Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/psCompactionManager.cpp @ 1763:d6f45b55c972
4809552: Optimize Arrays.fill(...)
Reviewed-by: kvn
author | never |
---|---|
date | Fri, 27 Aug 2010 17:33:49 -0700 |
parents | b2a00dd3117c |
children | 894b1d7c7e01 |
rev | line source |
---|---|
0 | 1 /* |
1638 | 2 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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:
1315
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1315
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:
1315
diff
changeset
|
21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_psCompactionManager.cpp.incl" | |
27 | |
28 PSOldGen* ParCompactionManager::_old_gen = NULL; | |
29 ParCompactionManager** ParCompactionManager::_manager_array = NULL; | |
30 OopTaskQueueSet* ParCompactionManager::_stack_array = NULL; | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
31 ParCompactionManager::ObjArrayTaskQueueSet* |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
32 ParCompactionManager::_objarray_queues = NULL; |
0 | 33 ObjectStartArray* ParCompactionManager::_start_array = NULL; |
34 ParMarkBitMap* ParCompactionManager::_mark_bitmap = NULL; | |
1638 | 35 RegionTaskQueueSet* ParCompactionManager::_region_array = NULL; |
0 | 36 |
37 ParCompactionManager::ParCompactionManager() : | |
38 _action(CopyAndUpdate) { | |
39 | |
40 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); | |
41 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
42 | |
43 _old_gen = heap->old_gen(); | |
44 _start_array = old_gen()->start_array(); | |
45 | |
46 marking_stack()->initialize(); | |
1638 | 47 _objarray_stack.initialize(); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
0
diff
changeset
|
48 region_stack()->initialize(); |
0 | 49 |
50 // Note that _revisit_klass_stack is allocated out of the | |
51 // C heap (as opposed to out of ResourceArena). | |
52 int size = | |
53 (SystemDictionary::number_of_classes() * 2) * 2 / ParallelGCThreads; | |
54 _revisit_klass_stack = new (ResourceObj::C_HEAP) GrowableArray<Klass*>(size, true); | |
941 | 55 // From some experiments (#klass/k)^2 for k = 10 seems a better fit, but this will |
56 // have to do for now until we are able to investigate a more optimal setting. | |
57 _revisit_mdo_stack = new (ResourceObj::C_HEAP) GrowableArray<DataLayout*>(size*2, true); | |
0 | 58 } |
59 | |
60 ParCompactionManager::~ParCompactionManager() { | |
61 delete _revisit_klass_stack; | |
941 | 62 delete _revisit_mdo_stack; |
0 | 63 // _manager_array and _stack_array are statics |
64 // shared with all instances of ParCompactionManager | |
65 // should not be deallocated. | |
66 } | |
67 | |
68 void ParCompactionManager::initialize(ParMarkBitMap* mbm) { | |
69 assert(PSParallelCompact::gc_task_manager() != NULL, | |
70 "Needed for initialization"); | |
71 | |
72 _mark_bitmap = mbm; | |
73 | |
74 uint parallel_gc_threads = PSParallelCompact::gc_task_manager()->workers(); | |
75 | |
76 assert(_manager_array == NULL, "Attempt to initialize twice"); | |
77 _manager_array = NEW_C_HEAP_ARRAY(ParCompactionManager*, parallel_gc_threads+1 ); | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
78 guarantee(_manager_array != NULL, "Could not allocate manager_array"); |
0 | 79 |
80 _stack_array = new OopTaskQueueSet(parallel_gc_threads); | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
81 guarantee(_stack_array != NULL, "Could not allocate stack_array"); |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
82 _objarray_queues = new ObjArrayTaskQueueSet(parallel_gc_threads); |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
83 guarantee(_objarray_queues != NULL, "Could not allocate objarray_queues"); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
0
diff
changeset
|
84 _region_array = new RegionTaskQueueSet(parallel_gc_threads); |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
85 guarantee(_region_array != NULL, "Could not allocate region_array"); |
0 | 86 |
87 // Create and register the ParCompactionManager(s) for the worker threads. | |
88 for(uint i=0; i<parallel_gc_threads; i++) { | |
89 _manager_array[i] = new ParCompactionManager(); | |
90 guarantee(_manager_array[i] != NULL, "Could not create ParCompactionManager"); | |
91 stack_array()->register_queue(i, _manager_array[i]->marking_stack()); | |
1638 | 92 _objarray_queues->register_queue(i, &_manager_array[i]->_objarray_stack); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
0
diff
changeset
|
93 region_array()->register_queue(i, _manager_array[i]->region_stack()); |
0 | 94 } |
95 | |
96 // The VMThread gets its own ParCompactionManager, which is not available | |
97 // for work stealing. | |
98 _manager_array[parallel_gc_threads] = new ParCompactionManager(); | |
99 guarantee(_manager_array[parallel_gc_threads] != NULL, | |
100 "Could not create ParCompactionManager"); | |
101 assert(PSParallelCompact::gc_task_manager()->workers() != 0, | |
102 "Not initialized?"); | |
103 } | |
104 | |
105 bool ParCompactionManager::should_update() { | |
106 assert(action() != NotValid, "Action is not set"); | |
107 return (action() == ParCompactionManager::Update) || | |
108 (action() == ParCompactionManager::CopyAndUpdate) || | |
109 (action() == ParCompactionManager::UpdateAndCopy); | |
110 } | |
111 | |
112 bool ParCompactionManager::should_copy() { | |
113 assert(action() != NotValid, "Action is not set"); | |
114 return (action() == ParCompactionManager::Copy) || | |
115 (action() == ParCompactionManager::CopyAndUpdate) || | |
116 (action() == ParCompactionManager::UpdateAndCopy); | |
117 } | |
118 | |
119 bool ParCompactionManager::should_verify_only() { | |
120 assert(action() != NotValid, "Action is not set"); | |
121 return action() == ParCompactionManager::VerifyUpdate; | |
122 } | |
123 | |
124 bool ParCompactionManager::should_reset_only() { | |
125 assert(action() != NotValid, "Action is not set"); | |
126 return action() == ParCompactionManager::ResetObjects; | |
127 } | |
128 | |
129 ParCompactionManager* | |
130 ParCompactionManager::gc_thread_compaction_manager(int index) { | |
131 assert(index >= 0 && index < (int)ParallelGCThreads, "index out of range"); | |
132 assert(_manager_array != NULL, "Sanity"); | |
133 return _manager_array[index]; | |
134 } | |
135 | |
136 void ParCompactionManager::reset() { | |
137 for(uint i=0; i<ParallelGCThreads+1; i++) { | |
138 manager_array(i)->revisit_klass_stack()->clear(); | |
941 | 139 manager_array(i)->revisit_mdo_stack()->clear(); |
0 | 140 } |
141 } | |
142 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
143 void ParCompactionManager::follow_marking_stacks() { |
0 | 144 do { |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
145 // Drain the overflow stack first, to allow stealing from the marking stack. |
1315
c385bf94cfb8
6935839: excessive marking stack growth during full gcs
jcoomes
parents:
1311
diff
changeset
|
146 oop obj; |
1638 | 147 while (marking_stack()->pop_overflow(obj)) { |
148 obj->follow_contents(this); | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
149 } |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
150 while (marking_stack()->pop_local(obj)) { |
0 | 151 obj->follow_contents(this); |
152 } | |
153 | |
1315
c385bf94cfb8
6935839: excessive marking stack growth during full gcs
jcoomes
parents:
1311
diff
changeset
|
154 // Process ObjArrays one at a time to avoid marking stack bloat. |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
155 ObjArrayTask task; |
1638 | 156 if (_objarray_stack.pop_overflow(task)) { |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
157 objArrayKlass* const k = (objArrayKlass*)task.obj()->blueprint(); |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
158 k->oop_follow_contents(this, task.obj(), task.index()); |
1638 | 159 } else if (_objarray_stack.pop_local(task)) { |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
160 objArrayKlass* const k = (objArrayKlass*)task.obj()->blueprint(); |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
161 k->oop_follow_contents(this, task.obj(), task.index()); |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
162 } |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
163 } while (!marking_stacks_empty()); |
0 | 164 |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
948
diff
changeset
|
165 assert(marking_stacks_empty(), "Sanity"); |
0 | 166 } |
167 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
0
diff
changeset
|
168 void ParCompactionManager::drain_region_stacks() { |
0 | 169 do { |
1638 | 170 // Drain overflow stack first so other threads can steal. |
171 size_t region_index; | |
172 while (region_stack()->pop_overflow(region_index)) { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
0
diff
changeset
|
173 PSParallelCompact::fill_and_update_region(this, region_index); |
0 | 174 } |
175 | |
1638 | 176 while (region_stack()->pop_local(region_index)) { |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
0
diff
changeset
|
177 PSParallelCompact::fill_and_update_region(this, region_index); |
0 | 178 } |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
0
diff
changeset
|
179 } while (!region_stack()->is_empty()); |
0 | 180 } |
181 | |
182 #ifdef ASSERT | |
183 bool ParCompactionManager::stacks_have_been_allocated() { | |
941 | 184 return (revisit_klass_stack()->data_addr() != NULL && |
185 revisit_mdo_stack()->data_addr() != NULL); | |
0 | 186 } |
187 #endif |