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annotate src/share/vm/services/g1MemoryPool.cpp @ 1094:9118860519b6

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6904967: G1: some CollectionUsageThreshold tests fail Summary: ensure that max and committed are non-zero (currently: at least as large as the region size). Reviewed-by: iveresov, mchung
author tonyp
date Mon, 07 Dec 2009 14:22:34 -0500
parents afc30fccf324
children 1316cec51b4d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any 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 size_t max_size,
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32 bool support_usage_threshold) :
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33 _g1h(g1h), CollectedMemoryPool(name,
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34 MemoryPool::Heap,
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35 init_size,
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36 max_size,
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37 support_usage_threshold) {
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38 assert(UseG1GC, "sanity");
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39 }
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40
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41 // See the comment at the top of g1MemoryPool.hpp
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42 size_t G1MemoryPoolSuper::eden_space_committed(G1CollectedHeap* g1h) {
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43 return MAX2(eden_space_used(g1h), (size_t) HeapRegion::GrainBytes);
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44 }
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45
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46 // See the comment at the top of g1MemoryPool.hpp
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47 size_t G1MemoryPoolSuper::eden_space_used(G1CollectedHeap* g1h) {
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48 size_t young_list_length = g1h->young_list_length();
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49 size_t eden_used = young_list_length * HeapRegion::GrainBytes;
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50 size_t survivor_used = survivor_space_used(g1h);
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51 eden_used = subtract_up_to_zero(eden_used, survivor_used);
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52 return eden_used;
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53 }
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54
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55 // See the comment at the top of g1MemoryPool.hpp
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56 size_t G1MemoryPoolSuper::eden_space_max(G1CollectedHeap* g1h) {
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57 // This should ensure that it returns a value no smaller than the
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58 // region size. Currently, eden_space_committed() guarantees that.
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59 return eden_space_committed(g1h);
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60 }
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61
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62 // See the comment at the top of g1MemoryPool.hpp
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63 size_t G1MemoryPoolSuper::survivor_space_committed(G1CollectedHeap* g1h) {
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64 return MAX2(survivor_space_used(g1h), (size_t) HeapRegion::GrainBytes);
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65 }
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66
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67 // See the comment at the top of g1MemoryPool.hpp
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68 size_t G1MemoryPoolSuper::survivor_space_used(G1CollectedHeap* g1h) {
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69 size_t survivor_num = g1h->g1_policy()->recorded_survivor_regions();
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70 size_t survivor_used = survivor_num * HeapRegion::GrainBytes;
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71 return survivor_used;
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72 }
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73
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74 // See the comment at the top of g1MemoryPool.hpp
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75 size_t G1MemoryPoolSuper::survivor_space_max(G1CollectedHeap* g1h) {
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76 // This should ensure that it returns a value no smaller than the
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77 // region size. Currently, survivor_space_committed() guarantees that.
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78 return survivor_space_committed(g1h);
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79 }
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80
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81 // See the comment at the top of g1MemoryPool.hpp
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82 size_t G1MemoryPoolSuper::old_space_committed(G1CollectedHeap* g1h) {
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83 size_t committed = overall_committed(g1h);
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84 size_t eden_committed = eden_space_committed(g1h);
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85 size_t survivor_committed = survivor_space_committed(g1h);
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86 committed = subtract_up_to_zero(committed, eden_committed);
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87 committed = subtract_up_to_zero(committed, survivor_committed);
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88 committed = MAX2(committed, (size_t) HeapRegion::GrainBytes);
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89 return committed;
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90 }
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91
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92 // See the comment at the top of g1MemoryPool.hpp
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93 size_t G1MemoryPoolSuper::old_space_used(G1CollectedHeap* g1h) {
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94 size_t used = overall_used(g1h);
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95 size_t eden_used = eden_space_used(g1h);
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96 size_t survivor_used = survivor_space_used(g1h);
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97 used = subtract_up_to_zero(used, eden_used);
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98 used = subtract_up_to_zero(used, survivor_used);
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99 return used;
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100 }
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101
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102 // See the comment at the top of g1MemoryPool.hpp
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103 size_t G1MemoryPoolSuper::old_space_max(G1CollectedHeap* g1h) {
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104 size_t max = overall_max(g1h);
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105 size_t eden_max = eden_space_max(g1h);
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106 size_t survivor_max = survivor_space_max(g1h);
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107 max = subtract_up_to_zero(max, eden_max);
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108 max = subtract_up_to_zero(max, survivor_max);
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109 max = MAX2(max, (size_t) HeapRegion::GrainBytes);
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110 return max;
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111 }
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112
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113 G1EdenPool::G1EdenPool(G1CollectedHeap* g1h) :
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114 G1MemoryPoolSuper(g1h,
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115 "G1 Eden",
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116 eden_space_committed(g1h), /* init_size */
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117 eden_space_max(g1h), /* max_size */
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118 false /* support_usage_threshold */) {
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119 }
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120
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121 MemoryUsage G1EdenPool::get_memory_usage() {
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122 size_t initial_sz = initial_size();
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123 size_t max_sz = max_size();
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124 size_t used = used_in_bytes();
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125 size_t committed = eden_space_committed(_g1h);
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126
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127 return MemoryUsage(initial_sz, used, committed, max_sz);
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128 }
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129
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130 G1SurvivorPool::G1SurvivorPool(G1CollectedHeap* g1h) :
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131 G1MemoryPoolSuper(g1h,
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132 "G1 Survivor",
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133 survivor_space_committed(g1h), /* init_size */
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134 survivor_space_max(g1h), /* max_size */
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135 false /* support_usage_threshold */) {
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136 }
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137
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138 MemoryUsage G1SurvivorPool::get_memory_usage() {
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139 size_t initial_sz = initial_size();
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140 size_t max_sz = max_size();
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141 size_t used = used_in_bytes();
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142 size_t committed = survivor_space_committed(_g1h);
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143
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144 return MemoryUsage(initial_sz, used, committed, max_sz);
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145 }
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146
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147 G1OldGenPool::G1OldGenPool(G1CollectedHeap* g1h) :
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148 G1MemoryPoolSuper(g1h,
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149 "G1 Old Gen",
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150 old_space_committed(g1h), /* init_size */
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151 old_space_max(g1h), /* max_size */
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152 true /* support_usage_threshold */) {
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153 }
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154
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155 MemoryUsage G1OldGenPool::get_memory_usage() {
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156 size_t initial_sz = initial_size();
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157 size_t max_sz = max_size();
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158 size_t used = used_in_bytes();
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159 size_t committed = old_space_committed(_g1h);
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160
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161 return MemoryUsage(initial_sz, used, committed, max_sz);
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162 }