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annotate src/share/vm/services/g1MemoryPool.cpp @ 1754:e967bad2a9ab

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6941275: G1: The MemoryPools are incorrectly supported for G1 Summary: The way we were caluclating the max value meant that it might fluctuate during the run and this broke some assumptions inside the MBeans framework. This change sets the max value of each pool to -1, which means undefined according to the spec. Reviewed-by: mchung, johnc
author tonyp
date Wed, 25 Aug 2010 08:44:58 -0400
parents c18cbe5936b8
children f95d63e2154a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 # include "incls/_precompiled.incl"
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26 # include "incls/_g1MemoryPool.cpp.incl"
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27
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28 G1MemoryPoolSuper::G1MemoryPoolSuper(G1CollectedHeap* g1h,
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29 const char* name,
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30 size_t init_size,
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31 bool support_usage_threshold) :
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32 _g1h(g1h), CollectedMemoryPool(name,
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33 MemoryPool::Heap,
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34 init_size,
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35 undefined_max(),
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36 support_usage_threshold) {
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37 assert(UseG1GC, "sanity");
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38 }
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39
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40 // See the comment at the top of g1MemoryPool.hpp
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41 size_t G1MemoryPoolSuper::eden_space_committed(G1CollectedHeap* g1h) {
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42 return MAX2(eden_space_used(g1h), (size_t) HeapRegion::GrainBytes);
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43 }
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44
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45 // See the comment at the top of g1MemoryPool.hpp
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46 size_t G1MemoryPoolSuper::eden_space_used(G1CollectedHeap* g1h) {
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47 size_t young_list_length = g1h->young_list()->length();
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48 size_t eden_used = young_list_length * HeapRegion::GrainBytes;
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49 size_t survivor_used = survivor_space_used(g1h);
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50 eden_used = subtract_up_to_zero(eden_used, survivor_used);
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51 return eden_used;
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52 }
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53
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54 // See the comment at the top of g1MemoryPool.hpp
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55 size_t G1MemoryPoolSuper::survivor_space_committed(G1CollectedHeap* g1h) {
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56 return MAX2(survivor_space_used(g1h), (size_t) HeapRegion::GrainBytes);
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57 }
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58
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59 // See the comment at the top of g1MemoryPool.hpp
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60 size_t G1MemoryPoolSuper::survivor_space_used(G1CollectedHeap* g1h) {
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61 size_t survivor_num = g1h->g1_policy()->recorded_survivor_regions();
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62 size_t survivor_used = survivor_num * HeapRegion::GrainBytes;
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63 return survivor_used;
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64 }
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65
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66 // See the comment at the top of g1MemoryPool.hpp
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67 size_t G1MemoryPoolSuper::old_space_committed(G1CollectedHeap* g1h) {
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68 size_t committed = overall_committed(g1h);
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69 size_t eden_committed = eden_space_committed(g1h);
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70 size_t survivor_committed = survivor_space_committed(g1h);
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71 committed = subtract_up_to_zero(committed, eden_committed);
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72 committed = subtract_up_to_zero(committed, survivor_committed);
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73 committed = MAX2(committed, (size_t) HeapRegion::GrainBytes);
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74 return committed;
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75 }
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76
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77 // See the comment at the top of g1MemoryPool.hpp
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78 size_t G1MemoryPoolSuper::old_space_used(G1CollectedHeap* g1h) {
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79 size_t used = overall_used(g1h);
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80 size_t eden_used = eden_space_used(g1h);
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81 size_t survivor_used = survivor_space_used(g1h);
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82 used = subtract_up_to_zero(used, eden_used);
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83 used = subtract_up_to_zero(used, survivor_used);
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84 return used;
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85 }
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86
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87 G1EdenPool::G1EdenPool(G1CollectedHeap* g1h) :
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88 G1MemoryPoolSuper(g1h,
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89 "G1 Eden",
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90 eden_space_committed(g1h), /* init_size */
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91 false /* support_usage_threshold */) { }
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92
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93 MemoryUsage G1EdenPool::get_memory_usage() {
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94 size_t initial_sz = initial_size();
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95 size_t max_sz = max_size();
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96 size_t used = used_in_bytes();
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97 size_t committed = eden_space_committed(_g1h);
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98
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99 return MemoryUsage(initial_sz, used, committed, max_sz);
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100 }
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101
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102 G1SurvivorPool::G1SurvivorPool(G1CollectedHeap* g1h) :
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103 G1MemoryPoolSuper(g1h,
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104 "G1 Survivor",
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105 survivor_space_committed(g1h), /* init_size */
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106 false /* support_usage_threshold */) { }
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107
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108 MemoryUsage G1SurvivorPool::get_memory_usage() {
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109 size_t initial_sz = initial_size();
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110 size_t max_sz = max_size();
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111 size_t used = used_in_bytes();
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112 size_t committed = survivor_space_committed(_g1h);
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113
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114 return MemoryUsage(initial_sz, used, committed, max_sz);
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115 }
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116
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117 G1OldGenPool::G1OldGenPool(G1CollectedHeap* g1h) :
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118 G1MemoryPoolSuper(g1h,
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119 "G1 Old Gen",
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120 old_space_committed(g1h), /* init_size */
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121 true /* support_usage_threshold */) { }
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122
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123 MemoryUsage G1OldGenPool::get_memory_usage() {
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124 size_t initial_sz = initial_size();
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125 size_t max_sz = max_size();
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126 size_t used = used_in_bytes();
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127 size_t committed = old_space_committed(_g1h);
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128
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129 return MemoryUsage(initial_sz, used, committed, max_sz);
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130 }