Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/psTasks.hpp @ 3285:49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
Summary: It introduces non-product cmd line parameter G1DummyRegionsPerGC which indicates how many "dummy" regions to allocate at the end of each GC. This allows the G1 heap to grow artificially and makes concurrent marking cycles more frequent irrespective of what the application that is running is doing. The dummy regions will be found totally empty during cleanup so this parameter can also be used to stress the concurrent cleanup operation.
Reviewed-by: brutisso, johnc
| author | tonyp |
|---|---|
| date | Tue, 19 Apr 2011 15:46:59 -0400 |
| parents | f95d63e2154a |
| children | bca17e38de00 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2002, 2010, 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_PSTASKS_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSTASKS_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 #include "utilities/growableArray.hpp" | |
| 30 | |
| 0 | 31 // |
| 32 // psTasks.hpp is a collection of GCTasks used by the | |
| 33 // parallelScavenge collector. | |
| 34 // | |
| 35 | |
| 36 class GCTask; | |
| 37 class OopClosure; | |
| 38 class OopStack; | |
| 39 class ObjectStartArray; | |
| 40 class ParallelTaskTerminator; | |
| 41 class MutableSpace; | |
| 42 class PSOldGen; | |
| 43 class Thread; | |
| 44 class VMThread; | |
| 45 | |
| 46 // | |
| 47 // ScavengeRootsTask | |
| 48 // | |
| 49 // This task scans all the roots of a given type. | |
| 50 // | |
| 51 // | |
| 52 | |
| 53 class ScavengeRootsTask : public GCTask { | |
| 54 public: | |
| 55 enum RootType { | |
| 56 universe = 1, | |
| 57 jni_handles = 2, | |
| 58 threads = 3, | |
| 59 object_synchronizer = 4, | |
| 60 flat_profiler = 5, | |
| 61 system_dictionary = 6, | |
| 62 management = 7, | |
| 989 | 63 jvmti = 8, |
| 64 code_cache = 9 | |
| 0 | 65 }; |
| 66 private: | |
| 67 RootType _root_type; | |
| 68 public: | |
| 69 ScavengeRootsTask(RootType value) : _root_type(value) {} | |
| 70 | |
| 71 char* name() { return (char *)"scavenge-roots-task"; } | |
| 72 | |
| 73 virtual void do_it(GCTaskManager* manager, uint which); | |
| 74 }; | |
| 75 | |
| 76 // | |
| 77 // ThreadRootsTask | |
| 78 // | |
| 79 // This task scans the roots of a single thread. This task | |
| 80 // enables scanning of thread roots in parallel. | |
| 81 // | |
| 82 | |
| 83 class ThreadRootsTask : public GCTask { | |
| 84 private: | |
| 85 JavaThread* _java_thread; | |
| 86 VMThread* _vm_thread; | |
| 87 public: | |
| 88 ThreadRootsTask(JavaThread* root) : _java_thread(root), _vm_thread(NULL) {} | |
| 89 ThreadRootsTask(VMThread* root) : _java_thread(NULL), _vm_thread(root) {} | |
| 90 | |
| 91 char* name() { return (char *)"thread-roots-task"; } | |
| 92 | |
| 93 virtual void do_it(GCTaskManager* manager, uint which); | |
| 94 }; | |
| 95 | |
| 96 // | |
| 97 // StealTask | |
| 98 // | |
| 99 // This task is used to distribute work to idle threads. | |
| 100 // | |
| 101 | |
| 102 class StealTask : public GCTask { | |
| 103 private: | |
| 104 ParallelTaskTerminator* const _terminator; | |
| 105 public: | |
| 106 char* name() { return (char *)"steal-task"; } | |
| 107 | |
| 108 StealTask(ParallelTaskTerminator* t); | |
| 109 | |
| 110 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 111 | |
| 112 virtual void do_it(GCTaskManager* manager, uint which); | |
| 113 }; | |
| 114 | |
| 115 // | |
| 116 // SerialOldToYoungRootsTask | |
| 117 // | |
| 118 // This task is used to scan for roots in the perm gen | |
| 119 | |
| 120 class SerialOldToYoungRootsTask : public GCTask { | |
| 121 private: | |
| 122 PSOldGen* _gen; | |
| 123 HeapWord* _gen_top; | |
| 124 | |
| 125 public: | |
| 126 SerialOldToYoungRootsTask(PSOldGen *gen, HeapWord* gen_top) : | |
| 127 _gen(gen), _gen_top(gen_top) { } | |
| 128 | |
| 129 char* name() { return (char *)"serial-old-to-young-roots-task"; } | |
| 130 | |
| 131 virtual void do_it(GCTaskManager* manager, uint which); | |
| 132 }; | |
| 133 | |
| 134 // | |
| 135 // OldToYoungRootsTask | |
| 136 // | |
| 137 // This task is used to scan old to young roots in parallel | |
| 138 | |
| 139 class OldToYoungRootsTask : public GCTask { | |
| 140 private: | |
| 141 PSOldGen* _gen; | |
| 142 HeapWord* _gen_top; | |
| 143 uint _stripe_number; | |
| 144 | |
| 145 public: | |
| 146 OldToYoungRootsTask(PSOldGen *gen, HeapWord* gen_top, uint stripe_number) : | |
| 147 _gen(gen), _gen_top(gen_top), _stripe_number(stripe_number) { } | |
| 148 | |
| 149 char* name() { return (char *)"old-to-young-roots-task"; } | |
| 150 | |
| 151 virtual void do_it(GCTaskManager* manager, uint which); | |
| 152 }; | |
| 1972 | 153 |
| 154 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSTASKS_HPP |