Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp @ 941:8b46c4d82093
4957990: Perm heap bloat in JVM
Summary: Treat ProfileData in MDO's as a source of weak, not strong, roots. Fixes the bug for stop-world collection -- the case of concurrent collection will be fixed separately.
Reviewed-by: jcoomes, jmasa, kvn, never
author | ysr |
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date | Wed, 02 Sep 2009 00:04:29 -0700 |
parents | 81cd571500b0 |
children | 89e0543e1737 54b3b351d6f9 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 2005-2008 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_pcTasks.cpp.incl" | |
27 | |
28 // | |
29 // ThreadRootsMarkingTask | |
30 // | |
31 | |
32 void ThreadRootsMarkingTask::do_it(GCTaskManager* manager, uint which) { | |
33 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
34 | |
35 ResourceMark rm; | |
36 | |
37 NOT_PRODUCT(TraceTime tm("ThreadRootsMarkingTask", | |
38 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
39 ParCompactionManager* cm = | |
40 ParCompactionManager::gc_thread_compaction_manager(which); | |
41 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); | |
42 | |
43 if (_java_thread != NULL) | |
44 _java_thread->oops_do(&mark_and_push_closure); | |
45 | |
46 if (_vm_thread != NULL) | |
47 _vm_thread->oops_do(&mark_and_push_closure); | |
48 | |
49 // Do the real work | |
50 cm->drain_marking_stacks(&mark_and_push_closure); | |
51 } | |
52 | |
53 | |
54 void MarkFromRootsTask::do_it(GCTaskManager* manager, uint which) { | |
55 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
56 | |
57 NOT_PRODUCT(TraceTime tm("MarkFromRootsTask", | |
58 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
59 ParCompactionManager* cm = | |
60 ParCompactionManager::gc_thread_compaction_manager(which); | |
61 assert(cm->stacks_have_been_allocated(), | |
941 | 62 "Stack space has not been allocated"); |
0 | 63 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); |
64 | |
65 switch (_root_type) { | |
66 case universe: | |
67 Universe::oops_do(&mark_and_push_closure); | |
68 break; | |
69 | |
70 case reference_processing: | |
71 ReferenceProcessor::oops_do(&mark_and_push_closure); | |
72 break; | |
73 | |
74 case jni_handles: | |
75 JNIHandles::oops_do(&mark_and_push_closure); | |
76 break; | |
77 | |
78 case threads: | |
79 { | |
80 ResourceMark rm; | |
81 Threads::oops_do(&mark_and_push_closure); | |
82 } | |
83 break; | |
84 | |
85 case object_synchronizer: | |
86 ObjectSynchronizer::oops_do(&mark_and_push_closure); | |
87 break; | |
88 | |
89 case flat_profiler: | |
90 FlatProfiler::oops_do(&mark_and_push_closure); | |
91 break; | |
92 | |
93 case management: | |
94 Management::oops_do(&mark_and_push_closure); | |
95 break; | |
96 | |
97 case jvmti: | |
98 JvmtiExport::oops_do(&mark_and_push_closure); | |
99 break; | |
100 | |
101 case system_dictionary: | |
102 SystemDictionary::always_strong_oops_do(&mark_and_push_closure); | |
103 break; | |
104 | |
105 case vm_symbols: | |
106 vmSymbols::oops_do(&mark_and_push_closure); | |
107 break; | |
108 | |
109 default: | |
110 fatal("Unknown root type"); | |
111 } | |
112 | |
113 // Do the real work | |
114 cm->drain_marking_stacks(&mark_and_push_closure); | |
115 // cm->deallocate_stacks(); | |
116 } | |
117 | |
118 | |
119 // | |
120 // RefProcTaskProxy | |
121 // | |
122 | |
123 void RefProcTaskProxy::do_it(GCTaskManager* manager, uint which) | |
124 { | |
125 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
126 | |
127 NOT_PRODUCT(TraceTime tm("RefProcTask", | |
128 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
129 ParCompactionManager* cm = | |
130 ParCompactionManager::gc_thread_compaction_manager(which); | |
131 assert(cm->stacks_have_been_allocated(), | |
941 | 132 "Stack space has not been allocated"); |
0 | 133 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); |
134 PSParallelCompact::FollowStackClosure follow_stack_closure(cm); | |
135 _rp_task.work(_work_id, *PSParallelCompact::is_alive_closure(), | |
136 mark_and_push_closure, follow_stack_closure); | |
137 } | |
138 | |
139 // | |
140 // RefProcTaskExecutor | |
141 // | |
142 | |
143 void RefProcTaskExecutor::execute(ProcessTask& task) | |
144 { | |
145 ParallelScavengeHeap* heap = PSParallelCompact::gc_heap(); | |
146 uint parallel_gc_threads = heap->gc_task_manager()->workers(); | |
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147 RegionTaskQueueSet* qset = ParCompactionManager::region_array(); |
0 | 148 ParallelTaskTerminator terminator(parallel_gc_threads, qset); |
149 GCTaskQueue* q = GCTaskQueue::create(); | |
150 for(uint i=0; i<parallel_gc_threads; i++) { | |
151 q->enqueue(new RefProcTaskProxy(task, i)); | |
152 } | |
153 if (task.marks_oops_alive()) { | |
154 if (parallel_gc_threads>1) { | |
155 for (uint j=0; j<parallel_gc_threads; j++) { | |
156 q->enqueue(new StealMarkingTask(&terminator)); | |
157 } | |
158 } | |
159 } | |
160 PSParallelCompact::gc_task_manager()->execute_and_wait(q); | |
161 } | |
162 | |
163 void RefProcTaskExecutor::execute(EnqueueTask& task) | |
164 { | |
165 ParallelScavengeHeap* heap = PSParallelCompact::gc_heap(); | |
166 uint parallel_gc_threads = heap->gc_task_manager()->workers(); | |
167 GCTaskQueue* q = GCTaskQueue::create(); | |
168 for(uint i=0; i<parallel_gc_threads; i++) { | |
169 q->enqueue(new RefEnqueueTaskProxy(task, i)); | |
170 } | |
171 PSParallelCompact::gc_task_manager()->execute_and_wait(q); | |
172 } | |
173 | |
174 // | |
175 // StealMarkingTask | |
176 // | |
177 | |
178 StealMarkingTask::StealMarkingTask(ParallelTaskTerminator* t) : | |
179 _terminator(t) {} | |
180 | |
181 void StealMarkingTask::do_it(GCTaskManager* manager, uint which) { | |
182 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
183 | |
184 NOT_PRODUCT(TraceTime tm("StealMarkingTask", | |
185 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
186 | |
187 ParCompactionManager* cm = | |
188 ParCompactionManager::gc_thread_compaction_manager(which); | |
189 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); | |
190 | |
191 oop obj = NULL; | |
192 int random_seed = 17; | |
193 while(true) { | |
194 if (ParCompactionManager::steal(which, &random_seed, obj)) { | |
195 obj->follow_contents(cm); | |
196 cm->drain_marking_stacks(&mark_and_push_closure); | |
197 } else { | |
198 if (terminator()->offer_termination()) { | |
199 break; | |
200 } | |
201 } | |
202 } | |
203 } | |
204 | |
205 // | |
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206 // StealRegionCompactionTask |
0 | 207 // |
208 | |
209 | |
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210 StealRegionCompactionTask::StealRegionCompactionTask(ParallelTaskTerminator* t): |
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211 _terminator(t) {} |
0 | 212 |
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213 void StealRegionCompactionTask::do_it(GCTaskManager* manager, uint which) { |
0 | 214 assert(Universe::heap()->is_gc_active(), "called outside gc"); |
215 | |
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216 NOT_PRODUCT(TraceTime tm("StealRegionCompactionTask", |
0 | 217 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); |
218 | |
219 ParCompactionManager* cm = | |
220 ParCompactionManager::gc_thread_compaction_manager(which); | |
221 | |
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222 // Has to drain stacks first because there may be regions on |
0 | 223 // preloaded onto the stack and this thread may never have |
224 // done a draining task. Are the draining tasks needed? | |
225 | |
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226 cm->drain_region_stacks(); |
0 | 227 |
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228 size_t region_index = 0; |
0 | 229 int random_seed = 17; |
230 | |
231 // If we're the termination task, try 10 rounds of stealing before | |
232 // setting the termination flag | |
233 | |
234 while(true) { | |
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235 if (ParCompactionManager::steal(which, &random_seed, region_index)) { |
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236 PSParallelCompact::fill_and_update_region(cm, region_index); |
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237 cm->drain_region_stacks(); |
0 | 238 } else { |
239 if (terminator()->offer_termination()) { | |
240 break; | |
241 } | |
242 // Go around again. | |
243 } | |
244 } | |
245 return; | |
246 } | |
247 | |
248 UpdateDensePrefixTask::UpdateDensePrefixTask( | |
249 PSParallelCompact::SpaceId space_id, | |
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250 size_t region_index_start, |
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251 size_t region_index_end) : |
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252 _space_id(space_id), _region_index_start(region_index_start), |
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253 _region_index_end(region_index_end) {} |
0 | 254 |
255 void UpdateDensePrefixTask::do_it(GCTaskManager* manager, uint which) { | |
256 | |
257 NOT_PRODUCT(TraceTime tm("UpdateDensePrefixTask", | |
258 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
259 | |
260 ParCompactionManager* cm = | |
261 ParCompactionManager::gc_thread_compaction_manager(which); | |
262 | |
263 PSParallelCompact::update_and_deadwood_in_dense_prefix(cm, | |
264 _space_id, | |
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265 _region_index_start, |
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266 _region_index_end); |
0 | 267 } |
268 | |
269 void DrainStacksCompactionTask::do_it(GCTaskManager* manager, uint which) { | |
270 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
271 | |
272 NOT_PRODUCT(TraceTime tm("DrainStacksCompactionTask", | |
273 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); | |
274 | |
275 ParCompactionManager* cm = | |
276 ParCompactionManager::gc_thread_compaction_manager(which); | |
277 | |
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278 // Process any regions already in the compaction managers stacks. |
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279 cm->drain_region_stacks(); |
0 | 280 } |