| /* |
| * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_RUNTIME_TIMER_HPP |
| #define SHARE_VM_RUNTIME_TIMER_HPP |
| |
| #include "utilities/globalDefinitions.hpp" |
| |
| // Timers for simple measurement. |
| |
| class elapsedTimer VALUE_OBJ_CLASS_SPEC { |
| friend class VMStructs; |
| private: |
| jlong _counter; |
| jlong _start_counter; |
| bool _active; |
| public: |
| elapsedTimer() { _active = false; reset(); } |
| void add(elapsedTimer t); |
| void start(); |
| void stop(); |
| void reset() { _counter = 0; } |
| double seconds() const; |
| jlong milliseconds() const; |
| jlong ticks() const { return _counter; } |
| jlong active_ticks() const; |
| bool is_active() const { return _active; } |
| }; |
| |
| // TimeStamp is used for recording when an event took place. |
| class TimeStamp VALUE_OBJ_CLASS_SPEC { |
| private: |
| jlong _counter; |
| public: |
| TimeStamp() { _counter = 0; } |
| void clear() { _counter = 0; } |
| // has the timestamp been updated since being created or cleared? |
| bool is_updated() const { return _counter != 0; } |
| // update to current elapsed time |
| void update(); |
| // update to given elapsed time |
| void update_to(jlong ticks); |
| // returns seconds since updated |
| // (must not be in a cleared state: must have been previously updated) |
| double seconds() const; |
| jlong milliseconds() const; |
| // ticks elapsed between VM start and last update |
| jlong ticks() const { return _counter; } |
| // ticks elapsed since last update |
| jlong ticks_since_update() const; |
| }; |
| |
| // TraceTime is used for tracing the execution time of a block |
| // Usage: |
| // { TraceTime t("block time") |
| // some_code(); |
| // } |
| // |
| |
| class TraceTime: public StackObj { |
| private: |
| bool _active; // do timing |
| bool _verbose; // report every timing |
| elapsedTimer _t; // timer |
| elapsedTimer* _accum; // accumulator |
| public: |
| // Constructors |
| TraceTime(const char* title, |
| bool doit = true); |
| TraceTime(const char* title, |
| elapsedTimer* accumulator, |
| bool doit = true, |
| bool verbose = false); |
| ~TraceTime(); |
| |
| // Accessors |
| void set_verbose(bool verbose) { _verbose = verbose; } |
| bool verbose() const { return _verbose; } |
| |
| // Activation |
| void suspend() { if (_active) _t.stop(); } |
| void resume() { if (_active) _t.start(); } |
| }; |
| |
| class TraceCPUTime: public StackObj { |
| private: |
| bool _active; // true if times will be measured and printed |
| bool _print_cr; // if true print carriage return at end |
| double _starting_user_time; // user time at start of measurement |
| double _starting_system_time; // system time at start of measurement |
| double _starting_real_time; // real time at start of measurement |
| outputStream* _logfile; // output is printed to this stream |
| bool _error; // true if an error occurred, turns off output |
| |
| public: |
| TraceCPUTime(bool doit = true, |
| bool print_cr = true, |
| outputStream *logfile = NULL); |
| ~TraceCPUTime(); |
| }; |
| |
| class TimeHelper { |
| public: |
| static double counter_to_seconds(jlong counter); |
| static double counter_to_millis(jlong counter); |
| }; |
| |
| #endif // SHARE_VM_RUNTIME_TIMER_HPP |