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annotate src/share/vm/memory/metaspaceCounters.cpp @ 10183:868d87ed63c8

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8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions Reviewed-by: mgerdin, coleenp
author jmasa
date Tue, 12 Feb 2013 14:15:45 -0800
parents 0624b9d81255
children 1a8fb39bdbc4
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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 "utilities/exceptions.hpp"
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29
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30 MetaspaceCounters* MetaspaceCounters::_metaspace_counters = NULL;
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31
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32 size_t MetaspaceCounters::calc_total_capacity() {
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33 // The total capacity is the sum of
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34 // 1) capacity of Metachunks in use by all Metaspaces
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35 // 2) unused space at the end of each Metachunk
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36 // 3) space in the freelist
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37 size_t total_capacity = MetaspaceAux::allocated_capacity_bytes()
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38 + MetaspaceAux::free_bytes() + MetaspaceAux::free_chunks_total_in_bytes();
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39 return total_capacity;
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40 }
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41
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42 MetaspaceCounters::MetaspaceCounters() :
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43 _capacity(NULL),
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44 _used(NULL),
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45 _max_capacity(NULL) {
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46 if (UsePerfData) {
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47 size_t min_capacity = MetaspaceAux::min_chunk_size();
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48 size_t max_capacity = MetaspaceAux::reserved_in_bytes();
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49 size_t curr_capacity = calc_total_capacity();
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50 size_t used = MetaspaceAux::allocated_used_bytes();
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51
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52 initialize(min_capacity, max_capacity, curr_capacity, used);
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53 }
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54 }
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55
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56 static PerfVariable* create_ms_variable(const char *ns,
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57 const char *name,
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58 size_t value,
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59 TRAPS) {
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60 const char *path = PerfDataManager::counter_name(ns, name);
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61 PerfVariable *result =
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62 PerfDataManager::create_variable(SUN_GC, path, PerfData::U_Bytes, value,
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63 CHECK_NULL);
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64 return result;
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65 }
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66
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67 static void create_ms_constant(const char *ns,
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68 const char *name,
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69 size_t value,
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70 TRAPS) {
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71 const char *path = PerfDataManager::counter_name(ns, name);
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72 PerfDataManager::create_constant(SUN_GC, path, PerfData::U_Bytes, value, CHECK);
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73 }
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74
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75 void MetaspaceCounters::initialize(size_t min_capacity,
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76 size_t max_capacity,
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77 size_t curr_capacity,
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78 size_t used) {
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79
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80 if (UsePerfData) {
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81 EXCEPTION_MARK;
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82 ResourceMark rm;
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83
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84 const char *ms = "metaspace";
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85
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86 create_ms_constant(ms, "minCapacity", min_capacity, CHECK);
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87 _max_capacity = create_ms_variable(ms, "maxCapacity", max_capacity, CHECK);
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88 _capacity = create_ms_variable(ms, "capacity", curr_capacity, CHECK);
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89 _used = create_ms_variable(ms, "used", used, CHECK);
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90 }
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91 }
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92
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93 void MetaspaceCounters::update_capacity() {
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94 assert(UsePerfData, "Should not be called unless being used");
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95 size_t total_capacity = calc_total_capacity();
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96 _capacity->set_value(total_capacity);
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97 }
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98
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99 void MetaspaceCounters::update_used() {
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100 assert(UsePerfData, "Should not be called unless being used");
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101 size_t used_in_bytes = MetaspaceAux::allocated_used_bytes();
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102 _used->set_value(used_in_bytes);
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103 }
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104
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105 void MetaspaceCounters::update_max_capacity() {
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106 assert(UsePerfData, "Should not be called unless being used");
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107 assert(_max_capacity != NULL, "Should be initialized");
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108 size_t reserved_in_bytes = MetaspaceAux::reserved_in_bytes();
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109 _max_capacity->set_value(reserved_in_bytes);
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110 }
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111
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112 void MetaspaceCounters::update_all() {
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113 if (UsePerfData) {
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114 update_used();
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115 update_capacity();
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116 update_max_capacity();
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117 }
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118 }
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119
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120 void MetaspaceCounters::initialize_performance_counters() {
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121 if (UsePerfData) {
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122 assert(_metaspace_counters == NULL, "Should only be initialized once");
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123 _metaspace_counters = new MetaspaceCounters();
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124 }
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125 }
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126
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127 void MetaspaceCounters::update_performance_counters() {
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128 if (UsePerfData) {
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129 assert(_metaspace_counters != NULL, "Should be initialized");
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130 _metaspace_counters->update_all();
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131 }
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132 }
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133