psMemoryPool.cpp revision 3602:da91efe96a93 
1/*
2 * Copyright (c) 2007, 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
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23 */
24
25#include "precompiled.hpp"
26#include "classfile/systemDictionary.hpp"
27#include "classfile/vmSymbols.hpp"
28#include "oops/oop.inline.hpp"
29#include "runtime/handles.inline.hpp"
30#include "runtime/javaCalls.hpp"
31#include "services/lowMemoryDetector.hpp"
32#include "services/management.hpp"
33#include "services/memoryManager.hpp"
34#include "services/psMemoryPool.hpp"
35
36PSGenerationPool::PSGenerationPool(PSOldGen* gen,
37                                   const char* name,
38                                   PoolType type,
39                                   bool support_usage_threshold) :
40  CollectedMemoryPool(name, type, gen->capacity_in_bytes(),
41                      gen->reserved().byte_size(), support_usage_threshold), _gen(gen) {
42}
43
44MemoryUsage PSGenerationPool::get_memory_usage() {
45  size_t maxSize   = (available_for_allocation() ? max_size() : 0);
46  size_t used      = used_in_bytes();
47  size_t committed = _gen->capacity_in_bytes();
48
49  return MemoryUsage(initial_size(), used, committed, maxSize);
50}
51
52// The max size of EdenMutableSpacePool =
53//     max size of the PSYoungGen - capacity of two survivor spaces
54//
55// Max size of PS eden space is changing due to ergonomic.
56// PSYoungGen, PSOldGen, Eden, Survivor spaces are all resizable.
57//
58EdenMutableSpacePool::EdenMutableSpacePool(PSYoungGen* gen,
59                                           MutableSpace* space,
60                                           const char* name,
61                                           PoolType type,
62                                           bool support_usage_threshold) :
63  CollectedMemoryPool(name, type, space->capacity_in_bytes(),
64                      (gen->max_size() - gen->from_space()->capacity_in_bytes() - gen->to_space()->capacity_in_bytes()),
65                       support_usage_threshold),
66  _gen(gen), _space(space) {
67}
68
69MemoryUsage EdenMutableSpacePool::get_memory_usage() {
70  size_t maxSize   = (available_for_allocation() ? max_size() : 0);
71  size_t used = used_in_bytes();
72  size_t committed = _space->capacity_in_bytes();
73
74  return MemoryUsage(initial_size(), used, committed, maxSize);
75}
76
77// The max size of SurvivorMutableSpacePool =
78//     current capacity of the from-space
79//
80// PS from and to survivor spaces could have different sizes.
81//
82SurvivorMutableSpacePool::SurvivorMutableSpacePool(PSYoungGen* gen,
83                                                   const char* name,
84                                                   PoolType type,
85                                                   bool support_usage_threshold) :
86  CollectedMemoryPool(name, type, gen->from_space()->capacity_in_bytes(),
87                      gen->from_space()->capacity_in_bytes(),
88                      support_usage_threshold), _gen(gen) {
89}
90
91MemoryUsage SurvivorMutableSpacePool::get_memory_usage() {
92  size_t maxSize = (available_for_allocation() ? max_size() : 0);
93  size_t used    = used_in_bytes();
94  size_t committed = committed_in_bytes();
95  return MemoryUsage(initial_size(), used, committed, maxSize);
96}
97