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src/share/vm/gc_implementation/shared/gcTraceTime.cpp@f90c822e73f8 (annotated)

src/share/vm/gc_implementation/shared/gcTraceTime.cpp

Wed, 27 Apr 2016 01:25:04 +0800

author

aoqi

date

Wed, 27 Apr 2016 01:25:04 +0800

changeset 0

f90c822e73f8

child 6876

710a3c8b516e

permissions

-rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2012, 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	#include "precompiled.hpp"
aoqi@0	26	#include "gc_implementation/shared/gcTimer.hpp"
aoqi@0	27	#include "gc_implementation/shared/gcTraceTime.hpp"
aoqi@0	28	#include "runtime/globals.hpp"
aoqi@0	29	#include "runtime/os.hpp"
aoqi@0	30	#include "runtime/safepoint.hpp"
aoqi@0	31	#include "runtime/thread.inline.hpp"
aoqi@0	32	#include "runtime/timer.hpp"
aoqi@0	33	#include "utilities/ostream.hpp"
aoqi@0	34	#include "utilities/ticks.inline.hpp"
aoqi@0	35
aoqi@0	36
aoqi@0	37	GCTraceTime::GCTraceTime(const char* title, bool doit, bool print_cr, GCTimer* timer) :
aoqi@0	38	_title(title), _doit(doit), _print_cr(print_cr), _timer(timer), _start_counter() {
aoqi@0	39	if (_doit || _timer != NULL) {
aoqi@0	40	_start_counter.stamp();
aoqi@0	41	}
aoqi@0	42
aoqi@0	43	if (_timer != NULL) {
aoqi@0	44	assert(SafepointSynchronize::is_at_safepoint(), "Tracing currently only supported at safepoints");
aoqi@0	45	assert(Thread::current()->is_VM_thread(), "Tracing currently only supported from the VM thread");
aoqi@0	46
aoqi@0	47	_timer->register_gc_phase_start(title, _start_counter);
aoqi@0	48	}
aoqi@0	49
aoqi@0	50	if (_doit) {
aoqi@0	51	if (PrintGCTimeStamps) {
aoqi@0	52	gclog_or_tty->stamp();
aoqi@0	53	gclog_or_tty->print(": ");
aoqi@0	54	}
aoqi@0	55	gclog_or_tty->print("[%s", title);
aoqi@0	56	gclog_or_tty->flush();
aoqi@0	57	}
aoqi@0	58	}
aoqi@0	59
aoqi@0	60	GCTraceTime::~GCTraceTime() {
aoqi@0	61	Ticks stop_counter;
aoqi@0	62
aoqi@0	63	if (_doit || _timer != NULL) {
aoqi@0	64	stop_counter.stamp();
aoqi@0	65	}
aoqi@0	66
aoqi@0	67	if (_timer != NULL) {
aoqi@0	68	_timer->register_gc_phase_end(stop_counter);
aoqi@0	69	}
aoqi@0	70
aoqi@0	71	if (_doit) {
aoqi@0	72	const Tickspan duration = stop_counter - _start_counter;
aoqi@0	73	double duration_in_seconds = TicksToTimeHelper::seconds(duration);
aoqi@0	74	if (_print_cr) {
aoqi@0	75	gclog_or_tty->print_cr(", %3.7f secs]", duration_in_seconds);
aoqi@0	76	} else {
aoqi@0	77	gclog_or_tty->print(", %3.7f secs]", duration_in_seconds);
aoqi@0	78	}
aoqi@0	79	gclog_or_tty->flush();
aoqi@0	80	}
aoqi@0	81	}