Mercurial > hg > graal-compiler
comparison src/share/vm/gc_implementation/parallelScavenge/generationSizer.cpp @ 13060:8f07aa079343
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
7057939: jmap shows MaxNewSize=4GB when Java is using parallel collector
Summary: Major cleanup of the collectorpolicy classes
Reviewed-by: tschatzl, jcoomes
author | jwilhelm |
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date | Fri, 01 Nov 2013 17:09:38 +0100 |
parents | |
children | ee527493b36d |
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13059:46d7652b223c | 13060:8f07aa079343 |
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1 /* | |
2 * Copyright (c) 2001, 2013, 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 */ | |
24 | |
25 #include "precompiled.hpp" | |
26 #include "gc_implementation/parallelScavenge/generationSizer.hpp" | |
27 #include "memory/collectorPolicy.hpp" | |
28 | |
29 void GenerationSizer::trace_gen_sizes(const char* const str) { | |
30 if (TracePageSizes) { | |
31 tty->print_cr("%s: " SIZE_FORMAT "," SIZE_FORMAT " " | |
32 SIZE_FORMAT "," SIZE_FORMAT " " | |
33 SIZE_FORMAT, | |
34 str, | |
35 _min_gen1_size / K, _max_gen1_size / K, | |
36 _min_gen0_size / K, _max_gen0_size / K, | |
37 _max_heap_byte_size / K); | |
38 } | |
39 } | |
40 | |
41 void GenerationSizer::initialize_alignments() { | |
42 _space_alignment = _gen_alignment = default_gen_alignment(); | |
43 _heap_alignment = compute_heap_alignment(); | |
44 } | |
45 | |
46 void GenerationSizer::initialize_flags() { | |
47 // Do basic sizing work | |
48 TwoGenerationCollectorPolicy::initialize_flags(); | |
49 | |
50 assert(UseSerialGC || | |
51 !FLAG_IS_DEFAULT(ParallelGCThreads) || | |
52 (ParallelGCThreads > 0), | |
53 "ParallelGCThreads should be set before flag initialization"); | |
54 | |
55 // The survivor ratio's are calculated "raw", unlike the | |
56 // default gc, which adds 2 to the ratio value. We need to | |
57 // make sure the values are valid before using them. | |
58 if (MinSurvivorRatio < 3) { | |
59 FLAG_SET_ERGO(uintx, MinSurvivorRatio, 3); | |
60 } | |
61 | |
62 if (InitialSurvivorRatio < 3) { | |
63 FLAG_SET_ERGO(uintx, InitialSurvivorRatio, 3); | |
64 } | |
65 } | |
66 | |
67 void GenerationSizer::initialize_size_info() { | |
68 trace_gen_sizes("ps heap raw"); | |
69 const size_t page_sz = os::page_size_for_region(_min_heap_byte_size, | |
70 _max_heap_byte_size, | |
71 8); | |
72 | |
73 // Can a page size be something else than a power of two? | |
74 assert(is_power_of_2((intptr_t)page_sz), "must be a power of 2"); | |
75 size_t new_alignment = round_to(page_sz, _gen_alignment); | |
76 if (new_alignment != _gen_alignment) { | |
77 _gen_alignment = new_alignment; | |
78 // Redo everything from the start | |
79 initialize_flags(); | |
80 } | |
81 TwoGenerationCollectorPolicy::initialize_size_info(); | |
82 | |
83 trace_gen_sizes("ps heap rnd"); | |
84 } |