Mercurial > hg > truffle
annotate src/share/vm/runtime/timer.hpp @ 1604:b918d354830a
6960865: ldc of unloaded class throws an assert in ciTypeFlow
Summary: Support java_mirror for unloaded klasses, arrays as well as instances. Simplify ciTypeFlow by removing unused path.
Reviewed-by: kvn
author | jrose |
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date | Sat, 12 Jun 2010 22:53:43 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved. |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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6941466: Oracle rebranding changes for Hotspot repositories
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 // Timers for simple measurement. | |
26 | |
27 class elapsedTimer VALUE_OBJ_CLASS_SPEC { | |
28 friend class VMStructs; | |
29 private: | |
30 jlong _counter; | |
31 jlong _start_counter; | |
32 bool _active; | |
33 public: | |
34 elapsedTimer() { _active = false; reset(); } | |
35 void add(elapsedTimer t); | |
36 void start(); | |
37 void stop(); | |
38 void reset() { _counter = 0; } | |
39 double seconds() const; | |
40 jlong milliseconds() const; | |
41 jlong ticks() const { return _counter; } | |
42 jlong active_ticks() const; | |
43 bool is_active() const { return _active; } | |
44 }; | |
45 | |
46 // TimeStamp is used for recording when an event took place. | |
47 class TimeStamp VALUE_OBJ_CLASS_SPEC { | |
48 private: | |
49 jlong _counter; | |
50 public: | |
51 TimeStamp() { _counter = 0; } | |
52 void clear() { _counter = 0; } | |
53 // has the timestamp been updated since being created or cleared? | |
54 bool is_updated() const { return _counter != 0; } | |
55 // update to current elapsed time | |
56 void update(); | |
57 // update to given elapsed time | |
58 void update_to(jlong ticks); | |
59 // returns seconds since updated | |
60 // (must not be in a cleared state: must have been previously updated) | |
61 double seconds() const; | |
62 jlong milliseconds() const; | |
63 // ticks elapsed between VM start and last update | |
64 jlong ticks() const { return _counter; } | |
65 // ticks elapsed since last update | |
66 jlong ticks_since_update() const; | |
67 }; | |
68 | |
69 // TraceTime is used for tracing the execution time of a block | |
70 // Usage: | |
71 // { TraceTime t("block time") | |
72 // some_code(); | |
73 // } | |
74 // | |
75 | |
76 class TraceTime: public StackObj { | |
77 private: | |
78 bool _active; // do timing | |
79 bool _verbose; // report every timing | |
80 bool _print_cr; // add a CR to the end of the timer report | |
81 elapsedTimer _t; // timer | |
82 elapsedTimer* _accum; // accumulator | |
83 outputStream* _logfile; // output log file | |
84 public: | |
85 // Constuctors | |
86 TraceTime(const char* title, | |
87 bool doit = true, | |
88 bool print_cr = true, | |
89 outputStream *logfile = NULL); | |
90 TraceTime(const char* title, | |
91 elapsedTimer* accumulator, | |
92 bool doit = true, | |
93 bool verbose = false, | |
94 outputStream *logfile = NULL ); | |
95 ~TraceTime(); | |
96 | |
97 // Accessors | |
98 void set_verbose(bool verbose) { _verbose = verbose; } | |
99 bool verbose() const { return _verbose; } | |
100 | |
101 // Activation | |
102 void suspend() { if (_active) _t.stop(); } | |
103 void resume() { if (_active) _t.start(); } | |
104 }; | |
105 | |
106 class TraceCPUTime: public StackObj { | |
107 private: | |
108 bool _active; // true if times will be measured and printed | |
109 bool _print_cr; // if true print carriage return at end | |
110 double _starting_user_time; // user time at start of measurement | |
111 double _starting_system_time; // system time at start of measurement | |
112 double _starting_real_time; // real time at start of measurement | |
113 outputStream* _logfile; // output is printed to this stream | |
114 bool _error; // true if an error occurred, turns off output | |
115 | |
116 public: | |
117 TraceCPUTime(bool doit = true, | |
118 bool print_cr = true, | |
119 outputStream *logfile = NULL); | |
120 ~TraceCPUTime(); | |
121 }; |