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annotate src/share/vm/gc_implementation/shared/gSpaceCounters.hpp @ 1562:dfe27f03244a
Merge
author | trims |
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date | Tue, 01 Jun 2010 11:48:33 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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0 | 1 /* |
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2 * Copyright (c) 2002, 2004, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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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. |
0 | 22 * |
23 */ | |
24 | |
25 // A GSpaceCounter is a holder class for performance counters | |
26 // that track a space; | |
27 | |
28 class GSpaceCounters: public CHeapObj { | |
29 friend class VMStructs; | |
30 | |
31 private: | |
32 PerfVariable* _capacity; | |
33 PerfVariable* _used; | |
34 | |
35 // Constant PerfData types don't need to retain a reference. | |
36 // However, it's a good idea to document them here. | |
37 // PerfConstant* _size; | |
38 | |
39 Generation* _gen; | |
40 char* _name_space; | |
41 | |
42 public: | |
43 | |
44 GSpaceCounters(const char* name, int ordinal, size_t max_size, Generation* g, | |
45 GenerationCounters* gc, bool sampled=true); | |
46 | |
47 ~GSpaceCounters() { | |
48 if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space); | |
49 } | |
50 | |
51 inline void update_capacity() { | |
52 _capacity->set_value(_gen->capacity()); | |
53 } | |
54 | |
55 inline void update_used() { | |
56 _used->set_value(_gen->used()); | |
57 } | |
58 | |
59 // special version of update_used() to allow the used value to be | |
60 // passed as a parameter. This method can can be used in cases were | |
61 // the utilization is already known and/or when the _gen->used() | |
62 // method is known to be expensive and we want to avoid unnecessary | |
63 // calls to it. | |
64 // | |
65 inline void update_used(size_t used) { | |
66 _used->set_value(used); | |
67 } | |
68 | |
69 inline void inc_used(size_t size) { | |
70 _used->inc(size); | |
71 } | |
72 | |
73 debug_only( | |
74 // for security reasons, we do not allow arbitrary reads from | |
75 // the counters as they may live in shared memory. | |
76 jlong used() { | |
77 return _used->get_value(); | |
78 } | |
79 jlong capacity() { | |
80 return _used->get_value(); | |
81 } | |
82 ) | |
83 | |
84 inline void update_all() { | |
85 update_used(); | |
86 update_capacity(); | |
87 } | |
88 | |
89 const char* name_space() const { return _name_space; } | |
90 }; | |
91 | |
92 class GenerationUsedHelper : public PerfLongSampleHelper { | |
93 private: | |
94 Generation* _gen; | |
95 | |
96 public: | |
97 GenerationUsedHelper(Generation* g) : _gen(g) { } | |
98 | |
99 inline jlong take_sample() { | |
100 return _gen->used(); | |
101 } | |
102 }; |