Mercurial > hg > truffle
annotate src/share/vm/runtime/timer.hpp @ 6972:bd7a7ce2e264
6830717: replay of compilations would help with debugging
Summary: When java process crashed in compiler thread, repeat the compilation process will help finding root cause. This is done with using SA dump application class data and replay data from core dump, then use debug version of jvm to recompile the problematic java method.
Reviewed-by: kvn, twisti, sspitsyn
Contributed-by: yumin.qi@oracle.com
| author | minqi |
|---|---|
| date | Mon, 12 Nov 2012 14:03:53 -0800 |
| parents | f95d63e2154a |
| children | f2110083203d |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 2010, 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 bool _print_cr; // add a CR to the end of the timer report | |
| 86 elapsedTimer _t; // timer | |
| 87 elapsedTimer* _accum; // accumulator | |
| 88 outputStream* _logfile; // output log file | |
| 89 public: | |
| 90 // Constuctors | |
| 91 TraceTime(const char* title, | |
| 92 bool doit = true, | |
| 93 bool print_cr = true, | |
| 94 outputStream *logfile = NULL); | |
| 95 TraceTime(const char* title, | |
| 96 elapsedTimer* accumulator, | |
| 97 bool doit = true, | |
| 98 bool verbose = false, | |
| 99 outputStream *logfile = NULL ); | |
| 100 ~TraceTime(); | |
| 101 | |
| 102 // Accessors | |
| 103 void set_verbose(bool verbose) { _verbose = verbose; } | |
| 104 bool verbose() const { return _verbose; } | |
| 105 | |
| 106 // Activation | |
| 107 void suspend() { if (_active) _t.stop(); } | |
| 108 void resume() { if (_active) _t.start(); } | |
| 109 }; | |
| 110 | |
| 111 class TraceCPUTime: public StackObj { | |
| 112 private: | |
| 113 bool _active; // true if times will be measured and printed | |
| 114 bool _print_cr; // if true print carriage return at end | |
| 115 double _starting_user_time; // user time at start of measurement | |
| 116 double _starting_system_time; // system time at start of measurement | |
| 117 double _starting_real_time; // real time at start of measurement | |
| 118 outputStream* _logfile; // output is printed to this stream | |
| 119 bool _error; // true if an error occurred, turns off output | |
| 120 | |
| 121 public: | |
| 122 TraceCPUTime(bool doit = true, | |
| 123 bool print_cr = true, | |
| 124 outputStream *logfile = NULL); | |
| 125 ~TraceCPUTime(); | |
| 126 }; | |
| 1972 | 127 |
| 128 #endif // SHARE_VM_RUNTIME_TIMER_HPP |