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src/os/linux/vm/osThread_linux.cpp@4c84d351cca9 (annotated)

src/os/linux/vm/osThread_linux.cpp

Fri, 16 Aug 2013 13:22:32 +0200

author

stefank

date

Fri, 16 Aug 2013 13:22:32 +0200

changeset 5578

4c84d351cca9

parent 4318

cd3d6a6b95d9

child 6876

710a3c8b516e

permissions

-rw-r--r--

8007074: SIGSEGV at ParMarkBitMap::verify_clear()
Summary: Replace the broken large pages implementation on Linux. New flag: -XX:+UseTransparentHugePages - Linux specific flag to turn on transparent huge page hinting with madvise(..., MAP_HUGETLB). Changed behavior: -XX:+UseLargePages - tries to use -XX:+UseTransparentHugePages before trying other large pages implementations (on Linux). Changed behavior: -XX:+UseHugeTLBFS - Use upfront allocation of Large Pages instead of using the broken implementation to dynamically committing large pages. Changed behavior: -XX:LargePageSizeInBytes - Turned off the ability to use this flag on Linux and provides warning to user if set to a value different than the OS chosen large page size. Changed behavior: Setting no large page size - Now defaults to use -XX:UseTransparentHugePages if the OS supports it. Previously, -XX:+UseHugeTLBFS was chosen if the OS was configured to use large pages.
Reviewed-by: tschatzl, dcubed, brutisso

duke@435	1	/*
trims@2708	2	* Copyright (c) 1999, 2011, 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	// no precompiled headers
twisti@4318	26	#include "runtime/mutex.hpp"
stefank@2314	27	#include "runtime/osThread.hpp"
duke@435	28
twisti@4318	29	#include <signal.h>
duke@435	30
duke@435	31	void OSThread::pd_initialize() {
duke@435	32	assert(this != NULL, "check");
duke@435	33	_thread_id = 0;
duke@435	34	_pthread_id = 0;
duke@435	35	_siginfo = NULL;
duke@435	36	_ucontext = NULL;
duke@435	37	_expanding_stack = 0;
duke@435	38	_alt_sig_stack = NULL;
duke@435	39
duke@435	40	sigemptyset(&_caller_sigmask);
duke@435	41
duke@435	42	_startThread_lock = new Monitor(Mutex::event, "startThread_lock", true);
duke@435	43	assert(_startThread_lock !=NULL, "check");
duke@435	44	}
duke@435	45
duke@435	46	void OSThread::pd_destroy() {
duke@435	47	delete _startThread_lock;
duke@435	48	}