Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/parallelScavenge/psTasks.cpp @ 4095:bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
Summary: Select number of GC threads dynamically based on heap usage and number of Java threads
Reviewed-by: johnc, ysr, jcoomes
| author | jmasa |
|---|---|
| date | Tue, 09 Aug 2011 10:16:01 -0700 |
| parents | c2bf0120ee5d |
| children | 95f6641e38e0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2002, 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 "code/codeCache.hpp" | |
| 28 #include "gc_implementation/parallelScavenge/cardTableExtension.hpp" | |
| 29 #include "gc_implementation/parallelScavenge/gcTaskManager.hpp" | |
| 30 #include "gc_implementation/parallelScavenge/psMarkSweep.hpp" | |
| 31 #include "gc_implementation/parallelScavenge/psPromotionManager.hpp" | |
| 32 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" | |
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33 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" |
| 1972 | 34 #include "gc_implementation/parallelScavenge/psTasks.hpp" |
| 35 #include "memory/iterator.hpp" | |
| 36 #include "memory/universe.hpp" | |
| 37 #include "oops/oop.inline.hpp" | |
| 38 #include "oops/oop.psgc.inline.hpp" | |
| 39 #include "runtime/fprofiler.hpp" | |
| 40 #include "runtime/thread.hpp" | |
| 41 #include "runtime/vmThread.hpp" | |
| 42 #include "services/management.hpp" | |
| 43 #include "utilities/taskqueue.hpp" | |
| 0 | 44 |
| 45 // | |
| 46 // ScavengeRootsTask | |
| 47 // | |
| 48 | |
| 49 void ScavengeRootsTask::do_it(GCTaskManager* manager, uint which) { | |
| 50 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
| 51 | |
| 52 PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which); | |
| 53 PSScavengeRootsClosure roots_closure(pm); | |
| 54 | |
| 55 switch (_root_type) { | |
| 56 case universe: | |
| 57 Universe::oops_do(&roots_closure); | |
| 58 break; | |
| 59 | |
| 60 case jni_handles: | |
| 61 JNIHandles::oops_do(&roots_closure); | |
| 62 break; | |
| 63 | |
| 64 case threads: | |
| 65 { | |
| 66 ResourceMark rm; | |
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67 Threads::oops_do(&roots_closure, NULL); |
| 0 | 68 } |
| 69 break; | |
| 70 | |
| 71 case object_synchronizer: | |
| 72 ObjectSynchronizer::oops_do(&roots_closure); | |
| 73 break; | |
| 74 | |
| 75 case flat_profiler: | |
| 76 FlatProfiler::oops_do(&roots_closure); | |
| 77 break; | |
| 78 | |
| 79 case system_dictionary: | |
| 80 SystemDictionary::oops_do(&roots_closure); | |
| 81 break; | |
| 82 | |
| 83 case management: | |
| 84 Management::oops_do(&roots_closure); | |
| 85 break; | |
| 86 | |
| 87 case jvmti: | |
| 88 JvmtiExport::oops_do(&roots_closure); | |
| 89 break; | |
| 90 | |
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91 |
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92 case code_cache: |
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93 { |
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94 CodeBlobToOopClosure each_scavengable_code_blob(&roots_closure, /*do_marking=*/ true); |
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95 CodeCache::scavenge_root_nmethods_do(&each_scavengable_code_blob); |
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96 } |
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97 break; |
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98 |
| 0 | 99 default: |
| 100 fatal("Unknown root type"); | |
| 101 } | |
| 102 | |
| 103 // Do the real work | |
| 104 pm->drain_stacks(false); | |
| 105 } | |
| 106 | |
| 107 // | |
| 108 // ThreadRootsTask | |
| 109 // | |
| 110 | |
| 111 void ThreadRootsTask::do_it(GCTaskManager* manager, uint which) { | |
| 112 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
| 113 | |
| 114 PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which); | |
| 115 PSScavengeRootsClosure roots_closure(pm); | |
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116 CodeBlobToOopClosure roots_in_blobs(&roots_closure, /*do_marking=*/ true); |
| 0 | 117 |
| 118 if (_java_thread != NULL) | |
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119 _java_thread->oops_do(&roots_closure, &roots_in_blobs); |
| 0 | 120 |
| 121 if (_vm_thread != NULL) | |
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122 _vm_thread->oops_do(&roots_closure, &roots_in_blobs); |
| 0 | 123 |
| 124 // Do the real work | |
| 125 pm->drain_stacks(false); | |
| 126 } | |
| 127 | |
| 128 // | |
| 129 // StealTask | |
| 130 // | |
| 131 | |
| 132 StealTask::StealTask(ParallelTaskTerminator* t) : | |
| 133 _terminator(t) {} | |
| 134 | |
| 135 void StealTask::do_it(GCTaskManager* manager, uint which) { | |
| 136 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
| 137 | |
| 138 PSPromotionManager* pm = | |
| 139 PSPromotionManager::gc_thread_promotion_manager(which); | |
| 140 pm->drain_stacks(true); | |
| 141 guarantee(pm->stacks_empty(), | |
| 142 "stacks should be empty at this point"); | |
| 143 | |
| 144 int random_seed = 17; | |
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145 while(true) { |
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146 StarTask p; |
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147 if (PSPromotionManager::steal_depth(which, &random_seed, p)) { |
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148 TASKQUEUE_STATS_ONLY(pm->record_steal(p)); |
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149 pm->process_popped_location_depth(p); |
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150 pm->drain_stacks_depth(true); |
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151 } else { |
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152 if (terminator()->offer_termination()) { |
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153 break; |
| 0 | 154 } |
| 155 } | |
| 156 } | |
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157 guarantee(pm->stacks_empty(), "stacks should be empty at this point"); |
| 0 | 158 } |
| 159 | |
| 160 // | |
| 161 // SerialOldToYoungRootsTask | |
| 162 // | |
| 163 | |
| 164 void SerialOldToYoungRootsTask::do_it(GCTaskManager* manager, uint which) { | |
| 165 assert(_gen != NULL, "Sanity"); | |
| 166 assert(_gen->object_space()->contains(_gen_top) || _gen_top == _gen->object_space()->top(), "Sanity"); | |
| 167 | |
| 168 { | |
| 169 PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which); | |
| 170 | |
| 171 assert(Universe::heap()->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
| 172 CardTableExtension* card_table = (CardTableExtension *)Universe::heap()->barrier_set(); | |
| 173 // FIX ME! Assert that card_table is the type we believe it to be. | |
| 174 | |
| 175 card_table->scavenge_contents(_gen->start_array(), | |
| 176 _gen->object_space(), | |
| 177 _gen_top, | |
| 178 pm); | |
| 179 | |
| 180 // Do the real work | |
| 181 pm->drain_stacks(false); | |
| 182 } | |
| 183 } | |
| 184 | |
| 185 // | |
| 186 // OldToYoungRootsTask | |
| 187 // | |
| 188 | |
| 189 void OldToYoungRootsTask::do_it(GCTaskManager* manager, uint which) { | |
| 190 assert(_gen != NULL, "Sanity"); | |
| 191 assert(_gen->object_space()->contains(_gen_top) || _gen_top == _gen->object_space()->top(), "Sanity"); | |
| 192 assert(_stripe_number < ParallelGCThreads, "Sanity"); | |
| 193 | |
| 194 { | |
| 195 PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which); | |
| 196 | |
| 197 assert(Universe::heap()->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
| 198 CardTableExtension* card_table = (CardTableExtension *)Universe::heap()->barrier_set(); | |
| 199 // FIX ME! Assert that card_table is the type we believe it to be. | |
| 200 | |
| 201 card_table->scavenge_contents_parallel(_gen->start_array(), | |
| 202 _gen->object_space(), | |
| 203 _gen_top, | |
| 204 pm, | |
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205 _stripe_number, |
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206 _stripe_total); |
| 0 | 207 |
| 208 // Do the real work | |
| 209 pm->drain_stacks(false); | |
| 210 } | |
| 211 } |