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annotate src/share/vm/runtime/timer.hpp @ 18096:ca6d25be853b jdk8u25-b13
8044269: Analysis of archive files.
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Reviewed-by: iklam, dholmes, mschoene
| author | jiangli |
|---|---|
| date | Tue, 12 Aug 2014 17:46:16 -0400 |
| parents | f2110083203d |
| children | c0b0974dd509 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 10405 | 2 * Copyright (c) 1997, 2013, 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 | |
| 1972 | 25 #ifndef SHARE_VM_RUNTIME_TIMER_HPP |
| 26 #define SHARE_VM_RUNTIME_TIMER_HPP | |
| 27 | |
| 28 #include "utilities/globalDefinitions.hpp" | |
| 29 | |
| 0 | 30 // Timers for simple measurement. |
| 31 | |
| 32 class elapsedTimer VALUE_OBJ_CLASS_SPEC { | |
| 33 friend class VMStructs; | |
| 34 private: | |
| 35 jlong _counter; | |
| 36 jlong _start_counter; | |
| 37 bool _active; | |
| 38 public: | |
| 39 elapsedTimer() { _active = false; reset(); } | |
| 40 void add(elapsedTimer t); | |
| 41 void start(); | |
| 42 void stop(); | |
| 43 void reset() { _counter = 0; } | |
| 44 double seconds() const; | |
| 45 jlong milliseconds() const; | |
| 46 jlong ticks() const { return _counter; } | |
| 47 jlong active_ticks() const; | |
| 48 bool is_active() const { return _active; } | |
| 49 }; | |
| 50 | |
| 51 // TimeStamp is used for recording when an event took place. | |
| 52 class TimeStamp VALUE_OBJ_CLASS_SPEC { | |
| 53 private: | |
| 54 jlong _counter; | |
| 55 public: | |
| 56 TimeStamp() { _counter = 0; } | |
| 57 void clear() { _counter = 0; } | |
| 58 // has the timestamp been updated since being created or cleared? | |
| 59 bool is_updated() const { return _counter != 0; } | |
| 60 // update to current elapsed time | |
| 61 void update(); | |
| 62 // update to given elapsed time | |
| 63 void update_to(jlong ticks); | |
| 64 // returns seconds since updated | |
| 65 // (must not be in a cleared state: must have been previously updated) | |
| 66 double seconds() const; | |
| 67 jlong milliseconds() const; | |
| 68 // ticks elapsed between VM start and last update | |
| 69 jlong ticks() const { return _counter; } | |
| 70 // ticks elapsed since last update | |
| 71 jlong ticks_since_update() const; | |
| 72 }; | |
| 73 | |
| 74 // TraceTime is used for tracing the execution time of a block | |
| 75 // Usage: | |
| 76 // { TraceTime t("block time") | |
| 77 // some_code(); | |
| 78 // } | |
| 79 // | |
| 80 | |
| 81 class TraceTime: public StackObj { | |
| 82 private: | |
| 83 bool _active; // do timing | |
| 84 bool _verbose; // report every timing | |
| 85 elapsedTimer _t; // timer | |
| 86 elapsedTimer* _accum; // accumulator | |
| 87 public: | |
| 10405 | 88 // Constructors |
| 0 | 89 TraceTime(const char* title, |
| 10405 | 90 bool doit = true); |
| 0 | 91 TraceTime(const char* title, |
| 92 elapsedTimer* accumulator, | |
| 93 bool doit = true, | |
| 10405 | 94 bool verbose = false); |
| 0 | 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 }; | |
| 1972 | 122 |
| 10405 | 123 class TimeHelper { |
| 124 public: | |
| 125 static double counter_to_seconds(jlong counter); | |
| 126 }; | |
| 127 | |
| 1972 | 128 #endif // SHARE_VM_RUNTIME_TIMER_HPP |