Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp @ 2149:7e37af9d69ef
7011379: G1: overly long concurrent marking cycles
Summary: This changeset introduces filtering of SATB buffers at the point when they are about to be enqueued. If this filtering clears enough entries on each buffer, the buffer can then be re-used and not enqueued. This cuts down the number of SATB buffers that need to be processed by the concurrent marking threads.
Reviewed-by: johnc, ysr
| author | tonyp |
|---|---|
| date | Wed, 19 Jan 2011 09:35:17 -0500 |
| parents | f95d63e2154a |
| children | da91efe96a93 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2001, 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_GENERATIONSIZER_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP | |
| 27 | |
| 28 #include "memory/collectorPolicy.hpp" | |
| 29 | |
| 0 | 30 // There is a nice batch of tested generation sizing code in |
| 31 // TwoGenerationCollectorPolicy. Lets reuse it! | |
| 32 | |
| 33 class GenerationSizer : public TwoGenerationCollectorPolicy { | |
| 34 public: | |
| 35 GenerationSizer() { | |
| 36 // Partial init only! | |
| 37 initialize_flags(); | |
| 38 initialize_size_info(); | |
| 39 } | |
| 40 | |
| 41 void initialize_flags() { | |
| 42 // Do basic sizing work | |
| 43 this->TwoGenerationCollectorPolicy::initialize_flags(); | |
| 44 | |
| 45 // If the user hasn't explicitly set the number of worker | |
| 46 // threads, set the count. | |
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10
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47 assert(UseSerialGC || |
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48 !FLAG_IS_DEFAULT(ParallelGCThreads) || |
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49 (ParallelGCThreads > 0), |
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50 "ParallelGCThreads should be set before flag initialization"); |
| 0 | 51 |
| 52 // The survivor ratio's are calculated "raw", unlike the | |
| 53 // default gc, which adds 2 to the ratio value. We need to | |
| 54 // make sure the values are valid before using them. | |
| 55 if (MinSurvivorRatio < 3) { | |
| 56 MinSurvivorRatio = 3; | |
| 57 } | |
| 58 | |
| 59 if (InitialSurvivorRatio < 3) { | |
| 60 InitialSurvivorRatio = 3; | |
| 61 } | |
| 62 } | |
| 63 | |
| 64 size_t min_young_gen_size() { return _min_gen0_size; } | |
| 65 size_t young_gen_size() { return _initial_gen0_size; } | |
| 66 size_t max_young_gen_size() { return _max_gen0_size; } | |
| 67 | |
| 68 size_t min_old_gen_size() { return _min_gen1_size; } | |
| 69 size_t old_gen_size() { return _initial_gen1_size; } | |
| 70 size_t max_old_gen_size() { return _max_gen1_size; } | |
| 71 | |
| 72 size_t perm_gen_size() { return PermSize; } | |
| 73 size_t max_perm_gen_size() { return MaxPermSize; } | |
| 74 }; | |
| 1972 | 75 |
| 76 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP |