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src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp@da91efe96a93
src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp
Sat, 01 Sep 2012 13:25:18 -0400
- author
- coleenp
- date
- Sat, 01 Sep 2012 13:25:18 -0400
- changeset 4037
- da91efe96a93
- parent 2314
- f95d63e2154a
- child 5706
- 9e11762cee52
- permissions
- -rw-r--r--
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
1 /*
2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP
28 #include "memory/collectorPolicy.hpp"
30 // There is a nice batch of tested generation sizing code in
31 // TwoGenerationCollectorPolicy. Lets reuse it!
33 class GenerationSizer : public TwoGenerationCollectorPolicy {
34 public:
35 GenerationSizer() {
36 // Partial init only!
37 initialize_flags();
38 initialize_size_info();
39 }
41 void initialize_flags() {
42 // Do basic sizing work
43 this->TwoGenerationCollectorPolicy::initialize_flags();
45 // If the user hasn't explicitly set the number of worker
46 // threads, set the count.
47 assert(UseSerialGC ||
48 !FLAG_IS_DEFAULT(ParallelGCThreads) ||
49 (ParallelGCThreads > 0),
50 "ParallelGCThreads should be set before flag initialization");
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 }
59 if (InitialSurvivorRatio < 3) {
60 InitialSurvivorRatio = 3;
61 }
62 }
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; }
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; }
72 size_t metaspace_size() { return MetaspaceSize; }
73 size_t max_metaspace_size() { return MaxMetaspaceSize; }
74 };
76 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP
