annotate src/os/linux/vm/globals_linux.hpp @ 2525:139667d9836a

7034464: Support transparent large pages on Linux Summary: Support transparent huge pages on Linux available since 2.6.38 Reviewed-by: iveresov, ysr Contributed-by: aph@redhat.com
author iveresov
date Wed, 20 Apr 2011 17:12:04 -0700
parents f95d63e2154a
children 188c9a5d6a6d
rev   line source
duke@0 1 /*
stefank@1992 2 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
duke@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@0 4 *
duke@0 5 * This code is free software; you can redistribute it and/or modify it
duke@0 6 * under the terms of the GNU General Public License version 2 only, as
duke@0 7 * published by the Free Software Foundation.
duke@0 8 *
duke@0 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@0 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@0 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@0 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@0 13 * accompanied this code).
duke@0 14 *
duke@0 15 * You should have received a copy of the GNU General Public License version
duke@0 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@0 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@0 18 *
trims@1563 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1563 20 * or visit www.oracle.com if you need additional information or have any
trims@1563 21 * questions.
duke@0 22 *
duke@0 23 */
duke@0 24
stefank@1992 25 #ifndef OS_LINUX_VM_GLOBALS_LINUX_HPP
stefank@1992 26 #define OS_LINUX_VM_GLOBALS_LINUX_HPP
stefank@1992 27
duke@0 28 //
duke@0 29 // Defines Linux specific flags. They are not available on other platforms.
duke@0 30 //
duke@0 31 #define RUNTIME_OS_FLAGS(develop, develop_pd, product, product_pd, diagnostic, notproduct) \
iveresov@2525 32 product(bool, UseOprofile, false, \
iveresov@2525 33 "enable support for Oprofile profiler") \
iveresov@2525 34 \
iveresov@2525 35 product(bool, UseLinuxPosixThreadCPUClocks, true, \
iveresov@2525 36 "enable fast Linux Posix clocks where available") \
iveresov@2525 37 /* NB: The default value of UseLinuxPosixThreadCPUClocks may be \
iveresov@2525 38 overridden in Arguments::parse_each_vm_init_arg. */ \
iveresov@2525 39 \
iveresov@2525 40 product(bool, UseHugeTLBFS, false, \
iveresov@2525 41 "Use MAP_HUGETLB for large pages") \
iveresov@2525 42 \
iveresov@2525 43 product(bool, UseSHM, false, \
iveresov@2525 44 "Use SYSV shared memory for large pages")
duke@0 45
duke@0 46 //
duke@0 47 // Defines Linux-specific default values. The flags are available on all
duke@0 48 // platforms, but they may have different default values on other platforms.
duke@0 49 //
duke@0 50 define_pd_global(bool, UseLargePages, false);
jmasa@392 51 define_pd_global(bool, UseLargePagesIndividualAllocation, false);
duke@0 52 define_pd_global(bool, UseOSErrorReporting, false);
duke@0 53 define_pd_global(bool, UseThreadPriorities, true) ;
stefank@1992 54
stefank@1992 55 #endif // OS_LINUX_VM_GLOBALS_LINUX_HPP