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/*
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* Copyright 2001-2006 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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// There is a nice batch of tested generation sizing code in
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// TwoGenerationCollectorPolicy. Lets reuse it!
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class GenerationSizer : public TwoGenerationCollectorPolicy {
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public:
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GenerationSizer() {
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// Partial init only!
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initialize_flags();
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initialize_size_info();
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}
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void initialize_flags() {
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// Do basic sizing work
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this->TwoGenerationCollectorPolicy::initialize_flags();
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// If the user hasn't explicitly set the number of worker
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// threads, set the count.
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if (ParallelGCThreads == 0) {
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assert(UseParallelGC, "Setting ParallelGCThreads without UseParallelGC");
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ParallelGCThreads = os::active_processor_count();
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}
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// The survivor ratio's are calculated "raw", unlike the
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// default gc, which adds 2 to the ratio value. We need to
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// make sure the values are valid before using them.
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if (MinSurvivorRatio < 3) {
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MinSurvivorRatio = 3;
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}
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if (InitialSurvivorRatio < 3) {
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InitialSurvivorRatio = 3;
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}
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}
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size_t min_young_gen_size() { return _min_gen0_size; }
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size_t young_gen_size() { return _initial_gen0_size; }
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size_t max_young_gen_size() { return _max_gen0_size; }
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size_t min_old_gen_size() { return _min_gen1_size; }
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size_t old_gen_size() { return _initial_gen1_size; }
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size_t max_old_gen_size() { return _max_gen1_size; }
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size_t perm_gen_size() { return PermSize; }
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size_t max_perm_gen_size() { return MaxPermSize; }
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};
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