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comparison src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2005-2007 Sun Microsystems, Inc. All Rights Reserved.
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 // cm->allocate_stacks();
62 assert(cm->stacks_have_been_allocated(),
63 "Stack space has not been allocated");
64 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
65
66 switch (_root_type) {
67 case universe:
68 Universe::oops_do(&mark_and_push_closure);
69 break;
70
71 case reference_processing:
72 ReferenceProcessor::oops_do(&mark_and_push_closure);
73 break;
74
75 case jni_handles:
76 JNIHandles::oops_do(&mark_and_push_closure);
77 break;
78
79 case threads:
80 {
81 ResourceMark rm;
82 Threads::oops_do(&mark_and_push_closure);
83 }
84 break;
85
86 case object_synchronizer:
87 ObjectSynchronizer::oops_do(&mark_and_push_closure);
88 break;
89
90 case flat_profiler:
91 FlatProfiler::oops_do(&mark_and_push_closure);
92 break;
93
94 case management:
95 Management::oops_do(&mark_and_push_closure);
96 break;
97
98 case jvmti:
99 JvmtiExport::oops_do(&mark_and_push_closure);
100 break;
101
102 case system_dictionary:
103 SystemDictionary::always_strong_oops_do(&mark_and_push_closure);
104 break;
105
106 case vm_symbols:
107 vmSymbols::oops_do(&mark_and_push_closure);
108 break;
109
110 default:
111 fatal("Unknown root type");
112 }
113
114 // Do the real work
115 cm->drain_marking_stacks(&mark_and_push_closure);
116 // cm->deallocate_stacks();
117 }
118
119
120 //
121 // RefProcTaskProxy
122 //
123
124 void RefProcTaskProxy::do_it(GCTaskManager* manager, uint which)
125 {
126 assert(Universe::heap()->is_gc_active(), "called outside gc");
127
128 NOT_PRODUCT(TraceTime tm("RefProcTask",
129 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
130 ParCompactionManager* cm =
131 ParCompactionManager::gc_thread_compaction_manager(which);
132 // cm->allocate_stacks();
133 assert(cm->stacks_have_been_allocated(),
134 "Stack space has not been allocated");
135 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
136 PSParallelCompact::FollowStackClosure follow_stack_closure(cm);
137 _rp_task.work(_work_id, *PSParallelCompact::is_alive_closure(),
138 mark_and_push_closure, follow_stack_closure);
139 }
140
141 //
142 // RefProcTaskExecutor
143 //
144
145 void RefProcTaskExecutor::execute(ProcessTask& task)
146 {
147 ParallelScavengeHeap* heap = PSParallelCompact::gc_heap();
148 uint parallel_gc_threads = heap->gc_task_manager()->workers();
149 TaskQueueSetSuper* qset = ParCompactionManager::chunk_array();
150 ParallelTaskTerminator terminator(parallel_gc_threads, qset);
151 GCTaskQueue* q = GCTaskQueue::create();
152 for(uint i=0; i<parallel_gc_threads; i++) {
153 q->enqueue(new RefProcTaskProxy(task, i));
154 }
155 if (task.marks_oops_alive()) {
156 if (parallel_gc_threads>1) {
157 for (uint j=0; j<parallel_gc_threads; j++) {
158 q->enqueue(new StealMarkingTask(&terminator));
159 }
160 }
161 }
162 PSParallelCompact::gc_task_manager()->execute_and_wait(q);
163 }
164
165 void RefProcTaskExecutor::execute(EnqueueTask& task)
166 {
167 ParallelScavengeHeap* heap = PSParallelCompact::gc_heap();
168 uint parallel_gc_threads = heap->gc_task_manager()->workers();
169 GCTaskQueue* q = GCTaskQueue::create();
170 for(uint i=0; i<parallel_gc_threads; i++) {
171 q->enqueue(new RefEnqueueTaskProxy(task, i));
172 }
173 PSParallelCompact::gc_task_manager()->execute_and_wait(q);
174 }
175
176 //
177 // StealMarkingTask
178 //
179
180 StealMarkingTask::StealMarkingTask(ParallelTaskTerminator* t) :
181 _terminator(t) {}
182
183 void StealMarkingTask::do_it(GCTaskManager* manager, uint which) {
184 assert(Universe::heap()->is_gc_active(), "called outside gc");
185
186 NOT_PRODUCT(TraceTime tm("StealMarkingTask",
187 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
188
189 ParCompactionManager* cm =
190 ParCompactionManager::gc_thread_compaction_manager(which);
191 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
192
193 oop obj = NULL;
194 int random_seed = 17;
195 while(true) {
196 if (ParCompactionManager::steal(which, &random_seed, obj)) {
197 obj->follow_contents(cm);
198 cm->drain_marking_stacks(&mark_and_push_closure);
199 } else {
200 if (terminator()->offer_termination()) {
201 break;
202 }
203 }
204 }
205 }
206
207 //
208 // StealChunkCompactionTask
209 //
210
211
212 StealChunkCompactionTask::StealChunkCompactionTask(ParallelTaskTerminator* t) :
213 _terminator(t) {};
214
215 void StealChunkCompactionTask::do_it(GCTaskManager* manager, uint which) {
216 assert(Universe::heap()->is_gc_active(), "called outside gc");
217
218 NOT_PRODUCT(TraceTime tm("StealChunkCompactionTask",
219 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
220
221 ParCompactionManager* cm =
222 ParCompactionManager::gc_thread_compaction_manager(which);
223
224 // Has to drain stacks first because there may be chunks on
225 // preloaded onto the stack and this thread may never have
226 // done a draining task. Are the draining tasks needed?
227
228 cm->drain_chunk_stacks();
229
230 size_t chunk_index = 0;
231 int random_seed = 17;
232
233 // If we're the termination task, try 10 rounds of stealing before
234 // setting the termination flag
235
236 while(true) {
237 if (ParCompactionManager::steal(which, &random_seed, chunk_index)) {
238 PSParallelCompact::fill_and_update_chunk(cm, chunk_index);
239 cm->drain_chunk_stacks();
240 } else {
241 if (terminator()->offer_termination()) {
242 break;
243 }
244 // Go around again.
245 }
246 }
247 return;
248 }
249
250 UpdateDensePrefixTask::UpdateDensePrefixTask(
251 PSParallelCompact::SpaceId space_id,
252 size_t chunk_index_start,
253 size_t chunk_index_end) :
254 _space_id(space_id), _chunk_index_start(chunk_index_start),
255 _chunk_index_end(chunk_index_end)
256 {}
257
258 void UpdateDensePrefixTask::do_it(GCTaskManager* manager, uint which) {
259
260 NOT_PRODUCT(TraceTime tm("UpdateDensePrefixTask",
261 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
262
263 ParCompactionManager* cm =
264 ParCompactionManager::gc_thread_compaction_manager(which);
265
266 PSParallelCompact::update_and_deadwood_in_dense_prefix(cm,
267 _space_id,
268 _chunk_index_start,
269 _chunk_index_end);
270 }
271
272 void DrainStacksCompactionTask::do_it(GCTaskManager* manager, uint which) {
273 assert(Universe::heap()->is_gc_active(), "called outside gc");
274
275 NOT_PRODUCT(TraceTime tm("DrainStacksCompactionTask",
276 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
277
278 ParCompactionManager* cm =
279 ParCompactionManager::gc_thread_compaction_manager(which);
280
281 // Process any chunks already in the compaction managers stacks.
282 cm->drain_chunk_stacks();
283 }