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1 /*
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2 * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // Timers for simple measurement.
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26
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27 class elapsedTimer VALUE_OBJ_CLASS_SPEC {
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28 friend class VMStructs;
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29 private:
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30 jlong _counter;
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31 jlong _start_counter;
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32 bool _active;
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33 public:
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34 elapsedTimer() { _active = false; reset(); }
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35 void add(elapsedTimer t);
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36 void start();
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37 void stop();
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38 void reset() { _counter = 0; }
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39 double seconds() const;
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40 jlong milliseconds() const;
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41 jlong ticks() const { return _counter; }
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42 jlong active_ticks() const;
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43 bool is_active() const { return _active; }
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44 };
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45
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46 // TimeStamp is used for recording when an event took place.
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47 class TimeStamp VALUE_OBJ_CLASS_SPEC {
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48 private:
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49 jlong _counter;
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50 public:
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51 TimeStamp() { _counter = 0; }
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52 void clear() { _counter = 0; }
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53 // has the timestamp been updated since being created or cleared?
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54 bool is_updated() const { return _counter != 0; }
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55 // update to current elapsed time
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56 void update();
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57 // update to given elapsed time
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58 void update_to(jlong ticks);
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59 // returns seconds since updated
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60 // (must not be in a cleared state: must have been previously updated)
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61 double seconds() const;
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62 jlong milliseconds() const;
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63 // ticks elapsed between VM start and last update
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64 jlong ticks() const { return _counter; }
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65 // ticks elapsed since last update
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66 jlong ticks_since_update() const;
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67 };
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68
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69 // TraceTime is used for tracing the execution time of a block
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70 // Usage:
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71 // { TraceTime t("block time")
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72 // some_code();
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73 // }
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74 //
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75
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76 class TraceTime: public StackObj {
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77 private:
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78 bool _active; // do timing
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79 bool _verbose; // report every timing
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80 bool _print_cr; // add a CR to the end of the timer report
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81 elapsedTimer _t; // timer
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82 elapsedTimer* _accum; // accumulator
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83 outputStream* _logfile; // output log file
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84 public:
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85 // Constuctors
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86 TraceTime(const char* title,
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87 bool doit = true,
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88 bool print_cr = true,
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89 outputStream *logfile = NULL);
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90 TraceTime(const char* title,
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91 elapsedTimer* accumulator,
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92 bool doit = true,
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93 bool verbose = false,
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94 outputStream *logfile = NULL );
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95 ~TraceTime();
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96
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97 // Accessors
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98 void set_verbose(bool verbose) { _verbose = verbose; }
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99 bool verbose() const { return _verbose; }
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100
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101 // Activation
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102 void suspend() { if (_active) _t.stop(); }
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103 void resume() { if (_active) _t.start(); }
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104 };
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105
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106 class TraceCPUTime: public StackObj {
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107 private:
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108 bool _active; // true if times will be measured and printed
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109 bool _print_cr; // if true print carriage return at end
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110 double _starting_user_time; // user time at start of measurement
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111 double _starting_system_time; // system time at start of measurement
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112 double _starting_real_time; // real time at start of measurement
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113 outputStream* _logfile; // output is printed to this stream
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114 bool _error; // true if an error occurred, turns off output
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115
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116 public:
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117 TraceCPUTime(bool doit = true,
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118 bool print_cr = true,
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119 outputStream *logfile = NULL);
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120 ~TraceCPUTime();
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121 };
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