1 /*
2 * Copyright (c) 2012, 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<mtInternal> {
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::calculate_capacity() {
69 // The total capacity is the sum of
70 // 1) capacity of Metachunks in use by all Metaspaces
71 // 2) unused space at the end of each Metachunk
72 // 3) space in the freelist
73 size_t total_capacity = MetaspaceAux::allocated_capacity_bytes()
74 + MetaspaceAux::free_bytes() + MetaspaceAux::free_chunks_total_in_bytes();
75 return total_capacity;
76 }
77
78 void MetaspaceCounters::initialize_performance_counters() {
79 if (UsePerfData) {
80 assert(_perf_counters == NULL, "Should only be initialized once");
81
82 size_t min_capacity = MetaspaceAux::min_chunk_size();
83 size_t capacity = calculate_capacity();
84 size_t max_capacity = MetaspaceAux::reserved_in_bytes();
85 size_t used = MetaspaceAux::allocated_used_bytes();
86
87 _perf_counters = new MetaspacePerfCounters("metaspace", min_capacity, capacity, max_capacity, used);
88 }
89 }
90
91 void MetaspaceCounters::update_performance_counters() {
92 if (UsePerfData) {
93 assert(_perf_counters != NULL, "Should be initialized");
94
95 size_t capacity = calculate_capacity();
96 size_t max_capacity = MetaspaceAux::reserved_in_bytes();
97 size_t used = MetaspaceAux::allocated_used_bytes();
98
99 _perf_counters->update(capacity, max_capacity, used);
100 }
101 }
102
103 MetaspacePerfCounters* CompressedClassSpaceCounters::_perf_counters = NULL;
104
105 size_t CompressedClassSpaceCounters::calculate_capacity() {
106 return MetaspaceAux::allocated_capacity_bytes(_class_type) +
107 MetaspaceAux::free_bytes(_class_type) +
108 MetaspaceAux::free_chunks_total_in_bytes(_class_type);
109 }
110
111 void CompressedClassSpaceCounters::update_performance_counters() {
112 if (UsePerfData && UseCompressedClassPointers) {
113 assert(_perf_counters != NULL, "Should be initialized");
114
115 size_t capacity = calculate_capacity();
116 size_t max_capacity = MetaspaceAux::reserved_in_bytes(_class_type);
117 size_t used = MetaspaceAux::allocated_used_bytes(_class_type);
118
119 _perf_counters->update(capacity, max_capacity, used);
120 }
121 }
122
123 void CompressedClassSpaceCounters::initialize_performance_counters() {
124 if (UsePerfData) {
125 assert(_perf_counters == NULL, "Should only be initialized once");
126 const char* ns = "compressedclassspace";
127
128 if (UseCompressedClassPointers) {
129 size_t min_capacity = MetaspaceAux::min_chunk_size();
130 size_t capacity = calculate_capacity();
131 size_t max_capacity = MetaspaceAux::reserved_in_bytes(_class_type);
132 size_t used = MetaspaceAux::allocated_used_bytes(_class_type);
133
134 _perf_counters = new MetaspacePerfCounters(ns, min_capacity, capacity, max_capacity, used);
135 } else {
136 _perf_counters = new MetaspacePerfCounters(ns, 0, 0, 0, 0);
137 }
138 }
139 }