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annotate src/share/vm/memory/metaspaceCounters.cpp @ 6725:da91efe96a93

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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>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
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children 5d2156bcb78b
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1 /*
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2 * Copyright (c) 2012 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 "precompiled.hpp"
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26 #include "memory/metaspaceCounters.hpp"
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27 #include "memory/resourceArea.hpp"
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28
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29 #define METASPACE_NAME "perm"
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30
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31 MetaspaceCounters* MetaspaceCounters::_metaspace_counters = NULL;
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32
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33 MetaspaceCounters::MetaspaceCounters() {
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34 if (UsePerfData) {
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35 size_t min_capacity = MetaspaceAux::min_chunk_size();
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36 size_t max_capacity = MetaspaceAux::reserved_in_bytes();
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37 size_t curr_capacity = MetaspaceAux::capacity_in_bytes();
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38 size_t used = MetaspaceAux::used_in_bytes();
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39
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40 initialize(min_capacity, max_capacity, curr_capacity, used);
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41 }
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42 }
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43
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44 void MetaspaceCounters::initialize(size_t min_capacity,
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45 size_t max_capacity,
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46 size_t curr_capacity,
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47 size_t used) {
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48
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49 if (UsePerfData) {
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50 EXCEPTION_MARK;
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51 ResourceMark rm;
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52
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53 // Create a name that will be recognized by jstat tools as
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54 // the perm gen. Change this to a Metaspace name when the
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55 // tools are fixed.
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56 // name to recognize "sun.gc.generation.2.*"
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57
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58 const char* name = METASPACE_NAME;
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59 const int ordinal = 2;
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60 const int spaces = 1;
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61
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62 const char* cns = PerfDataManager::name_space("generation", ordinal);
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63
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64 _name_space = NEW_C_HEAP_ARRAY(char, strlen(cns)+1, mtClass);
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65 strcpy(_name_space, cns);
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66
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67 const char* cname = PerfDataManager::counter_name(_name_space, "name");
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68 PerfDataManager::create_string_constant(SUN_GC, cname, name, CHECK);
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69
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70 // End of perm gen like name creation
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71
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72 cname = PerfDataManager::counter_name(_name_space, "spaces");
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73 PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_None,
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74 spaces, CHECK);
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75
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76 cname = PerfDataManager::counter_name(_name_space, "minCapacity");
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77 PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_Bytes,
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78 min_capacity, CHECK);
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79
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80 cname = PerfDataManager::counter_name(_name_space, "maxCapacity");
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81 PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_Bytes,
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82 max_capacity, CHECK);
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83
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84 cname = PerfDataManager::counter_name(_name_space, "capacity");
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85 _current_size =
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86 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes,
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87 curr_capacity, CHECK);
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88
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89 // SpaceCounter like counters
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90 // name to recognize "sun.gc.generation.2.space.0.*"
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91 {
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92 const int space_ordinal = 0;
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93 const char* cns = PerfDataManager::name_space(_name_space, "space",
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94 space_ordinal);
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95
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96 char* space_name_space = NEW_C_HEAP_ARRAY(char, strlen(cns)+1, mtClass);
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97 strcpy(space_name_space, cns);
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98
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99 const char* cname = PerfDataManager::counter_name(space_name_space, "name");
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100 PerfDataManager::create_string_constant(SUN_GC, cname, name, CHECK);
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101
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102 cname = PerfDataManager::counter_name(space_name_space, "maxCapacity");
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103 _max_capacity = PerfDataManager::create_variable(SUN_GC, cname,
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104 PerfData::U_Bytes,
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105 (jlong)max_capacity, CHECK);
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106
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107 cname = PerfDataManager::counter_name(space_name_space, "capacity");
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108 _capacity = PerfDataManager::create_variable(SUN_GC, cname,
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109 PerfData::U_Bytes,
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110 curr_capacity, CHECK);
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111
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112 cname = PerfDataManager::counter_name(space_name_space, "used");
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113 _used = PerfDataManager::create_variable(SUN_GC,
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114 cname,
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115 PerfData::U_Bytes,
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116 used,
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117 CHECK);
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118
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119 cname = PerfDataManager::counter_name(space_name_space, "initCapacity");
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120 PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_Bytes,
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121 min_capacity, CHECK);
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122 }
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123 }
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124 }
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125
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126 void MetaspaceCounters::update_capacity() {
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127 assert(UsePerfData, "Should not be called unless being used");
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128 size_t capacity_in_bytes = MetaspaceAux::capacity_in_bytes();
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129 _capacity->set_value(capacity_in_bytes);
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130 }
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131
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132 void MetaspaceCounters::update_used() {
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133 assert(UsePerfData, "Should not be called unless being used");
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134 size_t used_in_bytes = MetaspaceAux::used_in_bytes();
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135 _used->set_value(used_in_bytes);
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136 }
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137
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138 void MetaspaceCounters::update_max_capacity() {
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139 assert(UsePerfData, "Should not be called unless being used");
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140 size_t reserved_in_bytes = MetaspaceAux::reserved_in_bytes();
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141 _max_capacity->set_value(reserved_in_bytes);
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142 }
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143
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144 void MetaspaceCounters::update_all() {
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145 if (UsePerfData) {
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146 update_used();
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147 update_capacity();
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148 update_max_capacity();
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149 _current_size->set_value(MetaspaceAux::reserved_in_bytes());
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150 }
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151 }
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152
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153 void MetaspaceCounters::initialize_performance_counters() {
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154 if (UsePerfData) {
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155 _metaspace_counters = new MetaspaceCounters();
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156 }
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157 }
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158
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159 void MetaspaceCounters::update_performance_counters() {
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160 if (UsePerfData) {
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161 _metaspace_counters->update_all();
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162 }
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163 }
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164