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annotate src/share/vm/gc_implementation/parallelScavenge/pcTasks.hpp @ 19083:09292c24d555
LSStackSlotAllocator: hide inner class.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Sat, 31 Jan 2015 11:07:15 +0100 |
parents | 89152779163c |
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0 | 1 /* |
17524 | 2 * Copyright (c) 2005, 2013, 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 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PCTASKS_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PCTASKS_HPP | |
27 | |
28 #include "gc_implementation/parallelScavenge/gcTaskManager.hpp" | |
29 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp" | |
30 #include "gc_implementation/parallelScavenge/psTasks.hpp" | |
31 | |
0 | 32 |
33 // Tasks for parallel compaction of the old generation | |
34 // | |
35 // Tasks are created and enqueued on a task queue. The | |
36 // tasks for parallel old collector for marking objects | |
37 // are MarkFromRootsTask and ThreadRootsMarkingTask. | |
38 // | |
39 // MarkFromRootsTask's are created | |
40 // with a root group (e.g., jni_handles) and when the do_it() | |
41 // method of a MarkFromRootsTask is executed, it starts marking | |
42 // form it's root group. | |
43 // | |
44 // ThreadRootsMarkingTask's are created for each Java thread. When | |
45 // the do_it() method of a ThreadRootsMarkingTask is executed, it | |
46 // starts marking from the thread's roots. | |
47 // | |
14909 | 48 // The enqueuing of the MarkFromRootsTask and ThreadRootsMarkingTask |
0 | 49 // do little more than create the task and put it on a queue. The |
50 // queue is a GCTaskQueue and threads steal tasks from this GCTaskQueue. | |
51 // | |
52 // In addition to the MarkFromRootsTask and ThreadRootsMarkingTask | |
53 // tasks there are StealMarkingTask tasks. The StealMarkingTask's | |
54 // steal a reference from the marking stack of another | |
55 // thread and transitively marks the object of the reference | |
56 // and internal references. After successfully stealing a reference | |
57 // and marking it, the StealMarkingTask drains its marking stack | |
58 // stack before attempting another steal. | |
59 // | |
60 // ThreadRootsMarkingTask | |
61 // | |
62 // This task marks from the roots of a single thread. This task | |
63 // enables marking of thread roots in parallel. | |
64 // | |
65 | |
66 class ParallelTaskTerminator; | |
67 | |
68 class ThreadRootsMarkingTask : public GCTask { | |
69 private: | |
70 JavaThread* _java_thread; | |
71 VMThread* _vm_thread; | |
72 public: | |
73 ThreadRootsMarkingTask(JavaThread* root) : _java_thread(root), _vm_thread(NULL) {} | |
74 ThreadRootsMarkingTask(VMThread* root) : _java_thread(NULL), _vm_thread(root) {} | |
75 | |
76 char* name() { return (char *)"thread-roots-marking-task"; } | |
77 | |
78 virtual void do_it(GCTaskManager* manager, uint which); | |
79 }; | |
80 | |
81 | |
82 // | |
83 // MarkFromRootsTask | |
84 // | |
85 // This task marks from all the roots to all live | |
86 // objects. | |
87 // | |
88 // | |
89 | |
90 class MarkFromRootsTask : public GCTask { | |
91 public: | |
92 enum RootType { | |
93 universe = 1, | |
94 jni_handles = 2, | |
95 threads = 3, | |
96 object_synchronizer = 4, | |
97 flat_profiler = 5, | |
98 management = 6, | |
99 jvmti = 7, | |
100 system_dictionary = 8, | |
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101 class_loader_data = 9, |
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102 code_cache = 10 |
0 | 103 }; |
104 private: | |
105 RootType _root_type; | |
106 public: | |
107 MarkFromRootsTask(RootType value) : _root_type(value) {} | |
108 | |
109 char* name() { return (char *)"mark-from-roots-task"; } | |
110 | |
111 virtual void do_it(GCTaskManager* manager, uint which); | |
112 }; | |
113 | |
114 // | |
115 // RefProcTaskProxy | |
116 // | |
117 // This task is used as a proxy to parallel reference processing tasks . | |
118 // | |
119 | |
120 class RefProcTaskProxy : public GCTask { | |
121 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; | |
122 ProcessTask & _rp_task; | |
123 uint _work_id; | |
124 public: | |
125 RefProcTaskProxy(ProcessTask & rp_task, uint work_id) | |
126 : _rp_task(rp_task), | |
127 _work_id(work_id) | |
128 { } | |
129 | |
130 private: | |
131 virtual char* name() { return (char *)"Process referents by policy in parallel"; } | |
132 | |
133 virtual void do_it(GCTaskManager* manager, uint which); | |
134 }; | |
135 | |
136 | |
137 | |
138 // | |
139 // RefEnqueueTaskProxy | |
140 // | |
141 // This task is used as a proxy to parallel reference processing tasks . | |
142 // | |
143 | |
144 class RefEnqueueTaskProxy: public GCTask { | |
145 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; | |
146 EnqueueTask& _enq_task; | |
147 uint _work_id; | |
148 | |
149 public: | |
150 RefEnqueueTaskProxy(EnqueueTask& enq_task, uint work_id) | |
151 : _enq_task(enq_task), | |
152 _work_id(work_id) | |
153 { } | |
154 | |
155 virtual char* name() { return (char *)"Enqueue reference objects in parallel"; } | |
156 virtual void do_it(GCTaskManager* manager, uint which) | |
157 { | |
158 _enq_task.work(_work_id); | |
159 } | |
160 }; | |
161 | |
162 | |
163 // | |
164 // RefProcTaskExecutor | |
165 // | |
166 // Task executor is an interface for the reference processor to run | |
167 // tasks using GCTaskManager. | |
168 // | |
169 | |
170 class RefProcTaskExecutor: public AbstractRefProcTaskExecutor { | |
171 virtual void execute(ProcessTask& task); | |
172 virtual void execute(EnqueueTask& task); | |
173 }; | |
174 | |
175 | |
176 // | |
177 // StealMarkingTask | |
178 // | |
179 // This task is used to distribute work to idle threads. | |
180 // | |
181 | |
182 class StealMarkingTask : public GCTask { | |
183 private: | |
184 ParallelTaskTerminator* const _terminator; | |
185 private: | |
186 | |
187 public: | |
188 char* name() { return (char *)"steal-marking-task"; } | |
189 | |
190 StealMarkingTask(ParallelTaskTerminator* t); | |
191 | |
192 ParallelTaskTerminator* terminator() { return _terminator; } | |
193 | |
194 virtual void do_it(GCTaskManager* manager, uint which); | |
195 }; | |
196 | |
197 // | |
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198 // StealRegionCompactionTask |
0 | 199 // |
200 // This task is used to distribute work to idle threads. | |
201 // | |
202 | |
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203 class StealRegionCompactionTask : public GCTask { |
0 | 204 private: |
205 ParallelTaskTerminator* const _terminator; | |
206 public: | |
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207 StealRegionCompactionTask(ParallelTaskTerminator* t); |
0 | 208 |
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209 char* name() { return (char *)"steal-region-task"; } |
0 | 210 ParallelTaskTerminator* terminator() { return _terminator; } |
211 | |
212 virtual void do_it(GCTaskManager* manager, uint which); | |
213 }; | |
214 | |
215 // | |
216 // UpdateDensePrefixTask | |
217 // | |
218 // This task is used to update the dense prefix | |
219 // of a space. | |
220 // | |
221 | |
222 class UpdateDensePrefixTask : public GCTask { | |
223 private: | |
224 PSParallelCompact::SpaceId _space_id; | |
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225 size_t _region_index_start; |
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226 size_t _region_index_end; |
0 | 227 |
228 public: | |
229 char* name() { return (char *)"update-dense_prefix-task"; } | |
230 | |
231 UpdateDensePrefixTask(PSParallelCompact::SpaceId space_id, | |
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232 size_t region_index_start, |
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233 size_t region_index_end); |
0 | 234 |
235 virtual void do_it(GCTaskManager* manager, uint which); | |
236 }; | |
237 | |
238 // | |
239 // DrainStacksCompactionTask | |
240 // | |
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241 // This task processes regions that have been added to the stacks of each |
0 | 242 // compaction manager. |
243 // | |
244 // Trying to use one draining thread does not work because there are no | |
245 // guarantees about which task will be picked up by which thread. For example, | |
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246 // if thread A gets all the preloaded regions, thread A may not get a draining |
0 | 247 // task (they may all be done by other threads). |
248 // | |
249 | |
250 class DrainStacksCompactionTask : public GCTask { | |
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251 uint _stack_index; |
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252 uint stack_index() { return _stack_index; } |
0 | 253 public: |
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254 DrainStacksCompactionTask(uint stack_index) : GCTask(), |
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255 _stack_index(stack_index) {}; |
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256 char* name() { return (char *)"drain-region-task"; } |
0 | 257 virtual void do_it(GCTaskManager* manager, uint which); |
258 }; | |
1972 | 259 |
260 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PCTASKS_HPP |