Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/psTasks.cpp @ 10180:ebded0261dfc
8012111: Remove warning about CMS generation shrinking.
Reviewed-by: johnc, brutisso, stefank
author | jmasa |
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date | Mon, 22 Apr 2013 22:00:03 -0700 |
parents | d0aa87f04bd5 |
children | eda078b01c65 |
rev | line source |
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0 | 1 /* |
4909 | 2 * Copyright (c) 2002, 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/cardTableExtension.hpp" | |
29 #include "gc_implementation/parallelScavenge/gcTaskManager.hpp" | |
30 #include "gc_implementation/parallelScavenge/psMarkSweep.hpp" | |
31 #include "gc_implementation/parallelScavenge/psPromotionManager.hpp" | |
32 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" | |
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33 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" |
1972 | 34 #include "gc_implementation/parallelScavenge/psTasks.hpp" |
35 #include "memory/iterator.hpp" | |
36 #include "memory/universe.hpp" | |
37 #include "oops/oop.inline.hpp" | |
38 #include "oops/oop.psgc.inline.hpp" | |
39 #include "runtime/fprofiler.hpp" | |
40 #include "runtime/thread.hpp" | |
41 #include "runtime/vmThread.hpp" | |
42 #include "services/management.hpp" | |
43 #include "utilities/taskqueue.hpp" | |
0 | 44 |
45 // | |
46 // ScavengeRootsTask | |
47 // | |
48 | |
49 void ScavengeRootsTask::do_it(GCTaskManager* manager, uint which) { | |
50 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
51 | |
52 PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which); | |
53 PSScavengeRootsClosure roots_closure(pm); | |
4909 | 54 PSPromoteRootsClosure roots_to_old_closure(pm); |
0 | 55 |
56 switch (_root_type) { | |
57 case universe: | |
58 Universe::oops_do(&roots_closure); | |
59 break; | |
60 | |
61 case jni_handles: | |
62 JNIHandles::oops_do(&roots_closure); | |
63 break; | |
64 | |
65 case threads: | |
66 { | |
67 ResourceMark rm; | |
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68 CLDToOopClosure* cld_closure = NULL; // Not needed. All CLDs are already visited. |
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69 Threads::oops_do(&roots_closure, cld_closure, NULL); |
0 | 70 } |
71 break; | |
72 | |
73 case object_synchronizer: | |
74 ObjectSynchronizer::oops_do(&roots_closure); | |
75 break; | |
76 | |
77 case flat_profiler: | |
78 FlatProfiler::oops_do(&roots_closure); | |
79 break; | |
80 | |
81 case system_dictionary: | |
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82 { |
0 | 83 SystemDictionary::oops_do(&roots_closure); |
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84 |
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85 // Move this to another root_type? |
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86 PSScavengeKlassClosure klass_closure(pm); |
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87 ClassLoaderDataGraph::oops_do(&roots_closure, &klass_closure, false); |
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88 } |
0 | 89 break; |
90 | |
91 case management: | |
92 Management::oops_do(&roots_closure); | |
93 break; | |
94 | |
95 case jvmti: | |
96 JvmtiExport::oops_do(&roots_closure); | |
97 break; | |
98 | |
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99 |
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100 case code_cache: |
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101 { |
4909 | 102 CodeBlobToOopClosure each_scavengable_code_blob(&roots_to_old_closure, /*do_marking=*/ true); |
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103 CodeCache::scavenge_root_nmethods_do(&each_scavengable_code_blob); |
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104 } |
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105 break; |
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106 |
0 | 107 default: |
108 fatal("Unknown root type"); | |
109 } | |
110 | |
111 // Do the real work | |
112 pm->drain_stacks(false); | |
113 } | |
114 | |
115 // | |
116 // ThreadRootsTask | |
117 // | |
118 | |
119 void ThreadRootsTask::do_it(GCTaskManager* manager, uint which) { | |
120 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
121 | |
122 PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which); | |
123 PSScavengeRootsClosure roots_closure(pm); | |
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124 CLDToOopClosure* roots_from_clds = NULL; // Not needed. All CLDs are already visited. |
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125 CodeBlobToOopClosure roots_in_blobs(&roots_closure, /*do_marking=*/ true); |
0 | 126 |
127 if (_java_thread != NULL) | |
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128 _java_thread->oops_do(&roots_closure, roots_from_clds, &roots_in_blobs); |
0 | 129 |
130 if (_vm_thread != NULL) | |
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131 _vm_thread->oops_do(&roots_closure, roots_from_clds, &roots_in_blobs); |
0 | 132 |
133 // Do the real work | |
134 pm->drain_stacks(false); | |
135 } | |
136 | |
137 // | |
138 // StealTask | |
139 // | |
140 | |
141 StealTask::StealTask(ParallelTaskTerminator* t) : | |
142 _terminator(t) {} | |
143 | |
144 void StealTask::do_it(GCTaskManager* manager, uint which) { | |
145 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
146 | |
147 PSPromotionManager* pm = | |
148 PSPromotionManager::gc_thread_promotion_manager(which); | |
149 pm->drain_stacks(true); | |
150 guarantee(pm->stacks_empty(), | |
151 "stacks should be empty at this point"); | |
152 | |
153 int random_seed = 17; | |
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154 while(true) { |
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155 StarTask p; |
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156 if (PSPromotionManager::steal_depth(which, &random_seed, p)) { |
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157 TASKQUEUE_STATS_ONLY(pm->record_steal(p)); |
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158 pm->process_popped_location_depth(p); |
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159 pm->drain_stacks_depth(true); |
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160 } else { |
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161 if (terminator()->offer_termination()) { |
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162 break; |
0 | 163 } |
164 } | |
165 } | |
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166 guarantee(pm->stacks_empty(), "stacks should be empty at this point"); |
0 | 167 } |
168 | |
169 // | |
170 // OldToYoungRootsTask | |
171 // | |
172 | |
173 void OldToYoungRootsTask::do_it(GCTaskManager* manager, uint which) { | |
6817 | 174 // There are not old-to-young pointers if the old gen is empty. |
175 assert(!_gen->object_space()->is_empty(), | |
176 "Should not be called is there is no work"); | |
0 | 177 assert(_gen != NULL, "Sanity"); |
178 assert(_gen->object_space()->contains(_gen_top) || _gen_top == _gen->object_space()->top(), "Sanity"); | |
179 assert(_stripe_number < ParallelGCThreads, "Sanity"); | |
180 | |
181 { | |
182 PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which); | |
183 | |
184 assert(Universe::heap()->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
185 CardTableExtension* card_table = (CardTableExtension *)Universe::heap()->barrier_set(); | |
186 // FIX ME! Assert that card_table is the type we believe it to be. | |
187 | |
188 card_table->scavenge_contents_parallel(_gen->start_array(), | |
189 _gen->object_space(), | |
190 _gen_top, | |
191 pm, | |
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192 _stripe_number, |
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193 _stripe_total); |
0 | 194 |
195 // Do the real work | |
196 pm->drain_stacks(false); | |
197 } | |
198 } |