author | stefank |
Thu, 26 Mar 2015 11:28:19 +0100 | |
changeset 29792 | 8c6fa07f0869 |
parent 29701 | f638fc81a3d0 |
child 29798 | 451c73fdf690 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 2005, 2015, 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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||
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#include "precompiled.hpp" |
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#include "classfile/systemDictionary.hpp" |
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#include "code/codeCache.hpp" |
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#include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" |
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#include "gc_implementation/parallelScavenge/pcTasks.hpp" |
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#include "gc_implementation/parallelScavenge/psCompactionManager.inline.hpp" |
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#include "gc_implementation/parallelScavenge/psParallelCompact.hpp" |
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#include "gc_implementation/shared/gcTimer.hpp" |
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#include "gc_implementation/shared/gcTraceTime.hpp" |
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#include "gc_interface/collectedHeap.hpp" |
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#include "memory/universe.hpp" |
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#include "oops/objArrayKlass.inline.hpp" |
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#include "oops/oop.inline.hpp" |
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#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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PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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// |
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// ThreadRootsMarkingTask |
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// |
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void ThreadRootsMarkingTask::do_it(GCTaskManager* manager, uint which) { |
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assert(Universe::heap()->is_gc_active(), "called outside gc"); |
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ResourceMark rm; |
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NOT_PRODUCT(GCTraceTime tm("ThreadRootsMarkingTask", |
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PrintGCDetails && TraceParallelOldGCTasks, true, NULL, PSParallelCompact::gc_tracer()->gc_id())); |
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ParCompactionManager* cm = |
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ParCompactionManager::gc_thread_compaction_manager(which); |
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PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); |
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CLDToOopClosure mark_and_push_from_clds(&mark_and_push_closure, true); |
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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_from_clds, |
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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_from_clds, |
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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(Universe::heap()->is_gc_active(), "called outside gc"); |
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NOT_PRODUCT(GCTraceTime tm("MarkFromRootsTask", |
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PrintGCDetails && TraceParallelOldGCTasks, true, NULL, PSParallelCompact::gc_tracer()->gc_id())); |
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ParCompactionManager* cm = |
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ParCompactionManager::gc_thread_compaction_manager(which); |
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PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); |
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PSParallelCompact::FollowKlassClosure follow_klass_closure(&mark_and_push_closure); |
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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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CLDToOopClosure mark_and_push_from_cld(&mark_and_push_closure); |
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Threads::oops_do(&mark_and_push_closure, &mark_and_push_from_cld, &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); |
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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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|
1 | 139 |
default: |
140 |
fatal("Unknown root type"); |
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141 |
} |
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142 |
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// Do the real work |
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cm->follow_marking_stacks(); |
1 | 145 |
} |
146 |
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147 |
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148 |
// |
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149 |
// RefProcTaskProxy |
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150 |
// |
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151 |
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152 |
void RefProcTaskProxy::do_it(GCTaskManager* manager, uint which) |
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153 |
{ |
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154 |
assert(Universe::heap()->is_gc_active(), "called outside gc"); |
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155 |
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NOT_PRODUCT(GCTraceTime tm("RefProcTask", |
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PrintGCDetails && TraceParallelOldGCTasks, true, NULL, PSParallelCompact::gc_tracer()->gc_id())); |
1 | 158 |
ParCompactionManager* cm = |
159 |
ParCompactionManager::gc_thread_compaction_manager(which); |
|
160 |
PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); |
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161 |
PSParallelCompact::FollowStackClosure follow_stack_closure(cm); |
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162 |
_rp_task.work(_work_id, *PSParallelCompact::is_alive_closure(), |
|
163 |
mark_and_push_closure, follow_stack_closure); |
|
164 |
} |
|
165 |
||
166 |
// |
|
167 |
// RefProcTaskExecutor |
|
168 |
// |
|
169 |
||
170 |
void RefProcTaskExecutor::execute(ProcessTask& task) |
|
171 |
{ |
|
172 |
ParallelScavengeHeap* heap = PSParallelCompact::gc_heap(); |
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173 |
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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RegionTaskQueueSet* qset = ParCompactionManager::region_array(); |
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176 |
ParallelTaskTerminator terminator(active_gc_threads, qset); |
1 | 177 |
GCTaskQueue* q = GCTaskQueue::create(); |
178 |
for(uint i=0; i<parallel_gc_threads; i++) { |
|
179 |
q->enqueue(new RefProcTaskProxy(task, i)); |
|
180 |
} |
|
181 |
if (task.marks_oops_alive()) { |
|
182 |
if (parallel_gc_threads>1) { |
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for (uint j=0; j<active_gc_threads; j++) { |
1 | 184 |
q->enqueue(new StealMarkingTask(&terminator)); |
185 |
} |
|
186 |
} |
|
187 |
} |
|
188 |
PSParallelCompact::gc_task_manager()->execute_and_wait(q); |
|
189 |
} |
|
190 |
||
191 |
void RefProcTaskExecutor::execute(EnqueueTask& task) |
|
192 |
{ |
|
193 |
ParallelScavengeHeap* heap = PSParallelCompact::gc_heap(); |
|
194 |
uint parallel_gc_threads = heap->gc_task_manager()->workers(); |
|
195 |
GCTaskQueue* q = GCTaskQueue::create(); |
|
196 |
for(uint i=0; i<parallel_gc_threads; i++) { |
|
197 |
q->enqueue(new RefEnqueueTaskProxy(task, i)); |
|
198 |
} |
|
199 |
PSParallelCompact::gc_task_manager()->execute_and_wait(q); |
|
200 |
} |
|
201 |
||
202 |
// |
|
203 |
// StealMarkingTask |
|
204 |
// |
|
205 |
||
206 |
StealMarkingTask::StealMarkingTask(ParallelTaskTerminator* t) : |
|
207 |
_terminator(t) {} |
|
208 |
||
209 |
void StealMarkingTask::do_it(GCTaskManager* manager, uint which) { |
|
210 |
assert(Universe::heap()->is_gc_active(), "called outside gc"); |
|
211 |
||
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NOT_PRODUCT(GCTraceTime tm("StealMarkingTask", |
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PrintGCDetails && TraceParallelOldGCTasks, true, NULL, PSParallelCompact::gc_tracer()->gc_id())); |
1 | 214 |
|
215 |
ParCompactionManager* cm = |
|
216 |
ParCompactionManager::gc_thread_compaction_manager(which); |
|
217 |
PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); |
|
218 |
||
219 |
oop obj = NULL; |
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ObjArrayTask task; |
1 | 221 |
int random_seed = 17; |
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222 |
do { |
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223 |
while (ParCompactionManager::steal_objarray(which, &random_seed, task)) { |
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cm->follow_contents((objArrayOop)task.obj(), task.index()); |
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cm->follow_marking_stacks(); |
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226 |
} |
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227 |
while (ParCompactionManager::steal(which, &random_seed, obj)) { |
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cm->follow_contents(obj); |
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cm->follow_marking_stacks(); |
1 | 230 |
} |
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231 |
} while (!terminator()->offer_termination()); |
1 | 232 |
} |
233 |
||
234 |
// |
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235 |
// StealRegionCompactionTask |
1 | 236 |
// |
237 |
||
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238 |
StealRegionCompactionTask::StealRegionCompactionTask(ParallelTaskTerminator* t): |
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239 |
_terminator(t) {} |
1 | 240 |
|
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|
241 |
void StealRegionCompactionTask::do_it(GCTaskManager* manager, uint which) { |
1 | 242 |
assert(Universe::heap()->is_gc_active(), "called outside gc"); |
243 |
||
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NOT_PRODUCT(GCTraceTime tm("StealRegionCompactionTask", |
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245 |
PrintGCDetails && TraceParallelOldGCTasks, true, NULL, PSParallelCompact::gc_tracer()->gc_id())); |
1 | 246 |
|
247 |
ParCompactionManager* cm = |
|
248 |
ParCompactionManager::gc_thread_compaction_manager(which); |
|
249 |
||
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250 |
|
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251 |
// If not all threads are active, get a draining stack |
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252 |
// from the list. Else, just use this threads draining stack. |
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253 |
uint which_stack_index; |
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254 |
bool use_all_workers = manager->all_workers_active(); |
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255 |
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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err_msg("all_workers_active has been incorrectly set: " |
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" active %d ParallelGCThreads %d", manager->active_workers(), |
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ParallelGCThreads)); |
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} else { |
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which_stack_index = ParCompactionManager::pop_recycled_stack_index(); |
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} |
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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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if (TraceDynamicGCThreads) { |
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gclog_or_tty->print_cr("StealRegionCompactionTask::do_it " |
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"region_stack_index %d region_stack = " PTR_FORMAT " " |
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" empty (%d) use all workers %d", |
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which_stack_index, ParCompactionManager::region_list(which_stack_index), |
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cm->region_stack()->is_empty(), |
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use_all_workers); |
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} |
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// Has to drain stacks first because there may be regions on |
1 | 277 |
// preloaded onto the stack and this thread may never have |
278 |
// done a draining task. Are the draining tasks needed? |
|
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cm->drain_region_stacks(); |
1 | 281 |
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size_t region_index = 0; |
1 | 283 |
int random_seed = 17; |
284 |
||
285 |
// If we're the termination task, try 10 rounds of stealing before |
|
286 |
// setting the termination flag |
|
287 |
||
288 |
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(); |
1 | 292 |
} else { |
293 |
if (terminator()->offer_termination()) { |
|
294 |
break; |
|
295 |
} |
|
296 |
// Go around again. |
|
297 |
} |
|
298 |
} |
|
299 |
return; |
|
300 |
} |
|
301 |
||
302 |
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) {} |
1 | 308 |
|
309 |
void UpdateDensePrefixTask::do_it(GCTaskManager* manager, uint which) { |
|
310 |
||
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NOT_PRODUCT(GCTraceTime tm("UpdateDensePrefixTask", |
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PrintGCDetails && TraceParallelOldGCTasks, true, NULL, PSParallelCompact::gc_tracer()->gc_id())); |
1 | 313 |
|
314 |
ParCompactionManager* cm = |
|
315 |
ParCompactionManager::gc_thread_compaction_manager(which); |
|
316 |
||
317 |
PSParallelCompact::update_and_deadwood_in_dense_prefix(cm, |
|
318 |
_space_id, |
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_region_index_start, |
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_region_index_end); |
1 | 321 |
} |
322 |
||
323 |
void DrainStacksCompactionTask::do_it(GCTaskManager* manager, uint which) { |
|
324 |
assert(Universe::heap()->is_gc_active(), "called outside gc"); |
|
325 |
||
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NOT_PRODUCT(GCTraceTime tm("DrainStacksCompactionTask", |
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PrintGCDetails && TraceParallelOldGCTasks, true, NULL, PSParallelCompact::gc_tracer()->gc_id())); |
1 | 328 |
|
329 |
ParCompactionManager* cm = |
|
330 |
ParCompactionManager::gc_thread_compaction_manager(which); |
|
331 |
||
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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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err_msg("all_workers_active has been incorrectly set: " |
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" active %d ParallelGCThreads %d", 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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343 |
|
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cm->set_region_stack(ParCompactionManager::region_list(which_stack_index)); |
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if (TraceDynamicGCThreads) { |
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gclog_or_tty->print_cr("DrainStacksCompactionTask::do_it which = %d " |
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"which_stack_index = %d/empty(%d) " |
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"use all workers %d", |
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which, which_stack_index, |
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cm->region_stack()->is_empty(), |
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use_all_workers); |
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} |
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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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360 |
|
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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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367 |
|
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if (TraceDynamicGCThreads) { |
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void* old_region_stack = (void*) cm->region_stack(); |
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int old_region_stack_index = cm->region_stack_index(); |
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gclog_or_tty->print_cr("Pushing region stack " PTR_FORMAT "/%d", |
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old_region_stack, old_region_stack_index); |
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373 |
} |
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374 |
|
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375 |
cm->set_region_stack(NULL); |
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376 |
cm->set_region_stack_index((uint)max_uintx); |
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377 |
} |
1 | 378 |
} |