Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp @ 6817:f81a7c0c618d
7199349: NPG: PS: Crash seen in jprt
Reviewed-by: johnc
author | jmasa |
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date | Wed, 03 Oct 2012 08:08:52 -0700 |
parents | da91efe96a93 |
children | d8ce2825b193 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2005, 2012, 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/pcTasks.hpp" | |
29 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp" | |
30 #include "gc_interface/collectedHeap.hpp" | |
31 #include "memory/universe.hpp" | |
32 #include "oops/objArrayKlass.inline.hpp" | |
33 #include "oops/oop.inline.hpp" | |
34 #include "oops/oop.pcgc.inline.hpp" | |
35 #include "prims/jvmtiExport.hpp" | |
36 #include "runtime/fprofiler.hpp" | |
37 #include "runtime/jniHandles.hpp" | |
38 #include "runtime/thread.hpp" | |
39 #include "runtime/vmThread.hpp" | |
40 #include "services/management.hpp" | |
0 | 41 |
42 // | |
43 // ThreadRootsMarkingTask | |
44 // | |
45 | |
46 void ThreadRootsMarkingTask::do_it(GCTaskManager* manager, uint which) { | |
47 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
48 | |
49 ResourceMark rm; | |
50 | |
51 NOT_PRODUCT(TraceTime tm("ThreadRootsMarkingTask", | |
52 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
53 ParCompactionManager* cm = | |
54 ParCompactionManager::gc_thread_compaction_manager(which); | |
55 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); | |
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56 CodeBlobToOopClosure mark_and_push_in_blobs(&mark_and_push_closure, /*do_marking=*/ true); |
0 | 57 |
58 if (_java_thread != NULL) | |
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59 _java_thread->oops_do(&mark_and_push_closure, &mark_and_push_in_blobs); |
0 | 60 |
61 if (_vm_thread != NULL) | |
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62 _vm_thread->oops_do(&mark_and_push_closure, &mark_and_push_in_blobs); |
0 | 63 |
64 // Do the real work | |
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65 cm->follow_marking_stacks(); |
0 | 66 } |
67 | |
68 | |
69 void MarkFromRootsTask::do_it(GCTaskManager* manager, uint which) { | |
70 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
71 | |
72 NOT_PRODUCT(TraceTime tm("MarkFromRootsTask", | |
73 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
74 ParCompactionManager* cm = | |
75 ParCompactionManager::gc_thread_compaction_manager(which); | |
76 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); | |
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77 PSParallelCompact::FollowKlassClosure follow_klass_closure(&mark_and_push_closure); |
0 | 78 |
79 switch (_root_type) { | |
80 case universe: | |
81 Universe::oops_do(&mark_and_push_closure); | |
82 break; | |
83 | |
84 case jni_handles: | |
85 JNIHandles::oops_do(&mark_and_push_closure); | |
86 break; | |
87 | |
88 case threads: | |
89 { | |
90 ResourceMark rm; | |
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91 CodeBlobToOopClosure each_active_code_blob(&mark_and_push_closure, /*do_marking=*/ true); |
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92 Threads::oops_do(&mark_and_push_closure, &each_active_code_blob); |
0 | 93 } |
94 break; | |
95 | |
96 case object_synchronizer: | |
97 ObjectSynchronizer::oops_do(&mark_and_push_closure); | |
98 break; | |
99 | |
100 case flat_profiler: | |
101 FlatProfiler::oops_do(&mark_and_push_closure); | |
102 break; | |
103 | |
104 case management: | |
105 Management::oops_do(&mark_and_push_closure); | |
106 break; | |
107 | |
108 case jvmti: | |
109 JvmtiExport::oops_do(&mark_and_push_closure); | |
110 break; | |
111 | |
112 case system_dictionary: | |
113 SystemDictionary::always_strong_oops_do(&mark_and_push_closure); | |
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114 ClassLoaderDataGraph::always_strong_oops_do(&mark_and_push_closure, &follow_klass_closure, true); |
0 | 115 break; |
116 | |
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117 case code_cache: |
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118 // Do not treat nmethods as strong roots for mark/sweep, since we can unload them. |
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119 //CodeCache::scavenge_root_nmethods_do(CodeBlobToOopClosure(&mark_and_push_closure)); |
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120 break; |
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121 |
0 | 122 default: |
123 fatal("Unknown root type"); | |
124 } | |
125 | |
126 // Do the real work | |
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127 cm->follow_marking_stacks(); |
0 | 128 } |
129 | |
130 | |
131 // | |
132 // RefProcTaskProxy | |
133 // | |
134 | |
135 void RefProcTaskProxy::do_it(GCTaskManager* manager, uint which) | |
136 { | |
137 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
138 | |
139 NOT_PRODUCT(TraceTime tm("RefProcTask", | |
140 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
141 ParCompactionManager* cm = | |
142 ParCompactionManager::gc_thread_compaction_manager(which); | |
143 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); | |
144 PSParallelCompact::FollowStackClosure follow_stack_closure(cm); | |
145 _rp_task.work(_work_id, *PSParallelCompact::is_alive_closure(), | |
146 mark_and_push_closure, follow_stack_closure); | |
147 } | |
148 | |
149 // | |
150 // RefProcTaskExecutor | |
151 // | |
152 | |
153 void RefProcTaskExecutor::execute(ProcessTask& task) | |
154 { | |
155 ParallelScavengeHeap* heap = PSParallelCompact::gc_heap(); | |
156 uint parallel_gc_threads = heap->gc_task_manager()->workers(); | |
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157 uint active_gc_threads = heap->gc_task_manager()->active_workers(); |
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158 RegionTaskQueueSet* qset = ParCompactionManager::region_array(); |
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159 ParallelTaskTerminator terminator(active_gc_threads, qset); |
0 | 160 GCTaskQueue* q = GCTaskQueue::create(); |
161 for(uint i=0; i<parallel_gc_threads; i++) { | |
162 q->enqueue(new RefProcTaskProxy(task, i)); | |
163 } | |
164 if (task.marks_oops_alive()) { | |
165 if (parallel_gc_threads>1) { | |
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166 for (uint j=0; j<active_gc_threads; j++) { |
0 | 167 q->enqueue(new StealMarkingTask(&terminator)); |
168 } | |
169 } | |
170 } | |
171 PSParallelCompact::gc_task_manager()->execute_and_wait(q); | |
172 } | |
173 | |
174 void RefProcTaskExecutor::execute(EnqueueTask& task) | |
175 { | |
176 ParallelScavengeHeap* heap = PSParallelCompact::gc_heap(); | |
177 uint parallel_gc_threads = heap->gc_task_manager()->workers(); | |
178 GCTaskQueue* q = GCTaskQueue::create(); | |
179 for(uint i=0; i<parallel_gc_threads; i++) { | |
180 q->enqueue(new RefEnqueueTaskProxy(task, i)); | |
181 } | |
182 PSParallelCompact::gc_task_manager()->execute_and_wait(q); | |
183 } | |
184 | |
185 // | |
186 // StealMarkingTask | |
187 // | |
188 | |
189 StealMarkingTask::StealMarkingTask(ParallelTaskTerminator* t) : | |
190 _terminator(t) {} | |
191 | |
192 void StealMarkingTask::do_it(GCTaskManager* manager, uint which) { | |
193 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
194 | |
195 NOT_PRODUCT(TraceTime tm("StealMarkingTask", | |
196 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
197 | |
198 ParCompactionManager* cm = | |
199 ParCompactionManager::gc_thread_compaction_manager(which); | |
200 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); | |
201 | |
202 oop obj = NULL; | |
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203 ObjArrayTask task; |
0 | 204 int random_seed = 17; |
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205 do { |
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206 while (ParCompactionManager::steal_objarray(which, &random_seed, task)) { |
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207 objArrayKlass* const k = (objArrayKlass*)task.obj()->klass(); |
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208 k->oop_follow_contents(cm, task.obj(), task.index()); |
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209 cm->follow_marking_stacks(); |
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210 } |
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211 while (ParCompactionManager::steal(which, &random_seed, obj)) { |
0 | 212 obj->follow_contents(cm); |
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213 cm->follow_marking_stacks(); |
0 | 214 } |
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215 } while (!terminator()->offer_termination()); |
0 | 216 } |
217 | |
218 // | |
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219 // StealRegionCompactionTask |
0 | 220 // |
221 | |
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222 StealRegionCompactionTask::StealRegionCompactionTask(ParallelTaskTerminator* t): |
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223 _terminator(t) {} |
0 | 224 |
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225 void StealRegionCompactionTask::do_it(GCTaskManager* manager, uint which) { |
0 | 226 assert(Universe::heap()->is_gc_active(), "called outside gc"); |
227 | |
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228 NOT_PRODUCT(TraceTime tm("StealRegionCompactionTask", |
0 | 229 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); |
230 | |
231 ParCompactionManager* cm = | |
232 ParCompactionManager::gc_thread_compaction_manager(which); | |
233 | |
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234 |
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235 // If not all threads are active, get a draining stack |
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236 // from the list. Else, just use this threads draining stack. |
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237 uint which_stack_index; |
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238 bool use_all_workers = manager->all_workers_active(); |
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239 if (use_all_workers) { |
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240 which_stack_index = which; |
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241 assert(manager->active_workers() == ParallelGCThreads, |
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242 err_msg("all_workers_active has been incorrectly set: " |
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243 " active %d ParallelGCThreads %d", manager->active_workers(), |
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244 ParallelGCThreads)); |
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245 } else { |
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246 which_stack_index = ParCompactionManager::pop_recycled_stack_index(); |
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247 } |
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248 |
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249 cm->set_region_stack_index(which_stack_index); |
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250 cm->set_region_stack(ParCompactionManager::region_list(which_stack_index)); |
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251 if (TraceDynamicGCThreads) { |
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252 gclog_or_tty->print_cr("StealRegionCompactionTask::do_it " |
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253 "region_stack_index %d region_stack = 0x%x " |
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254 " empty (%d) use all workers %d", |
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255 which_stack_index, ParCompactionManager::region_list(which_stack_index), |
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256 cm->region_stack()->is_empty(), |
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257 use_all_workers); |
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258 } |
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259 |
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260 // Has to drain stacks first because there may be regions on |
0 | 261 // preloaded onto the stack and this thread may never have |
262 // done a draining task. Are the draining tasks needed? | |
263 | |
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264 cm->drain_region_stacks(); |
0 | 265 |
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266 size_t region_index = 0; |
0 | 267 int random_seed = 17; |
268 | |
269 // If we're the termination task, try 10 rounds of stealing before | |
270 // setting the termination flag | |
271 | |
272 while(true) { | |
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273 if (ParCompactionManager::steal(which, &random_seed, region_index)) { |
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274 PSParallelCompact::fill_and_update_region(cm, region_index); |
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275 cm->drain_region_stacks(); |
0 | 276 } else { |
277 if (terminator()->offer_termination()) { | |
278 break; | |
279 } | |
280 // Go around again. | |
281 } | |
282 } | |
283 return; | |
284 } | |
285 | |
286 UpdateDensePrefixTask::UpdateDensePrefixTask( | |
287 PSParallelCompact::SpaceId space_id, | |
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288 size_t region_index_start, |
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289 size_t region_index_end) : |
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290 _space_id(space_id), _region_index_start(region_index_start), |
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291 _region_index_end(region_index_end) {} |
0 | 292 |
293 void UpdateDensePrefixTask::do_it(GCTaskManager* manager, uint which) { | |
294 | |
295 NOT_PRODUCT(TraceTime tm("UpdateDensePrefixTask", | |
296 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
297 | |
298 ParCompactionManager* cm = | |
299 ParCompactionManager::gc_thread_compaction_manager(which); | |
300 | |
301 PSParallelCompact::update_and_deadwood_in_dense_prefix(cm, | |
302 _space_id, | |
375
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303 _region_index_start, |
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304 _region_index_end); |
0 | 305 } |
306 | |
307 void DrainStacksCompactionTask::do_it(GCTaskManager* manager, uint which) { | |
308 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
309 | |
310 NOT_PRODUCT(TraceTime tm("DrainStacksCompactionTask", | |
311 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
312 | |
313 ParCompactionManager* cm = | |
314 ParCompactionManager::gc_thread_compaction_manager(which); | |
315 | |
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316 uint which_stack_index; |
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317 bool use_all_workers = manager->all_workers_active(); |
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318 if (use_all_workers) { |
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319 which_stack_index = which; |
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320 assert(manager->active_workers() == ParallelGCThreads, |
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321 err_msg("all_workers_active has been incorrectly set: " |
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322 " active %d ParallelGCThreads %d", manager->active_workers(), |
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323 ParallelGCThreads)); |
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324 } else { |
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325 which_stack_index = stack_index(); |
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326 } |
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327 |
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328 cm->set_region_stack(ParCompactionManager::region_list(which_stack_index)); |
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329 if (TraceDynamicGCThreads) { |
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330 gclog_or_tty->print_cr("DrainStacksCompactionTask::do_it which = %d " |
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331 "which_stack_index = %d/empty(%d) " |
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332 "use all workers %d", |
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333 which, which_stack_index, |
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334 cm->region_stack()->is_empty(), |
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335 use_all_workers); |
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336 } |
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337 |
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338 cm->set_region_stack_index(which_stack_index); |
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339 |
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340 // Process any regions already in the compaction managers stacks. |
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341 cm->drain_region_stacks(); |
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342 |
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343 assert(cm->region_stack()->is_empty(), "Not empty"); |
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344 |
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345 if (!use_all_workers) { |
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346 // Always give up the region stack. |
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347 assert(cm->region_stack() == |
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348 ParCompactionManager::region_list(cm->region_stack_index()), |
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349 "region_stack and region_stack_index are inconsistent"); |
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350 ParCompactionManager::push_recycled_stack_index(cm->region_stack_index()); |
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351 |
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352 if (TraceDynamicGCThreads) { |
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353 void* old_region_stack = (void*) cm->region_stack(); |
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354 int old_region_stack_index = cm->region_stack_index(); |
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355 gclog_or_tty->print_cr("Pushing region stack 0x%x/%d", |
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356 old_region_stack, old_region_stack_index); |
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357 } |
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358 |
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359 cm->set_region_stack(NULL); |
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360 cm->set_region_stack_index((uint)max_uintx); |
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361 } |
0 | 362 } |