Mercurial > hg > truffle
view src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp @ 5251:467de393651a
optimization: frame prologue & epilogue ommitted for methods with no spills, no callee-saved registers, no incoming stack args and no debug info
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 18 Apr 2012 23:39:07 +0200 |
parents | f95d63e2154a |
children | da91efe96a93 |
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/* * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP #include "memory/collectorPolicy.hpp" // There is a nice batch of tested generation sizing code in // TwoGenerationCollectorPolicy. Lets reuse it! class GenerationSizer : public TwoGenerationCollectorPolicy { public: GenerationSizer() { // Partial init only! initialize_flags(); initialize_size_info(); } void initialize_flags() { // Do basic sizing work this->TwoGenerationCollectorPolicy::initialize_flags(); // If the user hasn't explicitly set the number of worker // threads, set the count. assert(UseSerialGC || !FLAG_IS_DEFAULT(ParallelGCThreads) || (ParallelGCThreads > 0), "ParallelGCThreads should be set before flag initialization"); // The survivor ratio's are calculated "raw", unlike the // default gc, which adds 2 to the ratio value. We need to // make sure the values are valid before using them. if (MinSurvivorRatio < 3) { MinSurvivorRatio = 3; } if (InitialSurvivorRatio < 3) { InitialSurvivorRatio = 3; } } size_t min_young_gen_size() { return _min_gen0_size; } size_t young_gen_size() { return _initial_gen0_size; } size_t max_young_gen_size() { return _max_gen0_size; } size_t min_old_gen_size() { return _min_gen1_size; } size_t old_gen_size() { return _initial_gen1_size; } size_t max_old_gen_size() { return _max_gen1_size; } size_t perm_gen_size() { return PermSize; } size_t max_perm_gen_size() { return MaxPermSize; } }; #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP