annotate src/os/linux/vm/globals_linux.hpp @ 1701:3d90023429ec

6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows Reviewed-by: dcubed, dholmes
author aph
date Wed, 28 Jul 2010 17:38:21 +0100
parents c18cbe5936b8
children f95d63e2154a
rev   line source
duke@0 1 /*
trims@1563 2 * Copyright (c) 2005, 2008, 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
duke@0 25 //
duke@0 26 // Defines Linux specific flags. They are not available on other platforms.
duke@0 27 //
duke@0 28 #define RUNTIME_OS_FLAGS(develop, develop_pd, product, product_pd, diagnostic, notproduct) \
duke@0 29 product(bool, UseOprofile, false, \
duke@0 30 "enable support for Oprofile profiler") \
duke@0 31 \
aph@1701 32 product(bool, UseLinuxPosixThreadCPUClocks, true, \
aph@1701 33 "enable fast Linux Posix clocks where available")
aph@1701 34 // NB: The default value of UseLinuxPosixThreadCPUClocks may be
aph@1701 35 // overridden in Arguments::parse_each_vm_init_arg.
duke@0 36
duke@0 37 //
duke@0 38 // Defines Linux-specific default values. The flags are available on all
duke@0 39 // platforms, but they may have different default values on other platforms.
duke@0 40 //
duke@0 41 define_pd_global(bool, UseLargePages, false);
jmasa@392 42 define_pd_global(bool, UseLargePagesIndividualAllocation, false);
duke@0 43 define_pd_global(bool, UseOSErrorReporting, false);
duke@0 44 define_pd_global(bool, UseThreadPriorities, true) ;