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src/os/linux/vm/threadCritical_linux.cpp@e72f7eecc96d (annotated)

src/os/linux/vm/threadCritical_linux.cpp

Tue, 28 May 2013 09:32:06 +0200

author

tschatzl

date

Tue, 28 May 2013 09:32:06 +0200

changeset 5204

e72f7eecc96d

parent 4299

f34d701e952e

child 6876

710a3c8b516e

permissions

-rw-r--r--

8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
Summary: Fixed the output of G1SummarizeRSetStats: too small datatype for the number of concurrently processed cards, added concurrent remembered set thread time retrieval for Linux and Windows (BSD uses os::elapsedTime() now), and other cleanup. The information presented during VM operation is now relative to the previous output, not always cumulative if G1SummarizeRSetStatsPeriod > 0. At VM exit, the code prints a cumulative summary.
Reviewed-by: johnc, jwilhelm

duke@435	1	/*
stefank@2314	2	* Copyright (c) 2001, 2010, Oracle and/or its affiliates. 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	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#include "precompiled.hpp"
stefank@4299	26	#include "runtime/thread.inline.hpp"
stefank@2314	27	#include "runtime/threadCritical.hpp"
duke@435	28
duke@435	29	// put OS-includes here
duke@435	30	# include <pthread.h>
duke@435	31
duke@435	32	//
duke@435	33	// See threadCritical.hpp for details of this class.
duke@435	34	//
duke@435	35
duke@435	36	static pthread_t tc_owner = 0;
duke@435	37	static pthread_mutex_t tc_mutex = PTHREAD_MUTEX_INITIALIZER;
duke@435	38	static int tc_count = 0;
duke@435	39
duke@435	40	void ThreadCritical::initialize() {
duke@435	41	}
duke@435	42
duke@435	43	void ThreadCritical::release() {
duke@435	44	}
duke@435	45
duke@435	46	ThreadCritical::ThreadCritical() {
duke@435	47	pthread_t self = pthread_self();
duke@435	48	if (self != tc_owner) {
duke@435	49	int ret = pthread_mutex_lock(&tc_mutex);
duke@435	50	guarantee(ret == 0, "fatal error with pthread_mutex_lock()");
duke@435	51	assert(tc_count == 0, "Lock acquired with illegal reentry count.");
duke@435	52	tc_owner = self;
duke@435	53	}
duke@435	54	tc_count++;
duke@435	55	}
duke@435	56
duke@435	57	ThreadCritical::~ThreadCritical() {
duke@435	58	assert(tc_owner == pthread_self(), "must have correct owner");
duke@435	59	assert(tc_count > 0, "must have correct count");
duke@435	60
duke@435	61	tc_count--;
duke@435	62	if (tc_count == 0) {
duke@435	63	tc_owner = 0;
duke@435	64	int ret = pthread_mutex_unlock(&tc_mutex);
duke@435	65	guarantee(ret == 0, "fatal error with pthread_mutex_unlock()");
duke@435	66	}
duke@435	67	}