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src/share/vm/runtime/timer.hpp@fb57d4cf76c2 (annotated)

src/share/vm/runtime/timer.hpp

Tue, 11 May 2010 14:35:43 -0700

author

prr

date

Tue, 11 May 2010 14:35:43 -0700

changeset 1840

fb57d4cf76c2

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6931180: Migration to recent versions of MS Platform SDK
6951582: Build problems on win64
Summary: Changes to enable building JDK7 with Microsoft Visual Studio 2010
Reviewed-by: ohair, art, ccheung, dcubed

duke@435	1	/*
duke@435	2	* Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// Timers for simple measurement.
duke@435	26
duke@435	27	class elapsedTimer VALUE_OBJ_CLASS_SPEC {
duke@435	28	friend class VMStructs;
duke@435	29	private:
duke@435	30	jlong _counter;
duke@435	31	jlong _start_counter;
duke@435	32	bool _active;
duke@435	33	public:
duke@435	34	elapsedTimer() { _active = false; reset(); }
duke@435	35	void add(elapsedTimer t);
duke@435	36	void start();
duke@435	37	void stop();
duke@435	38	void reset() { _counter = 0; }
duke@435	39	double seconds() const;
duke@435	40	jlong milliseconds() const;
duke@435	41	jlong ticks() const { return _counter; }
duke@435	42	jlong active_ticks() const;
duke@435	43	bool is_active() const { return _active; }
duke@435	44	};
duke@435	45
duke@435	46	// TimeStamp is used for recording when an event took place.
duke@435	47	class TimeStamp VALUE_OBJ_CLASS_SPEC {
duke@435	48	private:
duke@435	49	jlong _counter;
duke@435	50	public:
duke@435	51	TimeStamp() { _counter = 0; }
duke@435	52	void clear() { _counter = 0; }
duke@435	53	// has the timestamp been updated since being created or cleared?
duke@435	54	bool is_updated() const { return _counter != 0; }
duke@435	55	// update to current elapsed time
duke@435	56	void update();
duke@435	57	// update to given elapsed time
duke@435	58	void update_to(jlong ticks);
duke@435	59	// returns seconds since updated
duke@435	60	// (must not be in a cleared state: must have been previously updated)
duke@435	61	double seconds() const;
duke@435	62	jlong milliseconds() const;
duke@435	63	// ticks elapsed between VM start and last update
duke@435	64	jlong ticks() const { return _counter; }
duke@435	65	// ticks elapsed since last update
duke@435	66	jlong ticks_since_update() const;
duke@435	67	};
duke@435	68
duke@435	69	// TraceTime is used for tracing the execution time of a block
duke@435	70	// Usage:
duke@435	71	// { TraceTime t("block time")
duke@435	72	// some_code();
duke@435	73	// }
duke@435	74	//
duke@435	75
duke@435	76	class TraceTime: public StackObj {
duke@435	77	private:
duke@435	78	bool _active; // do timing
duke@435	79	bool _verbose; // report every timing
duke@435	80	bool _print_cr; // add a CR to the end of the timer report
duke@435	81	elapsedTimer _t; // timer
duke@435	82	elapsedTimer* _accum; // accumulator
duke@435	83	outputStream* _logfile; // output log file
duke@435	84	public:
duke@435	85	// Constuctors
duke@435	86	TraceTime(const char* title,
duke@435	87	bool doit = true,
duke@435	88	bool print_cr = true,
duke@435	89	outputStream *logfile = NULL);
duke@435	90	TraceTime(const char* title,
duke@435	91	elapsedTimer* accumulator,
duke@435	92	bool doit = true,
duke@435	93	bool verbose = false,
duke@435	94	outputStream *logfile = NULL );
duke@435	95	~TraceTime();
duke@435	96
duke@435	97	// Accessors
duke@435	98	void set_verbose(bool verbose) { _verbose = verbose; }
duke@435	99	bool verbose() const { return _verbose; }
duke@435	100
duke@435	101	// Activation
duke@435	102	void suspend() { if (_active) _t.stop(); }
duke@435	103	void resume() { if (_active) _t.start(); }
duke@435	104	};
duke@435	105
duke@435	106	class TraceCPUTime: public StackObj {
duke@435	107	private:
duke@435	108	bool _active; // true if times will be measured and printed
duke@435	109	bool _print_cr; // if true print carriage return at end
duke@435	110	double _starting_user_time; // user time at start of measurement
duke@435	111	double _starting_system_time; // system time at start of measurement
duke@435	112	double _starting_real_time; // real time at start of measurement
duke@435	113	outputStream* _logfile; // output is printed to this stream
duke@435	114	bool _error; // true if an error occurred, turns off output
duke@435	115
duke@435	116	public:
duke@435	117	TraceCPUTime(bool doit = true,
duke@435	118	bool print_cr = true,
duke@435	119	outputStream *logfile = NULL);
duke@435	120	~TraceCPUTime();
duke@435	121	};