Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp @ 21598:05ecef0a6a24
LinearScanLifetimeAnalysisPhase: special case StackStoreOp.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Thu, 28 May 2015 13:07:25 +0200 |
parents | 2c6ef90f030a |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2005, 2014, 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" | |
10405 | 30 #include "gc_implementation/shared/gcTimer.hpp" |
31 #include "gc_implementation/shared/gcTraceTime.hpp" | |
1972 | 32 #include "gc_interface/collectedHeap.hpp" |
33 #include "memory/universe.hpp" | |
34 #include "oops/objArrayKlass.inline.hpp" | |
35 #include "oops/oop.inline.hpp" | |
36 #include "oops/oop.pcgc.inline.hpp" | |
37 #include "prims/jvmtiExport.hpp" | |
38 #include "runtime/fprofiler.hpp" | |
39 #include "runtime/jniHandles.hpp" | |
40 #include "runtime/thread.hpp" | |
41 #include "runtime/vmThread.hpp" | |
42 #include "services/management.hpp" | |
0 | 43 |
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44 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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45 |
0 | 46 // |
47 // ThreadRootsMarkingTask | |
48 // | |
49 | |
50 void ThreadRootsMarkingTask::do_it(GCTaskManager* manager, uint which) { | |
51 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
52 | |
53 ResourceMark rm; | |
54 | |
10405 | 55 NOT_PRODUCT(GCTraceTime tm("ThreadRootsMarkingTask", |
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56 PrintGCDetails && TraceParallelOldGCTasks, true, NULL, PSParallelCompact::gc_tracer()->gc_id())); |
0 | 57 ParCompactionManager* cm = |
58 ParCompactionManager::gc_thread_compaction_manager(which); | |
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59 |
0 | 60 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); |
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61 CLDToOopClosure mark_and_push_from_clds(&mark_and_push_closure, true); |
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62 MarkingCodeBlobClosure mark_and_push_in_blobs(&mark_and_push_closure, !CodeBlobToOopClosure::FixRelocations); |
0 | 63 |
64 if (_java_thread != NULL) | |
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65 _java_thread->oops_do( |
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66 &mark_and_push_closure, |
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67 &mark_and_push_from_clds, |
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68 &mark_and_push_in_blobs); |
0 | 69 |
70 if (_vm_thread != NULL) | |
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71 _vm_thread->oops_do( |
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72 &mark_and_push_closure, |
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73 &mark_and_push_from_clds, |
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74 &mark_and_push_in_blobs); |
0 | 75 |
76 // Do the real work | |
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77 cm->follow_marking_stacks(); |
0 | 78 } |
79 | |
80 | |
81 void MarkFromRootsTask::do_it(GCTaskManager* manager, uint which) { | |
82 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
83 | |
10405 | 84 NOT_PRODUCT(GCTraceTime tm("MarkFromRootsTask", |
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85 PrintGCDetails && TraceParallelOldGCTasks, true, NULL, PSParallelCompact::gc_tracer()->gc_id())); |
0 | 86 ParCompactionManager* cm = |
87 ParCompactionManager::gc_thread_compaction_manager(which); | |
88 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); | |
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89 PSParallelCompact::FollowKlassClosure follow_klass_closure(&mark_and_push_closure); |
0 | 90 |
91 switch (_root_type) { | |
92 case universe: | |
93 Universe::oops_do(&mark_and_push_closure); | |
94 break; | |
95 | |
96 case jni_handles: | |
97 JNIHandles::oops_do(&mark_and_push_closure); | |
98 break; | |
99 | |
100 case threads: | |
101 { | |
102 ResourceMark rm; | |
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103 MarkingCodeBlobClosure each_active_code_blob(&mark_and_push_closure, !CodeBlobToOopClosure::FixRelocations); |
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104 CLDToOopClosure mark_and_push_from_cld(&mark_and_push_closure); |
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105 Threads::oops_do(&mark_and_push_closure, &mark_and_push_from_cld, &each_active_code_blob); |
0 | 106 } |
107 break; | |
108 | |
109 case object_synchronizer: | |
110 ObjectSynchronizer::oops_do(&mark_and_push_closure); | |
111 break; | |
112 | |
113 case flat_profiler: | |
114 FlatProfiler::oops_do(&mark_and_push_closure); | |
115 break; | |
116 | |
117 case management: | |
118 Management::oops_do(&mark_and_push_closure); | |
119 break; | |
120 | |
121 case jvmti: | |
122 JvmtiExport::oops_do(&mark_and_push_closure); | |
123 break; | |
124 | |
125 case system_dictionary: | |
126 SystemDictionary::always_strong_oops_do(&mark_and_push_closure); | |
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127 break; |
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128 |
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129 case class_loader_data: |
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130 ClassLoaderDataGraph::always_strong_oops_do(&mark_and_push_closure, &follow_klass_closure, true); |
0 | 131 break; |
132 | |
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133 case code_cache: |
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134 // Do not treat nmethods as strong roots for mark/sweep, since we can unload them. |
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135 //CodeCache::scavenge_root_nmethods_do(CodeBlobToOopClosure(&mark_and_push_closure)); |
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136 break; |
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137 |
0 | 138 default: |
139 fatal("Unknown root type"); | |
140 } | |
141 | |
142 // Do the real work | |
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143 cm->follow_marking_stacks(); |
0 | 144 } |
145 | |
146 | |
147 // | |
148 // RefProcTaskProxy | |
149 // | |
150 | |
151 void RefProcTaskProxy::do_it(GCTaskManager* manager, uint which) | |
152 { | |
153 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
154 | |
10405 | 155 NOT_PRODUCT(GCTraceTime tm("RefProcTask", |
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156 PrintGCDetails && TraceParallelOldGCTasks, true, NULL, PSParallelCompact::gc_tracer()->gc_id())); |
0 | 157 ParCompactionManager* cm = |
158 ParCompactionManager::gc_thread_compaction_manager(which); | |
159 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); | |
160 PSParallelCompact::FollowStackClosure follow_stack_closure(cm); | |
161 _rp_task.work(_work_id, *PSParallelCompact::is_alive_closure(), | |
162 mark_and_push_closure, follow_stack_closure); | |
163 } | |
164 | |
165 // | |
166 // RefProcTaskExecutor | |
167 // | |
168 | |
169 void RefProcTaskExecutor::execute(ProcessTask& task) | |
170 { | |
171 ParallelScavengeHeap* heap = PSParallelCompact::gc_heap(); | |
172 uint parallel_gc_threads = heap->gc_task_manager()->workers(); | |
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173 uint active_gc_threads = heap->gc_task_manager()->active_workers(); |
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174 RegionTaskQueueSet* qset = ParCompactionManager::region_array(); |
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175 ParallelTaskTerminator terminator(active_gc_threads, qset); |
0 | 176 GCTaskQueue* q = GCTaskQueue::create(); |
177 for(uint i=0; i<parallel_gc_threads; i++) { | |
178 q->enqueue(new RefProcTaskProxy(task, i)); | |
179 } | |
180 if (task.marks_oops_alive()) { | |
181 if (parallel_gc_threads>1) { | |
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182 for (uint j=0; j<active_gc_threads; j++) { |
0 | 183 q->enqueue(new StealMarkingTask(&terminator)); |
184 } | |
185 } | |
186 } | |
187 PSParallelCompact::gc_task_manager()->execute_and_wait(q); | |
188 } | |
189 | |
190 void RefProcTaskExecutor::execute(EnqueueTask& task) | |
191 { | |
192 ParallelScavengeHeap* heap = PSParallelCompact::gc_heap(); | |
193 uint parallel_gc_threads = heap->gc_task_manager()->workers(); | |
194 GCTaskQueue* q = GCTaskQueue::create(); | |
195 for(uint i=0; i<parallel_gc_threads; i++) { | |
196 q->enqueue(new RefEnqueueTaskProxy(task, i)); | |
197 } | |
198 PSParallelCompact::gc_task_manager()->execute_and_wait(q); | |
199 } | |
200 | |
201 // | |
202 // StealMarkingTask | |
203 // | |
204 | |
205 StealMarkingTask::StealMarkingTask(ParallelTaskTerminator* t) : | |
206 _terminator(t) {} | |
207 | |
208 void StealMarkingTask::do_it(GCTaskManager* manager, uint which) { | |
209 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
210 | |
10405 | 211 NOT_PRODUCT(GCTraceTime tm("StealMarkingTask", |
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212 PrintGCDetails && TraceParallelOldGCTasks, true, NULL, PSParallelCompact::gc_tracer()->gc_id())); |
0 | 213 |
214 ParCompactionManager* cm = | |
215 ParCompactionManager::gc_thread_compaction_manager(which); | |
216 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); | |
217 | |
218 oop obj = NULL; | |
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219 ObjArrayTask task; |
0 | 220 int random_seed = 17; |
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221 do { |
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222 while (ParCompactionManager::steal_objarray(which, &random_seed, task)) { |
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223 ObjArrayKlass* k = (ObjArrayKlass*)task.obj()->klass(); |
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224 k->oop_follow_contents(cm, task.obj(), task.index()); |
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225 cm->follow_marking_stacks(); |
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226 } |
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227 while (ParCompactionManager::steal(which, &random_seed, obj)) { |
0 | 228 obj->follow_contents(cm); |
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229 cm->follow_marking_stacks(); |
0 | 230 } |
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231 } while (!terminator()->offer_termination()); |
0 | 232 } |
233 | |
234 // | |
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235 // StealRegionCompactionTask |
0 | 236 // |
237 | |
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238 StealRegionCompactionTask::StealRegionCompactionTask(ParallelTaskTerminator* t): |
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239 _terminator(t) {} |
0 | 240 |
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241 void StealRegionCompactionTask::do_it(GCTaskManager* manager, uint which) { |
0 | 242 assert(Universe::heap()->is_gc_active(), "called outside gc"); |
243 | |
10405 | 244 NOT_PRODUCT(GCTraceTime tm("StealRegionCompactionTask", |
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245 PrintGCDetails && TraceParallelOldGCTasks, true, NULL, PSParallelCompact::gc_tracer()->gc_id())); |
0 | 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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256 which_stack_index = which; |
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257 assert(manager->active_workers() == ParallelGCThreads, |
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258 err_msg("all_workers_active has been incorrectly set: " |
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259 " active %d ParallelGCThreads %d", manager->active_workers(), |
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260 ParallelGCThreads)); |
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261 } else { |
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262 which_stack_index = ParCompactionManager::pop_recycled_stack_index(); |
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263 } |
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264 |
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265 cm->set_region_stack_index(which_stack_index); |
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266 cm->set_region_stack(ParCompactionManager::region_list(which_stack_index)); |
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267 if (TraceDynamicGCThreads) { |
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268 gclog_or_tty->print_cr("StealRegionCompactionTask::do_it " |
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269 "region_stack_index %d region_stack = 0x%x " |
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270 " empty (%d) use all workers %d", |
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271 which_stack_index, ParCompactionManager::region_list(which_stack_index), |
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272 cm->region_stack()->is_empty(), |
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273 use_all_workers); |
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274 } |
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275 |
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276 // Has to drain stacks first because there may be regions on |
0 | 277 // preloaded onto the stack and this thread may never have |
278 // done a draining task. Are the draining tasks needed? | |
279 | |
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280 cm->drain_region_stacks(); |
0 | 281 |
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282 size_t region_index = 0; |
0 | 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) { | |
375
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289 if (ParCompactionManager::steal(which, &random_seed, region_index)) { |
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290 PSParallelCompact::fill_and_update_region(cm, region_index); |
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291 cm->drain_region_stacks(); |
0 | 292 } else { |
293 if (terminator()->offer_termination()) { | |
294 break; | |
295 } | |
296 // Go around again. | |
297 } | |
298 } | |
299 return; | |
300 } | |
301 | |
302 UpdateDensePrefixTask::UpdateDensePrefixTask( | |
303 PSParallelCompact::SpaceId space_id, | |
375
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304 size_t region_index_start, |
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305 size_t region_index_end) : |
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306 _space_id(space_id), _region_index_start(region_index_start), |
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307 _region_index_end(region_index_end) {} |
0 | 308 |
309 void UpdateDensePrefixTask::do_it(GCTaskManager* manager, uint which) { | |
310 | |
10405 | 311 NOT_PRODUCT(GCTraceTime tm("UpdateDensePrefixTask", |
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312 PrintGCDetails && TraceParallelOldGCTasks, true, NULL, PSParallelCompact::gc_tracer()->gc_id())); |
0 | 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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319 _region_index_start, |
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320 _region_index_end); |
0 | 321 } |
322 | |
323 void DrainStacksCompactionTask::do_it(GCTaskManager* manager, uint which) { | |
324 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
325 | |
10405 | 326 NOT_PRODUCT(GCTraceTime tm("DrainStacksCompactionTask", |
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327 PrintGCDetails && TraceParallelOldGCTasks, true, NULL, PSParallelCompact::gc_tracer()->gc_id())); |
0 | 328 |
329 ParCompactionManager* cm = | |
330 ParCompactionManager::gc_thread_compaction_manager(which); | |
331 | |
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332 uint which_stack_index; |
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333 bool use_all_workers = manager->all_workers_active(); |
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334 if (use_all_workers) { |
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335 which_stack_index = which; |
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336 assert(manager->active_workers() == ParallelGCThreads, |
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337 err_msg("all_workers_active has been incorrectly set: " |
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338 " active %d ParallelGCThreads %d", manager->active_workers(), |
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339 ParallelGCThreads)); |
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340 } else { |
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341 which_stack_index = stack_index(); |
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342 } |
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343 |
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344 cm->set_region_stack(ParCompactionManager::region_list(which_stack_index)); |
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345 if (TraceDynamicGCThreads) { |
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346 gclog_or_tty->print_cr("DrainStacksCompactionTask::do_it which = %d " |
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347 "which_stack_index = %d/empty(%d) " |
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348 "use all workers %d", |
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349 which, which_stack_index, |
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350 cm->region_stack()->is_empty(), |
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351 use_all_workers); |
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352 } |
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353 |
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354 cm->set_region_stack_index(which_stack_index); |
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355 |
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356 // Process any regions already in the compaction managers stacks. |
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357 cm->drain_region_stacks(); |
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358 |
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359 assert(cm->region_stack()->is_empty(), "Not empty"); |
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360 |
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361 if (!use_all_workers) { |
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362 // Always give up the region stack. |
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363 assert(cm->region_stack() == |
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364 ParCompactionManager::region_list(cm->region_stack_index()), |
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365 "region_stack and region_stack_index are inconsistent"); |
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366 ParCompactionManager::push_recycled_stack_index(cm->region_stack_index()); |
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367 |
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368 if (TraceDynamicGCThreads) { |
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369 void* old_region_stack = (void*) cm->region_stack(); |
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370 int old_region_stack_index = cm->region_stack_index(); |
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371 gclog_or_tty->print_cr("Pushing region stack 0x%x/%d", |
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372 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 } |
0 | 378 } |