1 /*
2 * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2020 SAP SE. 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_INTERNSTAT_HPP
27 #define SHARE_MEMORY_METASPACE_INTERNSTAT_HPP
28
29 #include "memory/allocation.hpp"
30 #include "runtime/atomic.hpp"
31 #include "utilities/globalDefinitions.hpp"
32
33 class outputStream;
34
35 namespace metaspace {
36
37
38 // These are some counters useful for debugging and analyzing Metaspace problems.
39 // They get printed as part of the Metaspace report (e.g. via jcmd VM.metaspace)
40
41 class InternalStats : public AllStatic {
42
43 // Note: all counters which are modified on the classloader local allocation path
44 // (not under ExpandLock protection) have to be atomic.
45
46 #define ALL_MY_COUNTERS(x, x_atomic) \
47 \
48 /* Number of allocations. */ \
49 DEBUG_ONLY(x_atomic(num_allocs)) \
50 \
51 /* Number of external deallocations */ \
52 /* (excluding retired chunk remains) */ \
53 DEBUG_ONLY(x_atomic(num_deallocs)) \
54 \
55 /* Number of times an allocation was satisfied */ \
56 /* from deallocated blocks. */ \
57 DEBUG_ONLY(x_atomic(num_allocs_from_deallocated_blocks)) \
58 \
59 /* Number of times an arena retired a chunk */ \
60 DEBUG_ONLY(x_atomic(num_chunks_retired)) \
61 \
62 /* Number of times an allocation failed */ \
63 /* because we hit a limit. */ \
64 x_atomic(num_allocs_failed_limit) \
65 \
66 /* Number of times an arena was born ... */ \
67 x_atomic(num_arena_births) \
68 /* ... and died. */ \
69 x_atomic(num_arena_deaths) \
70 \
71 /* Number of times VirtualSpaceNode were */ \
72 /* born... */ \
73 x(num_vsnodes_births) \
74 /* ... and died. */ \
75 x(num_vsnodes_deaths) \
76 \
77 /* Number of times we committed space. */ \
78 x(num_space_committed) \
79 /* Number of times we uncommitted space. */ \
80 x(num_space_uncommitted) \
81 \
82 /* Number of times a chunk was returned to the */ \
83 /* freelist (external only). */ \
84 x(num_chunks_returned_to_freelist) \
85 /* Number of times a chunk was taken from */ \
86 /* freelist (external only) */ \
87 x(num_chunks_taken_from_freelist) \
88 \
89 /* Number of successful chunk merges */ \
90 x(num_chunk_merges) \
91 /* Number of chunk splits */ \
92 x(num_chunk_splits) \
93 /* Number of chunk in place enlargements */ \
94 x(num_chunks_enlarged) \
95 \
96 /* Number of times we did a purge */ \
97 x(num_purges) \
98
99
100 #define DEFINE_COUNTER(name) static uint64_t _##name;
101 #define DEFINE_ATOMIC_COUNTER(name) static volatile uint64_t _##name;
102 ALL_MY_COUNTERS(DEFINE_COUNTER, DEFINE_ATOMIC_COUNTER)
103 #undef DEFINE_COUNTER
104 #undef DEFINE_ATOMIC_COUNTER
105
106 public:
107
108 // incrementors
109 #define INCREMENTOR(name) static void inc_##name() { _##name ++; }
110 #define INCREMENTOR_ATOMIC(name) static void inc_##name() { Atomic::inc(&_##name); }
111 ALL_MY_COUNTERS(INCREMENTOR, INCREMENTOR_ATOMIC)
112 #undef INCREMENTOR
113 #undef INCREMENTOR_ATOMIC
114
115 // getters
116 #define GETTER(name) static uint64_t name() { return _##name; }
117 ALL_MY_COUNTERS(GETTER, GETTER)
118 #undef GETTER
119
120
121 static void print_on(outputStream* st);
122
123
124 };
125
126 } // namespace metaspace
127
128 #endif // SHARE_MEMORY_METASPACE_INTERNSTAT_HPP