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src/share/vm/runtime/timer.hpp@fd44df5e3bc3 (annotated)

src/share/vm/runtime/timer.hpp

Wed, 14 Oct 2020 17:44:48 +0800

author

aoqi

date

Wed, 14 Oct 2020 17:44:48 +0800

changeset 9931

fd44df5e3bc3

parent 6876

710a3c8b516e

permissions

-rw-r--r--

Merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#ifndef SHARE_VM_RUNTIME_TIMER_HPP
aoqi@0	26	#define SHARE_VM_RUNTIME_TIMER_HPP
aoqi@0	27
aoqi@0	28	#include "utilities/globalDefinitions.hpp"
aoqi@0	29
aoqi@0	30	// Timers for simple measurement.
aoqi@0	31
aoqi@0	32	class elapsedTimer VALUE_OBJ_CLASS_SPEC {
aoqi@0	33	friend class VMStructs;
aoqi@0	34	private:
aoqi@0	35	jlong _counter;
aoqi@0	36	jlong _start_counter;
aoqi@0	37	bool _active;
aoqi@0	38	public:
aoqi@0	39	elapsedTimer() { _active = false; reset(); }
aoqi@0	40	void add(elapsedTimer t);
aoqi@0	41	void start();
aoqi@0	42	void stop();
aoqi@0	43	void reset() { _counter = 0; }
aoqi@0	44	double seconds() const;
aoqi@0	45	jlong milliseconds() const;
aoqi@0	46	jlong ticks() const { return _counter; }
aoqi@0	47	jlong active_ticks() const;
aoqi@0	48	bool is_active() const { return _active; }
aoqi@0	49	};
aoqi@0	50
aoqi@0	51	// TimeStamp is used for recording when an event took place.
aoqi@0	52	class TimeStamp VALUE_OBJ_CLASS_SPEC {
aoqi@0	53	private:
aoqi@0	54	jlong _counter;
aoqi@0	55	public:
aoqi@0	56	TimeStamp() { _counter = 0; }
aoqi@0	57	void clear() { _counter = 0; }
aoqi@0	58	// has the timestamp been updated since being created or cleared?
aoqi@0	59	bool is_updated() const { return _counter != 0; }
aoqi@0	60	// update to current elapsed time
aoqi@0	61	void update();
aoqi@0	62	// update to given elapsed time
aoqi@0	63	void update_to(jlong ticks);
aoqi@0	64	// returns seconds since updated
aoqi@0	65	// (must not be in a cleared state: must have been previously updated)
aoqi@0	66	double seconds() const;
aoqi@0	67	jlong milliseconds() const;
aoqi@0	68	// ticks elapsed between VM start and last update
aoqi@0	69	jlong ticks() const { return _counter; }
aoqi@0	70	// ticks elapsed since last update
aoqi@0	71	jlong ticks_since_update() const;
aoqi@0	72	};
aoqi@0	73
aoqi@0	74	// TraceTime is used for tracing the execution time of a block
aoqi@0	75	// Usage:
aoqi@0	76	// { TraceTime t("block time")
aoqi@0	77	// some_code();
aoqi@0	78	// }
aoqi@0	79	//
aoqi@0	80
aoqi@0	81	class TraceTime: public StackObj {
aoqi@0	82	private:
aoqi@0	83	bool _active; // do timing
aoqi@0	84	bool _verbose; // report every timing
aoqi@0	85	elapsedTimer _t; // timer
aoqi@0	86	elapsedTimer* _accum; // accumulator
aoqi@0	87	public:
aoqi@0	88	// Constructors
aoqi@0	89	TraceTime(const char* title,
aoqi@0	90	bool doit = true);
aoqi@0	91	TraceTime(const char* title,
aoqi@0	92	elapsedTimer* accumulator,
aoqi@0	93	bool doit = true,
aoqi@0	94	bool verbose = false);
aoqi@0	95	~TraceTime();
aoqi@0	96
aoqi@0	97	// Accessors
aoqi@0	98	void set_verbose(bool verbose) { _verbose = verbose; }
aoqi@0	99	bool verbose() const { return _verbose; }
aoqi@0	100
aoqi@0	101	// Activation
aoqi@0	102	void suspend() { if (_active) _t.stop(); }
aoqi@0	103	void resume() { if (_active) _t.start(); }
aoqi@0	104	};
aoqi@0	105
aoqi@0	106	class TraceCPUTime: public StackObj {
aoqi@0	107	private:
aoqi@0	108	bool _active; // true if times will be measured and printed
aoqi@0	109	bool _print_cr; // if true print carriage return at end
aoqi@0	110	double _starting_user_time; // user time at start of measurement
aoqi@0	111	double _starting_system_time; // system time at start of measurement
aoqi@0	112	double _starting_real_time; // real time at start of measurement
aoqi@0	113	outputStream* _logfile; // output is printed to this stream
aoqi@0	114	bool _error; // true if an error occurred, turns off output
aoqi@0	115
aoqi@0	116	public:
aoqi@0	117	TraceCPUTime(bool doit = true,
aoqi@0	118	bool print_cr = true,
aoqi@0	119	outputStream *logfile = NULL);
aoqi@0	120	~TraceCPUTime();
aoqi@0	121	};
aoqi@0	122
aoqi@0	123	class TimeHelper {
aoqi@0	124	public:
aoqi@0	125	static double counter_to_seconds(jlong counter);
aoqi@0	126	};
aoqi@0	127
aoqi@0	128	#endif // SHARE_VM_RUNTIME_TIMER_HPP