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annotate src/os/linux/vm/globals_linux.hpp @ 1679:3d90023429ec

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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
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1 /*
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2 * Copyright (c) 2005, 2008, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 //
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26 // Defines Linux specific flags. They are not available on other platforms.
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27 //
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28 #define RUNTIME_OS_FLAGS(develop, develop_pd, product, product_pd, diagnostic, notproduct) \
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29 product(bool, UseOprofile, false, \
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30 "enable support for Oprofile profiler") \
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31 \
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32 product(bool, UseLinuxPosixThreadCPUClocks, true, \
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33 "enable fast Linux Posix clocks where available")
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34 // NB: The default value of UseLinuxPosixThreadCPUClocks may be
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35 // overridden in Arguments::parse_each_vm_init_arg.
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36
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37 //
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38 // Defines Linux-specific default values. The flags are available on all
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39 // platforms, but they may have different default values on other platforms.
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40 //
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41 define_pd_global(bool, UseLargePages, false);
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42 define_pd_global(bool, UseLargePagesIndividualAllocation, false);
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43 define_pd_global(bool, UseOSErrorReporting, false);
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44 define_pd_global(bool, UseThreadPriorities, true) ;