1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/runtime/timer.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,121 @@
1.4 +/*
1.5 + * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +// Timers for simple measurement.
1.29 +
1.30 +class elapsedTimer VALUE_OBJ_CLASS_SPEC {
1.31 + friend class VMStructs;
1.32 + private:
1.33 + jlong _counter;
1.34 + jlong _start_counter;
1.35 + bool _active;
1.36 + public:
1.37 + elapsedTimer() { _active = false; reset(); }
1.38 + void add(elapsedTimer t);
1.39 + void start();
1.40 + void stop();
1.41 + void reset() { _counter = 0; }
1.42 + double seconds() const;
1.43 + jlong milliseconds() const;
1.44 + jlong ticks() const { return _counter; }
1.45 + jlong active_ticks() const;
1.46 + bool is_active() const { return _active; }
1.47 +};
1.48 +
1.49 +// TimeStamp is used for recording when an event took place.
1.50 +class TimeStamp VALUE_OBJ_CLASS_SPEC {
1.51 + private:
1.52 + jlong _counter;
1.53 + public:
1.54 + TimeStamp() { _counter = 0; }
1.55 + void clear() { _counter = 0; }
1.56 + // has the timestamp been updated since being created or cleared?
1.57 + bool is_updated() const { return _counter != 0; }
1.58 + // update to current elapsed time
1.59 + void update();
1.60 + // update to given elapsed time
1.61 + void update_to(jlong ticks);
1.62 + // returns seconds since updated
1.63 + // (must not be in a cleared state: must have been previously updated)
1.64 + double seconds() const;
1.65 + jlong milliseconds() const;
1.66 + // ticks elapsed between VM start and last update
1.67 + jlong ticks() const { return _counter; }
1.68 + // ticks elapsed since last update
1.69 + jlong ticks_since_update() const;
1.70 +};
1.71 +
1.72 +// TraceTime is used for tracing the execution time of a block
1.73 +// Usage:
1.74 +// { TraceTime t("block time")
1.75 +// some_code();
1.76 +// }
1.77 +//
1.78 +
1.79 +class TraceTime: public StackObj {
1.80 + private:
1.81 + bool _active; // do timing
1.82 + bool _verbose; // report every timing
1.83 + bool _print_cr; // add a CR to the end of the timer report
1.84 + elapsedTimer _t; // timer
1.85 + elapsedTimer* _accum; // accumulator
1.86 + outputStream* _logfile; // output log file
1.87 + public:
1.88 + // Constuctors
1.89 + TraceTime(const char* title,
1.90 + bool doit = true,
1.91 + bool print_cr = true,
1.92 + outputStream *logfile = NULL);
1.93 + TraceTime(const char* title,
1.94 + elapsedTimer* accumulator,
1.95 + bool doit = true,
1.96 + bool verbose = false,
1.97 + outputStream *logfile = NULL );
1.98 + ~TraceTime();
1.99 +
1.100 + // Accessors
1.101 + void set_verbose(bool verbose) { _verbose = verbose; }
1.102 + bool verbose() const { return _verbose; }
1.103 +
1.104 + // Activation
1.105 + void suspend() { if (_active) _t.stop(); }
1.106 + void resume() { if (_active) _t.start(); }
1.107 +};
1.108 +
1.109 +class TraceCPUTime: public StackObj {
1.110 + private:
1.111 + bool _active; // true if times will be measured and printed
1.112 + bool _print_cr; // if true print carriage return at end
1.113 + double _starting_user_time; // user time at start of measurement
1.114 + double _starting_system_time; // system time at start of measurement
1.115 + double _starting_real_time; // real time at start of measurement
1.116 + outputStream* _logfile; // output is printed to this stream
1.117 + bool _error; // true if an error occurred, turns off output
1.118 +
1.119 + public:
1.120 + TraceCPUTime(bool doit = true,
1.121 + bool print_cr = true,
1.122 + outputStream *logfile = NULL);
1.123 + ~TraceCPUTime();
1.124 +};
