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annotate src/share/vm/memory/metaspaceCounters.cpp @ 12235:d6c266999345

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8023476: Metaspace capacity > reserved Reviewed-by: stefank, hseigel, mgerdin
author ehelin
date Thu, 12 Sep 2013 10:15:30 +0200
parents 7944aba7ba41
children 73d0d0218068
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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 #include "runtime/globals.hpp"
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29 #include "runtime/perfData.hpp"
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30 #include "utilities/exceptions.hpp"
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31
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32 class MetaspacePerfCounters: public CHeapObj<mtInternal> {
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33 friend class VMStructs;
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34 PerfVariable* _capacity;
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35 PerfVariable* _used;
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36 PerfVariable* _max_capacity;
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37
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38 PerfVariable* create_variable(const char *ns, const char *name, size_t value, TRAPS) {
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39 const char *path = PerfDataManager::counter_name(ns, name);
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40 return PerfDataManager::create_variable(SUN_GC, path, PerfData::U_Bytes, value, THREAD);
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41 }
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42
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43 void create_constant(const char *ns, const char *name, size_t value, TRAPS) {
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44 const char *path = PerfDataManager::counter_name(ns, name);
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45 PerfDataManager::create_constant(SUN_GC, path, PerfData::U_Bytes, value, THREAD);
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46 }
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47
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48 public:
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49 MetaspacePerfCounters(const char* ns, size_t min_capacity, size_t curr_capacity, size_t max_capacity, size_t used) {
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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_constant(ns, "minCapacity", min_capacity, THREAD);
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54 _capacity = create_variable(ns, "capacity", curr_capacity, THREAD);
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55 _max_capacity = create_variable(ns, "maxCapacity", max_capacity, THREAD);
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56 _used = create_variable(ns, "used", used, THREAD);
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57 }
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58
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59 void update(size_t capacity, size_t max_capacity, size_t used) {
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60 _capacity->set_value(capacity);
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61 _max_capacity->set_value(max_capacity);
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62 _used->set_value(used);
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63 }
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64 };
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65
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66 MetaspacePerfCounters* MetaspaceCounters::_perf_counters = NULL;
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67
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68 size_t MetaspaceCounters::calculate_capacity() {
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69 // The total capacity is the sum of
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70 // 1) capacity of Metachunks in use by all Metaspaces
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71 // 2) unused space at the end of each Metachunk
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72 // 3) space in the freelist
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73 size_t total_capacity = MetaspaceAux::allocated_capacity_bytes()
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74 + MetaspaceAux::free_bytes() + MetaspaceAux::free_chunks_total_bytes();
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75 return total_capacity;
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76 }
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77
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78 void MetaspaceCounters::initialize_performance_counters() {
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79 if (UsePerfData) {
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80 assert(_perf_counters == NULL, "Should only be initialized once");
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81
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82 size_t min_capacity = MetaspaceAux::min_chunk_size_bytes();
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83 size_t capacity = calculate_capacity();
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84 size_t max_capacity = MetaspaceAux::reserved_bytes();
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85 size_t used = MetaspaceAux::allocated_used_bytes();
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86
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87 _perf_counters = new MetaspacePerfCounters("metaspace", min_capacity, capacity, max_capacity, used);
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88 }
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89 }
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90
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91 void MetaspaceCounters::update_performance_counters() {
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92 if (UsePerfData) {
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93 assert(_perf_counters != NULL, "Should be initialized");
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94
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95 size_t capacity = calculate_capacity();
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96 size_t max_capacity = MetaspaceAux::reserved_bytes();
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97 size_t used = MetaspaceAux::allocated_used_bytes();
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98
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99 _perf_counters->update(capacity, max_capacity, used);
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100 }
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101 }
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102
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103 MetaspacePerfCounters* CompressedClassSpaceCounters::_perf_counters = NULL;
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104
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105 size_t CompressedClassSpaceCounters::calculate_capacity() {
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106 return MetaspaceAux::allocated_capacity_bytes(_class_type) +
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107 MetaspaceAux::free_bytes(_class_type) +
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108 MetaspaceAux::free_chunks_total_bytes(_class_type);
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109 }
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110
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111 void CompressedClassSpaceCounters::update_performance_counters() {
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112 if (UsePerfData && UseCompressedClassPointers) {
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113 assert(_perf_counters != NULL, "Should be initialized");
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114
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115 size_t capacity = calculate_capacity();
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116 size_t max_capacity = MetaspaceAux::reserved_bytes(_class_type);
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117 size_t used = MetaspaceAux::allocated_used_bytes(_class_type);
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118
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119 _perf_counters->update(capacity, max_capacity, used);
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120 }
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121 }
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122
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123 void CompressedClassSpaceCounters::initialize_performance_counters() {
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124 if (UsePerfData) {
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125 assert(_perf_counters == NULL, "Should only be initialized once");
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126 const char* ns = "compressedclassspace";
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127
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128 if (UseCompressedClassPointers) {
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129 size_t min_capacity = MetaspaceAux::min_chunk_size_bytes();
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130 size_t capacity = calculate_capacity();
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131 size_t max_capacity = MetaspaceAux::reserved_bytes(_class_type);
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132 size_t used = MetaspaceAux::allocated_used_bytes(_class_type);
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133
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134 _perf_counters = new MetaspacePerfCounters(ns, min_capacity, capacity, max_capacity, used);
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135 } else {
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136 _perf_counters = new MetaspacePerfCounters(ns, 0, 0, 0, 0);
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137 }
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138 }
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139 }