Mercurial > hg > truffle
view src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp @ 615:c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
Summary: Call newly created CollectedHeap::dump_{pre,post}_full_gc before and after every stop-world full collection cycle on GenCollectedHeap and ParallelScavengeHeap. (Support for G1CollectedHeap forthcoming under CR 6810861.) Small modifications to existing heap dumping and class histogram implementation, especially to allow multiple on-the-fly histos/dumps by the VM thread during a single safepoint.
Reviewed-by: jmasa, alanb, mchung
author | ysr |
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date | Mon, 02 Mar 2009 16:37:04 -0800 |
parents | d1605aabd0a1 |
children | c18cbe5936b8 |
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/* * Copyright 2001-2008 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ // 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; } };