Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/parallelScavenge/psCompactionManager.cpp @ 5964:21595f05bc93
7146246: G1: expose some of the -XX flags that drive which old regions to collect during mixed GCs
Summary: Make two G1 cmd line flags available in product builds: G1HeapWastePercent (previously called: G1OldReclaimableThresholdPercent) and G1MixedGCCountTarget (previous called: G1MaxMixedGCNum). Also changed the default of the former from 1% to 5% and the default for G1OldCSetRegionLiveThresholdPercent to 90%.
Reviewed-by: azeemj, jwilhelm, johnc
author | tonyp |
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date | Fri, 23 Mar 2012 10:53:19 -0400 |
parents | 7913e93dca52 |
children | d2a62e0f25eb |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2005, 2011, 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "gc_implementation/parallelScavenge/gcTaskManager.hpp" | |
28 #include "gc_implementation/parallelScavenge/objectStartArray.hpp" | |
29 #include "gc_implementation/parallelScavenge/parMarkBitMap.hpp" | |
30 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" | |
31 #include "gc_implementation/parallelScavenge/psCompactionManager.hpp" | |
32 #include "gc_implementation/parallelScavenge/psOldGen.hpp" | |
33 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp" | |
34 #include "oops/objArrayKlass.inline.hpp" | |
35 #include "oops/oop.hpp" | |
36 #include "oops/oop.inline.hpp" | |
37 #include "oops/oop.pcgc.inline.hpp" | |
38 #include "utilities/stack.inline.hpp" | |
0 | 39 |
40 PSOldGen* ParCompactionManager::_old_gen = NULL; | |
41 ParCompactionManager** ParCompactionManager::_manager_array = NULL; | |
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42 |
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43 RegionTaskQueue** ParCompactionManager::_region_list = NULL; |
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44 |
0 | 45 OopTaskQueueSet* ParCompactionManager::_stack_array = NULL; |
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46 ParCompactionManager::ObjArrayTaskQueueSet* |
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47 ParCompactionManager::_objarray_queues = NULL; |
0 | 48 ObjectStartArray* ParCompactionManager::_start_array = NULL; |
49 ParMarkBitMap* ParCompactionManager::_mark_bitmap = NULL; | |
1638 | 50 RegionTaskQueueSet* ParCompactionManager::_region_array = NULL; |
0 | 51 |
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52 uint* ParCompactionManager::_recycled_stack_index = NULL; |
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53 int ParCompactionManager::_recycled_top = -1; |
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54 int ParCompactionManager::_recycled_bottom = -1; |
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55 |
0 | 56 ParCompactionManager::ParCompactionManager() : |
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57 _action(CopyAndUpdate), |
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58 _region_stack(NULL), |
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59 _region_stack_index((uint)max_uintx) { |
0 | 60 |
61 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); | |
62 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
63 | |
64 _old_gen = heap->old_gen(); | |
65 _start_array = old_gen()->start_array(); | |
66 | |
67 marking_stack()->initialize(); | |
1638 | 68 _objarray_stack.initialize(); |
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69 } |
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70 |
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71 ParCompactionManager::~ParCompactionManager() { |
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72 delete _recycled_stack_index; |
0 | 73 } |
74 | |
75 void ParCompactionManager::initialize(ParMarkBitMap* mbm) { | |
76 assert(PSParallelCompact::gc_task_manager() != NULL, | |
77 "Needed for initialization"); | |
78 | |
79 _mark_bitmap = mbm; | |
80 | |
81 uint parallel_gc_threads = PSParallelCompact::gc_task_manager()->workers(); | |
82 | |
83 assert(_manager_array == NULL, "Attempt to initialize twice"); | |
84 _manager_array = NEW_C_HEAP_ARRAY(ParCompactionManager*, parallel_gc_threads+1 ); | |
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85 guarantee(_manager_array != NULL, "Could not allocate manager_array"); |
0 | 86 |
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87 _region_list = NEW_C_HEAP_ARRAY(RegionTaskQueue*, |
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88 parallel_gc_threads+1); |
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89 guarantee(_region_list != NULL, "Could not initialize promotion manager"); |
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90 |
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91 _recycled_stack_index = NEW_C_HEAP_ARRAY(uint, parallel_gc_threads); |
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92 |
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93 // parallel_gc-threads + 1 to be consistent with the number of |
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94 // compaction managers. |
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95 for(uint i=0; i<parallel_gc_threads + 1; i++) { |
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96 _region_list[i] = new RegionTaskQueue(); |
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97 region_list(i)->initialize(); |
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98 } |
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99 |
0 | 100 _stack_array = new OopTaskQueueSet(parallel_gc_threads); |
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101 guarantee(_stack_array != NULL, "Could not allocate stack_array"); |
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102 _objarray_queues = new ObjArrayTaskQueueSet(parallel_gc_threads); |
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103 guarantee(_objarray_queues != NULL, "Could not allocate objarray_queues"); |
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104 _region_array = new RegionTaskQueueSet(parallel_gc_threads); |
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105 guarantee(_region_array != NULL, "Could not allocate region_array"); |
0 | 106 |
107 // Create and register the ParCompactionManager(s) for the worker threads. | |
108 for(uint i=0; i<parallel_gc_threads; i++) { | |
109 _manager_array[i] = new ParCompactionManager(); | |
110 guarantee(_manager_array[i] != NULL, "Could not create ParCompactionManager"); | |
111 stack_array()->register_queue(i, _manager_array[i]->marking_stack()); | |
1638 | 112 _objarray_queues->register_queue(i, &_manager_array[i]->_objarray_stack); |
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113 region_array()->register_queue(i, region_list(i)); |
0 | 114 } |
115 | |
116 // The VMThread gets its own ParCompactionManager, which is not available | |
117 // for work stealing. | |
118 _manager_array[parallel_gc_threads] = new ParCompactionManager(); | |
119 guarantee(_manager_array[parallel_gc_threads] != NULL, | |
120 "Could not create ParCompactionManager"); | |
121 assert(PSParallelCompact::gc_task_manager()->workers() != 0, | |
122 "Not initialized?"); | |
123 } | |
124 | |
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125 int ParCompactionManager::pop_recycled_stack_index() { |
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126 assert(_recycled_bottom <= _recycled_top, "list is empty"); |
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127 // Get the next available index |
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128 if (_recycled_bottom < _recycled_top) { |
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129 uint cur, next, last; |
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130 do { |
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131 cur = _recycled_bottom; |
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132 next = cur + 1; |
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133 last = Atomic::cmpxchg(next, &_recycled_bottom, cur); |
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134 } while (cur != last); |
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135 return _recycled_stack_index[next]; |
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136 } else { |
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137 return -1; |
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138 } |
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139 } |
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140 |
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141 void ParCompactionManager::push_recycled_stack_index(uint v) { |
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142 // Get the next available index |
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143 int cur = Atomic::add(1, &_recycled_top); |
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144 _recycled_stack_index[cur] = v; |
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145 assert(_recycled_bottom <= _recycled_top, "list top and bottom are wrong"); |
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146 } |
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147 |
0 | 148 bool ParCompactionManager::should_update() { |
149 assert(action() != NotValid, "Action is not set"); | |
150 return (action() == ParCompactionManager::Update) || | |
151 (action() == ParCompactionManager::CopyAndUpdate) || | |
152 (action() == ParCompactionManager::UpdateAndCopy); | |
153 } | |
154 | |
155 bool ParCompactionManager::should_copy() { | |
156 assert(action() != NotValid, "Action is not set"); | |
157 return (action() == ParCompactionManager::Copy) || | |
158 (action() == ParCompactionManager::CopyAndUpdate) || | |
159 (action() == ParCompactionManager::UpdateAndCopy); | |
160 } | |
161 | |
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162 void ParCompactionManager::region_list_push(uint list_index, |
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163 size_t region_index) { |
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164 region_list(list_index)->push(region_index); |
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165 } |
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166 |
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167 void ParCompactionManager::verify_region_list_empty(uint list_index) { |
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168 assert(region_list(list_index)->is_empty(), "Not empty"); |
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169 } |
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170 |
0 | 171 ParCompactionManager* |
172 ParCompactionManager::gc_thread_compaction_manager(int index) { | |
173 assert(index >= 0 && index < (int)ParallelGCThreads, "index out of range"); | |
174 assert(_manager_array != NULL, "Sanity"); | |
175 return _manager_array[index]; | |
176 } | |
177 | |
178 void ParCompactionManager::reset() { | |
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179 for(uint i = 0; i < ParallelGCThreads + 1; i++) { |
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180 assert(manager_array(i)->revisit_klass_stack()->is_empty(), "sanity"); |
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181 assert(manager_array(i)->revisit_mdo_stack()->is_empty(), "sanity"); |
0 | 182 } |
183 } | |
184 | |
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185 void ParCompactionManager::follow_marking_stacks() { |
0 | 186 do { |
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187 // Drain the overflow stack first, to allow stealing from the marking stack. |
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188 oop obj; |
1638 | 189 while (marking_stack()->pop_overflow(obj)) { |
190 obj->follow_contents(this); | |
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191 } |
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192 while (marking_stack()->pop_local(obj)) { |
0 | 193 obj->follow_contents(this); |
194 } | |
195 | |
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196 // Process ObjArrays one at a time to avoid marking stack bloat. |
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197 ObjArrayTask task; |
1638 | 198 if (_objarray_stack.pop_overflow(task)) { |
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199 objArrayKlass* const k = (objArrayKlass*)task.obj()->blueprint(); |
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200 k->oop_follow_contents(this, task.obj(), task.index()); |
1638 | 201 } else if (_objarray_stack.pop_local(task)) { |
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202 objArrayKlass* const k = (objArrayKlass*)task.obj()->blueprint(); |
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203 k->oop_follow_contents(this, task.obj(), task.index()); |
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204 } |
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205 } while (!marking_stacks_empty()); |
0 | 206 |
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207 assert(marking_stacks_empty(), "Sanity"); |
0 | 208 } |
209 | |
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210 void ParCompactionManager::drain_region_stacks() { |
0 | 211 do { |
1638 | 212 // Drain overflow stack first so other threads can steal. |
213 size_t region_index; | |
214 while (region_stack()->pop_overflow(region_index)) { | |
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6725697: par compact - rename class ChunkData to RegionData
jcoomes
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215 PSParallelCompact::fill_and_update_region(this, region_index); |
0 | 216 } |
217 | |
1638 | 218 while (region_stack()->pop_local(region_index)) { |
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81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
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219 PSParallelCompact::fill_and_update_region(this, region_index); |
0 | 220 } |
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81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
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diff
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221 } while (!region_stack()->is_empty()); |
0 | 222 } |