Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.cpp @ 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 | f08d439fab8c |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2007, 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 #include "precompiled.hpp" |
| 26 #include "gc_implementation/concurrentMarkSweep/cmsAdaptiveSizePolicy.hpp" | |
| 27 #include "gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.hpp" | |
| 28 #include "gc_implementation/concurrentMarkSweep/cmsGCAdaptivePolicyCounters.hpp" | |
| 29 #include "gc_implementation/parNew/parNewGeneration.hpp" | |
| 30 #include "gc_implementation/shared/gcPolicyCounters.hpp" | |
| 31 #include "gc_implementation/shared/vmGCOperations.hpp" | |
| 32 #include "memory/cardTableRS.hpp" | |
| 33 #include "memory/collectorPolicy.hpp" | |
| 34 #include "memory/gcLocker.inline.hpp" | |
| 35 #include "memory/genCollectedHeap.hpp" | |
| 36 #include "memory/generationSpec.hpp" | |
| 37 #include "memory/space.hpp" | |
| 38 #include "memory/universe.hpp" | |
| 39 #include "runtime/arguments.hpp" | |
| 40 #include "runtime/globals_extension.hpp" | |
| 41 #include "runtime/handles.inline.hpp" | |
| 42 #include "runtime/java.hpp" | |
| 43 #include "runtime/vmThread.hpp" | |
| 44 #ifdef TARGET_OS_FAMILY_linux | |
| 45 # include "thread_linux.inline.hpp" | |
| 46 #endif | |
| 47 #ifdef TARGET_OS_FAMILY_solaris | |
| 48 # include "thread_solaris.inline.hpp" | |
| 49 #endif | |
| 50 #ifdef TARGET_OS_FAMILY_windows | |
| 51 # include "thread_windows.inline.hpp" | |
| 52 #endif | |
| 0 | 53 |
| 54 // | |
| 55 // ConcurrentMarkSweepPolicy methods | |
| 56 // | |
| 57 | |
| 58 ConcurrentMarkSweepPolicy::ConcurrentMarkSweepPolicy() { | |
| 59 initialize_all(); | |
| 60 } | |
| 61 | |
| 62 void ConcurrentMarkSweepPolicy::initialize_generations() { | |
| 63 initialize_perm_generation(PermGen::ConcurrentMarkSweep); | |
| 64 _generations = new GenerationSpecPtr[number_of_generations()]; | |
| 65 if (_generations == NULL) | |
| 66 vm_exit_during_initialization("Unable to allocate gen spec"); | |
| 67 | |
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68 if (ParNewGeneration::in_use()) { |
| 0 | 69 if (UseAdaptiveSizePolicy) { |
| 70 _generations[0] = new GenerationSpec(Generation::ASParNew, | |
| 71 _initial_gen0_size, _max_gen0_size); | |
| 72 } else { | |
| 73 _generations[0] = new GenerationSpec(Generation::ParNew, | |
| 74 _initial_gen0_size, _max_gen0_size); | |
| 75 } | |
| 76 } else { | |
| 77 _generations[0] = new GenerationSpec(Generation::DefNew, | |
| 78 _initial_gen0_size, _max_gen0_size); | |
| 79 } | |
| 80 if (UseAdaptiveSizePolicy) { | |
| 81 _generations[1] = new GenerationSpec(Generation::ASConcurrentMarkSweep, | |
| 82 _initial_gen1_size, _max_gen1_size); | |
| 83 } else { | |
| 84 _generations[1] = new GenerationSpec(Generation::ConcurrentMarkSweep, | |
| 85 _initial_gen1_size, _max_gen1_size); | |
| 86 } | |
| 87 | |
| 88 if (_generations[0] == NULL || _generations[1] == NULL) { | |
| 89 vm_exit_during_initialization("Unable to allocate gen spec"); | |
| 90 } | |
| 91 } | |
| 92 | |
| 93 void ConcurrentMarkSweepPolicy::initialize_size_policy(size_t init_eden_size, | |
| 94 size_t init_promo_size, | |
| 95 size_t init_survivor_size) { | |
| 96 double max_gc_minor_pause_sec = ((double) MaxGCMinorPauseMillis)/1000.0; | |
| 97 double max_gc_pause_sec = ((double) MaxGCPauseMillis)/1000.0; | |
| 98 _size_policy = new CMSAdaptiveSizePolicy(init_eden_size, | |
| 99 init_promo_size, | |
| 100 init_survivor_size, | |
| 101 max_gc_minor_pause_sec, | |
| 102 max_gc_pause_sec, | |
| 103 GCTimeRatio); | |
| 104 } | |
| 105 | |
| 106 void ConcurrentMarkSweepPolicy::initialize_gc_policy_counters() { | |
| 107 // initialize the policy counters - 2 collectors, 3 generations | |
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108 if (ParNewGeneration::in_use()) { |
| 0 | 109 _gc_policy_counters = new GCPolicyCounters("ParNew:CMS", 2, 3); |
| 110 } | |
| 111 else { | |
| 112 _gc_policy_counters = new GCPolicyCounters("Copy:CMS", 2, 3); | |
| 113 } | |
| 114 } | |
| 115 | |
| 116 // Returns true if the incremental mode is enabled. | |
| 117 bool ConcurrentMarkSweepPolicy::has_soft_ended_eden() | |
| 118 { | |
| 119 return CMSIncrementalMode; | |
| 120 } | |
| 121 | |
| 122 | |
| 123 // | |
| 124 // ASConcurrentMarkSweepPolicy methods | |
| 125 // | |
| 126 | |
| 127 void ASConcurrentMarkSweepPolicy::initialize_gc_policy_counters() { | |
| 128 | |
| 129 assert(size_policy() != NULL, "A size policy is required"); | |
| 130 // initialize the policy counters - 2 collectors, 3 generations | |
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jmasa
parents:
1552
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131 if (ParNewGeneration::in_use()) { |
| 0 | 132 _gc_policy_counters = new CMSGCAdaptivePolicyCounters("ParNew:CMS", 2, 3, |
| 133 size_policy()); | |
| 134 } | |
| 135 else { | |
| 136 _gc_policy_counters = new CMSGCAdaptivePolicyCounters("Copy:CMS", 2, 3, | |
| 137 size_policy()); | |
| 138 } | |
| 139 } |