Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp @ 11338:87cab8081da4
removed dead code for HotSpotInstalledCode in CodeInstaller::site_Call
author | twisti |
---|---|
date | Fri, 16 Aug 2013 17:22:34 -0700 |
parents | 6b0fd0964b87 |
children | cefad50507d8 |
rev | line source |
---|---|
342 | 1 /* |
10405 | 2 * Copyright (c) 2001, 2013, 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" | |
10405 | 29 #include "gc_implementation/g1/evacuationInfo.hpp" |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
30 #include "gc_implementation/g1/g1AllocRegion.hpp" |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
31 #include "gc_implementation/g1/g1HRPrinter.hpp" |
10405 | 32 #include "gc_implementation/g1/g1MonitoringSupport.hpp" |
1972 | 33 #include "gc_implementation/g1/g1RemSet.hpp" |
10405 | 34 #include "gc_implementation/g1/g1YCTypes.hpp" |
3766 | 35 #include "gc_implementation/g1/heapRegionSeq.hpp" |
2152 | 36 #include "gc_implementation/g1/heapRegionSets.hpp" |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
37 #include "gc_implementation/shared/hSpaceCounters.hpp" |
6595 | 38 #include "gc_implementation/shared/parGCAllocBuffer.hpp" |
1972 | 39 #include "memory/barrierSet.hpp" |
40 #include "memory/memRegion.hpp" | |
41 #include "memory/sharedHeap.hpp" | |
8038
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
6819
diff
changeset
|
42 #include "utilities/stack.hpp" |
1972 | 43 |
342 | 44 // A "G1CollectedHeap" is an implementation of a java heap for HotSpot. |
45 // It uses the "Garbage First" heap organization and algorithm, which | |
46 // may combine concurrent marking with parallel, incremental compaction of | |
47 // heap subsets that will yield large amounts of garbage. | |
48 | |
49 class HeapRegion; | |
2173 | 50 class HRRSCleanupTask; |
342 | 51 class GenerationSpec; |
52 class OopsInHeapRegionClosure; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
53 class G1KlassScanClosure; |
342 | 54 class G1ScanHeapEvacClosure; |
55 class ObjectClosure; | |
56 class SpaceClosure; | |
57 class CompactibleSpaceClosure; | |
58 class Space; | |
59 class G1CollectorPolicy; | |
60 class GenRemSet; | |
61 class G1RemSet; | |
62 class HeapRegionRemSetIterator; | |
63 class ConcurrentMark; | |
64 class ConcurrentMarkThread; | |
65 class ConcurrentG1Refine; | |
10405 | 66 class ConcurrentGCTimer; |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
67 class GenerationCounters; |
10405 | 68 class STWGCTimer; |
69 class G1NewTracer; | |
70 class G1OldTracer; | |
71 class EvacuationFailedInfo; | |
342 | 72 |
6197 | 73 typedef OverflowTaskQueue<StarTask, mtGC> RefToScanQueue; |
74 typedef GenericTaskQueueSet<RefToScanQueue, mtGC> RefToScanQueueSet; | |
342 | 75 |
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
76 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
|
77 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
|
78 |
342 | 79 enum GCAllocPurpose { |
80 GCAllocForTenured, | |
81 GCAllocForSurvived, | |
82 GCAllocPurposeCount | |
83 }; | |
84 | |
6197 | 85 class YoungList : public CHeapObj<mtGC> { |
342 | 86 private: |
87 G1CollectedHeap* _g1h; | |
88 | |
89 HeapRegion* _head; | |
90 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
91 HeapRegion* _survivor_head; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
92 HeapRegion* _survivor_tail; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
93 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
94 HeapRegion* _curr; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
95 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
96 uint _length; |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
97 uint _survivor_length; |
342 | 98 |
99 size_t _last_sampled_rs_lengths; | |
100 size_t _sampled_rs_lengths; | |
101 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
102 void empty_list(HeapRegion* list); |
342 | 103 |
104 public: | |
105 YoungList(G1CollectedHeap* g1h); | |
106 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
107 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
|
108 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
|
109 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
110 void empty_list(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
111 bool is_empty() { return _length == 0; } |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
112 uint length() { return _length; } |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
113 uint survivor_length() { return _survivor_length; } |
342 | 114 |
3764
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
3377
diff
changeset
|
115 // 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
|
116 // 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
|
117 // 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
|
118 // 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
|
119 // 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
|
120 size_t eden_used_bytes() { |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
3377
diff
changeset
|
121 assert(length() >= survivor_length(), "invariant"); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
122 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
|
123 } |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
3377
diff
changeset
|
124 size_t survivor_used_bytes() { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
125 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
|
126 } |
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
3377
diff
changeset
|
127 |
342 | 128 void rs_length_sampling_init(); |
129 bool rs_length_sampling_more(); | |
130 void rs_length_sampling_next(); | |
131 | |
132 void reset_sampled_info() { | |
133 _last_sampled_rs_lengths = 0; | |
134 } | |
135 size_t sampled_rs_lengths() { return _last_sampled_rs_lengths; } | |
136 | |
137 // for development purposes | |
138 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
|
139 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
|
140 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
141 void clear_survivors() { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
142 _survivor_head = NULL; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
143 _survivor_tail = NULL; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
144 _survivor_length = 0; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
145 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
146 |
342 | 147 HeapRegion* first_region() { return _head; } |
148 HeapRegion* first_survivor_region() { return _survivor_head; } | |
545 | 149 HeapRegion* last_survivor_region() { return _survivor_tail; } |
342 | 150 |
151 // debugging | |
152 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
|
153 bool check_list_empty(bool check_sample = true); |
342 | 154 void print(); |
155 }; | |
156 | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
157 class MutatorAllocRegion : public G1AllocRegion { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
158 protected: |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
159 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
|
160 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
|
161 public: |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
162 MutatorAllocRegion() |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
163 : G1AllocRegion("Mutator Alloc Region", false /* bot_updates */) { } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
164 }; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
165 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
166 // The G1 STW is alive closure. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
167 // An instance is embedded into the G1CH and used as the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
168 // (optional) _is_alive_non_header closure in the STW |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
169 // reference processor. It is also extensively used during |
10405 | 170 // reference processing during STW evacuation pauses. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
171 class G1STWIsAliveClosure: public BoolObjectClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
172 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
173 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
174 G1STWIsAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
175 bool do_object_b(oop p); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
176 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
177 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
178 class SurvivorGCAllocRegion : public G1AllocRegion { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
179 protected: |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
180 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
|
181 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
|
182 public: |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
183 SurvivorGCAllocRegion() |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
184 : 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
|
185 }; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
186 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
187 class OldGCAllocRegion : public G1AllocRegion { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
188 protected: |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
189 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
|
190 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
|
191 public: |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
192 OldGCAllocRegion() |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
193 : 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
|
194 }; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
195 |
342 | 196 class RefineCardTableEntryClosure; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
197 |
342 | 198 class G1CollectedHeap : public SharedHeap { |
199 friend class VM_G1CollectForAllocation; | |
200 friend class VM_G1CollectFull; | |
201 friend class VM_G1IncCollectionPause; | |
202 friend class VMStructs; | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
203 friend class MutatorAllocRegion; |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
204 friend class SurvivorGCAllocRegion; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
205 friend class OldGCAllocRegion; |
342 | 206 |
207 // Closures used in implementation. | |
5987 | 208 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
209 friend class G1ParCopyClosure; | |
342 | 210 friend class G1IsAliveClosure; |
211 friend class G1EvacuateFollowersClosure; | |
212 friend class G1ParScanThreadState; | |
213 friend class G1ParScanClosureSuper; | |
214 friend class G1ParEvacuateFollowersClosure; | |
215 friend class G1ParTask; | |
216 friend class G1FreeGarbageRegionClosure; | |
217 friend class RefineCardTableEntryClosure; | |
218 friend class G1PrepareCompactClosure; | |
219 friend class RegionSorter; | |
2152 | 220 friend class RegionResetter; |
342 | 221 friend class CountRCClosure; |
222 friend class EvacPopObjClosure; | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
678
diff
changeset
|
223 friend class G1ParCleanupCTTask; |
342 | 224 |
225 // Other related classes. | |
226 friend class G1MarkSweep; | |
227 | |
228 private: | |
229 // The one and only G1CollectedHeap, so static functions can find it. | |
230 static G1CollectedHeap* _g1h; | |
231 | |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
232 static size_t _humongous_object_threshold_in_words; |
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
233 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
234 // Storage for the G1 heap. |
342 | 235 VirtualSpace _g1_storage; |
236 MemRegion _g1_reserved; | |
237 | |
238 // The part of _g1_storage that is currently committed. | |
239 MemRegion _g1_committed; | |
240 | |
2152 | 241 // The master free list. It will satisfy all new region allocations. |
242 MasterFreeRegionList _free_list; | |
243 | |
244 // The secondary free list which contains regions that have been | |
245 // freed up during the cleanup process. This will be appended to the | |
246 // master free list when appropriate. | |
247 SecondaryFreeRegionList _secondary_free_list; | |
248 | |
4072 | 249 // It keeps track of the old regions. |
250 MasterOldRegionSet _old_set; | |
251 | |
2152 | 252 // It keeps track of the humongous regions. |
253 MasterHumongousRegionSet _humongous_set; | |
342 | 254 |
255 // 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
|
256 uint _expansion_regions; |
342 | 257 |
258 // The block offset table for the G1 heap. | |
259 G1BlockOffsetSharedArray* _bot_shared; | |
260 | |
4072 | 261 // Tears down the region sets / lists so that they are empty and the |
262 // regions on the heap do not belong to a region set / list. The | |
263 // only exception is the humongous set which we leave unaltered. If | |
264 // free_list_only is true, it will only tear down the master free | |
265 // list. It is called before a Full GC (free_list_only == false) or | |
266 // before heap shrinking (free_list_only == true). | |
267 void tear_down_region_sets(bool free_list_only); | |
268 | |
269 // Rebuilds the region sets / lists so that they are repopulated to | |
270 // reflect the contents of the heap. The only exception is the | |
271 // humongous set which was not torn down in the first place. If | |
272 // free_list_only is true, it will only rebuild the master free | |
273 // list. It is called after a Full GC (free_list_only == false) or | |
274 // after heap shrinking (free_list_only == true). | |
275 void rebuild_region_sets(bool free_list_only); | |
342 | 276 |
277 // The sequence of all heap regions in the heap. | |
3766 | 278 HeapRegionSeq _hrs; |
342 | 279 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
280 // Alloc region used to satisfy mutator allocation requests. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
281 MutatorAllocRegion _mutator_alloc_region; |
342 | 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 // survivor objects. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
285 SurvivorGCAllocRegion _survivor_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 survivors. |
288 PLABStats _survivor_plab_stats; | |
289 | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
290 // 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
|
291 // old objects. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
292 OldGCAllocRegion _old_gc_alloc_region; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
293 |
6595 | 294 // PLAB sizing policy for tenured objects. |
295 PLABStats _old_plab_stats; | |
296 | |
297 PLABStats* stats_for_purpose(GCAllocPurpose purpose) { | |
298 PLABStats* stats = NULL; | |
299 | |
300 switch (purpose) { | |
301 case GCAllocForSurvived: | |
302 stats = &_survivor_plab_stats; | |
303 break; | |
304 case GCAllocForTenured: | |
305 stats = &_old_plab_stats; | |
306 break; | |
307 default: | |
308 assert(false, "unrecognized GCAllocPurpose"); | |
309 } | |
310 | |
311 return stats; | |
312 } | |
313 | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
314 // 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
|
315 // 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
|
316 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
|
317 |
4781
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
318 // 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
|
319 // 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
|
320 // 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
|
321 // 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
|
322 // 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
|
323 // start of each GC. |
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
324 bool _expand_heap_after_alloc_failure; |
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
325 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
326 // 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
|
327 void init_mutator_alloc_region(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
328 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
329 // It releases the mutator alloc region. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
330 void release_mutator_alloc_region(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
331 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
332 // It initializes the GC alloc regions at the start of a GC. |
10405 | 333 void init_gc_alloc_regions(EvacuationInfo& evacuation_info); |
342 | 334 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
335 // It releases the GC alloc regions at the end of a GC. |
10405 | 336 void release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info); |
342 | 337 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
338 // 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
|
339 // before a Full GC. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
340 void abandon_gc_alloc_regions(); |
342 | 341 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
342 // Helper for monitoring and management support. |
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
343 G1MonitoringSupport* _g1mm; |
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
344 |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
345 // Determines PLAB size for a particular allocation purpose. |
6595 | 346 size_t desired_plab_sz(GCAllocPurpose purpose); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
347 |
342 | 348 // Outside of GC pauses, the number of bytes used in all regions other |
349 // than the current allocation region. | |
350 size_t _summary_bytes_used; | |
351 | |
526 | 352 // This is used for a quick test on whether a reference points into |
353 // the collection set or not. Basically, we have an array, with one | |
354 // byte per region, and that byte denotes whether the corresponding | |
355 // region is in the collection set or not. The entry corresponding | |
356 // the bottom of the heap, i.e., region 0, is pointed to by | |
357 // _in_cset_fast_test_base. The _in_cset_fast_test field has been | |
358 // biased so that it actually points to address 0 of the address | |
359 // space, to make the test as fast as possible (we can simply shift | |
360 // the address to address into it, instead of having to subtract the | |
361 // bottom of the heap from the address before shifting it; basically | |
362 // it works in the same way the card table works). | |
363 bool* _in_cset_fast_test; | |
364 | |
365 // The allocated array used for the fast test on whether a reference | |
366 // points into the collection set or not. This field is also used to | |
367 // free the array. | |
368 bool* _in_cset_fast_test_base; | |
369 | |
370 // 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
|
371 uint _in_cset_fast_test_length; |
526 | 372 |
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
|
373 volatile unsigned _gc_time_stamp; |
342 | 374 |
375 size_t* _surviving_young_words; | |
376 | |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
377 G1HRPrinter _hr_printer; |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
378 |
342 | 379 void setup_surviving_young_words(); |
380 void update_surviving_young_words(size_t* surv_young_words); | |
381 void cleanup_surviving_young_words(); | |
382 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
383 // 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
|
384 // 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
|
385 // explicitly started if: |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
386 // (a) cause == _gc_locker and +GCLockerInvokesConcurrent, or |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
387 // (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
|
388 // (c) cause == _g1_humongous_allocation |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
389 bool should_do_concurrent_full_gc(GCCause::Cause cause); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
390 |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
391 // 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
|
392 // concurrent cycles) we have started. |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
393 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
|
394 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
395 // 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
|
396 // concurrent cycles) we have completed. |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
397 volatile unsigned int _old_marking_cycles_completed; |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
398 |
10405 | 399 bool _concurrent_cycle_started; |
400 | |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2435
diff
changeset
|
401 // 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
|
402 // 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
|
403 // 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
|
404 // frequent marking cycles and stress the cleanup / concurrent |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2435
diff
changeset
|
405 // 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
|
406 // 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
|
407 void allocate_dummy_regions() PRODUCT_RETURN; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2435
diff
changeset
|
408 |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
409 // 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
|
410 void clear_rsets_post_compaction(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
411 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
412 // 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
|
413 // heap after a compaction. |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
414 void print_hrs_post_compaction(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
415 |
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
|
416 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
|
417 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
|
418 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
|
419 |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
420 void log_gc_header(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
421 void log_gc_footer(double pause_time_sec); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
422 |
1973 | 423 // These are macros so that, if the assert fires, we get the correct |
424 // line number, file, etc. | |
425 | |
2361 | 426 #define heap_locking_asserts_err_msg(_extra_message_) \ |
2152 | 427 err_msg("%s : Heap_lock locked: %s, at safepoint: %s, is VM thread: %s", \ |
2361 | 428 (_extra_message_), \ |
2152 | 429 BOOL_TO_STR(Heap_lock->owned_by_self()), \ |
430 BOOL_TO_STR(SafepointSynchronize::is_at_safepoint()), \ | |
431 BOOL_TO_STR(Thread::current()->is_VM_thread())) | |
1973 | 432 |
433 #define assert_heap_locked() \ | |
434 do { \ | |
435 assert(Heap_lock->owned_by_self(), \ | |
436 heap_locking_asserts_err_msg("should be holding the Heap_lock")); \ | |
437 } while (0) | |
438 | |
2361 | 439 #define assert_heap_locked_or_at_safepoint(_should_be_vm_thread_) \ |
1973 | 440 do { \ |
441 assert(Heap_lock->owned_by_self() || \ | |
2152 | 442 (SafepointSynchronize::is_at_safepoint() && \ |
2361 | 443 ((_should_be_vm_thread_) == Thread::current()->is_VM_thread())), \ |
1973 | 444 heap_locking_asserts_err_msg("should be holding the Heap_lock or " \ |
445 "should be at a safepoint")); \ | |
446 } while (0) | |
447 | |
448 #define assert_heap_locked_and_not_at_safepoint() \ | |
449 do { \ | |
450 assert(Heap_lock->owned_by_self() && \ | |
451 !SafepointSynchronize::is_at_safepoint(), \ | |
452 heap_locking_asserts_err_msg("should be holding the Heap_lock and " \ | |
453 "should not be at a safepoint")); \ | |
454 } while (0) | |
455 | |
456 #define assert_heap_not_locked() \ | |
457 do { \ | |
458 assert(!Heap_lock->owned_by_self(), \ | |
459 heap_locking_asserts_err_msg("should not be holding the Heap_lock")); \ | |
460 } while (0) | |
461 | |
462 #define assert_heap_not_locked_and_not_at_safepoint() \ | |
463 do { \ | |
464 assert(!Heap_lock->owned_by_self() && \ | |
465 !SafepointSynchronize::is_at_safepoint(), \ | |
466 heap_locking_asserts_err_msg("should not be holding the Heap_lock and " \ | |
467 "should not be at a safepoint")); \ | |
468 } while (0) | |
469 | |
2361 | 470 #define assert_at_safepoint(_should_be_vm_thread_) \ |
1973 | 471 do { \ |
2152 | 472 assert(SafepointSynchronize::is_at_safepoint() && \ |
2361 | 473 ((_should_be_vm_thread_) == Thread::current()->is_VM_thread()), \ |
1973 | 474 heap_locking_asserts_err_msg("should be at a safepoint")); \ |
475 } while (0) | |
476 | |
477 #define assert_not_at_safepoint() \ | |
478 do { \ | |
479 assert(!SafepointSynchronize::is_at_safepoint(), \ | |
480 heap_locking_asserts_err_msg("should not be at a safepoint")); \ | |
481 } while (0) | |
482 | |
342 | 483 protected: |
484 | |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
485 // The young region list. |
342 | 486 YoungList* _young_list; |
487 | |
488 // The current policy object for the collector. | |
489 G1CollectorPolicy* _g1_policy; | |
490 | |
2152 | 491 // 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
|
492 // 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
|
493 // check whether there's anything available on the |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
494 // 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
|
495 // that list, if _free_regions_coming is set. |
2361 | 496 HeapRegion* new_region_try_secondary_free_list(); |
342 | 497 |
2361 | 498 // Try to allocate a single non-humongous HeapRegion sufficient for |
499 // an allocation of the given word_size. If do_expand is true, | |
500 // attempt to expand the heap if necessary to satisfy the allocation | |
501 // request. | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
502 HeapRegion* new_region(size_t word_size, bool do_expand); |
342 | 503 |
2361 | 504 // Attempt to satisfy a humongous allocation request of the given |
505 // size by finding a contiguous set of free regions of num_regions | |
506 // length and remove them from the master free list. Return the | |
3766 | 507 // index of the first region or G1_NULL_HRS_INDEX if the search |
508 // was unsuccessful. | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
509 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
|
510 size_t word_size); |
342 | 511 |
2361 | 512 // Initialize a contiguous set of free regions of length num_regions |
513 // and starting at index first so that they appear as a single | |
514 // humongous region. | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
515 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
|
516 uint num_regions, |
2361 | 517 size_t word_size); |
518 | |
519 // Attempt to allocate a humongous object of the given size. Return | |
520 // NULL if unsuccessful. | |
2152 | 521 HeapWord* humongous_obj_allocate(size_t word_size); |
1973 | 522 |
523 // The following two methods, allocate_new_tlab() and | |
524 // mem_allocate(), are the two main entry points from the runtime | |
525 // into the G1's allocation routines. They have the following | |
526 // assumptions: | |
527 // | |
528 // * They should both be called outside safepoints. | |
529 // | |
530 // * They should both be called without holding the Heap_lock. | |
531 // | |
532 // * All allocation requests for new TLABs should go to | |
533 // allocate_new_tlab(). | |
534 // | |
3774
c9ca3f51cf41
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
3772
diff
changeset
|
535 // * All non-TLAB allocation requests should go to mem_allocate(). |
1973 | 536 // |
537 // * If either call cannot satisfy the allocation request using the | |
538 // current allocating region, they will try to get a new one. If | |
539 // this fails, they will attempt to do an evacuation pause and | |
540 // retry the allocation. | |
541 // | |
542 // * If all allocation attempts fail, even after trying to schedule | |
543 // an evacuation pause, allocate_new_tlab() will return NULL, | |
544 // whereas mem_allocate() will attempt a heap expansion and/or | |
545 // schedule a Full GC. | |
546 // | |
547 // * We do not allow humongous-sized TLABs. So, allocate_new_tlab | |
548 // should never be called with word_size being humongous. All | |
549 // humongous allocation requests should go to mem_allocate() which | |
550 // will satisfy them with a special path. | |
551 | |
552 virtual HeapWord* allocate_new_tlab(size_t word_size); | |
553 | |
554 virtual HeapWord* mem_allocate(size_t word_size, | |
555 bool* gc_overhead_limit_was_exceeded); | |
342 | 556 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
557 // 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
|
558 // 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
|
559 // 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
|
560 // 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
|
561 // 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
|
562 // 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
|
563 // 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
|
564 // Heap_lock just to read the GC count. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
565 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
566 // 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
|
567 // 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
|
568 // should only be used for non-humongous allocations. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
569 inline HeapWord* attempt_allocation(size_t word_size, |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
570 unsigned int* gc_count_before_ret, |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
571 int* gclocker_retry_count_ret); |
342 | 572 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
573 // 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
|
574 // retry the allocation attempt, potentially scheduling a GC |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
575 // 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
|
576 HeapWord* attempt_allocation_slow(size_t word_size, |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
577 unsigned int* gc_count_before_ret, |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
578 int* gclocker_retry_count_ret); |
2134
b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
tonyp
parents:
2133
diff
changeset
|
579 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
580 // 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
|
581 // potentially schedule a GC pause. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
582 HeapWord* attempt_allocation_humongous(size_t word_size, |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
583 unsigned int* gc_count_before_ret, |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
changeset
|
584 int* gclocker_retry_count_ret); |
1973 | 585 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
586 // 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
|
587 // 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
|
588 // 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
|
589 // or not. |
1973 | 590 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
|
591 bool expect_null_mutator_alloc_region); |
1973 | 592 |
593 // It dirties the cards that cover the block so that so that the post | |
594 // write barrier never queues anything when updating objects on this | |
595 // block. It is assumed (and in fact we assert) that the block | |
596 // belongs to a young region. | |
597 inline void dirty_young_block(HeapWord* start, size_t word_size); | |
342 | 598 |
599 // Allocate blocks during garbage collection. Will ensure an | |
600 // allocation region, either by picking one or expanding the | |
601 // heap, and then allocate a block of the given size. The block | |
602 // may not be a humongous - it must fit into a single heap region. | |
603 HeapWord* par_allocate_during_gc(GCAllocPurpose purpose, size_t word_size); | |
604 | |
605 // Ensure that no further allocations can happen in "r", bearing in mind | |
606 // that parallel threads might be attempting allocations. | |
607 void par_allocate_remaining_space(HeapRegion* r); | |
608 | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
609 // 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
|
610 inline HeapWord* survivor_attempt_allocation(size_t word_size); |
545 | 611 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
612 // 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
|
613 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
|
614 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
615 // 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
|
616 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
617 // For mutator alloc regions. |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
618 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
|
619 void retire_mutator_alloc_region(HeapRegion* alloc_region, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
620 size_t allocated_bytes); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
621 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
622 // For GC alloc regions. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
623 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
|
624 GCAllocPurpose ap); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3823
diff
changeset
|
625 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
|
626 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
|
627 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
628 // - if explicit_gc is true, the GC is for a System.gc() or a heap |
1973 | 629 // inspection request and should collect the entire heap |
630 // - if clear_all_soft_refs is true, all soft references should be | |
631 // cleared during the GC | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
632 // - if explicit_gc is false, word_size describes the allocation that |
1973 | 633 // the GC should attempt (at least) to satisfy |
634 // - it returns false if it is unable to do the collection due to the | |
635 // GC locker being active, true otherwise | |
636 bool do_collection(bool explicit_gc, | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
637 bool clear_all_soft_refs, |
342 | 638 size_t word_size); |
639 | |
640 // Callback from VM_G1CollectFull operation. | |
641 // Perform a full collection. | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
642 virtual void do_full_collection(bool clear_all_soft_refs); |
342 | 643 |
644 // Resize the heap if necessary after a full collection. If this is | |
645 // after a collect-for allocation, "word_size" is the allocation size, | |
646 // and will be considered part of the used portion of the heap. | |
647 void resize_if_necessary_after_full_collection(size_t word_size); | |
648 | |
649 // Callback from VM_G1CollectForAllocation operation. | |
650 // This function does everything necessary/possible to satisfy a | |
651 // failed allocation request (including collection, expansion, etc.) | |
1973 | 652 HeapWord* satisfy_failed_allocation(size_t word_size, bool* succeeded); |
342 | 653 |
654 // Attempting to expand the heap sufficiently | |
655 // to support an allocation of the given "word_size". If | |
656 // successful, perform the allocation and return the address of the | |
657 // allocated block, or else "NULL". | |
1973 | 658 HeapWord* expand_and_allocate(size_t word_size); |
342 | 659 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
660 // Process any reference objects discovered during |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
661 // an incremental evacuation pause. |
6819 | 662 void process_discovered_references(uint no_of_gc_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
663 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
664 // Enqueue any remaining discovered references |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
665 // after processing. |
6819 | 666 void enqueue_discovered_references(uint no_of_gc_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
667 |
342 | 668 public: |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
669 |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
670 G1MonitoringSupport* g1mm() { |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
671 assert(_g1mm != NULL, "should have been initialized"); |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
672 return _g1mm; |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
673 } |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
674 |
342 | 675 // 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
|
676 // 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
|
677 // false otherwise. |
342 | 678 // (Rounds up to a HeapRegion boundary.) |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
679 bool expand(size_t expand_bytes); |
342 | 680 |
681 // Do anything common to GC's. | |
682 virtual void gc_prologue(bool full); | |
683 virtual void gc_epilogue(bool full); | |
684 | |
8505
dee7c8b578c7
-Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
8504
diff
changeset
|
685 #ifdef GRAAL |
dee7c8b578c7
-Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
8504
diff
changeset
|
686 HeapWord** top_addr() const; |
dee7c8b578c7
-Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
8504
diff
changeset
|
687 HeapWord** end_addr() const; |
dee7c8b578c7
-Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
8504
diff
changeset
|
688 |
dee7c8b578c7
-Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
8504
diff
changeset
|
689 #endif |
dee7c8b578c7
-Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
8504
diff
changeset
|
690 |
526 | 691 // We register a region with the fast "in collection set" test. We |
692 // simply set to true the array slot corresponding to this region. | |
693 void register_region_with_in_cset_fast_test(HeapRegion* r) { | |
694 assert(_in_cset_fast_test_base != NULL, "sanity"); | |
695 assert(r->in_collection_set(), "invariant"); | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
696 uint index = r->hrs_index(); |
3766 | 697 assert(index < _in_cset_fast_test_length, "invariant"); |
526 | 698 assert(!_in_cset_fast_test_base[index], "invariant"); |
699 _in_cset_fast_test_base[index] = true; | |
700 } | |
701 | |
702 // This is a fast test on whether a reference points into the | |
703 // collection set or not. It does not assume that the reference | |
704 // points into the heap; if it doesn't, it will return false. | |
705 bool in_cset_fast_test(oop obj) { | |
706 assert(_in_cset_fast_test != NULL, "sanity"); | |
707 if (_g1_committed.contains((HeapWord*) obj)) { | |
708 // no need to subtract the bottom of the heap from obj, | |
709 // _in_cset_fast_test is biased | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
710 uintx index = (uintx) obj >> HeapRegion::LogOfHRGrainBytes; |
526 | 711 bool ret = _in_cset_fast_test[index]; |
712 // let's make sure the result is consistent with what the slower | |
713 // test returns | |
714 assert( ret || !obj_in_cs(obj), "sanity"); | |
715 assert(!ret || obj_in_cs(obj), "sanity"); | |
716 return ret; | |
717 } else { | |
718 return false; | |
719 } | |
720 } | |
721 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
722 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
|
723 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
|
724 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
|
725 (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
|
726 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
727 |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
728 // 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
|
729 // 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
|
730 void increment_old_marking_cycles_started(); |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
731 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
732 // 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
|
733 // 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
|
734 // 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
|
735 // 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
|
736 // 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
|
737 // 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
|
738 // 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
|
739 // 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
|
740 // 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
|
741 // 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
|
742 // 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
|
743 // 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
|
744 // 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
|
745 // +ExplicitGCInvokesConcurrent). |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
746 void increment_old_marking_cycles_completed(bool concurrent); |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
747 |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
748 unsigned int old_marking_cycles_completed() { |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6010
diff
changeset
|
749 return _old_marking_cycles_completed; |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
750 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
751 |
10405 | 752 void register_concurrent_cycle_start(jlong start_time); |
753 void register_concurrent_cycle_end(); | |
754 void trace_heap_after_concurrent_cycle(); | |
755 | |
756 G1YCType yc_type(); | |
757 | |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
758 G1HRPrinter* hr_printer() { return &_hr_printer; } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
759 |
342 | 760 protected: |
761 | |
762 // Shrink the garbage-first heap by at most the given size (in bytes!). | |
763 // (Rounds down to a HeapRegion boundary.) | |
764 virtual void shrink(size_t expand_bytes); | |
765 void shrink_helper(size_t expand_bytes); | |
766 | |
1709 | 767 #if TASKQUEUE_STATS |
768 static void print_taskqueue_stats_hdr(outputStream* const st = gclog_or_tty); | |
769 void print_taskqueue_stats(outputStream* const st = gclog_or_tty) const; | |
770 void reset_taskqueue_stats(); | |
771 #endif // TASKQUEUE_STATS | |
772 | |
1973 | 773 // Schedule the VM operation that will do an evacuation pause to |
774 // satisfy an allocation request of word_size. *succeeded will | |
775 // return whether the VM operation was successful (it did do an | |
776 // evacuation pause) or not (another thread beat us to it or the GC | |
777 // locker was active). Given that we should not be holding the | |
778 // Heap_lock when we enter this method, we will pass the | |
779 // gc_count_before (i.e., total_collections()) as a parameter since | |
780 // it has to be read while holding the Heap_lock. Currently, both | |
781 // methods that call do_collection_pause() release the Heap_lock | |
782 // before the call, so it's easy to read gc_count_before just before. | |
783 HeapWord* do_collection_pause(size_t word_size, | |
784 unsigned int gc_count_before, | |
785 bool* succeeded); | |
342 | 786 |
787 // The guts of the incremental collection pause, executed by the vm | |
1973 | 788 // thread. It returns false if it is unable to do the collection due |
789 // to the GC locker being active, true otherwise | |
790 bool do_collection_pause_at_safepoint(double target_pause_time_ms); | |
342 | 791 |
792 // Actually do the work of evacuating the collection set. | |
10405 | 793 void evacuate_collection_set(EvacuationInfo& evacuation_info); |
342 | 794 |
795 // The g1 remembered set of the heap. | |
796 G1RemSet* _g1_rem_set; | |
797 // And it's mod ref barrier set, used to track updates for the above. | |
798 ModRefBarrierSet* _mr_bs; | |
799 | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
545
diff
changeset
|
800 // 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
|
801 // concurrently after the collection. |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
545
diff
changeset
|
802 DirtyCardQueueSet _dirty_card_queue_set; |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
545
diff
changeset
|
803 |
342 | 804 // The closure used to refine a single card. |
805 RefineCardTableEntryClosure* _refine_cte_cl; | |
806 | |
807 // A function to check the consistency of dirty card logs. | |
808 void check_ct_logs_at_safepoint(); | |
809 | |
1705 | 810 // A DirtyCardQueueSet that is used to hold cards that contain |
811 // references into the current collection set. This is used to | |
812 // update the remembered sets of the regions in the collection | |
813 // set in the event of an evacuation failure. | |
814 DirtyCardQueueSet _into_cset_dirty_card_queue_set; | |
815 | |
342 | 816 // After a collection pause, make the regions in the CS into free |
817 // regions. | |
10405 | 818 void free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info); |
342 | 819 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
820 // 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
|
821 // 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
|
822 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
|
823 |
342 | 824 // Applies "scan_non_heap_roots" to roots outside the heap, |
825 // "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
|
826 // indicate the region in which the root resides), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
827 // and does "scan_metadata" If "scan_rs" is |
342 | 828 // NULL, then this step is skipped. The "worker_i" |
829 // param is for use with parallel roots processing, and should be | |
830 // the "i" of the calling parallel worker thread's work(i) function. | |
831 // 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
|
832 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
|
833 ScanningOption so, |
342 | 834 OopClosure* scan_non_heap_roots, |
835 OopsInHeapRegionClosure* scan_rs, | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
836 G1KlassScanClosure* scan_klasses, |
342 | 837 int worker_i); |
838 | |
839 // Apply "blk" to all the weak roots of the system. These include | |
840 // JNI weak roots, the code cache, system dictionary, symbol table, | |
841 // string table, and referents of reachable weak refs. | |
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
9076
diff
changeset
|
842 void g1_process_weak_roots(OopClosure* root_closure); |
342 | 843 |
2361 | 844 // Frees a non-humongous region by initializing its contents and |
2152 | 845 // adding it to the free list that's passed as a parameter (this is |
846 // usually a local list which will be appended to the master free | |
847 // list later). The used bytes of freed regions are accumulated in | |
848 // pre_used. If par is true, the region's RSet will not be freed | |
849 // up. The assumption is that this will be done later. | |
850 void free_region(HeapRegion* hr, | |
851 size_t* pre_used, | |
852 FreeRegionList* free_list, | |
853 bool par); | |
342 | 854 |
2361 | 855 // Frees a humongous region by collapsing it into individual regions |
856 // and calling free_region() for each of them. The freed regions | |
857 // will be added to the free list that's passed as a parameter (this | |
858 // is usually a local list which will be appended to the master free | |
859 // list later). The used bytes of freed regions are accumulated in | |
860 // pre_used. If par is true, the region's RSet will not be freed | |
861 // up. The assumption is that this will be done later. | |
2152 | 862 void free_humongous_region(HeapRegion* hr, |
863 size_t* pre_used, | |
864 FreeRegionList* free_list, | |
865 HumongousRegionSet* humongous_proxy_set, | |
866 bool par); | |
342 | 867 |
3766 | 868 // Notifies all the necessary spaces that the committed space has |
869 // been updated (either expanded or shrunk). It should be called | |
870 // after _g1_storage is updated. | |
871 void update_committed_space(HeapWord* old_end, HeapWord* new_end); | |
872 | |
342 | 873 // The concurrent marker (and the thread it runs in.) |
874 ConcurrentMark* _cm; | |
875 ConcurrentMarkThread* _cmThread; | |
876 bool _mark_in_progress; | |
877 | |
878 // The concurrent refiner. | |
879 ConcurrentG1Refine* _cg1r; | |
880 | |
881 // The parallel task queues | |
882 RefToScanQueueSet *_task_queues; | |
883 | |
884 // True iff a evacuation has failed in the current collection. | |
885 bool _evacuation_failed; | |
886 | |
10405 | 887 EvacuationFailedInfo* _evacuation_failed_info_array; |
342 | 888 |
889 // Failed evacuations cause some logical from-space objects to have | |
890 // forwarding pointers to themselves. Reset them. | |
891 void remove_self_forwarding_pointers(); | |
892 | |
8038
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
6819
diff
changeset
|
893 // Together, these store an object with a preserved mark, and its mark value. |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
6819
diff
changeset
|
894 Stack<oop, mtGC> _objs_with_preserved_marks; |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
6819
diff
changeset
|
895 Stack<markOop, mtGC> _preserved_marks_of_objs; |
342 | 896 |
897 // Preserve the mark of "obj", if necessary, in preparation for its mark | |
898 // word being overwritten with a self-forwarding-pointer. | |
899 void preserve_mark_if_necessary(oop obj, markOop m); | |
900 | |
901 // The stack of evac-failure objects left to be scanned. | |
902 GrowableArray<oop>* _evac_failure_scan_stack; | |
903 // The closure to apply to evac-failure objects. | |
904 | |
905 OopsInHeapRegionClosure* _evac_failure_closure; | |
906 // Set the field above. | |
907 void | |
908 set_evac_failure_closure(OopsInHeapRegionClosure* evac_failure_closure) { | |
909 _evac_failure_closure = evac_failure_closure; | |
910 } | |
911 | |
912 // Push "obj" on the scan stack. | |
913 void push_on_evac_failure_scan_stack(oop obj); | |
914 // Process scan stack entries until the stack is empty. | |
915 void drain_evac_failure_scan_stack(); | |
916 // True iff an invocation of "drain_scan_stack" is in progress; to | |
917 // prevent unnecessary recursion. | |
918 bool _drain_in_progress; | |
919 | |
920 // Do any necessary initialization for evacuation-failure handling. | |
921 // "cl" is the closure that will be used to process evac-failure | |
922 // objects. | |
923 void init_for_evac_failure(OopsInHeapRegionClosure* cl); | |
924 // Do any necessary cleanup for evacuation-failure handling data | |
925 // structures. | |
926 void finalize_for_evac_failure(); | |
927 | |
928 // An attempt to evacuate "obj" has failed; take necessary steps. | |
10405 | 929 oop handle_evacuation_failure_par(G1ParScanThreadState* _par_scan_state, oop obj); |
342 | 930 void handle_evacuation_failure_common(oop obj, markOop m); |
931 | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
932 #ifndef PRODUCT |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
933 // Support for forcing evacuation failures. Analogous to |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
934 // PromotionFailureALot for the other collectors. |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
935 |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
936 // Records whether G1EvacuationFailureALot should be in effect |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
937 // for the current GC |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
938 bool _evacuation_failure_alot_for_current_gc; |
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 // 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
|
941 // determining whether G1EvaucationFailureALot is in effect |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
942 // for the current GC. |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
943 size_t _evacuation_failure_alot_gc_number; |
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 // 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
|
946 volatile size_t _evacuation_failure_alot_count; |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
947 |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
948 // Set whether G1EvacuationFailureALot should be in effect |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
949 // 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
|
950 // command line flags are set); |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
951 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
|
952 bool during_initial_mark, |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
953 bool during_marking); |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
954 |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
955 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
|
956 |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
957 // 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
|
958 inline bool evacuation_should_fail(); |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
959 |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
960 // Reset the G1EvacuationFailureALot counters. Should be called at |
10405 | 961 // the end of an evacuation pause in which an evacuation failure occurred. |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
962 inline void reset_evacuation_should_fail(); |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
963 #endif // !PRODUCT |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
964 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
965 // ("Weak") Reference processing support. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
966 // |
10405 | 967 // G1 has 2 instances of the reference processor class. One |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
968 // (_ref_processor_cm) handles reference object discovery |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
969 // and subsequent processing during concurrent marking cycles. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
970 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
971 // The other (_ref_processor_stw) handles reference object |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
972 // discovery and processing during full GCs and incremental |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
973 // evacuation pauses. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
974 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
975 // During an incremental pause, reference discovery will be |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
976 // temporarily disabled for _ref_processor_cm and will be |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
977 // enabled for _ref_processor_stw. At the end of the evacuation |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
978 // pause references discovered by _ref_processor_stw will be |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
979 // processed and discovery will be disabled. The previous |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
980 // setting for reference object discovery for _ref_processor_cm |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
981 // will be re-instated. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
982 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
983 // At the start of marking: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
984 // * Discovery by the CM ref processor is verified to be inactive |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
985 // and it's discovered lists are empty. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
986 // * Discovery by the CM ref processor is then enabled. |
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 // At the end of marking: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
989 // * Any references on the CM ref processor's discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
990 // lists are processed (possibly MT). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
991 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
992 // At the start of full GC we: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
993 // * Disable discovery by the CM ref processor and |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
994 // empty CM ref processor's discovered lists |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
995 // (without processing any entries). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
996 // * Verify that the STW ref processor is inactive and it's |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
997 // discovered lists are empty. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
998 // * Temporarily set STW ref processor discovery as single threaded. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
999 // * Temporarily clear the STW ref processor's _is_alive_non_header |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1000 // field. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1001 // * Finally enable discovery by the STW ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1002 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1003 // The STW ref processor is used to record any discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1004 // references during the full GC. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1005 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1006 // At the end of a full GC we: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1007 // * Enqueue any reference objects discovered by the STW ref processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1008 // that have non-live referents. This has the side-effect of |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1009 // making the STW ref processor inactive by disabling discovery. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1010 // * Verify that the CM ref processor is still inactive |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1011 // and no references have been placed on it's discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1012 // lists (also checked as a precondition during initial marking). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1013 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1014 // The (stw) reference processor... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1015 ReferenceProcessor* _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1016 |
10405 | 1017 STWGCTimer* _gc_timer_stw; |
1018 ConcurrentGCTimer* _gc_timer_cm; | |
1019 | |
1020 G1OldTracer* _gc_tracer_cm; | |
1021 G1NewTracer* _gc_tracer_stw; | |
1022 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1023 // During reference object discovery, the _is_alive_non_header |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1024 // closure (if non-null) is applied to the referent object to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1025 // determine whether the referent is live. If so then the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1026 // reference object does not need to be 'discovered' and can |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1027 // 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
|
1028 // the number of 'discovered' reference objects that need to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1029 // be processed. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1030 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1031 // Instance of the is_alive closure for embedding into the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1032 // STW reference processor as the _is_alive_non_header field. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1033 // Supplying a value for the _is_alive_non_header field is |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1034 // optional but doing so prevents unnecessary additions to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1035 // the discovered lists during reference discovery. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1036 G1STWIsAliveClosure _is_alive_closure_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1037 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1038 // The (concurrent marking) reference processor... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1039 ReferenceProcessor* _ref_processor_cm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1040 |
2037
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
2030
diff
changeset
|
1041 // Instance of the concurrent mark is_alive closure for embedding |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1042 // into the Concurrent Marking reference processor as the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1043 // _is_alive_non_header field. Supplying a value for the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1044 // _is_alive_non_header field is optional but doing so prevents |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1045 // unnecessary additions to the discovered lists during reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1046 // discovery. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1047 G1CMIsAliveClosure _is_alive_closure_cm; |
342 | 1048 |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1049 // 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
|
1050 HeapRegion** _worker_cset_start_region; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1051 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1052 // 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
|
1053 // 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
|
1054 // 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
|
1055 // 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
|
1056 // of G1CollectedHeap::_gc_time_stamp. |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1057 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
|
1058 |
342 | 1059 enum G1H_process_strong_roots_tasks { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
1060 G1H_PS_filter_satb_buffers, |
342 | 1061 G1H_PS_refProcessor_oops_do, |
1062 // Leave this one last. | |
1063 G1H_PS_NumElements | |
1064 }; | |
1065 | |
1066 SubTasksDone* _process_strong_tasks; | |
1067 | |
2152 | 1068 volatile bool _free_regions_coming; |
342 | 1069 |
1070 public: | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1718
diff
changeset
|
1071 |
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1718
diff
changeset
|
1072 SubTasksDone* process_strong_tasks() { return _process_strong_tasks; } |
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1718
diff
changeset
|
1073 |
342 | 1074 void set_refine_cte_cl_concurrency(bool concurrent); |
1075 | |
1709 | 1076 RefToScanQueue *task_queue(int i) const; |
342 | 1077 |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
545
diff
changeset
|
1078 // 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
|
1079 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
|
1080 |
1705 | 1081 // A DirtyCardQueueSet that is used to hold cards that contain |
1082 // references into the current collection set. This is used to | |
1083 // update the remembered sets of the regions in the collection | |
1084 // set in the event of an evacuation failure. | |
1085 DirtyCardQueueSet& into_cset_dirty_card_queue_set() | |
1086 { return _into_cset_dirty_card_queue_set; } | |
1087 | |
342 | 1088 // Create a G1CollectedHeap with the specified policy. |
1089 // Must call the initialize method afterwards. | |
1090 // May not return if something goes wrong. | |
1091 G1CollectedHeap(G1CollectorPolicy* policy); | |
1092 | |
1093 // 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
|
1094 // maximum sizes and remembered and barrier sets |
342 | 1095 // specified by the policy object. |
1096 jint initialize(); | |
1097 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1098 // Initialize weak reference processing. |
2037
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
2030
diff
changeset
|
1099 virtual void ref_processing_init(); |
342 | 1100 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4709
diff
changeset
|
1101 void set_par_threads(uint t) { |
342 | 1102 SharedHeap::set_par_threads(t); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1103 // Done in SharedHeap but oddly there are |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1104 // two _process_strong_tasks's in a G1CollectedHeap |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1105 // so do it here too. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1106 _process_strong_tasks->set_n_threads(t); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1107 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1108 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1109 // Set _n_par_threads according to a policy TBD. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1110 void set_par_threads(); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1111 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1112 void set_n_termination(int t) { |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1718
diff
changeset
|
1113 _process_strong_tasks->set_n_threads(t); |
342 | 1114 } |
1115 | |
1116 virtual CollectedHeap::Name kind() const { | |
1117 return CollectedHeap::G1CollectedHeap; | |
1118 } | |
1119 | |
1120 // The current policy object for the collector. | |
1121 G1CollectorPolicy* g1_policy() const { return _g1_policy; } | |
1122 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1123 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
|
1124 |
342 | 1125 // Adaptive size policy. No such thing for g1. |
1126 virtual AdaptiveSizePolicy* size_policy() { return NULL; } | |
1127 | |
1128 // The rem set and barrier set. | |
1129 G1RemSet* g1_rem_set() const { return _g1_rem_set; } | |
1130 ModRefBarrierSet* mr_bs() const { return _mr_bs; } | |
1131 | |
1132 unsigned get_gc_time_stamp() { | |
1133 return _gc_time_stamp; | |
1134 } | |
1135 | |
1136 void reset_gc_time_stamp() { | |
1137 _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
|
1138 OrderAccess::fence(); |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1139 // 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
|
1140 // 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
|
1141 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
|
1142 } |
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
|
1143 |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1144 void check_gc_time_stamps() PRODUCT_RETURN; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1145 |
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
|
1146 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
|
1147 ++_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
|
1148 OrderAccess::fence(); |
342 | 1149 } |
1150 | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1151 // 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
|
1152 // also reset the GC timestamp of its corresponding |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1153 // continues humongous regions too. |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1154 void reset_gc_time_stamps(HeapRegion* hr); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1155 |
1705 | 1156 void iterate_dirty_card_closure(CardTableEntryClosure* cl, |
1157 DirtyCardQueue* into_cset_dcq, | |
1158 bool concurrent, int worker_i); | |
342 | 1159 |
1160 // The shared block offset table array. | |
1161 G1BlockOffsetSharedArray* bot_shared() const { return _bot_shared; } | |
1162 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1163 // Reference Processing accessors |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1164 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1165 // The STW reference processor.... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1166 ReferenceProcessor* ref_processor_stw() const { return _ref_processor_stw; } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1167 |
10405 | 1168 // The Concurrent Marking reference processor... |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1169 ReferenceProcessor* ref_processor_cm() const { return _ref_processor_cm; } |
342 | 1170 |
10405 | 1171 ConcurrentGCTimer* gc_timer_cm() const { return _gc_timer_cm; } |
1172 G1OldTracer* gc_tracer_cm() const { return _gc_tracer_cm; } | |
1173 | |
342 | 1174 virtual size_t capacity() const; |
1175 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
|
1176 // 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
|
1177 // 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
|
1178 size_t used_unlocked() const; |
342 | 1179 size_t recalculate_used() const; |
1180 | |
1181 // These virtual functions do the actual allocation. | |
1182 // Some heaps may offer a contiguous region for shared non-blocking | |
1183 // allocation, via inlined code (by exporting the address of the top and | |
1184 // end fields defining the extent of the contiguous allocation region.) | |
1185 // But G1CollectedHeap doesn't yet support this. | |
1186 | |
1187 // Return an estimate of the maximum allocation that could be performed | |
1188 // without triggering any collection or expansion activity. In a | |
1189 // generational collector, for example, this is probably the largest | |
1190 // allocation that could be supported (without expansion) in the youngest | |
1191 // generation. It is "unsafe" because no locks are taken; the result | |
1192 // should be treated as an approximation, not a guarantee, for use in | |
1193 // heuristic resizing decisions. | |
1194 virtual size_t unsafe_max_alloc(); | |
1195 | |
1196 virtual bool is_maximal_no_gc() const { | |
1197 return _g1_storage.uncommitted_size() == 0; | |
1198 } | |
1199 | |
1200 // 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
|
1201 uint n_regions() { return _hrs.length(); } |
3766 | 1202 |
1203 // 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
|
1204 uint max_regions() { return _hrs.max_length(); } |
342 | 1205 |
1206 // 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
|
1207 uint free_regions() { return _free_list.length(); } |
342 | 1208 |
1209 // 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
|
1210 uint used_regions() { return n_regions() - free_regions(); } |
342 | 1211 |
1212 // 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
|
1213 uint expansion_regions() { return _expansion_regions; } |
342 | 1214 |
3766 | 1215 // Factory method for HeapRegion instances. It will return NULL if |
1216 // the allocation fails. | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1217 HeapRegion* new_heap_region(uint hrs_index, HeapWord* bottom); |
3766 | 1218 |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3289
diff
changeset
|
1219 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
|
1220 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
|
1221 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
|
1222 void verify_dirty_young_regions() PRODUCT_RETURN; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1223 |
2152 | 1224 // verify_region_sets() performs verification over the region |
1225 // lists. It will be compiled in the product code to be used when | |
1226 // necessary (i.e., during heap verification). | |
1227 void verify_region_sets(); | |
342 | 1228 |
2152 | 1229 // verify_region_sets_optional() is planted in the code for |
1230 // list verification in non-product builds (and it can be enabled in | |
10405 | 1231 // product builds by defining HEAP_REGION_SET_FORCE_VERIFY to be 1). |
2152 | 1232 #if HEAP_REGION_SET_FORCE_VERIFY |
1233 void verify_region_sets_optional() { | |
1234 verify_region_sets(); | |
1235 } | |
1236 #else // HEAP_REGION_SET_FORCE_VERIFY | |
1237 void verify_region_sets_optional() { } | |
1238 #endif // HEAP_REGION_SET_FORCE_VERIFY | |
342 | 1239 |
2152 | 1240 #ifdef ASSERT |
2361 | 1241 bool is_on_master_free_list(HeapRegion* hr) { |
2152 | 1242 return hr->containing_set() == &_free_list; |
1243 } | |
342 | 1244 |
2361 | 1245 bool is_in_humongous_set(HeapRegion* hr) { |
2152 | 1246 return hr->containing_set() == &_humongous_set; |
2361 | 1247 } |
2152 | 1248 #endif // ASSERT |
342 | 1249 |
2152 | 1250 // Wrapper for the region list operations that can be called from |
1251 // methods outside this class. | |
342 | 1252 |
2152 | 1253 void secondary_free_list_add_as_tail(FreeRegionList* list) { |
1254 _secondary_free_list.add_as_tail(list); | |
1255 } | |
342 | 1256 |
2152 | 1257 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
|
1258 _free_list.add_as_head(&_secondary_free_list); |
2152 | 1259 } |
342 | 1260 |
2361 | 1261 void append_secondary_free_list_if_not_empty_with_lock() { |
1262 // If the secondary free list looks empty there's no reason to | |
1263 // take the lock and then try to append it. | |
2152 | 1264 if (!_secondary_free_list.is_empty()) { |
1265 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
1266 append_secondary_free_list(); | |
1267 } | |
1268 } | |
342 | 1269 |
4072 | 1270 void old_set_remove(HeapRegion* hr) { |
1271 _old_set.remove(hr); | |
1272 } | |
1273 | |
4829
9509c20bba28
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
4787
diff
changeset
|
1274 size_t non_young_capacity_bytes() { |
9509c20bba28
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
4787
diff
changeset
|
1275 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
|
1276 } |
9509c20bba28
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
4787
diff
changeset
|
1277 |
2152 | 1278 void set_free_regions_coming(); |
1279 void reset_free_regions_coming(); | |
1280 bool free_regions_coming() { return _free_regions_coming; } | |
1281 void wait_while_free_regions_coming(); | |
342 | 1282 |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
1283 // 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
|
1284 // old GC alloc region. |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
1285 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
|
1286 return hr == _retained_old_gc_alloc_region; |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
1287 } |
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
1288 |
342 | 1289 // Perform a collection of the heap; intended for use in implementing |
1290 // "System.gc". This probably implies as full a collection as the | |
1291 // "CollectedHeap" supports. | |
1292 virtual void collect(GCCause::Cause cause); | |
1293 | |
1294 // The same as above but assume that the caller holds the Heap_lock. | |
1295 void collect_locked(GCCause::Cause cause); | |
1296 | |
10405 | 1297 // True iff an evacuation has failed in the most-recent collection. |
342 | 1298 bool evacuation_failed() { return _evacuation_failed; } |
1299 | |
2152 | 1300 // It will free a region if it has allocated objects in it that are |
1301 // all dead. It calls either free_region() or | |
1302 // free_humongous_region() depending on the type of the region that | |
1303 // is passed to it. | |
2173 | 1304 void free_region_if_empty(HeapRegion* hr, |
1305 size_t* pre_used, | |
1306 FreeRegionList* free_list, | |
4072 | 1307 OldRegionSet* old_proxy_set, |
2173 | 1308 HumongousRegionSet* humongous_proxy_set, |
1309 HRRSCleanupTask* hrrs_cleanup_task, | |
1310 bool par); | |
342 | 1311 |
2152 | 1312 // It appends the free list to the master free list and updates the |
1313 // master humongous list according to the contents of the proxy | |
1314 // list. It also adjusts the total used bytes according to pre_used | |
1315 // (if par is true, it will do so by taking the ParGCRareEvent_lock). | |
1316 void update_sets_after_freeing_regions(size_t pre_used, | |
1317 FreeRegionList* free_list, | |
4072 | 1318 OldRegionSet* old_proxy_set, |
2152 | 1319 HumongousRegionSet* humongous_proxy_set, |
1320 bool par); | |
342 | 1321 |
4708 | 1322 // Returns "TRUE" iff "p" points into the committed areas of the heap. |
342 | 1323 virtual bool is_in(const void* p) const; |
1324 | |
1325 // Return "TRUE" iff the given object address is within the collection | |
1326 // set. | |
1327 inline bool obj_in_cs(oop obj); | |
1328 | |
1329 // 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
|
1330 // region of g1. |
342 | 1331 bool is_in_g1_reserved(const void* p) const { |
1332 return _g1_reserved.contains(p); | |
1333 } | |
1334 | |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2433
diff
changeset
|
1335 // 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
|
1336 // 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
|
1337 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
|
1338 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
|
1339 } |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2433
diff
changeset
|
1340 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2433
diff
changeset
|
1341 // Returns a MemRegion that corresponds to the space that has been |
342 | 1342 // committed in the heap |
1343 MemRegion g1_committed() { | |
1344 return _g1_committed; | |
1345 } | |
1346 | |
2311 | 1347 virtual bool is_in_closed_subset(const void* p) const; |
342 | 1348 |
1349 // This resets the card table to all zeros. It is used after | |
1350 // a collection pause which used the card table to claim cards. | |
1351 void cleanUpCardTable(); | |
1352 | |
1353 // Iteration functions. | |
1354 | |
1355 // Iterate over all the ref-containing fields of all objects, calling | |
1356 // "cl.do_oop" on each. | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1357 virtual void oop_iterate(ExtendedOopClosure* cl); |
342 | 1358 |
1359 // 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
|
1360 void oop_iterate(MemRegion mr, ExtendedOopClosure* cl); |
342 | 1361 |
1362 // 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
|
1363 virtual void object_iterate(ObjectClosure* cl); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1364 |
678 | 1365 virtual void safe_object_iterate(ObjectClosure* cl) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1366 object_iterate(cl); |
678 | 1367 } |
342 | 1368 |
1369 // Iterate over all spaces in use in the heap, in ascending address order. | |
1370 virtual void space_iterate(SpaceClosure* cl); | |
1371 | |
1372 // Iterate over heap regions, in address order, terminating the | |
1373 // iteration early if the "doHeapRegion" method returns "true". | |
3766 | 1374 void heap_region_iterate(HeapRegionClosure* blk) const; |
342 | 1375 |
3766 | 1376 // 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
|
1377 HeapRegion* region_at(uint index) const { return _hrs.at(index); } |
342 | 1378 |
1379 // Divide the heap region sequence into "chunks" of some size (the number | |
1380 // of regions divided by the number of parallel threads times some | |
1381 // overpartition factor, currently 4). Assumes that this will be called | |
1382 // in parallel by ParallelGCThreads worker threads with discinct worker | |
1383 // ids in the range [0..max(ParallelGCThreads-1, 1)], that all parallel | |
1384 // calls will use the same "claim_value", and that that claim value is | |
1385 // different from the claim_value of any heap region before the start of | |
1386 // the iteration. Applies "blk->doHeapRegion" to each of the regions, by | |
1387 // attempting to claim the first region in each chunk, and, if | |
1388 // successful, applying the closure to each region in the chunk (and | |
1389 // setting the claim value of the second and subsequent regions of the | |
1390 // chunk.) For now requires that "doHeapRegion" always returns "false", | |
1391 // i.e., that a closure never attempt to abort a traversal. | |
1392 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
|
1393 uint worker, |
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4709
diff
changeset
|
1394 uint no_of_par_workers, |
342 | 1395 jint claim_value); |
1396 | |
390 | 1397 // It resets all the region claim values to the default. |
1398 void reset_heap_region_claim_values(); | |
1399 | |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
1400 // 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
|
1401 // collection set to the default. |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
1402 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
|
1403 |
355 | 1404 #ifdef ASSERT |
1405 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
|
1406 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
1407 // 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
|
1408 // current collection set. |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
1409 bool check_cset_heap_region_claim_values(jint claim_value); |
355 | 1410 #endif // ASSERT |
1411 | |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1412 // 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
|
1413 // 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
|
1414 void clear_cset_start_regions(); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1415 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
1416 // 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
|
1417 // 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
|
1418 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
|
1419 |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1420 // 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
|
1421 // HeapRegionIterator classes to calculate the starting region for |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1422 // 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
|
1423 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
|
1424 |
342 | 1425 // Iterate over the regions (if any) in the current collection set. |
1426 void collection_set_iterate(HeapRegionClosure* blk); | |
1427 | |
1428 // As above but starting from region r | |
1429 void collection_set_iterate_from(HeapRegion* r, HeapRegionClosure *blk); | |
1430 | |
1431 // Returns the first (lowest address) compactible space in the heap. | |
1432 virtual CompactibleSpace* first_compactible_space(); | |
1433 | |
1434 // A CollectedHeap will contain some number of spaces. This finds the | |
1435 // space containing a given address, or else returns NULL. | |
1436 virtual Space* space_containing(const void* addr) const; | |
1437 | |
1438 // A G1CollectedHeap will contain some number of heap regions. This | |
1439 // finds the region containing a given address, or else returns NULL. | |
3766 | 1440 template <class T> |
1441 inline HeapRegion* heap_region_containing(const T addr) const; | |
342 | 1442 |
1443 // Like the above, but requires "addr" to be in the heap (to avoid a | |
1444 // null-check), and unlike the above, may return an continuing humongous | |
1445 // region. | |
3766 | 1446 template <class T> |
1447 inline HeapRegion* heap_region_containing_raw(const T addr) const; | |
342 | 1448 |
1449 // A CollectedHeap is divided into a dense sequence of "blocks"; that is, | |
1450 // each address in the (reserved) heap is a member of exactly | |
1451 // one block. The defining characteristic of a block is that it is | |
1452 // possible to find its size, and thus to progress forward to the next | |
1453 // block. (Blocks may be of different sizes.) Thus, blocks may | |
1454 // represent Java objects, or they might be free blocks in a | |
1455 // free-list-based heap (or subheap), as long as the two kinds are | |
1456 // distinguishable and the size of each is determinable. | |
1457 | |
1458 // Returns the address of the start of the "block" that contains the | |
1459 // address "addr". We say "blocks" instead of "object" since some heaps | |
1460 // may not pack objects densely; a chunk may either be an object or a | |
1461 // non-object. | |
1462 virtual HeapWord* block_start(const void* addr) const; | |
1463 | |
1464 // Requires "addr" to be the start of a chunk, and returns its size. | |
1465 // "addr + size" is required to be the start of a new chunk, or the end | |
1466 // of the active area of the heap. | |
1467 virtual size_t block_size(const HeapWord* addr) const; | |
1468 | |
1469 // Requires "addr" to be the start of a block, and returns "TRUE" iff | |
1470 // the block is an object. | |
1471 virtual bool block_is_obj(const HeapWord* addr) const; | |
1472 | |
1473 // Does this heap support heap inspection? (+PrintClassHistogram) | |
1474 virtual bool supports_heap_inspection() const { return true; } | |
1475 | |
1476 // Section on thread-local allocation buffers (TLABs) | |
1477 // See CollectedHeap for semantics. | |
1478 | |
1479 virtual bool supports_tlab_allocation() const; | |
1480 virtual size_t tlab_capacity(Thread* thr) const; | |
1481 virtual size_t unsafe_max_tlab_alloc(Thread* thr) const; | |
1482 | |
1483 // Can a compiler initialize a new object without store barriers? | |
1484 // 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
|
1485 // 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
|
1486 // 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
|
1487 // 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
|
1488 // 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
|
1489 // 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
|
1490 // 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
|
1491 // 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
|
1492 // 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
|
1493 // 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
|
1494 // 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
|
1495 // See ReduceInitialCardMarks. |
342 | 1496 virtual bool can_elide_tlab_store_barriers() const { |
3988
246daf2c601d
7005808: G1: re-enable ReduceInitialCardMarks for G1
brutisso
parents:
3980
diff
changeset
|
1497 return true; |
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
942
diff
changeset
|
1498 } |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
942
diff
changeset
|
1499 |
1166 | 1500 virtual bool card_mark_must_follow_store() const { |
1501 return true; | |
1502 } | |
1503 | |
3766 | 1504 bool is_in_young(const oop obj) { |
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
942
diff
changeset
|
1505 HeapRegion* hr = heap_region_containing(obj); |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
942
diff
changeset
|
1506 return hr != NULL && hr->is_young(); |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
942
diff
changeset
|
1507 } |
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
942
diff
changeset
|
1508 |
3377
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3317
diff
changeset
|
1509 #ifdef ASSERT |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3317
diff
changeset
|
1510 virtual bool is_in_partial_collection(const void* p); |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3317
diff
changeset
|
1511 #endif |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3317
diff
changeset
|
1512 |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3317
diff
changeset
|
1513 virtual bool is_scavengable(const void* addr); |
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
3317
diff
changeset
|
1514 |
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
942
diff
changeset
|
1515 // 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
|
1516 // 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
|
1517 // 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
|
1518 // 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
|
1519 // information for young gen objects. |
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
942
diff
changeset
|
1520 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
|
1521 return is_in_young(new_obj); |
342 | 1522 } |
1523 | |
1524 // Returns "true" iff the given word_size is "very large". | |
1525 static bool isHumongous(size_t word_size) { | |
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1311
diff
changeset
|
1526 // 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
|
1527 // 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
|
1528 // 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
|
1529 // humongous and that we don't allocate a humongous |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1311
diff
changeset
|
1530 // object in a TLAB. |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1311
diff
changeset
|
1531 return word_size > _humongous_object_threshold_in_words; |
342 | 1532 } |
1533 | |
1534 // Update mod union table with the set of dirty cards. | |
1535 void updateModUnion(); | |
1536 | |
1537 // Set the mod union bits corresponding to the given memRegion. Note | |
1538 // that this is always a safe operation, since it doesn't clear any | |
1539 // bits. | |
1540 void markModUnionRange(MemRegion mr); | |
1541 | |
1542 // Records the fact that a marking phase is no longer in progress. | |
1543 void set_marking_complete() { | |
1544 _mark_in_progress = false; | |
1545 } | |
1546 void set_marking_started() { | |
1547 _mark_in_progress = true; | |
1548 } | |
1549 bool mark_in_progress() { | |
1550 return _mark_in_progress; | |
1551 } | |
1552 | |
1553 // Print the maximum heap capacity. | |
1554 virtual size_t max_capacity() const; | |
1555 | |
1556 virtual jlong millis_since_last_gc(); | |
1557 | |
1558 // Perform any cleanup actions necessary before allowing a verification. | |
1559 virtual void prepare_for_verify(); | |
1560 | |
1561 // Perform verification. | |
811 | 1562 |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1563 // vo == UsePrevMarking -> use "prev" marking information, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1564 // vo == UseNextMarking -> use "next" marking information |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1565 // vo == UseMarkWord -> use the mark word in the object header |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1566 // |
811 | 1567 // NOTE: Only the "prev" marking information is guaranteed to be |
1568 // 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
|
1569 // vo == UsePrevMarking. |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1570 // 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
|
1571 // vo == UseNextMarking, which is to verify the "next" marking |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1572 // information at the end of remark. |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1573 // 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
|
1574 // vo == UseMarkWord, which is to verify the marking during a |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1575 // full GC. |
6008 | 1576 void verify(bool silent, VerifyOption vo); |
811 | 1577 |
1578 // Override; it uses the "prev" marking information | |
6008 | 1579 virtual void verify(bool silent); |
10405 | 1580 |
342 | 1581 virtual void print_on(outputStream* st) const; |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
1582 virtual void print_extended_on(outputStream* st) const; |
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8853
diff
changeset
|
1583 virtual void print_on_error(outputStream* st) const; |
342 | 1584 |
1585 virtual void print_gc_threads_on(outputStream* st) const; | |
1586 virtual void gc_threads_do(ThreadClosure* tc) const; | |
1587 | |
1588 // Override | |
1589 void print_tracing_info() const; | |
1590 | |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
1591 // 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
|
1592 void print_cset_rsets() PRODUCT_RETURN; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
1593 void print_all_rsets() PRODUCT_RETURN; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
1594 |
342 | 1595 // Convenience function to be used in situations where the heap type can be |
1596 // asserted to be this type. | |
1597 static G1CollectedHeap* heap(); | |
1598 | |
1599 void set_region_short_lived_locked(HeapRegion* hr); | |
1600 // add appropriate methods for any other surv rate groups | |
1601 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1602 YoungList* young_list() { return _young_list; } |
342 | 1603 |
1604 // debugging | |
1605 bool check_young_list_well_formed() { | |
1606 return _young_list->check_list_well_formed(); | |
1607 } | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1608 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1609 bool check_young_list_empty(bool check_heap, |
342 | 1610 bool check_sample = true); |
1611 | |
1612 // *** Stuff related to concurrent marking. It's not clear to me that so | |
1613 // many of these need to be public. | |
1614 | |
1615 // The functions below are helper functions that a subclass of | |
1616 // "CollectedHeap" can use in the implementation of its virtual | |
1617 // functions. | |
1618 // This performs a concurrent marking of the live objects in a | |
1619 // bitmap off to the side. | |
1620 void doConcurrentMark(); | |
1621 | |
1622 bool isMarkedPrev(oop obj) const; | |
1623 bool isMarkedNext(oop obj) const; | |
1624 | |
1625 // Determine if an object is dead, given the object and also | |
1626 // the region to which the object belongs. An object is dead | |
1627 // iff a) it was not allocated since the last mark and b) it | |
1628 // is not marked. | |
1629 | |
1630 bool is_obj_dead(const oop obj, const HeapRegion* hr) const { | |
1631 return | |
1632 !hr->obj_allocated_since_prev_marking(obj) && | |
1633 !isMarkedPrev(obj); | |
1634 } | |
1635 | |
1636 // This function returns true when an object has been | |
1637 // around since the previous marking and hasn't yet | |
1638 // been marked during this marking. | |
1639 | |
1640 bool is_obj_ill(const oop obj, const HeapRegion* hr) const { | |
1641 return | |
1642 !hr->obj_allocated_since_next_marking(obj) && | |
1643 !isMarkedNext(obj); | |
1644 } | |
1645 | |
1646 // Determine if an object is dead, given only the object itself. | |
1647 // This will find the region to which the object belongs and | |
1648 // then call the region version of the same function. | |
1649 | |
1650 // Added if it is NULL it isn't dead. | |
1651 | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1652 bool is_obj_dead(const oop obj) const { |
811 | 1653 const HeapRegion* hr = heap_region_containing(obj); |
342 | 1654 if (hr == NULL) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1655 if (obj == NULL) return false; |
342 | 1656 else return true; |
1657 } | |
1658 else return is_obj_dead(obj, hr); | |
1659 } | |
1660 | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1661 bool is_obj_ill(const oop obj) const { |
811 | 1662 const HeapRegion* hr = heap_region_containing(obj); |
342 | 1663 if (hr == NULL) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
1664 if (obj == NULL) return false; |
342 | 1665 else return true; |
1666 } | |
1667 else return is_obj_ill(obj, hr); | |
1668 } | |
1669 | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1670 // 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
|
1671 // appropriate method depending on value of the given VerifyOption |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1672 // parameter. The options for that parameter are: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1673 // |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1674 // vo == UsePrevMarking -> use "prev" marking information, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1675 // vo == UseNextMarking -> use "next" marking information, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1676 // vo == UseMarkWord -> use mark word from object header |
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 HeapRegion* hr, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1680 const VerifyOption vo) const { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1681 switch (vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1682 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1683 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1684 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1685 default: ShouldNotReachHere(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1686 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1687 return false; // keep some compilers happy |
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 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1690 bool is_obj_dead_cond(const oop obj, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1691 const VerifyOption vo) const { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1692 switch (vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1693 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1694 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1695 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1696 default: ShouldNotReachHere(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1697 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1698 return false; // keep some compilers happy |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1699 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1700 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1701 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
|
1702 HeapWord* top_at_mark_start(HeapRegion* hr, VerifyOption vo); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1703 bool is_marked(oop obj, VerifyOption vo); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1704 const char* top_at_mark_start_str(VerifyOption vo); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6197
diff
changeset
|
1705 |
342 | 1706 // The following is just to alert the verification code |
1707 // that a full collection has occurred and that the | |
1708 // remembered sets are no longer up to date. | |
1709 bool _full_collection; | |
1710 void set_full_collection() { _full_collection = true;} | |
1711 void clear_full_collection() {_full_collection = false;} | |
1712 bool full_collection() {return _full_collection;} | |
1713 | |
1714 ConcurrentMark* concurrent_mark() const { return _cm; } | |
1715 ConcurrentG1Refine* concurrent_g1_refine() const { return _cg1r; } | |
1716 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
678
diff
changeset
|
1717 // 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
|
1718 // 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
|
1719 // remembered set scanning and drained during the card table |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
678
diff
changeset
|
1720 // cleanup. Although the methods are reentrant, population/draining |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
678
diff
changeset
|
1721 // phases must not overlap. For synchronization purposes the last |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
678
diff
changeset
|
1722 // element on the list points to itself. |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
678
diff
changeset
|
1723 HeapRegion* _dirty_cards_region_list; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
678
diff
changeset
|
1724 void push_dirty_cards_region(HeapRegion* hr); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
678
diff
changeset
|
1725 HeapRegion* pop_dirty_cards_region(); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
678
diff
changeset
|
1726 |
342 | 1727 public: |
1728 void stop_conc_gc_threads(); | |
1729 | |
1730 size_t pending_card_num(); | |
1731 size_t cards_scanned(); | |
1732 | |
1733 protected: | |
1734 size_t _max_heap_capacity; | |
1735 }; | |
1736 | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1737 class G1ParGCAllocBuffer: public ParGCAllocBuffer { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1738 private: |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1739 bool _retired; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1740 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1741 public: |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3867
diff
changeset
|
1742 G1ParGCAllocBuffer(size_t gclab_word_size); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1743 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
1744 void set_buf(HeapWord* buf) { |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1745 ParGCAllocBuffer::set_buf(buf); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1746 _retired = false; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1747 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1748 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
1749 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
|
1750 if (_retired) |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1751 return; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1752 ParGCAllocBuffer::retire(end_of_gc, retain); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1753 _retired = true; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1754 } |
10374
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1755 |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1756 bool is_retired() { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1757 return _retired; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1758 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1759 }; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1760 |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1761 class G1ParGCAllocBufferContainer { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1762 protected: |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1763 static int const _priority_max = 2; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1764 G1ParGCAllocBuffer* _priority_buffer[_priority_max]; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1765 |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1766 public: |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1767 G1ParGCAllocBufferContainer(size_t gclab_word_size) { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1768 for (int pr = 0; pr < _priority_max; ++pr) { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1769 _priority_buffer[pr] = new G1ParGCAllocBuffer(gclab_word_size); |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1770 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1771 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1772 |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1773 ~G1ParGCAllocBufferContainer() { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1774 for (int pr = 0; pr < _priority_max; ++pr) { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1775 assert(_priority_buffer[pr]->is_retired(), "alloc buffers should all retire at this point."); |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1776 delete _priority_buffer[pr]; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1777 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1778 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1779 |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1780 HeapWord* allocate(size_t word_sz) { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1781 HeapWord* obj; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1782 for (int pr = 0; pr < _priority_max; ++pr) { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1783 obj = _priority_buffer[pr]->allocate(word_sz); |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1784 if (obj != NULL) return obj; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1785 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1786 return obj; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1787 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1788 |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1789 bool contains(void* addr) { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1790 for (int pr = 0; pr < _priority_max; ++pr) { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1791 if (_priority_buffer[pr]->contains(addr)) return true; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1792 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1793 return false; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1794 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1795 |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1796 void undo_allocation(HeapWord* obj, size_t word_sz) { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1797 bool finish_undo; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1798 for (int pr = 0; pr < _priority_max; ++pr) { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1799 if (_priority_buffer[pr]->contains(obj)) { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1800 _priority_buffer[pr]->undo_allocation(obj, word_sz); |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1801 finish_undo = true; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1802 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1803 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1804 if (!finish_undo) ShouldNotReachHere(); |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1805 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1806 |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1807 size_t words_remaining() { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1808 size_t result = 0; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1809 for (int pr = 0; pr < _priority_max; ++pr) { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1810 result += _priority_buffer[pr]->words_remaining(); |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1811 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1812 return result; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1813 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1814 |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1815 size_t words_remaining_in_retired_buffer() { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1816 G1ParGCAllocBuffer* retired = _priority_buffer[0]; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1817 return retired->words_remaining(); |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1818 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1819 |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1820 void flush_stats_and_retire(PLABStats* stats, bool end_of_gc, bool retain) { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1821 for (int pr = 0; pr < _priority_max; ++pr) { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1822 _priority_buffer[pr]->flush_stats_and_retire(stats, end_of_gc, retain); |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1823 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1824 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1825 |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1826 void update(bool end_of_gc, bool retain, HeapWord* buf, size_t word_sz) { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1827 G1ParGCAllocBuffer* retired_and_set = _priority_buffer[0]; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1828 retired_and_set->retire(end_of_gc, retain); |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1829 retired_and_set->set_buf(buf); |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1830 retired_and_set->set_word_size(word_sz); |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1831 adjust_priority_order(); |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1832 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1833 |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1834 private: |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1835 void adjust_priority_order() { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1836 G1ParGCAllocBuffer* retired_and_set = _priority_buffer[0]; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1837 |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1838 int last = _priority_max - 1; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1839 for (int pr = 0; pr < last; ++pr) { |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1840 _priority_buffer[pr] = _priority_buffer[pr + 1]; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1841 } |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1842 _priority_buffer[last] = retired_and_set; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1843 } |
845
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 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1846 class G1ParScanThreadState : public StackObj { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1847 protected: |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1848 G1CollectedHeap* _g1h; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1849 RefToScanQueue* _refs; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1850 DirtyCardQueue _dcq; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1851 CardTableModRefBS* _ct_bs; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1852 G1RemSet* _g1_rem; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1853 |
10374
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1854 G1ParGCAllocBufferContainer _surviving_alloc_buffer; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1855 G1ParGCAllocBufferContainer _tenured_alloc_buffer; |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1856 G1ParGCAllocBufferContainer* _alloc_buffers[GCAllocPurposeCount]; |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
1857 ageTable _age_table; |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1858 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1859 size_t _alloc_buffer_waste; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1860 size_t _undo_waste; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1861 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1862 OopsInHeapRegionClosure* _evac_failure_cl; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1863 G1ParScanHeapEvacClosure* _evac_cl; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1864 G1ParScanPartialArrayClosure* _partial_scan_cl; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1865 |
10405 | 1866 int _hash_seed; |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4829
diff
changeset
|
1867 uint _queue_num; |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1868 |
1611 | 1869 size_t _term_attempts; |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1870 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1871 double _start; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1872 double _start_strong_roots; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1873 double _strong_roots_time; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1874 double _start_term; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1875 double _term_time; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1876 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1877 // 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
|
1878 // 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
|
1879 size_t* _surviving_young_words_base; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1880 // 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
|
1881 size_t* _surviving_young_words; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1882 |
1709 | 1883 #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
|
1884 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1885 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
|
1886 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1887 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
|
1888 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1889 DirtyCardQueue& dirty_card_queue() { return _dcq; } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1890 CardTableModRefBS* ctbs() { return _ct_bs; } |
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 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
|
1893 if (!from->is_survivor()) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1894 _g1_rem->par_write_ref(from, p, tid); |
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 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1898 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
|
1899 // 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
|
1900 // 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
|
1901 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
|
1902 size_t card_index = ctbs()->index_for(p); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1903 // 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
|
1904 if (ctbs()->mark_card_deferred(card_index)) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1905 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
|
1906 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1907 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1908 } |
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 public: |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4829
diff
changeset
|
1911 G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1912 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1913 ~G1ParScanThreadState() { |
6197 | 1914 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
|
1915 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1916 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1917 RefToScanQueue* refs() { return _refs; } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1918 ageTable* age_table() { return &_age_table; } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1919 |
10374
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1920 G1ParGCAllocBufferContainer* alloc_buffer(GCAllocPurpose purpose) { |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
1921 return _alloc_buffers[purpose]; |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1922 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1923 |
1709 | 1924 size_t alloc_buffer_waste() const { return _alloc_buffer_waste; } |
1925 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
|
1926 |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1927 #ifdef ASSERT |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1928 bool verify_ref(narrowOop* ref) const; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1929 bool verify_ref(oop* ref) const; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1930 bool verify_task(StarTask ref) const; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1931 #endif // ASSERT |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1932 |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1933 template <class T> void push_on_queue(T* ref) { |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
1934 assert(verify_ref(ref), "sanity"); |
1709 | 1935 refs()->push(ref); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1936 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1937 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1938 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
|
1939 if (G1DeferredRSUpdate) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1940 deferred_rs_update(from, p, tid); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1941 } else { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1942 immediate_rs_update(from, p, tid); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1943 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1944 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1945 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1946 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
|
1947 HeapWord* obj = NULL; |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
1948 size_t gclab_word_size = _g1h->desired_plab_sz(purpose); |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
1949 if (word_sz * 100 < gclab_word_size * ParallelGCBufferWastePct) { |
10374
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1950 G1ParGCAllocBufferContainer* alloc_buf = alloc_buffer(purpose); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1951 |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
1952 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
|
1953 if (buf == NULL) return NULL; // Let caller handle allocation failure. |
10374
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1954 |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1955 add_to_alloc_buffer_waste(alloc_buf->words_remaining_in_retired_buffer()); |
87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
tamao
parents:
10327
diff
changeset
|
1956 alloc_buf->update(false /* end_of_gc */, false /* retain */, buf, gclab_word_size); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1957 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1958 obj = alloc_buf->allocate(word_sz); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1959 assert(obj != NULL, "buffer was definitely big enough..."); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1960 } else { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1961 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
|
1962 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1963 return obj; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1964 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1965 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1966 HeapWord* allocate(GCAllocPurpose purpose, size_t word_sz) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1967 HeapWord* obj = alloc_buffer(purpose)->allocate(word_sz); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1968 if (obj != NULL) return obj; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1969 return allocate_slow(purpose, word_sz); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1970 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1971 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1972 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
|
1973 if (alloc_buffer(purpose)->contains(obj)) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1974 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
|
1975 "should contain whole object"); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1976 alloc_buffer(purpose)->undo_allocation(obj, word_sz); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1977 } else { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1978 CollectedHeap::fill_with_object(obj, word_sz); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1979 add_to_undo_waste(word_sz); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1980 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1981 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1982 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1983 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
|
1984 _evac_failure_cl = evac_failure_cl; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1985 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1986 OopsInHeapRegionClosure* evac_failure_closure() { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1987 return _evac_failure_cl; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1988 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1989 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1990 void set_evac_closure(G1ParScanHeapEvacClosure* evac_cl) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1991 _evac_cl = evac_cl; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1992 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1993 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1994 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
|
1995 _partial_scan_cl = partial_scan_cl; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1996 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1997 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
1998 int* hash_seed() { return &_hash_seed; } |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4829
diff
changeset
|
1999 uint queue_num() { return _queue_num; } |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2000 |
1709 | 2001 size_t term_attempts() const { return _term_attempts; } |
1611 | 2002 void note_term_attempt() { _term_attempts++; } |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2003 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2004 void start_strong_roots() { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2005 _start_strong_roots = os::elapsedTime(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2006 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2007 void end_strong_roots() { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2008 _strong_roots_time += (os::elapsedTime() - _start_strong_roots); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2009 } |
1709 | 2010 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
|
2011 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2012 void start_term_time() { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2013 note_term_attempt(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2014 _start_term = os::elapsedTime(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2015 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2016 void end_term_time() { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2017 _term_time += (os::elapsedTime() - _start_term); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2018 } |
1709 | 2019 double term_time() const { return _term_time; } |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2020 |
1709 | 2021 double elapsed_time() const { |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2022 return os::elapsedTime() - _start; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2023 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2024 |
1709 | 2025 static void |
2026 print_termination_stats_hdr(outputStream* const st = gclog_or_tty); | |
2027 void | |
2028 print_termination_stats(int i, outputStream* const st = gclog_or_tty) const; | |
2029 | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2030 size_t* surviving_young_words() { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2031 // 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
|
2032 // age -1 regions (i.e. non-young ones) |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2033 return _surviving_young_words; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2034 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2035 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2036 void retire_alloc_buffers() { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2037 for (int ap = 0; ap < GCAllocPurposeCount; ++ap) { |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1313
diff
changeset
|
2038 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
|
2039 add_to_alloc_buffer_waste(waste); |
6595 | 2040 _alloc_buffers[ap]->flush_stats_and_retire(_g1h->stats_for_purpose((GCAllocPurpose)ap), |
2041 true /* end_of_gc */, | |
2042 false /* retain */); | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2043 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2044 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2045 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2046 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
|
2047 if (has_partial_array_mask(ref_to_scan)) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2048 _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
|
2049 } else { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2050 // 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
|
2051 // "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
|
2052 // humongous region. |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2053 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
|
2054 _evac_cl->set_region(r); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2055 _evac_cl->do_oop_nv(ref_to_scan); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2056 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2057 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2058 |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
2059 void deal_with_reference(StarTask ref) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
2060 assert(verify_task(ref), "sanity"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
2061 if (ref.is_narrow()) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
2062 deal_with_reference((narrowOop*)ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
2063 } else { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
2064 deal_with_reference((oop*)ref); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2065 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2066 } |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
2067 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1836
diff
changeset
|
2068 void trim_queue(); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2069 }; |
1972 | 2070 |
2071 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_HPP |