1 /*
2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2018, SAP and/or its affiliates. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #ifndef SHARE_MEMORY_METASPACE_METASPACESTATISTICS_HPP_
27 #define SHARE_MEMORY_METASPACE_METASPACESTATISTICS_HPP_
28
29 #include "utilities/globalDefinitions.hpp"
30 #include "memory/metaspace.hpp" // for MetadataType enum
31 #include "memory/metaspace/metachunk.hpp" // for ChunkIndex enum
32
33 class outputStream;
34
35 namespace metaspace {
36
37 // Contains statistics for a number of free chunks.
38 class FreeChunksStatistics {
39 uintx _num; // Number of chunks
40 size_t _cap; // Total capacity, in words
41
42 public:
43 FreeChunksStatistics();
44
45 void reset();
46
47 uintx num() const { return _num; }
48 size_t cap() const { return _cap; }
49
50 void add(uintx n, size_t s);
51 void add(const FreeChunksStatistics& other);
52 void print_on(outputStream* st, size_t scale) const;
53
54 }; // end: FreeChunksStatistics
55
56
57 // Contains statistics for a ChunkManager.
58 class ChunkManagerStatistics {
59
60 FreeChunksStatistics _chunk_stats[NumberOfInUseLists];
61
62 public:
63
64 // Free chunk statistics, by chunk index.
65 const FreeChunksStatistics& chunk_stats(ChunkIndex index) const { return _chunk_stats[index]; }
66 FreeChunksStatistics& chunk_stats(ChunkIndex index) { return _chunk_stats[index]; }
67
68 void reset();
69 size_t total_capacity() const;
70
71 void print_on(outputStream* st, size_t scale) const;
72
73 }; // ChunkManagerStatistics
74
75 // Contains statistics for a number of chunks in use.
76 // Each chunk has a used and free portion; however, there are current chunks (serving
77 // potential future metaspace allocations) and non-current chunks. Unused portion of the
78 // former is counted as free, unused portion of the latter counts as waste.
79 class UsedChunksStatistics {
80 uintx _num; // Number of chunks
81 size_t _cap; // Total capacity in words.
82 size_t _used; // Total used area, in words
83 size_t _free; // Total free area (unused portions of current chunks), in words
84 size_t _waste; // Total waste area (unused portions of non-current chunks), in words
85 size_t _overhead; // Total sum of chunk overheads, in words.
86
87 public:
88
89 UsedChunksStatistics();
90
91 void reset();
92
93 uintx num() const { return _num; }
94
95 // Total capacity, in words
96 size_t cap() const { return _cap; }
97
98 // Total used area, in words
99 size_t used() const { return _used; }
100
101 // Total free area (unused portions of current chunks), in words
102 size_t free() const { return _free; }
103
104 // Total waste area (unused portions of non-current chunks), in words
105 size_t waste() const { return _waste; }
106
107 // Total area spent in overhead (chunk headers), in words
108 size_t overhead() const { return _overhead; }
109
110 void add_num(uintx n) { _num += n; }
111 void add_cap(size_t s) { _cap += s; }
112 void add_used(size_t s) { _used += s; }
113 void add_free(size_t s) { _free += s; }
114 void add_waste(size_t s) { _waste += s; }
115 void add_overhead(size_t s) { _overhead += s; }
116
117 void add(const UsedChunksStatistics& other);
118
119 void print_on(outputStream* st, size_t scale) const;
120
121 #ifdef ASSERT
122 void check_sanity() const;
123 #endif
124
125 }; // UsedChunksStatistics
126
127 // Class containing statistics for one or more space managers.
128 class SpaceManagerStatistics {
129
130 UsedChunksStatistics _chunk_stats[NumberOfInUseLists];
131 uintx _free_blocks_num;
132 size_t _free_blocks_cap_words;
133
134 public:
135
136 SpaceManagerStatistics();
137
138 // Chunk statistics by chunk index
139 const UsedChunksStatistics& chunk_stats(ChunkIndex index) const { return _chunk_stats[index]; }
140 UsedChunksStatistics& chunk_stats(ChunkIndex index) { return _chunk_stats[index]; }
141
142 uintx free_blocks_num () const { return _free_blocks_num; }
143 size_t free_blocks_cap_words () const { return _free_blocks_cap_words; }
144
145 void reset();
146
147 void add_free_blocks_info(uintx num, size_t cap);
148
149 // Returns total chunk statistics over all chunk types.
150 UsedChunksStatistics totals() const;
151
152 void add(const SpaceManagerStatistics& other);
153
154 void print_on(outputStream* st, size_t scale, bool detailed) const;
155
156 }; // SpaceManagerStatistics
157
158 class ClassLoaderMetaspaceStatistics {
159
160 SpaceManagerStatistics _sm_stats[Metaspace::MetadataTypeCount];
161
162 public:
163
164 ClassLoaderMetaspaceStatistics();
165
166 const SpaceManagerStatistics& sm_stats(Metaspace::MetadataType mdType) const { return _sm_stats[mdType]; }
167 SpaceManagerStatistics& sm_stats(Metaspace::MetadataType mdType) { return _sm_stats[mdType]; }
168
169 const SpaceManagerStatistics& nonclass_sm_stats() const { return sm_stats(Metaspace::NonClassType); }
170 SpaceManagerStatistics& nonclass_sm_stats() { return sm_stats(Metaspace::NonClassType); }
171 const SpaceManagerStatistics& class_sm_stats() const { return sm_stats(Metaspace::ClassType); }
172 SpaceManagerStatistics& class_sm_stats() { return sm_stats(Metaspace::ClassType); }
173
174 void reset();
175
176 void add(const ClassLoaderMetaspaceStatistics& other);
177
178 // Returns total space manager statistics for both class and non-class metaspace
179 SpaceManagerStatistics totals() const;
180
181 void print_on(outputStream* st, size_t scale, bool detailed) const;
182
183 }; // ClassLoaderMetaspaceStatistics
184
185 } // namespace metaspace
186
187 #endif /* SHARE_MEMORY_METASPACE_METASPACESTATISTICS_HPP_ */
188