Thu, 14 Mar 2013 09:37:38 +0100
6733980: par compact - TraceGen1Time always shows 0.0000 seconds
Summary: Use the correct collector to retrieve accumulated gen1 trace time
Reviewed-by: johnc, jmasa
1 /*
2 * Copyright (c) 2005, 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
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23 */
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"
42 //
43 // ThreadRootsMarkingTask
44 //
46 void ThreadRootsMarkingTask::do_it(GCTaskManager* manager, uint which) {
47 assert(Universe::heap()->is_gc_active(), "called outside gc");
49 ResourceMark rm;
51 NOT_PRODUCT(TraceTime tm("ThreadRootsMarkingTask",
52 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
53 ParCompactionManager* cm =
54 ParCompactionManager::gc_thread_compaction_manager(which);
56 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
57 CLDToOopClosure mark_and_push_from_clds(&mark_and_push_closure, true);
58 CodeBlobToOopClosure mark_and_push_in_blobs(&mark_and_push_closure, /*do_marking=*/ true);
60 if (_java_thread != NULL)
61 _java_thread->oops_do(
62 &mark_and_push_closure,
63 &mark_and_push_from_clds,
64 &mark_and_push_in_blobs);
66 if (_vm_thread != NULL)
67 _vm_thread->oops_do(
68 &mark_and_push_closure,
69 &mark_and_push_from_clds,
70 &mark_and_push_in_blobs);
72 // Do the real work
73 cm->follow_marking_stacks();
74 }
77 void MarkFromRootsTask::do_it(GCTaskManager* manager, uint which) {
78 assert(Universe::heap()->is_gc_active(), "called outside gc");
80 NOT_PRODUCT(TraceTime tm("MarkFromRootsTask",
81 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
82 ParCompactionManager* cm =
83 ParCompactionManager::gc_thread_compaction_manager(which);
84 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
85 PSParallelCompact::FollowKlassClosure follow_klass_closure(&mark_and_push_closure);
87 switch (_root_type) {
88 case universe:
89 Universe::oops_do(&mark_and_push_closure);
90 break;
92 case jni_handles:
93 JNIHandles::oops_do(&mark_and_push_closure);
94 break;
96 case threads:
97 {
98 ResourceMark rm;
99 CodeBlobToOopClosure each_active_code_blob(&mark_and_push_closure, /*do_marking=*/ true);
100 CLDToOopClosure mark_and_push_from_cld(&mark_and_push_closure);
101 Threads::oops_do(&mark_and_push_closure, &mark_and_push_from_cld, &each_active_code_blob);
102 }
103 break;
105 case object_synchronizer:
106 ObjectSynchronizer::oops_do(&mark_and_push_closure);
107 break;
109 case flat_profiler:
110 FlatProfiler::oops_do(&mark_and_push_closure);
111 break;
113 case management:
114 Management::oops_do(&mark_and_push_closure);
115 break;
117 case jvmti:
118 JvmtiExport::oops_do(&mark_and_push_closure);
119 break;
121 case system_dictionary:
122 SystemDictionary::always_strong_oops_do(&mark_and_push_closure);
123 ClassLoaderDataGraph::always_strong_oops_do(&mark_and_push_closure, &follow_klass_closure, true);
124 break;
126 case code_cache:
127 // Do not treat nmethods as strong roots for mark/sweep, since we can unload them.
128 //CodeCache::scavenge_root_nmethods_do(CodeBlobToOopClosure(&mark_and_push_closure));
129 break;
131 default:
132 fatal("Unknown root type");
133 }
135 // Do the real work
136 cm->follow_marking_stacks();
137 }
140 //
141 // RefProcTaskProxy
142 //
144 void RefProcTaskProxy::do_it(GCTaskManager* manager, uint which)
145 {
146 assert(Universe::heap()->is_gc_active(), "called outside gc");
148 NOT_PRODUCT(TraceTime tm("RefProcTask",
149 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
150 ParCompactionManager* cm =
151 ParCompactionManager::gc_thread_compaction_manager(which);
152 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
153 PSParallelCompact::FollowStackClosure follow_stack_closure(cm);
154 _rp_task.work(_work_id, *PSParallelCompact::is_alive_closure(),
155 mark_and_push_closure, follow_stack_closure);
156 }
158 //
159 // RefProcTaskExecutor
160 //
162 void RefProcTaskExecutor::execute(ProcessTask& task)
163 {
164 ParallelScavengeHeap* heap = PSParallelCompact::gc_heap();
165 uint parallel_gc_threads = heap->gc_task_manager()->workers();
166 uint active_gc_threads = heap->gc_task_manager()->active_workers();
167 RegionTaskQueueSet* qset = ParCompactionManager::region_array();
168 ParallelTaskTerminator terminator(active_gc_threads, qset);
169 GCTaskQueue* q = GCTaskQueue::create();
170 for(uint i=0; i<parallel_gc_threads; i++) {
171 q->enqueue(new RefProcTaskProxy(task, i));
172 }
173 if (task.marks_oops_alive()) {
174 if (parallel_gc_threads>1) {
175 for (uint j=0; j<active_gc_threads; j++) {
176 q->enqueue(new StealMarkingTask(&terminator));
177 }
178 }
179 }
180 PSParallelCompact::gc_task_manager()->execute_and_wait(q);
181 }
183 void RefProcTaskExecutor::execute(EnqueueTask& task)
184 {
185 ParallelScavengeHeap* heap = PSParallelCompact::gc_heap();
186 uint parallel_gc_threads = heap->gc_task_manager()->workers();
187 GCTaskQueue* q = GCTaskQueue::create();
188 for(uint i=0; i<parallel_gc_threads; i++) {
189 q->enqueue(new RefEnqueueTaskProxy(task, i));
190 }
191 PSParallelCompact::gc_task_manager()->execute_and_wait(q);
192 }
194 //
195 // StealMarkingTask
196 //
198 StealMarkingTask::StealMarkingTask(ParallelTaskTerminator* t) :
199 _terminator(t) {}
201 void StealMarkingTask::do_it(GCTaskManager* manager, uint which) {
202 assert(Universe::heap()->is_gc_active(), "called outside gc");
204 NOT_PRODUCT(TraceTime tm("StealMarkingTask",
205 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
207 ParCompactionManager* cm =
208 ParCompactionManager::gc_thread_compaction_manager(which);
209 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
211 oop obj = NULL;
212 ObjArrayTask task;
213 int random_seed = 17;
214 do {
215 while (ParCompactionManager::steal_objarray(which, &random_seed, task)) {
216 ObjArrayKlass* const k = (ObjArrayKlass*)task.obj()->klass();
217 k->oop_follow_contents(cm, task.obj(), task.index());
218 cm->follow_marking_stacks();
219 }
220 while (ParCompactionManager::steal(which, &random_seed, obj)) {
221 obj->follow_contents(cm);
222 cm->follow_marking_stacks();
223 }
224 } while (!terminator()->offer_termination());
225 }
227 //
228 // StealRegionCompactionTask
229 //
231 StealRegionCompactionTask::StealRegionCompactionTask(ParallelTaskTerminator* t):
232 _terminator(t) {}
234 void StealRegionCompactionTask::do_it(GCTaskManager* manager, uint which) {
235 assert(Universe::heap()->is_gc_active(), "called outside gc");
237 NOT_PRODUCT(TraceTime tm("StealRegionCompactionTask",
238 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
240 ParCompactionManager* cm =
241 ParCompactionManager::gc_thread_compaction_manager(which);
244 // If not all threads are active, get a draining stack
245 // from the list. Else, just use this threads draining stack.
246 uint which_stack_index;
247 bool use_all_workers = manager->all_workers_active();
248 if (use_all_workers) {
249 which_stack_index = which;
250 assert(manager->active_workers() == ParallelGCThreads,
251 err_msg("all_workers_active has been incorrectly set: "
252 " active %d ParallelGCThreads %d", manager->active_workers(),
253 ParallelGCThreads));
254 } else {
255 which_stack_index = ParCompactionManager::pop_recycled_stack_index();
256 }
258 cm->set_region_stack_index(which_stack_index);
259 cm->set_region_stack(ParCompactionManager::region_list(which_stack_index));
260 if (TraceDynamicGCThreads) {
261 gclog_or_tty->print_cr("StealRegionCompactionTask::do_it "
262 "region_stack_index %d region_stack = 0x%x "
263 " empty (%d) use all workers %d",
264 which_stack_index, ParCompactionManager::region_list(which_stack_index),
265 cm->region_stack()->is_empty(),
266 use_all_workers);
267 }
269 // Has to drain stacks first because there may be regions on
270 // preloaded onto the stack and this thread may never have
271 // done a draining task. Are the draining tasks needed?
273 cm->drain_region_stacks();
275 size_t region_index = 0;
276 int random_seed = 17;
278 // If we're the termination task, try 10 rounds of stealing before
279 // setting the termination flag
281 while(true) {
282 if (ParCompactionManager::steal(which, &random_seed, region_index)) {
283 PSParallelCompact::fill_and_update_region(cm, region_index);
284 cm->drain_region_stacks();
285 } else {
286 if (terminator()->offer_termination()) {
287 break;
288 }
289 // Go around again.
290 }
291 }
292 return;
293 }
295 UpdateDensePrefixTask::UpdateDensePrefixTask(
296 PSParallelCompact::SpaceId space_id,
297 size_t region_index_start,
298 size_t region_index_end) :
299 _space_id(space_id), _region_index_start(region_index_start),
300 _region_index_end(region_index_end) {}
302 void UpdateDensePrefixTask::do_it(GCTaskManager* manager, uint which) {
304 NOT_PRODUCT(TraceTime tm("UpdateDensePrefixTask",
305 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
307 ParCompactionManager* cm =
308 ParCompactionManager::gc_thread_compaction_manager(which);
310 PSParallelCompact::update_and_deadwood_in_dense_prefix(cm,
311 _space_id,
312 _region_index_start,
313 _region_index_end);
314 }
316 void DrainStacksCompactionTask::do_it(GCTaskManager* manager, uint which) {
317 assert(Universe::heap()->is_gc_active(), "called outside gc");
319 NOT_PRODUCT(TraceTime tm("DrainStacksCompactionTask",
320 PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
322 ParCompactionManager* cm =
323 ParCompactionManager::gc_thread_compaction_manager(which);
325 uint which_stack_index;
326 bool use_all_workers = manager->all_workers_active();
327 if (use_all_workers) {
328 which_stack_index = which;
329 assert(manager->active_workers() == ParallelGCThreads,
330 err_msg("all_workers_active has been incorrectly set: "
331 " active %d ParallelGCThreads %d", manager->active_workers(),
332 ParallelGCThreads));
333 } else {
334 which_stack_index = stack_index();
335 }
337 cm->set_region_stack(ParCompactionManager::region_list(which_stack_index));
338 if (TraceDynamicGCThreads) {
339 gclog_or_tty->print_cr("DrainStacksCompactionTask::do_it which = %d "
340 "which_stack_index = %d/empty(%d) "
341 "use all workers %d",
342 which, which_stack_index,
343 cm->region_stack()->is_empty(),
344 use_all_workers);
345 }
347 cm->set_region_stack_index(which_stack_index);
349 // Process any regions already in the compaction managers stacks.
350 cm->drain_region_stacks();
352 assert(cm->region_stack()->is_empty(), "Not empty");
354 if (!use_all_workers) {
355 // Always give up the region stack.
356 assert(cm->region_stack() ==
357 ParCompactionManager::region_list(cm->region_stack_index()),
358 "region_stack and region_stack_index are inconsistent");
359 ParCompactionManager::push_recycled_stack_index(cm->region_stack_index());
361 if (TraceDynamicGCThreads) {
362 void* old_region_stack = (void*) cm->region_stack();
363 int old_region_stack_index = cm->region_stack_index();
364 gclog_or_tty->print_cr("Pushing region stack 0x%x/%d",
365 old_region_stack, old_region_stack_index);
366 }
368 cm->set_region_stack(NULL);
369 cm->set_region_stack_index((uint)max_uintx);
370 }
371 }