author | coleenp |
Mon, 25 Apr 2016 09:51:00 -0400 | |
changeset 38074 | 8475fdc6dcc3 |
parent 37260 | 664b7520c44b |
child 38170 | ff88a25a7799 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
37248 | 2 |
* Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
7397 | 25 |
#include "precompiled.hpp" |
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#include "classfile/systemDictionary.hpp" |
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#include "code/codeCache.hpp" |
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30764 | 28 |
#include "gc/parallel/parallelScavengeHeap.hpp" |
29 |
#include "gc/parallel/pcTasks.hpp" |
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30 |
#include "gc/parallel/psCompactionManager.inline.hpp" |
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#include "gc/parallel/psParallelCompact.hpp" |
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#include "gc/shared/collectedHeap.hpp" |
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#include "gc/shared/gcTimer.hpp" |
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35061 | 34 |
#include "gc/shared/gcTraceTime.inline.hpp" |
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#include "logging/log.hpp" |
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37248 | 36 |
#include "memory/resourceArea.hpp" |
7397 | 37 |
#include "memory/universe.hpp" |
38 |
#include "oops/objArrayKlass.inline.hpp" |
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39 |
#include "oops/oop.inline.hpp" |
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40 |
#include "prims/jvmtiExport.hpp" |
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#include "runtime/fprofiler.hpp" |
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#include "runtime/jniHandles.hpp" |
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#include "runtime/thread.hpp" |
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#include "runtime/vmThread.hpp" |
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#include "services/management.hpp" |
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#include "utilities/stack.inline.hpp" |
1 | 47 |
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// |
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// ThreadRootsMarkingTask |
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// |
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52 |
void ThreadRootsMarkingTask::do_it(GCTaskManager* manager, uint which) { |
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assert(ParallelScavengeHeap::heap()->is_gc_active(), "called outside gc"); |
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ResourceMark rm; |
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ParCompactionManager* cm = |
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ParCompactionManager::gc_thread_compaction_manager(which); |
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59 |
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ParCompactionManager::MarkAndPushClosure mark_and_push_closure(cm); |
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MarkingCodeBlobClosure mark_and_push_in_blobs(&mark_and_push_closure, !CodeBlobToOopClosure::FixRelocations); |
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if (_java_thread != NULL) |
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_java_thread->oops_do( |
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&mark_and_push_closure, |
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&mark_and_push_in_blobs); |
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if (_vm_thread != NULL) |
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_vm_thread->oops_do( |
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&mark_and_push_closure, |
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&mark_and_push_in_blobs); |
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// Do the real work |
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cm->follow_marking_stacks(); |
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} |
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void MarkFromRootsTask::do_it(GCTaskManager* manager, uint which) { |
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assert(ParallelScavengeHeap::heap()->is_gc_active(), "called outside gc"); |
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ParCompactionManager* cm = |
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ParCompactionManager::gc_thread_compaction_manager(which); |
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ParCompactionManager::MarkAndPushClosure mark_and_push_closure(cm); |
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ParCompactionManager::FollowKlassClosure follow_klass_closure(&mark_and_push_closure); |
1 | 85 |
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switch (_root_type) { |
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case universe: |
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Universe::oops_do(&mark_and_push_closure); |
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break; |
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case jni_handles: |
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JNIHandles::oops_do(&mark_and_push_closure); |
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break; |
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case threads: |
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{ |
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ResourceMark rm; |
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MarkingCodeBlobClosure each_active_code_blob(&mark_and_push_closure, !CodeBlobToOopClosure::FixRelocations); |
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Threads::oops_do(&mark_and_push_closure, &each_active_code_blob); |
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} |
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break; |
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case object_synchronizer: |
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ObjectSynchronizer::oops_do(&mark_and_push_closure); |
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break; |
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case flat_profiler: |
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FlatProfiler::oops_do(&mark_and_push_closure); |
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break; |
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case management: |
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Management::oops_do(&mark_and_push_closure); |
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break; |
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case jvmti: |
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JvmtiExport::oops_do(&mark_and_push_closure); |
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break; |
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case system_dictionary: |
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SystemDictionary::always_strong_oops_do(&mark_and_push_closure); |
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break; |
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case class_loader_data: |
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ClassLoaderDataGraph::always_strong_oops_do(&mark_and_push_closure, &follow_klass_closure, true); |
1 | 125 |
break; |
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case code_cache: |
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// Do not treat nmethods as strong roots for mark/sweep, since we can unload them. |
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//CodeCache::scavenge_root_nmethods_do(CodeBlobToOopClosure(&mark_and_push_closure)); |
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break; |
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131 |
|
1 | 132 |
default: |
133 |
fatal("Unknown root type"); |
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} |
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136 |
// Do the real work |
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cm->follow_marking_stacks(); |
1 | 138 |
} |
139 |
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140 |
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141 |
// |
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// RefProcTaskProxy |
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// |
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144 |
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145 |
void RefProcTaskProxy::do_it(GCTaskManager* manager, uint which) |
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146 |
{ |
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assert(ParallelScavengeHeap::heap()->is_gc_active(), "called outside gc"); |
1 | 148 |
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149 |
ParCompactionManager* cm = |
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150 |
ParCompactionManager::gc_thread_compaction_manager(which); |
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ParCompactionManager::MarkAndPushClosure mark_and_push_closure(cm); |
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152 |
ParCompactionManager::FollowStackClosure follow_stack_closure(cm); |
1 | 153 |
_rp_task.work(_work_id, *PSParallelCompact::is_alive_closure(), |
154 |
mark_and_push_closure, follow_stack_closure); |
|
155 |
} |
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156 |
||
157 |
// |
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158 |
// RefProcTaskExecutor |
|
159 |
// |
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160 |
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161 |
void RefProcTaskExecutor::execute(ProcessTask& task) |
|
162 |
{ |
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ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
1 | 164 |
uint parallel_gc_threads = heap->gc_task_manager()->workers(); |
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uint active_gc_threads = heap->gc_task_manager()->active_workers(); |
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166 |
OopTaskQueueSet* qset = ParCompactionManager::stack_array(); |
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167 |
ParallelTaskTerminator terminator(active_gc_threads, qset); |
1 | 168 |
GCTaskQueue* q = GCTaskQueue::create(); |
169 |
for(uint i=0; i<parallel_gc_threads; i++) { |
|
170 |
q->enqueue(new RefProcTaskProxy(task, i)); |
|
171 |
} |
|
172 |
if (task.marks_oops_alive()) { |
|
173 |
if (parallel_gc_threads>1) { |
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174 |
for (uint j=0; j<active_gc_threads; j++) { |
1 | 175 |
q->enqueue(new StealMarkingTask(&terminator)); |
176 |
} |
|
177 |
} |
|
178 |
} |
|
179 |
PSParallelCompact::gc_task_manager()->execute_and_wait(q); |
|
180 |
} |
|
181 |
||
182 |
void RefProcTaskExecutor::execute(EnqueueTask& task) |
|
183 |
{ |
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184 |
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap(); |
1 | 185 |
uint parallel_gc_threads = heap->gc_task_manager()->workers(); |
186 |
GCTaskQueue* q = GCTaskQueue::create(); |
|
187 |
for(uint i=0; i<parallel_gc_threads; i++) { |
|
188 |
q->enqueue(new RefEnqueueTaskProxy(task, i)); |
|
189 |
} |
|
190 |
PSParallelCompact::gc_task_manager()->execute_and_wait(q); |
|
191 |
} |
|
192 |
||
193 |
// |
|
194 |
// StealMarkingTask |
|
195 |
// |
|
196 |
||
197 |
StealMarkingTask::StealMarkingTask(ParallelTaskTerminator* t) : |
|
198 |
_terminator(t) {} |
|
199 |
||
200 |
void StealMarkingTask::do_it(GCTaskManager* manager, uint which) { |
|
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|
201 |
assert(ParallelScavengeHeap::heap()->is_gc_active(), "called outside gc"); |
1 | 202 |
|
203 |
ParCompactionManager* cm = |
|
204 |
ParCompactionManager::gc_thread_compaction_manager(which); |
|
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205 |
ParCompactionManager::MarkAndPushClosure mark_and_push_closure(cm); |
1 | 206 |
|
207 |
oop obj = NULL; |
|
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208 |
ObjArrayTask task; |
1 | 209 |
int random_seed = 17; |
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|
210 |
do { |
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|
211 |
while (ParCompactionManager::steal_objarray(which, &random_seed, task)) { |
29792
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212 |
cm->follow_contents((objArrayOop)task.obj(), task.index()); |
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213 |
cm->follow_marking_stacks(); |
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|
214 |
} |
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|
215 |
while (ParCompactionManager::steal(which, &random_seed, obj)) { |
29792
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216 |
cm->follow_contents(obj); |
5076
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|
217 |
cm->follow_marking_stacks(); |
1 | 218 |
} |
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219 |
} while (!terminator()->offer_termination()); |
1 | 220 |
} |
221 |
||
222 |
// |
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223 |
// StealRegionCompactionTask |
1 | 224 |
// |
225 |
||
1407
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|
226 |
StealRegionCompactionTask::StealRegionCompactionTask(ParallelTaskTerminator* t): |
9006b01ba3fd
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227 |
_terminator(t) {} |
1 | 228 |
|
1407
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229 |
void StealRegionCompactionTask::do_it(GCTaskManager* manager, uint which) { |
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230 |
assert(ParallelScavengeHeap::heap()->is_gc_active(), "called outside gc"); |
1 | 231 |
|
232 |
ParCompactionManager* cm = |
|
233 |
ParCompactionManager::gc_thread_compaction_manager(which); |
|
234 |
||
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235 |
|
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236 |
// If not all threads are active, get a draining stack |
fccee5238e70
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237 |
// from the list. Else, just use this threads draining stack. |
fccee5238e70
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|
238 |
uint which_stack_index; |
fccee5238e70
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|
239 |
bool use_all_workers = manager->all_workers_active(); |
fccee5238e70
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|
240 |
if (use_all_workers) { |
fccee5238e70
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|
241 |
which_stack_index = which; |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
242 |
assert(manager->active_workers() == ParallelGCThreads, |
33105
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8080775: Better argument formatting for assert() and friends
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diff
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|
243 |
"all_workers_active has been incorrectly set: " |
294e48b4f704
8080775: Better argument formatting for assert() and friends
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|
244 |
" active %d ParallelGCThreads %u", manager->active_workers(), |
294e48b4f704
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|
245 |
ParallelGCThreads); |
11174
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|
246 |
} else { |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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changeset
|
247 |
which_stack_index = ParCompactionManager::pop_recycled_stack_index(); |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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} |
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cm->set_region_stack_index(which_stack_index); |
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cm->set_region_stack(ParCompactionManager::region_list(which_stack_index)); |
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// Has to drain stacks first because there may be regions on |
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// preloaded onto the stack and this thread may never have |
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// done a draining task. Are the draining tasks needed? |
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cm->drain_region_stacks(); |
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size_t region_index = 0; |
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int random_seed = 17; |
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// If we're the termination task, try 10 rounds of stealing before |
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// setting the termination flag |
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while(true) { |
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if (ParCompactionManager::steal(which, &random_seed, region_index)) { |
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PSParallelCompact::fill_and_update_region(cm, region_index); |
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cm->drain_region_stacks(); |
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} else { |
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if (terminator()->offer_termination()) { |
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break; |
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} |
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// Go around again. |
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} |
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} |
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return; |
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} |
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UpdateDensePrefixTask::UpdateDensePrefixTask( |
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PSParallelCompact::SpaceId space_id, |
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size_t region_index_start, |
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size_t region_index_end) : |
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_space_id(space_id), _region_index_start(region_index_start), |
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_region_index_end(region_index_end) {} |
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void UpdateDensePrefixTask::do_it(GCTaskManager* manager, uint which) { |
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ParCompactionManager* cm = |
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ParCompactionManager::gc_thread_compaction_manager(which); |
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PSParallelCompact::update_and_deadwood_in_dense_prefix(cm, |
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_space_id, |
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_region_index_start, |
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_region_index_end); |
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} |
296 |
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void DrainStacksCompactionTask::do_it(GCTaskManager* manager, uint which) { |
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assert(ParallelScavengeHeap::heap()->is_gc_active(), "called outside gc"); |
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ParCompactionManager* cm = |
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ParCompactionManager::gc_thread_compaction_manager(which); |
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uint which_stack_index; |
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bool use_all_workers = manager->all_workers_active(); |
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if (use_all_workers) { |
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which_stack_index = which; |
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assert(manager->active_workers() == ParallelGCThreads, |
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"all_workers_active has been incorrectly set: " |
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" active %d ParallelGCThreads %u", manager->active_workers(), |
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ParallelGCThreads); |
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} else { |
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which_stack_index = stack_index(); |
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} |
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cm->set_region_stack(ParCompactionManager::region_list(which_stack_index)); |
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|
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cm->set_region_stack_index(which_stack_index); |
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// Process any regions already in the compaction managers stacks. |
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cm->drain_region_stacks(); |
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|
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assert(cm->region_stack()->is_empty(), "Not empty"); |
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|
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if (!use_all_workers) { |
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// Always give up the region stack. |
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assert(cm->region_stack() == |
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ParCompactionManager::region_list(cm->region_stack_index()), |
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"region_stack and region_stack_index are inconsistent"); |
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ParCompactionManager::push_recycled_stack_index(cm->region_stack_index()); |
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|
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cm->set_region_stack(NULL); |
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332 |
cm->set_region_stack_index((uint)max_uintx); |
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333 |
} |
1 | 334 |
} |