1 /* 2 * Copyright (c) 2012, 2020, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "memory/metaspaceCounters.hpp" 27 #include "memory/resourceArea.hpp" 28 #include "runtime/globals.hpp" 29 #include "runtime/perfData.hpp" 30 #include "utilities/exceptions.hpp" 31 32 class MetaspacePerfCounters: public CHeapObj<mtMetaspace> { 33 friend class VMStructs; 34 PerfVariable* _capacity; 35 PerfVariable* _used; 36 PerfVariable* _max_capacity; 37 38 PerfVariable* create_variable(const char *ns, const char *name, size_t value, TRAPS) { 39 const char *path = PerfDataManager::counter_name(ns, name); 40 return PerfDataManager::create_variable(SUN_GC, path, PerfData::U_Bytes, value, THREAD); 41 } 42 43 void create_constant(const char *ns, const char *name, size_t value, TRAPS) { 44 const char *path = PerfDataManager::counter_name(ns, name); 45 PerfDataManager::create_constant(SUN_GC, path, PerfData::U_Bytes, value, THREAD); 46 } 47 48 public: 49 MetaspacePerfCounters(const char* ns, size_t min_capacity, size_t curr_capacity, size_t max_capacity, size_t used) { 50 EXCEPTION_MARK; 51 ResourceMark rm; 52 53 create_constant(ns, "minCapacity", min_capacity, THREAD); 54 _capacity = create_variable(ns, "capacity", curr_capacity, THREAD); 55 _max_capacity = create_variable(ns, "maxCapacity", max_capacity, THREAD); 56 _used = create_variable(ns, "used", used, THREAD); 57 } 58 59 void update(size_t capacity, size_t max_capacity, size_t used) { 60 _capacity->set_value(capacity); 61 _max_capacity->set_value(max_capacity); 62 _used->set_value(used); 63 } 64 }; 65 66 MetaspacePerfCounters* MetaspaceCounters::_perf_counters = NULL; 67 68 size_t MetaspaceCounters::used() { 69 return MetaspaceUtils::used_bytes(); 70 } 71 72 size_t MetaspaceCounters::capacity() { 73 return MetaspaceUtils::committed_bytes(); 74 } 75 76 size_t MetaspaceCounters::max_capacity() { 77 return MetaspaceUtils::reserved_bytes(); 78 } 79 80 void MetaspaceCounters::initialize_performance_counters() { 81 if (UsePerfData) { 82 assert(_perf_counters == NULL, "Should only be initialized once"); 83 84 size_t min_capacity = 0; 85 _perf_counters = new MetaspacePerfCounters("metaspace", min_capacity, 86 capacity(), max_capacity(), used()); 87 } 88 } 89 90 void MetaspaceCounters::update_performance_counters() { 91 if (UsePerfData) { 92 assert(_perf_counters != NULL, "Should be initialized"); 93 94 _perf_counters->update(capacity(), max_capacity(), used()); 95 } 96 } 97 98 MetaspacePerfCounters* CompressedClassSpaceCounters::_perf_counters = NULL; 99 100 size_t CompressedClassSpaceCounters::used() { 101 return MetaspaceUtils::used_bytes(Metaspace::ClassType); 102 } 103 104 size_t CompressedClassSpaceCounters::capacity() { 105 return MetaspaceUtils::committed_bytes(Metaspace::ClassType); 106 } 107 108 size_t CompressedClassSpaceCounters::max_capacity() { 109 return MetaspaceUtils::reserved_bytes(Metaspace::ClassType); 110 } 111 112 void CompressedClassSpaceCounters::update_performance_counters() { 113 if (UsePerfData && UseCompressedClassPointers) { 114 assert(_perf_counters != NULL, "Should be initialized"); 115 116 _perf_counters->update(capacity(), max_capacity(), used()); 117 } 118 } 119 120 void CompressedClassSpaceCounters::initialize_performance_counters() { 121 if (UsePerfData) { 122 assert(_perf_counters == NULL, "Should only be initialized once"); 123 const char* ns = "compressedclassspace"; 124 125 if (UseCompressedClassPointers) { 126 size_t min_capacity = 0; 127 _perf_counters = new MetaspacePerfCounters(ns, min_capacity, capacity(), 128 max_capacity(), used()); 129 } else { 130 _perf_counters = new MetaspacePerfCounters(ns, 0, 0, 0, 0); 131 } 132 } 133 }