1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,69 @@
1.4 +/*
1.5 + * Copyright 2001-2006 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +// There is a nice batch of tested generation sizing code in
1.29 +// TwoGenerationCollectorPolicy. Lets reuse it!
1.30 +
1.31 +class GenerationSizer : public TwoGenerationCollectorPolicy {
1.32 + public:
1.33 + GenerationSizer() {
1.34 + // Partial init only!
1.35 + initialize_flags();
1.36 + initialize_size_info();
1.37 + }
1.38 +
1.39 + void initialize_flags() {
1.40 + // Do basic sizing work
1.41 + this->TwoGenerationCollectorPolicy::initialize_flags();
1.42 +
1.43 + // If the user hasn't explicitly set the number of worker
1.44 + // threads, set the count.
1.45 + if (ParallelGCThreads == 0) {
1.46 + assert(UseParallelGC, "Setting ParallelGCThreads without UseParallelGC");
1.47 + ParallelGCThreads = os::active_processor_count();
1.48 + }
1.49 +
1.50 + // The survivor ratio's are calculated "raw", unlike the
1.51 + // default gc, which adds 2 to the ratio value. We need to
1.52 + // make sure the values are valid before using them.
1.53 + if (MinSurvivorRatio < 3) {
1.54 + MinSurvivorRatio = 3;
1.55 + }
1.56 +
1.57 + if (InitialSurvivorRatio < 3) {
1.58 + InitialSurvivorRatio = 3;
1.59 + }
1.60 + }
1.61 +
1.62 + size_t min_young_gen_size() { return _min_gen0_size; }
1.63 + size_t young_gen_size() { return _initial_gen0_size; }
1.64 + size_t max_young_gen_size() { return _max_gen0_size; }
1.65 +
1.66 + size_t min_old_gen_size() { return _min_gen1_size; }
1.67 + size_t old_gen_size() { return _initial_gen1_size; }
1.68 + size_t max_old_gen_size() { return _max_gen1_size; }
1.69 +
1.70 + size_t perm_gen_size() { return PermSize; }
1.71 + size_t max_perm_gen_size() { return MaxPermSize; }
1.72 +};
