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comparison src/share/vm/gc_implementation/shared/collectorCounters.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2002-2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 // CollectorCounters is a holder class for performance counters
26 // that track a collector
27
28 class CollectorCounters: public CHeapObj {
29 friend class VMStructs;
30
31 private:
32 PerfCounter* _invocations;
33 PerfCounter* _time;
34 PerfVariable* _last_entry_time;
35 PerfVariable* _last_exit_time;
36
37 // Constant PerfData types don't need to retain a reference.
38 // However, it's a good idea to document them here.
39 // PerfStringConstant* _name;
40
41 char* _name_space;
42
43 public:
44
45 CollectorCounters(const char* name, int ordinal);
46
47 ~CollectorCounters() {
48 if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space);
49 }
50
51 inline PerfCounter* invocation_counter() const { return _invocations; }
52
53 inline PerfCounter* time_counter() const { return _time; }
54
55 inline PerfVariable* last_entry_counter() const { return _last_entry_time; }
56
57 inline PerfVariable* last_exit_counter() const { return _last_exit_time; }
58
59 const char* name_space() const { return _name_space; }
60 };
61
62 class TraceCollectorStats: public PerfTraceTimedEvent {
63
64 protected:
65 CollectorCounters* _c;
66
67 public:
68 inline TraceCollectorStats(CollectorCounters* c) :
69 PerfTraceTimedEvent(c->time_counter(), c->invocation_counter()),
70 _c(c) {
71
72 if (UsePerfData) {
73 _c->last_entry_counter()->set_value(os::elapsed_counter());
74 }
75 }
76
77 inline ~TraceCollectorStats() {
78 if (UsePerfData) _c->last_exit_counter()->set_value(os::elapsed_counter());
79 }
80 };