1 /* 2 * Copyright (c) 1997, 2006, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 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 };