| 121 bool rs_length_sampling_more(); | |
| 122 void rs_length_sampling_next(); | |
| 123 | |
| 124 void reset_sampled_info() { | |
| 125 _last_sampled_rs_lengths = 0; | |
| 126 } | |
| 127 size_t sampled_rs_lengths() { return _last_sampled_rs_lengths; } | |
| 128 | |
| 129 // for development purposes | |
| 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 | 139 HeapRegion* first_region() { return _head; } |
| 140 HeapRegion* first_survivor_region() { return _survivor_head; } | |
| 545 | 141 HeapRegion* last_survivor_region() { return _survivor_tail; } |
| 342 | 142 |
| 143 // debugging | |
| 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 | 146 void print(); |
| 147 }; | |
| 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 | 189 class RefineCardTableEntryClosure; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
190 |
| 342 | 191 class G1CollectedHeap : public SharedHeap { |
| 192 friend class VM_G1CollectForAllocation; | |
| 193 friend class VM_G1CollectFull; | |
| 194 friend class VM_G1IncCollectionPause; | |
| 195 friend class VMStructs; | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
196 friend class MutatorAllocRegion; |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
197 friend class SurvivorGCAllocRegion; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
198 friend class OldGCAllocRegion; |
| 342 | 199 |
| 200 // Closures used in implementation. | |
| 5987 | 201 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
| 202 friend class G1ParCopyClosure; | |
| 342 | 203 friend class G1IsAliveClosure; |
| 204 friend class G1EvacuateFollowersClosure; | |
| 205 friend class G1ParScanThreadState; | |
| 206 friend class G1ParScanClosureSuper; | |
| 207 friend class G1ParEvacuateFollowersClosure; | |
| 208 friend class G1ParTask; | |
| 209 friend class G1FreeGarbageRegionClosure; | |
| 210 friend class RefineCardTableEntryClosure; | |
| 211 friend class G1PrepareCompactClosure; | |
| 212 friend class RegionSorter; | |
| 2152 | 213 friend class RegionResetter; |
| 342 | 214 friend class CountRCClosure; |
| 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 | 217 |
| 218 // Other related classes. | |
| 219 friend class G1MarkSweep; | |
| 220 | |
| 221 private: | |
| 222 // The one and only G1CollectedHeap, so static functions can find it. | |
| 223 static G1CollectedHeap* _g1h; | |
| 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 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
227 // Storage for the G1 heap. |
| 342 | 228 VirtualSpace _g1_storage; |
| 229 MemRegion _g1_reserved; | |
| 230 | |
| 231 // The part of _g1_storage that is currently committed. | |
| 232 MemRegion _g1_committed; | |
| 233 | |
| 2152 | 234 // The master free list. It will satisfy all new region allocations. |
| 235 MasterFreeRegionList _free_list; | |
| 236 | |
| 237 // The secondary free list which contains regions that have been | |
| 238 // freed up during the cleanup process. This will be appended to the | |
| 239 // master free list when appropriate. | |
| 240 SecondaryFreeRegionList _secondary_free_list; | |
| 241 | |
| 4072 | 242 // It keeps track of the old regions. |
| 243 MasterOldRegionSet _old_set; | |
| 244 | |
| 2152 | 245 // It keeps track of the humongous regions. |
| 246 MasterHumongousRegionSet _humongous_set; | |
| 342 | 247 |
| 248 // The number of regions we could create by expansion. | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
249 uint _expansion_regions; |
| 342 | 250 |
| 251 // The block offset table for the G1 heap. | |
| 252 G1BlockOffsetSharedArray* _bot_shared; | |
| 253 | |
| 4072 | 254 // Tears down the region sets / lists so that they are empty and the |
| 255 // regions on the heap do not belong to a region set / list. The | |
| 256 // only exception is the humongous set which we leave unaltered. If | |
| 257 // free_list_only is true, it will only tear down the master free | |
| 258 // list. It is called before a Full GC (free_list_only == false) or | |
| 259 // before heap shrinking (free_list_only == true). | |
| 260 void tear_down_region_sets(bool free_list_only); | |
| 261 | |
| 262 // Rebuilds the region sets / lists so that they are repopulated to | |
| 263 // reflect the contents of the heap. The only exception is the | |
| 264 // humongous set which was not torn down in the first place. If | |
| 265 // free_list_only is true, it will only rebuild the master free | |
| 266 // list. It is called after a Full GC (free_list_only == false) or | |
| 267 // after heap shrinking (free_list_only == true). | |
| 268 void rebuild_region_sets(bool free_list_only); | |
| 342 | 269 |
| 270 // The sequence of all heap regions in the heap. | |
| 3766 | 271 HeapRegionSeq _hrs; |
| 342 | 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 | 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 |
| 6595 | 280 // PLAB sizing policy for survivors. |
| 281 PLABStats _survivor_plab_stats; | |
| 282 | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
283 // 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
|
284 // old objects. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
285 OldGCAllocRegion _old_gc_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
286 |
| 6595 | 287 // PLAB sizing policy for tenured objects. |
| 288 PLABStats _old_plab_stats; | |
| 289 | |
| 290 PLABStats* stats_for_purpose(GCAllocPurpose purpose) { | |
| 291 PLABStats* stats = NULL; | |
| 292 | |
| 293 switch (purpose) { | |
| 294 case GCAllocForSurvived: | |
| 295 stats = &_survivor_plab_stats; | |
| 296 break; | |
| 297 case GCAllocForTenured: | |
| 298 stats = &_old_plab_stats; | |
| 299 break; | |
| 300 default: | |
| 301 assert(false, "unrecognized GCAllocPurpose"); | |
| 302 } | |
| 303 | |
| 304 return stats; | |
| 305 } | |
| 306 | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
307 // 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
|
308 // 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
|
309 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
|
310 |
|
4781
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
311 // 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
|
312 // 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
|
313 // 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
|
314 // 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
|
315 // 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
|
316 // start of each GC. |
|
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
317 bool _expand_heap_after_alloc_failure; |
|
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
318 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
319 // 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
|
320 void init_mutator_alloc_region(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
321 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
322 // It releases the mutator alloc region. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
323 void release_mutator_alloc_region(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
324 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
325 // 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
|
326 void init_gc_alloc_regions(); |
| 342 | 327 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
328 // 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
|
329 void release_gc_alloc_regions(); |
| 342 | 330 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
331 // 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
|
332 // before a Full GC. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
333 void abandon_gc_alloc_regions(); |
| 342 | 334 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
335 // Helper for monitoring and management support. |
|
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
336 G1MonitoringSupport* _g1mm; |
|
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
337 |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
338 // Determines PLAB size for a particular allocation purpose. |
| 6595 | 339 size_t desired_plab_sz(GCAllocPurpose purpose); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
340 |
| 342 | 341 // Outside of GC pauses, the number of bytes used in all regions other |
| 342 // than the current allocation region. | |
| 343 size_t _summary_bytes_used; | |
| 344 | |
| 526 | 345 // This is used for a quick test on whether a reference points into |
| 346 // the collection set or not. Basically, we have an array, with one | |
| 347 // byte per region, and that byte denotes whether the corresponding | |
| 348 // region is in the collection set or not. The entry corresponding | |
| 349 // the bottom of the heap, i.e., region 0, is pointed to by | |
| 350 // _in_cset_fast_test_base. The _in_cset_fast_test field has been | |
| 351 // biased so that it actually points to address 0 of the address | |
| 352 // space, to make the test as fast as possible (we can simply shift | |
| 353 // the address to address into it, instead of having to subtract the | |
| 354 // bottom of the heap from the address before shifting it; basically | |
| 355 // it works in the same way the card table works). | |
| 356 bool* _in_cset_fast_test; | |
| 357 | |
| 358 // The allocated array used for the fast test on whether a reference | |
| 359 // points into the collection set or not. This field is also used to | |
| 360 // free the array. | |
| 361 bool* _in_cset_fast_test_base; | |
| 362 | |
| 363 // The length of the _in_cset_fast_test_base array. | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
364 uint _in_cset_fast_test_length; |
| 526 | 365 |
|
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
|
366 volatile unsigned _gc_time_stamp; |
| 342 | 367 |
| 368 size_t* _surviving_young_words; | |
| 369 | |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
370 G1HRPrinter _hr_printer; |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
371 |
| 342 | 372 void setup_surviving_young_words(); |
| 373 void update_surviving_young_words(size_t* surv_young_words); | |
| 374 void cleanup_surviving_young_words(); | |
| 375 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
376 // 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
|
377 // 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
|
378 // explicitly started if: |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
379 // (a) cause == _gc_locker and +GCLockerInvokesConcurrent, or |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
380 // (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
|
381 // (c) cause == _g1_humongous_allocation |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
382 bool should_do_concurrent_full_gc(GCCause::Cause cause); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
383 |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
384 // Keeps track of how many "old marking cycles" (i.e., Full GCs or |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
385 // concurrent cycles) we have started. |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
386 volatile unsigned int _old_marking_cycles_started; |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
387 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
388 // Keeps track of how many "old marking cycles" (i.e., Full GCs or |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
389 // concurrent cycles) we have completed. |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
390 volatile unsigned int _old_marking_cycles_completed; |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
391 |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2435
diff
changeset
|
392 // 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
|
393 // 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
|
394 // 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
|
395 // frequent marking cycles and stress the cleanup / concurrent |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2435
diff
changeset
|
396 // 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
|
397 // 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
|
398 void allocate_dummy_regions() PRODUCT_RETURN; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2435
diff
changeset
|
399 |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
400 // Clear RSets after a compaction. It also resets the GC time stamps. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
401 void clear_rsets_post_compaction(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
402 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
403 // If the HR printer is active, dump the state of the regions in the |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
404 // heap after a compaction. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
405 void print_hrs_post_compaction(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
406 |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
407 double verify(bool guard, const char* msg); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
408 void verify_before_gc(); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
409 void verify_after_gc(); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
410 |
| 1973 | 411 // These are macros so that, if the assert fires, we get the correct |
| 412 // line number, file, etc. | |
| 413 | |
| 2361 | 414 #define heap_locking_asserts_err_msg(_extra_message_) \ |
| 2152 | 415 err_msg("%s : Heap_lock locked: %s, at safepoint: %s, is VM thread: %s", \ |
| 2361 | 416 (_extra_message_), \ |
| 2152 | 417 BOOL_TO_STR(Heap_lock->owned_by_self()), \ |
| 418 BOOL_TO_STR(SafepointSynchronize::is_at_safepoint()), \ | |
| 419 BOOL_TO_STR(Thread::current()->is_VM_thread())) | |
| 1973 | 420 |
| 421 #define assert_heap_locked() \ | |
| 422 do { \ | |
| 423 assert(Heap_lock->owned_by_self(), \ | |
| 424 heap_locking_asserts_err_msg("should be holding the Heap_lock")); \ | |
| 425 } while (0) | |
| 426 | |
| 2361 | 427 #define assert_heap_locked_or_at_safepoint(_should_be_vm_thread_) \ |
| 1973 | 428 do { \ |
| 429 assert(Heap_lock->owned_by_self() || \ | |
| 2152 | 430 (SafepointSynchronize::is_at_safepoint() && \ |
| 2361 | 431 ((_should_be_vm_thread_) == Thread::current()->is_VM_thread())), \ |
| 1973 | 432 heap_locking_asserts_err_msg("should be holding the Heap_lock or " \ |
| 433 "should be at a safepoint")); \ | |
| 434 } while (0) | |
| 435 | |
| 436 #define assert_heap_locked_and_not_at_safepoint() \ | |
| 437 do { \ | |
| 438 assert(Heap_lock->owned_by_self() && \ | |
| 439 !SafepointSynchronize::is_at_safepoint(), \ | |
| 440 heap_locking_asserts_err_msg("should be holding the Heap_lock and " \ | |
| 441 "should not be at a safepoint")); \ | |
| 442 } while (0) | |
| 443 | |
| 444 #define assert_heap_not_locked() \ | |
| 445 do { \ | |
| 446 assert(!Heap_lock->owned_by_self(), \ | |
| 447 heap_locking_asserts_err_msg("should not be holding the Heap_lock")); \ | |
| 448 } while (0) | |
| 449 | |
| 450 #define assert_heap_not_locked_and_not_at_safepoint() \ | |
| 451 do { \ | |
| 452 assert(!Heap_lock->owned_by_self() && \ | |
| 453 !SafepointSynchronize::is_at_safepoint(), \ | |
| 454 heap_locking_asserts_err_msg("should not be holding the Heap_lock and " \ | |
| 455 "should not be at a safepoint")); \ | |
| 456 } while (0) | |
| 457 | |
| 2361 | 458 #define assert_at_safepoint(_should_be_vm_thread_) \ |
| 1973 | 459 do { \ |
| 2152 | 460 assert(SafepointSynchronize::is_at_safepoint() && \ |
| 2361 | 461 ((_should_be_vm_thread_) == Thread::current()->is_VM_thread()), \ |
| 1973 | 462 heap_locking_asserts_err_msg("should be at a safepoint")); \ |
| 463 } while (0) | |
| 464 | |
| 465 #define assert_not_at_safepoint() \ | |
| 466 do { \ | |
| 467 assert(!SafepointSynchronize::is_at_safepoint(), \ | |
| 468 heap_locking_asserts_err_msg("should not be at a safepoint")); \ | |
| 469 } while (0) | |
| 470 | |
| 342 | 471 protected: |
| 472 | |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
473 // The young region list. |
| 342 | 474 YoungList* _young_list; |
| 475 | |
| 476 // The current policy object for the collector. | |
| 477 G1CollectorPolicy* _g1_policy; | |
| 478 | |
| 2152 | 479 // 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
|
480 // 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
|
481 // check whether there's anything available on the |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
482 // 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
|
483 // that list, if _free_regions_coming is set. |
| 2361 | 484 HeapRegion* new_region_try_secondary_free_list(); |
| 342 | 485 |
| 2361 | 486 // Try to allocate a single non-humongous HeapRegion sufficient for |
| 487 // an allocation of the given word_size. If do_expand is true, | |
| 488 // attempt to expand the heap if necessary to satisfy the allocation | |
| 489 // request. | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
490 HeapRegion* new_region(size_t word_size, bool do_expand); |
| 342 | 491 |
| 2361 | 492 // Attempt to satisfy a humongous allocation request of the given |
| 493 // size by finding a contiguous set of free regions of num_regions | |
| 494 // length and remove them from the master free list. Return the | |
| 3766 | 495 // index of the first region or G1_NULL_HRS_INDEX if the search |
| 496 // was unsuccessful. | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
497 uint humongous_obj_allocate_find_first(uint num_regions, |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
498 size_t word_size); |
| 342 | 499 |
| 2361 | 500 // Initialize a contiguous set of free regions of length num_regions |
| 501 // and starting at index first so that they appear as a single | |
| 502 // humongous region. | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
503 HeapWord* humongous_obj_allocate_initialize_regions(uint first, |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
504 uint num_regions, |
| 2361 | 505 size_t word_size); |
| 506 | |
| 507 // Attempt to allocate a humongous object of the given size. Return | |
| 508 // NULL if unsuccessful. | |
| 2152 | 509 HeapWord* humongous_obj_allocate(size_t word_size); |
| 1973 | 510 |
| 511 // The following two methods, allocate_new_tlab() and | |
| 512 // mem_allocate(), are the two main entry points from the runtime | |
| 513 // into the G1's allocation routines. They have the following | |
| 514 // assumptions: | |
| 515 // | |
| 516 // * They should both be called outside safepoints. | |
| 517 // | |
| 518 // * They should both be called without holding the Heap_lock. | |
| 519 // | |
| 520 // * All allocation requests for new TLABs should go to | |
| 521 // allocate_new_tlab(). | |
| 522 // | |
|
3774
c9ca3f51cf41
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
3772
diff
changeset
|
523 // * All non-TLAB allocation requests should go to mem_allocate(). |
| 1973 | 524 // |
| 525 // * If either call cannot satisfy the allocation request using the | |
| 526 // current allocating region, they will try to get a new one. If | |
| 527 // this fails, they will attempt to do an evacuation pause and | |
| 528 // retry the allocation. | |
| 529 // | |
| 530 // * If all allocation attempts fail, even after trying to schedule | |
| 531 // an evacuation pause, allocate_new_tlab() will return NULL, | |
| 532 // whereas mem_allocate() will attempt a heap expansion and/or | |
| 533 // schedule a Full GC. | |
| 534 // | |
| 535 // * We do not allow humongous-sized TLABs. So, allocate_new_tlab | |
| 536 // should never be called with word_size being humongous. All | |
| 537 // humongous allocation requests should go to mem_allocate() which | |
| 538 // will satisfy them with a special path. | |
| 539 | |
| 540 virtual HeapWord* allocate_new_tlab(size_t word_size); | |
| 541 | |
| 542 virtual HeapWord* mem_allocate(size_t word_size, | |
| 543 bool* gc_overhead_limit_was_exceeded); | |
| 342 | 544 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
545 // 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
|
546 // 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
|
547 // 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
|
548 // 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
|
549 // 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
|
550 // 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
|
551 // 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
|
552 // Heap_lock just to read the GC count. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
553 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
554 // 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
|
555 // 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
|
556 // should only be used for non-humongous allocations. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
557 inline HeapWord* attempt_allocation(size_t word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
558 unsigned int* gc_count_before_ret); |
| 342 | 559 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
560 // 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
|
561 // retry the allocation attempt, potentially scheduling a GC |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
562 // 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
|
563 HeapWord* attempt_allocation_slow(size_t word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
564 unsigned int* gc_count_before_ret); |
|
2134
b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
tonyp
parents:
2133
diff
changeset
|
565 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
566 // 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
|
567 // potentially schedule a GC pause. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
568 HeapWord* attempt_allocation_humongous(size_t word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
569 unsigned int* gc_count_before_ret); |
| 1973 | 570 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
571 // 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
|
572 // 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
|
573 // 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
|
574 // or not. |
| 1973 | 575 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
|
576 bool expect_null_mutator_alloc_region); |
| 1973 | 577 |
| 578 // It dirties the cards that cover the block so that so that the post | |
| 579 // write barrier never queues anything when updating objects on this | |
| 580 // block. It is assumed (and in fact we assert) that the block | |
| 581 // belongs to a young region. | |
| 582 inline void dirty_young_block(HeapWord* start, size_t word_size); | |
| 342 | 583 |
| 584 // Allocate blocks during garbage collection. Will ensure an | |
| 585 // allocation region, either by picking one or expanding the | |
| 586 // heap, and then allocate a block of the given size. The block | |
| 587 // may not be a humongous - it must fit into a single heap region. | |
| 588 HeapWord* par_allocate_during_gc(GCAllocPurpose purpose, size_t word_size); | |
| 589 | |
| 590 HeapWord* allocate_during_gc_slow(GCAllocPurpose purpose, | |
| 591 HeapRegion* alloc_region, | |
| 592 bool par, | |
| 593 size_t word_size); | |
| 594 | |
| 595 // Ensure that no further allocations can happen in "r", bearing in mind | |
| 596 // that parallel threads might be attempting allocations. | |
| 597 void par_allocate_remaining_space(HeapRegion* r); | |
| 598 | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
599 // 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
|
600 inline HeapWord* survivor_attempt_allocation(size_t word_size); |
| 545 | 601 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
602 // 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
|
603 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
|
604 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
605 // 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
|
606 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
607 // For mutator alloc regions. |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
608 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
|
609 void retire_mutator_alloc_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
610 size_t allocated_bytes); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
611 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
612 // For GC alloc regions. |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
613 HeapRegion* new_gc_alloc_region(size_t word_size, uint count, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
614 GCAllocPurpose ap); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
615 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
|
616 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
|
617 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
618 // - if explicit_gc is true, the GC is for a System.gc() or a heap |
| 1973 | 619 // inspection request and should collect the entire heap |
| 620 // - if clear_all_soft_refs is true, all soft references should be | |
| 621 // cleared during the GC | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
622 // - if explicit_gc is false, word_size describes the allocation that |
| 1973 | 623 // the GC should attempt (at least) to satisfy |
| 624 // - it returns false if it is unable to do the collection due to the | |
| 625 // GC locker being active, true otherwise | |
| 626 bool do_collection(bool explicit_gc, | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
627 bool clear_all_soft_refs, |
| 342 | 628 size_t word_size); |
| 629 | |
| 630 // Callback from VM_G1CollectFull operation. | |
| 631 // Perform a full collection. | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
632 virtual void do_full_collection(bool clear_all_soft_refs); |
| 342 | 633 |
| 634 // Resize the heap if necessary after a full collection. If this is | |
| 635 // after a collect-for allocation, "word_size" is the allocation size, | |
| 636 // and will be considered part of the used portion of the heap. | |
| 637 void resize_if_necessary_after_full_collection(size_t word_size); | |
| 638 | |
| 639 // Callback from VM_G1CollectForAllocation operation. | |
| 640 // This function does everything necessary/possible to satisfy a | |
| 641 // failed allocation request (including collection, expansion, etc.) | |
| 1973 | 642 HeapWord* satisfy_failed_allocation(size_t word_size, bool* succeeded); |
| 342 | 643 |
| 644 // Attempting to expand the heap sufficiently | |
| 645 // to support an allocation of the given "word_size". If | |
| 646 // successful, perform the allocation and return the address of the | |
| 647 // allocated block, or else "NULL". | |
| 1973 | 648 HeapWord* expand_and_allocate(size_t word_size); |
| 342 | 649 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
650 // Process any reference objects discovered during |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
651 // an incremental evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
652 void process_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
653 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
654 // Enqueue any remaining discovered references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
655 // after processing. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
656 void enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
657 |
| 342 | 658 public: |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
659 |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
660 G1MonitoringSupport* g1mm() { |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
661 assert(_g1mm != NULL, "should have been initialized"); |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
662 return _g1mm; |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
663 } |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
664 |
| 342 | 665 // 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
|
666 // 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
|
667 // false otherwise. |
| 342 | 668 // (Rounds up to a HeapRegion boundary.) |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
669 bool expand(size_t expand_bytes); |
| 342 | 670 |
| 671 // Do anything common to GC's. | |
| 672 virtual void gc_prologue(bool full); | |
| 673 virtual void gc_epilogue(bool full); | |
| 674 | |
| 526 | 675 // We register a region with the fast "in collection set" test. We |
| 676 // simply set to true the array slot corresponding to this region. | |
| 677 void register_region_with_in_cset_fast_test(HeapRegion* r) { | |
| 678 assert(_in_cset_fast_test_base != NULL, "sanity"); | |
| 679 assert(r->in_collection_set(), "invariant"); | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
680 uint index = r->hrs_index(); |
| 3766 | 681 assert(index < _in_cset_fast_test_length, "invariant"); |
| 526 | 682 assert(!_in_cset_fast_test_base[index], "invariant"); |
| 683 _in_cset_fast_test_base[index] = true; | |
| 684 } | |
| 685 | |
| 686 // This is a fast test on whether a reference points into the | |
| 687 // collection set or not. It does not assume that the reference | |
| 688 // points into the heap; if it doesn't, it will return false. | |
| 689 bool in_cset_fast_test(oop obj) { | |
| 690 assert(_in_cset_fast_test != NULL, "sanity"); | |
| 691 if (_g1_committed.contains((HeapWord*) obj)) { | |
| 692 // no need to subtract the bottom of the heap from obj, | |
| 693 // _in_cset_fast_test is biased | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
694 uintx index = (uintx) obj >> HeapRegion::LogOfHRGrainBytes; |
| 526 | 695 bool ret = _in_cset_fast_test[index]; |
| 696 // let's make sure the result is consistent with what the slower | |
| 697 // test returns | |
| 698 assert( ret || !obj_in_cs(obj), "sanity"); | |
| 699 assert(!ret || obj_in_cs(obj), "sanity"); | |
| 700 return ret; | |
| 701 } else { | |
| 702 return false; | |
| 703 } | |
| 704 } | |
| 705 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
706 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
|
707 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
|
708 memset(_in_cset_fast_test_base, false, |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
709 (size_t) _in_cset_fast_test_length * sizeof(bool)); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
710 } |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
711 |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
712 // This is called at the start of either a concurrent cycle or a Full |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
713 // GC to update the number of old marking cycles started. |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
714 void increment_old_marking_cycles_started(); |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
715 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
716 // This is called at the end of either a concurrent cycle or a Full |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
717 // GC to update the number of old marking cycles completed. Those two |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
718 // 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
|
719 // 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
|
720 // 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
|
721 // 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
|
722 // 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
|
723 // 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
|
724 // 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
|
725 // in this nesting (i.e., the concurrent cycle). Further nesting is |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
726 // not currently supported. The end of this call also notifies |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1991
diff
changeset
|
727 // 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
|
728 // 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
|
729 // +ExplicitGCInvokesConcurrent). |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
730 void increment_old_marking_cycles_completed(bool concurrent); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
731 |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
732 unsigned int old_marking_cycles_completed() { |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
733 return _old_marking_cycles_completed; |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
734 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
735 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
736 G1HRPrinter* hr_printer() { return &_hr_printer; } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
737 |
| 342 | 738 protected: |
| 739 | |
| 740 // Shrink the garbage-first heap by at most the given size (in bytes!). | |
| 741 // (Rounds down to a HeapRegion boundary.) | |
| 742 virtual void shrink(size_t expand_bytes); | |
| 743 void shrink_helper(size_t expand_bytes); | |
| 744 | |
| 1709 | 745 #if TASKQUEUE_STATS |
| 746 static void print_taskqueue_stats_hdr(outputStream* const st = gclog_or_tty); | |
| 747 void print_taskqueue_stats(outputStream* const st = gclog_or_tty) const; | |
| 748 void reset_taskqueue_stats(); | |
| 749 #endif // TASKQUEUE_STATS | |
| 750 | |
| 1973 | 751 // Schedule the VM operation that will do an evacuation pause to |
| 752 // satisfy an allocation request of word_size. *succeeded will | |
| 753 // return whether the VM operation was successful (it did do an | |
| 754 // evacuation pause) or not (another thread beat us to it or the GC | |
| 755 // locker was active). Given that we should not be holding the | |
| 756 // Heap_lock when we enter this method, we will pass the | |
| 757 // gc_count_before (i.e., total_collections()) as a parameter since | |
| 758 // it has to be read while holding the Heap_lock. Currently, both | |
| 759 // methods that call do_collection_pause() release the Heap_lock | |
| 760 // before the call, so it's easy to read gc_count_before just before. | |
| 761 HeapWord* do_collection_pause(size_t word_size, | |
| 762 unsigned int gc_count_before, | |
| 763 bool* succeeded); | |
| 342 | 764 |
| 765 // The guts of the incremental collection pause, executed by the vm | |
| 1973 | 766 // thread. It returns false if it is unable to do the collection due |
| 767 // to the GC locker being active, true otherwise | |
| 768 bool do_collection_pause_at_safepoint(double target_pause_time_ms); | |
| 342 | 769 |
| 770 // Actually do the work of evacuating the collection set. | |
| 1973 | 771 void evacuate_collection_set(); |
| 342 | 772 |
| 773 // The g1 remembered set of the heap. | |
| 774 G1RemSet* _g1_rem_set; | |
| 775 // And it's mod ref barrier set, used to track updates for the above. | |
| 776 ModRefBarrierSet* _mr_bs; | |
| 777 | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
545
diff
changeset
|
778 // 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
|
779 // concurrently after the collection. |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
545
diff
changeset
|
780 DirtyCardQueueSet _dirty_card_queue_set; |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
545
diff
changeset
|
781 |
| 342 | 782 // The Heap Region Rem Set Iterator. |
| 783 HeapRegionRemSetIterator** _rem_set_iterator; | |
| 784 | |
| 785 // The closure used to refine a single card. | |
| 786 RefineCardTableEntryClosure* _refine_cte_cl; | |
| 787 | |
| 788 // A function to check the consistency of dirty card logs. | |
| 789 void check_ct_logs_at_safepoint(); | |
| 790 | |
| 1705 | 791 // A DirtyCardQueueSet that is used to hold cards that contain |
| 792 // references into the current collection set. This is used to | |
| 793 // update the remembered sets of the regions in the collection | |
| 794 // set in the event of an evacuation failure. | |
| 795 DirtyCardQueueSet _into_cset_dirty_card_queue_set; | |
| 796 | |
| 342 | 797 // After a collection pause, make the regions in the CS into free |
| 798 // regions. | |
| 799 void free_collection_set(HeapRegion* cs_head); | |
| 800 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
801 // 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
|
802 // 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
|
803 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
|
804 |
| 342 | 805 // Applies "scan_non_heap_roots" to roots outside the heap, |
| 806 // "scan_rs" to roots inside the heap (having done "set_region" to | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
807 // indicate the region in which the root resides), |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
808 // and does "scan_metadata" If "scan_rs" is |
| 342 | 809 // NULL, then this step is skipped. The "worker_i" |
| 810 // param is for use with parallel roots processing, and should be | |
| 811 // the "i" of the calling parallel worker thread's work(i) function. | |
| 812 // In the sequential case this param will be ignored. | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
813 void g1_process_strong_roots(bool is_scavenging, |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4836
diff
changeset
|
814 ScanningOption so, |
| 342 | 815 OopClosure* scan_non_heap_roots, |
| 816 OopsInHeapRegionClosure* scan_rs, | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
817 G1KlassScanClosure* scan_klasses, |
| 342 | 818 int worker_i); |
| 819 | |
| 820 // Apply "blk" to all the weak roots of the system. These include | |
| 821 // JNI weak roots, the code cache, system dictionary, symbol table, | |
| 822 // string table, and referents of reachable weak refs. | |
| 823 void g1_process_weak_roots(OopClosure* root_closure, | |
| 824 OopClosure* non_root_closure); | |
| 825 | |
| 2361 | 826 // Frees a non-humongous region by initializing its contents and |
| 2152 | 827 // adding it to the free list that's passed as a parameter (this is |
| 828 // usually a local list which will be appended to the master free | |
| 829 // list later). The used bytes of freed regions are accumulated in | |
| 830 // pre_used. If par is true, the region's RSet will not be freed | |
| 831 // up. The assumption is that this will be done later. | |
| 832 void free_region(HeapRegion* hr, | |
| 833 size_t* pre_used, | |
| 834 FreeRegionList* free_list, | |
| 835 bool par); | |
| 342 | 836 |
| 2361 | 837 // Frees a humongous region by collapsing it into individual regions |
| 838 // and calling free_region() for each of them. The freed regions | |
| 839 // will be added to the free list that's passed as a parameter (this | |
| 840 // is usually a local list which will be appended to the master free | |
| 841 // list later). The used bytes of freed regions are accumulated in | |
| 842 // pre_used. If par is true, the region's RSet will not be freed | |
| 843 // up. The assumption is that this will be done later. | |
| 2152 | 844 void free_humongous_region(HeapRegion* hr, |
| 845 size_t* pre_used, | |
| 846 FreeRegionList* free_list, | |
| 847 HumongousRegionSet* humongous_proxy_set, | |
| 848 bool par); | |
| 342 | 849 |
| 3766 | 850 // Notifies all the necessary spaces that the committed space has |
| 851 // been updated (either expanded or shrunk). It should be called | |
| 852 // after _g1_storage is updated. | |
| 853 void update_committed_space(HeapWord* old_end, HeapWord* new_end); | |
| 854 | |
| 342 | 855 // The concurrent marker (and the thread it runs in.) |
| 856 ConcurrentMark* _cm; | |
| 857 ConcurrentMarkThread* _cmThread; | |
| 858 bool _mark_in_progress; | |
| 859 | |
| 860 // The concurrent refiner. | |
| 861 ConcurrentG1Refine* _cg1r; | |
| 862 | |
| 863 // The parallel task queues | |
| 864 RefToScanQueueSet *_task_queues; | |
| 865 | |
| 866 // True iff a evacuation has failed in the current collection. | |
| 867 bool _evacuation_failed; | |
| 868 | |
| 869 // Set the attribute indicating whether evacuation has failed in the | |
| 870 // current collection. | |
| 871 void set_evacuation_failed(bool b) { _evacuation_failed = b; } | |
| 872 | |
| 873 // Failed evacuations cause some logical from-space objects to have | |
| 874 // forwarding pointers to themselves. Reset them. | |
| 875 void remove_self_forwarding_pointers(); | |
| 876 | |
| 877 // When one is non-null, so is the other. Together, they each pair is | |
| 878 // an object with a preserved mark, and its mark value. | |
| 879 GrowableArray<oop>* _objs_with_preserved_marks; | |
| 880 GrowableArray<markOop>* _preserved_marks_of_objs; | |
| 881 | |
| 882 // Preserve the mark of "obj", if necessary, in preparation for its mark | |
| 883 // word being overwritten with a self-forwarding-pointer. | |
| 884 void preserve_mark_if_necessary(oop obj, markOop m); | |
| 885 | |
| 886 // The stack of evac-failure objects left to be scanned. | |
| 887 GrowableArray<oop>* _evac_failure_scan_stack; | |
| 888 // The closure to apply to evac-failure objects. | |
| 889 | |
| 890 OopsInHeapRegionClosure* _evac_failure_closure; | |
| 891 // Set the field above. | |
| 892 void | |
| 893 set_evac_failure_closure(OopsInHeapRegionClosure* evac_failure_closure) { | |
| 894 _evac_failure_closure = evac_failure_closure; | |
| 895 } | |
| 896 | |
| 897 // Push "obj" on the scan stack. | |
| 898 void push_on_evac_failure_scan_stack(oop obj); | |
| 899 // Process scan stack entries until the stack is empty. | |
| 900 void drain_evac_failure_scan_stack(); | |
| 901 // True iff an invocation of "drain_scan_stack" is in progress; to | |
| 902 // prevent unnecessary recursion. | |
| 903 bool _drain_in_progress; | |
| 904 | |
| 905 // Do any necessary initialization for evacuation-failure handling. | |
| 906 // "cl" is the closure that will be used to process evac-failure | |
| 907 // objects. | |
| 908 void init_for_evac_failure(OopsInHeapRegionClosure* cl); | |
| 909 // Do any necessary cleanup for evacuation-failure handling data | |
| 910 // structures. | |
| 911 void finalize_for_evac_failure(); | |
| 912 | |
| 913 // 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
|
914 oop handle_evacuation_failure_par(OopsInHeapRegionClosure* cl, oop obj); |
| 342 | 915 void handle_evacuation_failure_common(oop obj, markOop m); |
| 916 | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
917 #ifndef PRODUCT |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
918 // Support for forcing evacuation failures. Analogous to |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
919 // PromotionFailureALot for the other collectors. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
920 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
921 // Records whether G1EvacuationFailureALot should be in effect |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
922 // for the current GC |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
923 bool _evacuation_failure_alot_for_current_gc; |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
924 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
925 // Used to record the GC number for interval checking when |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
926 // determining whether G1EvaucationFailureALot is in effect |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
927 // for the current GC. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
928 size_t _evacuation_failure_alot_gc_number; |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
929 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
930 // Count of the number of evacuations between failures. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
931 volatile size_t _evacuation_failure_alot_count; |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
932 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
933 // Set whether G1EvacuationFailureALot should be in effect |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
934 // for the current GC (based upon the type of GC and which |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
935 // command line flags are set); |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
936 inline bool evacuation_failure_alot_for_gc_type(bool gcs_are_young, |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
937 bool during_initial_mark, |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
938 bool during_marking); |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
939 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
940 inline void set_evacuation_failure_alot_for_current_gc(); |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
941 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
942 // Return true if it's time to cause an evacuation failure. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
943 inline bool evacuation_should_fail(); |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
944 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
945 // Reset the G1EvacuationFailureALot counters. Should be called at |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
946 // the end of an evacuation pause in which an evacuation failure ocurred. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
947 inline void reset_evacuation_should_fail(); |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
948 #endif // !PRODUCT |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
949 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
950 // ("Weak") Reference processing support. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
951 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
952 // G1 has 2 instances of the referece processor class. One |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
953 // (_ref_processor_cm) handles reference object discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
954 // and subsequent processing during concurrent marking cycles. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
955 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
956 // The other (_ref_processor_stw) handles reference object |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
957 // discovery and processing during full GCs and incremental |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
958 // evacuation pauses. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
959 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
960 // During an incremental pause, reference discovery will be |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
961 // temporarily disabled for _ref_processor_cm and will be |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
962 // enabled for _ref_processor_stw. At the end of the evacuation |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
963 // pause references discovered by _ref_processor_stw will be |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
964 // processed and discovery will be disabled. The previous |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
965 // setting for reference object discovery for _ref_processor_cm |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
966 // will be re-instated. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
967 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
968 // At the start of marking: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
969 // * Discovery by the CM ref processor is verified to be inactive |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
970 // and it's discovered lists are empty. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
971 // * Discovery by the CM ref processor is then enabled. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
972 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
973 // At the end of marking: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
974 // * Any references on the CM ref processor's discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
975 // lists are processed (possibly MT). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
976 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
977 // At the start of full GC we: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
978 // * Disable discovery by the CM ref processor and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
979 // empty CM ref processor's discovered lists |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
980 // (without processing any entries). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
981 // * Verify that the STW ref processor is inactive and it's |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
982 // discovered lists are empty. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
983 // * Temporarily set STW ref processor discovery as single threaded. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
984 // * Temporarily clear the STW ref processor's _is_alive_non_header |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
985 // field. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
986 // * Finally enable discovery by the STW ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
987 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
988 // The STW ref processor is used to record any discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
989 // references during the full GC. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
990 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
991 // At the end of a full GC we: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
992 // * Enqueue any reference objects discovered by the STW ref processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
993 // that have non-live referents. This has the side-effect of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
994 // making the STW ref processor inactive by disabling discovery. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
995 // * Verify that the CM ref processor is still inactive |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
996 // and no references have been placed on it's discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
997 // lists (also checked as a precondition during initial marking). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
998 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
999 // The (stw) reference processor... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1000 ReferenceProcessor* _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1001 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1002 // During reference object discovery, the _is_alive_non_header |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1003 // closure (if non-null) is applied to the referent object to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1004 // determine whether the referent is live. If so then the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1005 // reference object does not need to be 'discovered' and can |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1006 // 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
|
1007 // the number of 'discovered' reference objects that need to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1008 // be processed. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1009 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1010 // Instance of the is_alive closure for embedding into the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1011 // STW reference processor as the _is_alive_non_header field. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1012 // Supplying a value for the _is_alive_non_header field is |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1013 // optional but doing so prevents unnecessary additions to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1014 // the discovered lists during reference discovery. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1015 G1STWIsAliveClosure _is_alive_closure_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1016 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1017 // The (concurrent marking) reference processor... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1018 ReferenceProcessor* _ref_processor_cm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1019 |
|
2037
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
2030
diff
changeset
|
1020 // Instance of the concurrent mark is_alive closure for embedding |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1021 // into the Concurrent Marking reference processor as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1022 // _is_alive_non_header field. Supplying a value for the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1023 // _is_alive_non_header field is optional but doing so prevents |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1024 // unnecessary additions to the discovered lists during reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1025 // discovery. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1026 G1CMIsAliveClosure _is_alive_closure_cm; |
| 342 | 1027 |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1028 // 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
|
1029 HeapRegion** _worker_cset_start_region; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1030 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1031 // 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
|
1032 // 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
|
1033 // 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
|
1034 // 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
|
1035 // of G1CollectedHeap::_gc_time_stamp. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1036 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
|
1037 |
| 342 | 1038 enum G1H_process_strong_roots_tasks { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
1039 G1H_PS_filter_satb_buffers, |
| 342 | 1040 G1H_PS_refProcessor_oops_do, |
| 1041 // Leave this one last. | |
| 1042 G1H_PS_NumElements | |
| 1043 }; | |
| 1044 | |
| 1045 SubTasksDone* _process_strong_tasks; | |
| 1046 | |
| 2152 | 1047 volatile bool _free_regions_coming; |
| 342 | 1048 |
| 1049 public: | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1718
diff
changeset
|
1050 |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1718
diff
changeset
|
1051 SubTasksDone* process_strong_tasks() { return _process_strong_tasks; } |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1718
diff
changeset
|
1052 |
| 342 | 1053 void set_refine_cte_cl_concurrency(bool concurrent); |
| 1054 | |
| 1709 | 1055 RefToScanQueue *task_queue(int i) const; |
| 342 | 1056 |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
545
diff
changeset
|
1057 // 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
|
1058 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
|
1059 |
| 1705 | 1060 // A DirtyCardQueueSet that is used to hold cards that contain |
| 1061 // references into the current collection set. This is used to | |
| 1062 // update the remembered sets of the regions in the collection | |
| 1063 // set in the event of an evacuation failure. | |
| 1064 DirtyCardQueueSet& into_cset_dirty_card_queue_set() | |
| 1065 { return _into_cset_dirty_card_queue_set; } | |
| 1066 | |
| 342 | 1067 // Create a G1CollectedHeap with the specified policy. |
| 1068 // Must call the initialize method afterwards. | |
| 1069 // May not return if something goes wrong. | |
| 1070 G1CollectedHeap(G1CollectorPolicy* policy); | |
| 1071 | |
| 1072 // Initialize the G1CollectedHeap to have the initial and | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1073 // maximum sizes and remembered and barrier sets |
| 342 | 1074 // specified by the policy object. |
| 1075 jint initialize(); | |
| 1076 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1077 // Initialize weak reference processing. |
|
2037
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
2030
diff
changeset
|
1078 virtual void ref_processing_init(); |
| 342 | 1079 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4709
diff
changeset
|
1080 void set_par_threads(uint t) { |
| 342 | 1081 SharedHeap::set_par_threads(t); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1082 // Done in SharedHeap but oddly there are |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1083 // two _process_strong_tasks's in a G1CollectedHeap |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1084 // so do it here too. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1085 _process_strong_tasks->set_n_threads(t); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1086 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1087 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1088 // Set _n_par_threads according to a policy TBD. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1089 void set_par_threads(); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1090 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1091 void set_n_termination(int t) { |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1718
diff
changeset
|
1092 _process_strong_tasks->set_n_threads(t); |
| 342 | 1093 } |
| 1094 | |
| 1095 virtual CollectedHeap::Name kind() const { | |
| 1096 return CollectedHeap::G1CollectedHeap; | |
| 1097 } | |
| 1098 | |
| 1099 // The current policy object for the collector. | |
| 1100 G1CollectorPolicy* g1_policy() const { return _g1_policy; } | |
| 1101 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1102 virtual CollectorPolicy* collector_policy() const { return (CollectorPolicy*) g1_policy(); } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1103 |
| 342 | 1104 // Adaptive size policy. No such thing for g1. |
| 1105 virtual AdaptiveSizePolicy* size_policy() { return NULL; } | |
| 1106 | |
| 1107 // The rem set and barrier set. | |
| 1108 G1RemSet* g1_rem_set() const { return _g1_rem_set; } | |
| 1109 ModRefBarrierSet* mr_bs() const { return _mr_bs; } | |
| 1110 | |
| 1111 // The rem set iterator. | |
| 1112 HeapRegionRemSetIterator* rem_set_iterator(int i) { | |
| 1113 return _rem_set_iterator[i]; | |
| 1114 } | |
| 1115 | |
| 1116 HeapRegionRemSetIterator* rem_set_iterator() { | |
| 1117 return _rem_set_iterator[0]; | |
| 1118 } | |
| 1119 | |
| 1120 unsigned get_gc_time_stamp() { | |
| 1121 return _gc_time_stamp; | |
| 1122 } | |
| 1123 | |
| 1124 void reset_gc_time_stamp() { | |
| 1125 _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
|
1126 OrderAccess::fence(); |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1127 // 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
|
1128 // 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
|
1129 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
|
1130 } |
|
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
|
1131 |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1132 void check_gc_time_stamps() PRODUCT_RETURN; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1133 |
|
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
|
1134 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
|
1135 ++_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
|
1136 OrderAccess::fence(); |
| 342 | 1137 } |
| 1138 | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1139 // Reset the given region's GC timestamp. If it's starts humongous, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1140 // also reset the GC timestamp of its corresponding |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1141 // continues humongous regions too. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1142 void reset_gc_time_stamps(HeapRegion* hr); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1143 |
| 1705 | 1144 void iterate_dirty_card_closure(CardTableEntryClosure* cl, |
| 1145 DirtyCardQueue* into_cset_dcq, | |
| 1146 bool concurrent, int worker_i); | |
| 342 | 1147 |
| 1148 // The shared block offset table array. | |
| 1149 G1BlockOffsetSharedArray* bot_shared() const { return _bot_shared; } | |
| 1150 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1151 // Reference Processing accessors |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1152 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1153 // The STW reference processor.... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1154 ReferenceProcessor* ref_processor_stw() const { return _ref_processor_stw; } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1155 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1156 // The Concurent Marking reference processor... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1157 ReferenceProcessor* ref_processor_cm() const { return _ref_processor_cm; } |
| 342 | 1158 |
| 1159 virtual size_t capacity() const; | |
| 1160 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
|
1161 // 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
|
1162 // 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
|
1163 size_t used_unlocked() const; |
| 342 | 1164 size_t recalculate_used() const; |
| 1165 | |
| 1166 // These virtual functions do the actual allocation. | |
| 1167 // Some heaps may offer a contiguous region for shared non-blocking | |
| 1168 // allocation, via inlined code (by exporting the address of the top and | |
| 1169 // end fields defining the extent of the contiguous allocation region.) | |
| 1170 // But G1CollectedHeap doesn't yet support this. | |
| 1171 | |
| 1172 // Return an estimate of the maximum allocation that could be performed | |
| 1173 // without triggering any collection or expansion activity. In a | |
| 1174 // generational collector, for example, this is probably the largest | |
| 1175 // allocation that could be supported (without expansion) in the youngest | |
| 1176 // generation. It is "unsafe" because no locks are taken; the result | |
| 1177 // should be treated as an approximation, not a guarantee, for use in | |
| 1178 // heuristic resizing decisions. | |
| 1179 virtual size_t unsafe_max_alloc(); | |
| 1180 | |
| 1181 virtual bool is_maximal_no_gc() const { | |
| 1182 return _g1_storage.uncommitted_size() == 0; | |
| 1183 } | |
| 1184 | |
| 1185 // The total number of regions in the heap. | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1186 uint n_regions() { return _hrs.length(); } |
| 3766 | 1187 |
| 1188 // The max number of regions in the heap. | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1189 uint max_regions() { return _hrs.max_length(); } |
| 342 | 1190 |
| 1191 // The number of regions that are completely free. | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1192 uint free_regions() { return _free_list.length(); } |
| 342 | 1193 |
| 1194 // The number of regions that are not completely free. | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1195 uint used_regions() { return n_regions() - free_regions(); } |
| 342 | 1196 |
| 1197 // The number of regions available for "regular" expansion. | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1198 uint expansion_regions() { return _expansion_regions; } |
| 342 | 1199 |
| 3766 | 1200 // Factory method for HeapRegion instances. It will return NULL if |
| 1201 // the allocation fails. | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1202 HeapRegion* new_heap_region(uint hrs_index, HeapWord* bottom); |
| 3766 | 1203 |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3289
diff
changeset
|
1204 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
|
1205 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
|
1206 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
|
1207 void verify_dirty_young_regions() PRODUCT_RETURN; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1208 |
| 2152 | 1209 // verify_region_sets() performs verification over the region |
| 1210 // lists. It will be compiled in the product code to be used when | |
| 1211 // necessary (i.e., during heap verification). | |
| 1212 void verify_region_sets(); | |
| 342 | 1213 |
| 2152 | 1214 // verify_region_sets_optional() is planted in the code for |
| 1215 // list verification in non-product builds (and it can be enabled in | |
| 1216 // product builds by definning HEAP_REGION_SET_FORCE_VERIFY to be 1). | |
| 1217 #if HEAP_REGION_SET_FORCE_VERIFY | |
| 1218 void verify_region_sets_optional() { | |
| 1219 verify_region_sets(); | |
| 1220 } | |
| 1221 #else // HEAP_REGION_SET_FORCE_VERIFY | |
| 1222 void verify_region_sets_optional() { } | |
| 1223 #endif // HEAP_REGION_SET_FORCE_VERIFY | |
| 342 | 1224 |
| 2152 | 1225 #ifdef ASSERT |
| 2361 | 1226 bool is_on_master_free_list(HeapRegion* hr) { |
| 2152 | 1227 return hr->containing_set() == &_free_list; |
| 1228 } | |
| 342 | 1229 |
| 2361 | 1230 bool is_in_humongous_set(HeapRegion* hr) { |
| 2152 | 1231 return hr->containing_set() == &_humongous_set; |
| 2361 | 1232 } |
| 2152 | 1233 #endif // ASSERT |
| 342 | 1234 |
| 2152 | 1235 // Wrapper for the region list operations that can be called from |
| 1236 // methods outside this class. | |
| 342 | 1237 |
| 2152 | 1238 void secondary_free_list_add_as_tail(FreeRegionList* list) { |
| 1239 _secondary_free_list.add_as_tail(list); | |
| 1240 } | |
| 342 | 1241 |
| 2152 | 1242 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
|
1243 _free_list.add_as_head(&_secondary_free_list); |
| 2152 | 1244 } |
| 342 | 1245 |
| 2361 | 1246 void append_secondary_free_list_if_not_empty_with_lock() { |
| 1247 // If the secondary free list looks empty there's no reason to | |
| 1248 // take the lock and then try to append it. | |
| 2152 | 1249 if (!_secondary_free_list.is_empty()) { |
| 1250 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 1251 append_secondary_free_list(); | |
| 1252 } | |
| 1253 } | |
| 342 | 1254 |
| 4072 | 1255 void old_set_remove(HeapRegion* hr) { |
| 1256 _old_set.remove(hr); | |
| 1257 } | |
| 1258 | |
|
4829
9509c20bba28
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
4787
diff
changeset
|
1259 size_t non_young_capacity_bytes() { |
|
9509c20bba28
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
4787
diff
changeset
|
1260 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
|
1261 } |
|
9509c20bba28
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
4787
diff
changeset
|
1262 |
| 2152 | 1263 void set_free_regions_coming(); |
| 1264 void reset_free_regions_coming(); | |
| 1265 bool free_regions_coming() { return _free_regions_coming; } | |
| 1266 void wait_while_free_regions_coming(); | |
| 342 | 1267 |
|
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
1268 // Determine whether the given region is one that we are using as an |
|
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
1269 // old GC alloc region. |
|
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
1270 bool is_old_gc_alloc_region(HeapRegion* hr) { |
|
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
1271 return hr == _retained_old_gc_alloc_region; |
|
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
1272 } |
|
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
1273 |
| 342 | 1274 // Perform a collection of the heap; intended for use in implementing |
| 1275 // "System.gc". This probably implies as full a collection as the | |
| 1276 // "CollectedHeap" supports. | |
| 1277 virtual void collect(GCCause::Cause cause); | |
| 1278 | |
| 1279 // The same as above but assume that the caller holds the Heap_lock. | |
| 1280 void collect_locked(GCCause::Cause cause); | |
| 1281 | |
| 1282 // True iff a evacuation has failed in the most-recent collection. | |
| 1283 bool evacuation_failed() { return _evacuation_failed; } | |
| 1284 | |
| 2152 | 1285 // It will free a region if it has allocated objects in it that are |
| 1286 // all dead. It calls either free_region() or | |
| 1287 // free_humongous_region() depending on the type of the region that | |
| 1288 // is passed to it. | |
| 2173 | 1289 void free_region_if_empty(HeapRegion* hr, |
| 1290 size_t* pre_used, | |
| 1291 FreeRegionList* free_list, | |
| 4072 | 1292 OldRegionSet* old_proxy_set, |
| 2173 | 1293 HumongousRegionSet* humongous_proxy_set, |
| 1294 HRRSCleanupTask* hrrs_cleanup_task, | |
| 1295 bool par); | |
| 342 | 1296 |
| 2152 | 1297 // It appends the free list to the master free list and updates the |
| 1298 // master humongous list according to the contents of the proxy | |
| 1299 // list. It also adjusts the total used bytes according to pre_used | |
| 1300 // (if par is true, it will do so by taking the ParGCRareEvent_lock). | |
| 1301 void update_sets_after_freeing_regions(size_t pre_used, | |
| 1302 FreeRegionList* free_list, | |
| 4072 | 1303 OldRegionSet* old_proxy_set, |
| 2152 | 1304 HumongousRegionSet* humongous_proxy_set, |
| 1305 bool par); | |
| 342 | 1306 |
| 4708 | 1307 // Returns "TRUE" iff "p" points into the committed areas of the heap. |
| 342 | 1308 virtual bool is_in(const void* p) const; |
| 1309 | |
| 1310 // Return "TRUE" iff the given object address is within the collection | |
| 1311 // set. | |
| 1312 inline bool obj_in_cs(oop obj); | |
| 1313 | |
| 1314 // Return "TRUE" iff the given object address is in the reserved | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1315 // region of g1. |
| 342 | 1316 bool is_in_g1_reserved(const void* p) const { |
| 1317 return _g1_reserved.contains(p); | |
| 1318 } | |
| 1319 | |
|
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2433
diff
changeset
|
1320 // 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
|
1321 // 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
|
1322 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
|
1323 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
|
1324 } |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2433
diff
changeset
|
1325 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2433
diff
changeset
|
1326 // Returns a MemRegion that corresponds to the space that has been |
| 342 | 1327 // committed in the heap |
| 1328 MemRegion g1_committed() { | |
| 1329 return _g1_committed; | |
| 1330 } | |
| 1331 | |
| 2311 | 1332 virtual bool is_in_closed_subset(const void* p) const; |
| 342 | 1333 |
| 1334 // This resets the card table to all zeros. It is used after | |
| 1335 // a collection pause which used the card table to claim cards. | |
| 1336 void cleanUpCardTable(); | |
| 1337 | |
| 1338 // Iteration functions. | |
| 1339 | |
| 1340 // Iterate over all the ref-containing fields of all objects, calling | |
| 1341 // "cl.do_oop" on each. | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1342 virtual void oop_iterate(ExtendedOopClosure* cl); |
| 342 | 1343 |
| 1344 // Same as above, restricted to a memory region. | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1345 void oop_iterate(MemRegion mr, ExtendedOopClosure* cl); |
| 342 | 1346 |
| 1347 // Iterate over all objects, calling "cl.do_object" on each. | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1348 virtual void object_iterate(ObjectClosure* cl); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1349 |
| 678 | 1350 virtual void safe_object_iterate(ObjectClosure* cl) { |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1351 object_iterate(cl); |
| 678 | 1352 } |
| 342 | 1353 |
| 1354 // Iterate over all objects allocated since the last collection, calling | |
| 1355 // "cl.do_object" on each. The heap must have been initialized properly | |
| 1356 // to support this function, or else this call will fail. | |
| 1357 virtual void object_iterate_since_last_GC(ObjectClosure* cl); | |
| 1358 | |
| 1359 // Iterate over all spaces in use in the heap, in ascending address order. | |
| 1360 virtual void space_iterate(SpaceClosure* cl); | |
| 1361 | |
| 1362 // Iterate over heap regions, in address order, terminating the | |
| 1363 // iteration early if the "doHeapRegion" method returns "true". | |
| 3766 | 1364 void heap_region_iterate(HeapRegionClosure* blk) const; |
| 342 | 1365 |
| 3766 | 1366 // Return the region with the given index. It assumes the index is valid. |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1367 HeapRegion* region_at(uint index) const { return _hrs.at(index); } |
| 342 | 1368 |
| 1369 // Divide the heap region sequence into "chunks" of some size (the number | |
| 1370 // of regions divided by the number of parallel threads times some | |
| 1371 // overpartition factor, currently 4). Assumes that this will be called | |
| 1372 // in parallel by ParallelGCThreads worker threads with discinct worker | |
| 1373 // ids in the range [0..max(ParallelGCThreads-1, 1)], that all parallel | |
| 1374 // calls will use the same "claim_value", and that that claim value is | |
| 1375 // different from the claim_value of any heap region before the start of | |
| 1376 // the iteration. Applies "blk->doHeapRegion" to each of the regions, by | |
| 1377 // attempting to claim the first region in each chunk, and, if | |
| 1378 // successful, applying the closure to each region in the chunk (and | |
| 1379 // setting the claim value of the second and subsequent regions of the | |
| 1380 // chunk.) For now requires that "doHeapRegion" always returns "false", | |
| 1381 // i.e., that a closure never attempt to abort a traversal. | |
| 1382 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
|
1383 uint worker, |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4709
diff
changeset
|
1384 uint no_of_par_workers, |
| 342 | 1385 jint claim_value); |
| 1386 | |
| 390 | 1387 // It resets all the region claim values to the default. |
| 1388 void reset_heap_region_claim_values(); | |
| 1389 | |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
1390 // 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
|
1391 // collection set to the default. |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
1392 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
|
1393 |
| 355 | 1394 #ifdef ASSERT |
| 1395 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
|
1396 |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
1397 // 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
|
1398 // current collection set. |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
1399 bool check_cset_heap_region_claim_values(jint claim_value); |
| 355 | 1400 #endif // ASSERT |
| 1401 | |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1402 // 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
|
1403 // 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
|
1404 void clear_cset_start_regions(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1405 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1406 // 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
|
1407 // 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
|
1408 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
|
1409 |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1410 // This is a convenience method that is used by the |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1411 // HeapRegionIterator classes to calculate the starting region for |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1412 // each worker so that they do not all start from the same region. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1413 HeapRegion* start_region_for_worker(uint worker_i, uint no_of_par_workers); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1414 |
| 342 | 1415 // Iterate over the regions (if any) in the current collection set. |
| 1416 void collection_set_iterate(HeapRegionClosure* blk); | |
| 1417 | |
| 1418 // As above but starting from region r | |
| 1419 void collection_set_iterate_from(HeapRegion* r, HeapRegionClosure *blk); | |
| 1420 | |
| 1421 // Returns the first (lowest address) compactible space in the heap. | |
| 1422 virtual CompactibleSpace* first_compactible_space(); | |
| 1423 | |
| 1424 // A CollectedHeap will contain some number of spaces. This finds the | |
| 1425 // space containing a given address, or else returns NULL. | |
| 1426 virtual Space* space_containing(const void* addr) const; | |
| 1427 | |
| 1428 // A G1CollectedHeap will contain some number of heap regions. This | |
| 1429 // finds the region containing a given address, or else returns NULL. | |
| 3766 | 1430 template <class T> |
| 1431 inline HeapRegion* heap_region_containing(const T addr) const; | |
| 342 | 1432 |
| 1433 // Like the above, but requires "addr" to be in the heap (to avoid a | |
| 1434 // null-check), and unlike the above, may return an continuing humongous | |
| 1435 // region. | |
| 3766 | 1436 template <class T> |
| 1437 inline HeapRegion* heap_region_containing_raw(const T addr) const; | |
| 342 | 1438 |
| 1439 // A CollectedHeap is divided into a dense sequence of "blocks"; that is, | |
| 1440 // each address in the (reserved) heap is a member of exactly | |
| 1441 // one block. The defining characteristic of a block is that it is | |
| 1442 // possible to find its size, and thus to progress forward to the next | |
| 1443 // block. (Blocks may be of different sizes.) Thus, blocks may | |
| 1444 // represent Java objects, or they might be free blocks in a | |
| 1445 // free-list-based heap (or subheap), as long as the two kinds are | |
| 1446 // distinguishable and the size of each is determinable. | |
| 1447 | |
| 1448 // Returns the address of the start of the "block" that contains the | |
| 1449 // address "addr". We say "blocks" instead of "object" since some heaps | |
| 1450 // may not pack objects densely; a chunk may either be an object or a | |
| 1451 // non-object. | |
| 1452 virtual HeapWord* block_start(const void* addr) const; | |
| 1453 | |
| 1454 // Requires "addr" to be the start of a chunk, and returns its size. | |
| 1455 // "addr + size" is required to be the start of a new chunk, or the end | |
| 1456 // of the active area of the heap. | |
| 1457 virtual size_t block_size(const HeapWord* addr) const; | |
| 1458 | |
| 1459 // Requires "addr" to be the start of a block, and returns "TRUE" iff | |
| 1460 // the block is an object. | |
| 1461 virtual bool block_is_obj(const HeapWord* addr) const; | |
| 1462 | |
| 1463 // Does this heap support heap inspection? (+PrintClassHistogram) | |
| 1464 virtual bool supports_heap_inspection() const { return true; } | |
| 1465 | |
| 1466 // Section on thread-local allocation buffers (TLABs) | |
| 1467 // See CollectedHeap for semantics. | |
| 1468 | |
| 1469 virtual bool supports_tlab_allocation() const; | |
| 1470 virtual size_t tlab_capacity(Thread* thr) const; | |
| 1471 virtual size_t unsafe_max_tlab_alloc(Thread* thr) const; | |
| 1472 | |
| 1473 // Can a compiler initialize a new object without store barriers? | |
| 1474 // 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
|
1475 // 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
|
1476 // 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
|
1477 // 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
|
1478 // 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
|
1479 // 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
|
1480 // 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
|
1481 // 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
|
1482 // 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
|
1483 // 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
|
1484 // 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
|
1485 // See ReduceInitialCardMarks. |
| 342 | 1486 virtual bool can_elide_tlab_store_barriers() const { |
|
3988
246daf2c601d
7005808: G1: re-enable ReduceInitialCardMarks for G1
brutisso
parents:
3980
diff
changeset
|
1487 return true; |
|
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
942
diff
changeset
|
1488 } |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
942
diff
changeset
|
1489 |
| 1166 | 1490 virtual bool card_mark_must_follow_store() const { |
| 1491 return true; | |
| 1492 } | |
| 1493 | |
| 3766 | 1494 bool is_in_young(const oop obj) { |
|
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
942
diff
changeset
|
1495 HeapRegion* hr = heap_region_containing(obj); |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
942
diff
changeset
|
1496 return hr != NULL && hr->is_young(); |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
942
diff
changeset
|
1497 } |
|
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
942
diff
changeset
|
1498 |
|
3377
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3317
diff
changeset
|
1499 #ifdef ASSERT |
|
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3317
diff
changeset
|
1500 virtual bool is_in_partial_collection(const void* p); |
|
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3317
diff
changeset
|
1501 #endif |
|
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3317
diff
changeset
|
1502 |
|
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3317
diff
changeset
|
1503 virtual bool is_scavengable(const void* addr); |
|
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3317
diff
changeset
|
1504 |
|
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
942
diff
changeset
|
1505 // 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
|
1506 // 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
|
1507 // 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
|
1508 // 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
|
1509 // information for young gen objects. |
|
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
942
diff
changeset
|
1510 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
|
1511 return is_in_young(new_obj); |
| 342 | 1512 } |
| 1513 | |
| 1514 // Returns "true" iff the given word_size is "very large". | |
| 1515 static bool isHumongous(size_t word_size) { | |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1311
diff
changeset
|
1516 // 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
|
1517 // 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
|
1518 // 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
|
1519 // humongous and that we don't allocate a humongous |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1311
diff
changeset
|
1520 // object in a TLAB. |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1311
diff
changeset
|
1521 return word_size > _humongous_object_threshold_in_words; |
| 342 | 1522 } |
| 1523 | |
| 1524 // Update mod union table with the set of dirty cards. | |
| 1525 void updateModUnion(); | |
| 1526 | |
| 1527 // Set the mod union bits corresponding to the given memRegion. Note | |
| 1528 // that this is always a safe operation, since it doesn't clear any | |
| 1529 // bits. | |
| 1530 void markModUnionRange(MemRegion mr); | |
| 1531 | |
| 1532 // Records the fact that a marking phase is no longer in progress. | |
| 1533 void set_marking_complete() { | |
| 1534 _mark_in_progress = false; | |
| 1535 } | |
| 1536 void set_marking_started() { | |
| 1537 _mark_in_progress = true; | |
| 1538 } | |
| 1539 bool mark_in_progress() { | |
| 1540 return _mark_in_progress; | |
| 1541 } | |
| 1542 | |
| 1543 // Print the maximum heap capacity. | |
| 1544 virtual size_t max_capacity() const; | |
| 1545 | |
| 1546 virtual jlong millis_since_last_gc(); | |
| 1547 | |
| 1548 // Perform any cleanup actions necessary before allowing a verification. | |
| 1549 virtual void prepare_for_verify(); | |
| 1550 | |
| 1551 // Perform verification. | |
| 811 | 1552 |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1553 // vo == UsePrevMarking -> use "prev" marking information, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1554 // vo == UseNextMarking -> use "next" marking information |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1555 // vo == UseMarkWord -> use the mark word in the object header |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1556 // |
| 811 | 1557 // NOTE: Only the "prev" marking information is guaranteed to be |
| 1558 // 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
|
1559 // vo == UsePrevMarking. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1560 // 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
|
1561 // vo == UseNextMarking, which is to verify the "next" marking |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1562 // information at the end of remark. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1563 // 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
|
1564 // vo == UseMarkWord, which is to verify the marking during a |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1565 // full GC. |
| 6008 | 1566 void verify(bool silent, VerifyOption vo); |
| 811 | 1567 |
| 1568 // Override; it uses the "prev" marking information | |
| 6008 | 1569 virtual void verify(bool silent); |
| 342 | 1570 virtual void print_on(outputStream* st) const; |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
1571 virtual void print_extended_on(outputStream* st) const; |
| 342 | 1572 |
| 1573 virtual void print_gc_threads_on(outputStream* st) const; | |
| 1574 virtual void gc_threads_do(ThreadClosure* tc) const; | |
| 1575 | |
| 1576 // Override | |
| 1577 void print_tracing_info() const; | |
| 1578 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
1579 // 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
|
1580 void print_cset_rsets() PRODUCT_RETURN; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
1581 void print_all_rsets() PRODUCT_RETURN; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
1582 |
| 342 | 1583 // Convenience function to be used in situations where the heap type can be |
| 1584 // asserted to be this type. | |
| 1585 static G1CollectedHeap* heap(); | |
| 1586 | |
| 1587 void set_region_short_lived_locked(HeapRegion* hr); | |
| 1588 // add appropriate methods for any other surv rate groups | |
| 1589 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1590 YoungList* young_list() { return _young_list; } |
| 342 | 1591 |
| 1592 // debugging | |
| 1593 bool check_young_list_well_formed() { | |
| 1594 return _young_list->check_list_well_formed(); | |
| 1595 } | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1596 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1597 bool check_young_list_empty(bool check_heap, |
| 342 | 1598 bool check_sample = true); |
| 1599 | |
| 1600 // *** Stuff related to concurrent marking. It's not clear to me that so | |
| 1601 // many of these need to be public. | |
| 1602 | |
| 1603 // The functions below are helper functions that a subclass of | |
| 1604 // "CollectedHeap" can use in the implementation of its virtual | |
| 1605 // functions. | |
| 1606 // This performs a concurrent marking of the live objects in a | |
| 1607 // bitmap off to the side. | |
| 1608 void doConcurrentMark(); | |
| 1609 | |
| 1610 bool isMarkedPrev(oop obj) const; | |
| 1611 bool isMarkedNext(oop obj) const; | |
| 1612 | |
| 1613 // Determine if an object is dead, given the object and also | |
| 1614 // the region to which the object belongs. An object is dead | |
| 1615 // iff a) it was not allocated since the last mark and b) it | |
| 1616 // is not marked. | |
| 1617 | |
| 1618 bool is_obj_dead(const oop obj, const HeapRegion* hr) const { | |
| 1619 return | |
| 1620 !hr->obj_allocated_since_prev_marking(obj) && | |
| 1621 !isMarkedPrev(obj); | |
| 1622 } | |
| 1623 | |
| 1624 // This function returns true when an object has been | |
| 1625 // around since the previous marking and hasn't yet | |
| 1626 // been marked during this marking. | |
| 1627 | |
| 1628 bool is_obj_ill(const oop obj, const HeapRegion* hr) const { | |
| 1629 return | |
| 1630 !hr->obj_allocated_since_next_marking(obj) && | |
| 1631 !isMarkedNext(obj); | |
| 1632 } | |
| 1633 | |
| 1634 // Determine if an object is dead, given only the object itself. | |
| 1635 // This will find the region to which the object belongs and | |
| 1636 // then call the region version of the same function. | |
| 1637 | |
| 1638 // Added if it is NULL it isn't dead. | |
| 1639 | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1640 bool is_obj_dead(const oop obj) const { |
| 811 | 1641 const HeapRegion* hr = heap_region_containing(obj); |
| 342 | 1642 if (hr == NULL) { |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1643 if (obj == NULL) return false; |
| 342 | 1644 else return true; |
| 1645 } | |
| 1646 else return is_obj_dead(obj, hr); | |
| 1647 } | |
| 1648 | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1649 bool is_obj_ill(const oop obj) const { |
| 811 | 1650 const HeapRegion* hr = heap_region_containing(obj); |
| 342 | 1651 if (hr == NULL) { |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1652 if (obj == NULL) return false; |
| 342 | 1653 else return true; |
| 1654 } | |
| 1655 else return is_obj_ill(obj, hr); | |
| 1656 } | |
| 1657 | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1658 // The methods below are here for convenience and dispatch the |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1659 // appropriate method depending on value of the given VerifyOption |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1660 // parameter. The options for that parameter are: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1661 // |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1662 // vo == UsePrevMarking -> use "prev" marking information, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1663 // vo == UseNextMarking -> use "next" marking information, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1664 // vo == UseMarkWord -> use mark word from object header |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1665 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1666 bool is_obj_dead_cond(const oop obj, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1667 const HeapRegion* hr, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1668 const VerifyOption vo) const { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1669 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1670 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1671 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1672 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1673 default: ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1674 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1675 return false; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1676 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1677 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1678 bool is_obj_dead_cond(const oop obj, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1679 const VerifyOption vo) const { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1680 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1681 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1682 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1683 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1684 default: ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1685 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1686 return false; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1687 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1688 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1689 bool allocated_since_marking(oop obj, HeapRegion* hr, VerifyOption vo); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1690 HeapWord* top_at_mark_start(HeapRegion* hr, VerifyOption vo); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1691 bool is_marked(oop obj, VerifyOption vo); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1692 const char* top_at_mark_start_str(VerifyOption vo); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1693 |
| 342 | 1694 // The following is just to alert the verification code |
| 1695 // that a full collection has occurred and that the | |
| 1696 // remembered sets are no longer up to date. | |
| 1697 bool _full_collection; | |
| 1698 void set_full_collection() { _full_collection = true;} | |
| 1699 void clear_full_collection() {_full_collection = false;} | |
| 1700 bool full_collection() {return _full_collection;} | |
| 1701 | |
| 1702 ConcurrentMark* concurrent_mark() const { return _cm; } | |
| 1703 ConcurrentG1Refine* concurrent_g1_refine() const { return _cg1r; } | |
| 1704 | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
678
diff
changeset
|
1705 // 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
|
1706 // 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
|
1707 // remembered set scanning and drained during the card table |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
678
diff
changeset
|
1708 // cleanup. Although the methods are reentrant, population/draining |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
678
diff
changeset
|
1709 // phases must not overlap. For synchronization purposes the last |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
678
diff
changeset
|
1710 // element on the list points to itself. |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
678
diff
changeset
|
1711 HeapRegion* _dirty_cards_region_list; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
678
diff
changeset
|
1712 void push_dirty_cards_region(HeapRegion* hr); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
678
diff
changeset
|
1713 HeapRegion* pop_dirty_cards_region(); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
678
diff
changeset
|
1714 |
| 342 | 1715 public: |
| 1716 void stop_conc_gc_threads(); | |
| 1717 | |
| 1718 size_t pending_card_num(); | |
| 1719 size_t cards_scanned(); | |
| 1720 | |
| 1721 protected: | |
| 1722 size_t _max_heap_capacity; | |
| 1723 }; | |
| 1724 | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1725 class G1ParGCAllocBuffer: public ParGCAllocBuffer { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1726 private: |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1727 bool _retired; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1728 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1729 public: |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3867
diff
changeset
|
1730 G1ParGCAllocBuffer(size_t gclab_word_size); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1731 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
1732 void set_buf(HeapWord* buf) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1733 ParGCAllocBuffer::set_buf(buf); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1734 _retired = false; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1735 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1736 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
1737 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
|
1738 if (_retired) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1739 return; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1740 ParGCAllocBuffer::retire(end_of_gc, retain); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1741 _retired = true; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1742 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1743 }; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1744 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1745 class G1ParScanThreadState : public StackObj { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1746 protected: |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1747 G1CollectedHeap* _g1h; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1748 RefToScanQueue* _refs; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1749 DirtyCardQueue _dcq; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1750 CardTableModRefBS* _ct_bs; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1751 G1RemSet* _g1_rem; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1752 |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
1753 G1ParGCAllocBuffer _surviving_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
1754 G1ParGCAllocBuffer _tenured_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
1755 G1ParGCAllocBuffer* _alloc_buffers[GCAllocPurposeCount]; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
1756 ageTable _age_table; |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1757 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1758 size_t _alloc_buffer_waste; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1759 size_t _undo_waste; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1760 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1761 OopsInHeapRegionClosure* _evac_failure_cl; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1762 G1ParScanHeapEvacClosure* _evac_cl; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1763 G1ParScanPartialArrayClosure* _partial_scan_cl; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1764 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1765 int _hash_seed; |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4829
diff
changeset
|
1766 uint _queue_num; |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1767 |
| 1611 | 1768 size_t _term_attempts; |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1769 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1770 double _start; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1771 double _start_strong_roots; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1772 double _strong_roots_time; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1773 double _start_term; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1774 double _term_time; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1775 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1776 // 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
|
1777 // 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
|
1778 size_t* _surviving_young_words_base; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1779 // 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
|
1780 size_t* _surviving_young_words; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1781 |
| 1709 | 1782 #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
|
1783 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1784 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
|
1785 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1786 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
|
1787 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1788 DirtyCardQueue& dirty_card_queue() { return _dcq; } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1789 CardTableModRefBS* ctbs() { return _ct_bs; } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1790 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1791 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
|
1792 if (!from->is_survivor()) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1793 _g1_rem->par_write_ref(from, p, tid); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1794 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1795 } |
|
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 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
|
1798 // 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
|
1799 // 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
|
1800 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
|
1801 size_t card_index = ctbs()->index_for(p); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1802 // 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
|
1803 if (ctbs()->mark_card_deferred(card_index)) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1804 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
|
1805 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1806 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1807 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1808 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1809 public: |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4829
diff
changeset
|
1810 G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num); |
|
845
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 ~G1ParScanThreadState() { |
| 6197 | 1813 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words_base, mtGC); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1814 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1815 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1816 RefToScanQueue* refs() { return _refs; } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1817 ageTable* age_table() { return &_age_table; } |
|
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 G1ParGCAllocBuffer* alloc_buffer(GCAllocPurpose purpose) { |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
1820 return _alloc_buffers[purpose]; |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1821 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1822 |
| 1709 | 1823 size_t alloc_buffer_waste() const { return _alloc_buffer_waste; } |
| 1824 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
|
1825 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1826 #ifdef ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1827 bool verify_ref(narrowOop* ref) const; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1828 bool verify_ref(oop* ref) const; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1829 bool verify_task(StarTask ref) const; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1830 #endif // ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1831 |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1832 template <class T> void push_on_queue(T* ref) { |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1833 assert(verify_ref(ref), "sanity"); |
| 1709 | 1834 refs()->push(ref); |
|
845
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 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1837 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
|
1838 if (G1DeferredRSUpdate) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1839 deferred_rs_update(from, p, tid); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1840 } else { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1841 immediate_rs_update(from, p, tid); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1842 } |
|
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 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1845 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
|
1846 HeapWord* obj = NULL; |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
1847 size_t gclab_word_size = _g1h->desired_plab_sz(purpose); |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
1848 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
|
1849 G1ParGCAllocBuffer* alloc_buf = alloc_buffer(purpose); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1850 add_to_alloc_buffer_waste(alloc_buf->words_remaining()); |
| 6595 | 1851 alloc_buf->flush_stats_and_retire(_g1h->stats_for_purpose(purpose), |
| 1852 false /* end_of_gc */, | |
| 1853 false /* retain */); | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1854 |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
1855 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
|
1856 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
|
1857 // Otherwise. |
| 6595 | 1858 alloc_buf->set_word_size(gclab_word_size); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1859 alloc_buf->set_buf(buf); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1860 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1861 obj = alloc_buf->allocate(word_sz); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1862 assert(obj != NULL, "buffer was definitely big enough..."); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1863 } else { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1864 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
|
1865 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1866 return obj; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1867 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1868 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1869 HeapWord* allocate(GCAllocPurpose purpose, size_t word_sz) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1870 HeapWord* obj = alloc_buffer(purpose)->allocate(word_sz); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1871 if (obj != NULL) return obj; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1872 return allocate_slow(purpose, word_sz); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1873 } |
|
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 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
|
1876 if (alloc_buffer(purpose)->contains(obj)) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1877 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
|
1878 "should contain whole object"); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1879 alloc_buffer(purpose)->undo_allocation(obj, word_sz); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1880 } else { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1881 CollectedHeap::fill_with_object(obj, word_sz); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1882 add_to_undo_waste(word_sz); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1883 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1884 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1885 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1886 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
|
1887 _evac_failure_cl = evac_failure_cl; |
|
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 OopsInHeapRegionClosure* evac_failure_closure() { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1890 return _evac_failure_cl; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1891 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1892 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1893 void set_evac_closure(G1ParScanHeapEvacClosure* evac_cl) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1894 _evac_cl = evac_cl; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1895 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1896 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1897 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
|
1898 _partial_scan_cl = partial_scan_cl; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1899 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1900 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1901 int* hash_seed() { return &_hash_seed; } |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4829
diff
changeset
|
1902 uint queue_num() { return _queue_num; } |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1903 |
| 1709 | 1904 size_t term_attempts() const { return _term_attempts; } |
| 1611 | 1905 void note_term_attempt() { _term_attempts++; } |
|
845
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 void start_strong_roots() { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1908 _start_strong_roots = os::elapsedTime(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1909 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1910 void end_strong_roots() { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1911 _strong_roots_time += (os::elapsedTime() - _start_strong_roots); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1912 } |
| 1709 | 1913 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
|
1914 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1915 void start_term_time() { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1916 note_term_attempt(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1917 _start_term = os::elapsedTime(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1918 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1919 void end_term_time() { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1920 _term_time += (os::elapsedTime() - _start_term); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1921 } |
| 1709 | 1922 double term_time() const { return _term_time; } |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1923 |
| 1709 | 1924 double elapsed_time() const { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1925 return os::elapsedTime() - _start; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1926 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1927 |
| 1709 | 1928 static void |
| 1929 print_termination_stats_hdr(outputStream* const st = gclog_or_tty); | |
| 1930 void | |
| 1931 print_termination_stats(int i, outputStream* const st = gclog_or_tty) const; | |
| 1932 | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1933 size_t* surviving_young_words() { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1934 // 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
|
1935 // age -1 regions (i.e. non-young ones) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1936 return _surviving_young_words; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1937 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1938 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1939 void retire_alloc_buffers() { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1940 for (int ap = 0; ap < GCAllocPurposeCount; ++ap) { |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
1941 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
|
1942 add_to_alloc_buffer_waste(waste); |
| 6595 | 1943 _alloc_buffers[ap]->flush_stats_and_retire(_g1h->stats_for_purpose((GCAllocPurpose)ap), |
| 1944 true /* end_of_gc */, | |
| 1945 false /* retain */); | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1946 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1947 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1948 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1949 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
|
1950 if (has_partial_array_mask(ref_to_scan)) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1951 _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
|
1952 } else { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1953 // 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
|
1954 // "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
|
1955 // humongous region. |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1956 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
|
1957 _evac_cl->set_region(r); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1958 _evac_cl->do_oop_nv(ref_to_scan); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1959 } |
|
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 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1962 void deal_with_reference(StarTask ref) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1963 assert(verify_task(ref), "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1964 if (ref.is_narrow()) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1965 deal_with_reference((narrowOop*)ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1966 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1967 deal_with_reference((oop*)ref); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1968 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1969 } |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1970 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1971 public: |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1972 void trim_queue(); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1973 }; |
| 1972 | 1974 |
| 1975 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_HPP |