globals_linux.hpp revision 5422:263f2c796d6c 
1/*
2 * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
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23 */
24
25#ifndef OS_LINUX_VM_GLOBALS_LINUX_HPP
26#define OS_LINUX_VM_GLOBALS_LINUX_HPP
27
28//
29// Defines Linux specific flags. They are not available on other platforms.
30//
31#define RUNTIME_OS_FLAGS(develop, develop_pd, product, product_pd, diagnostic, notproduct) \
32  product(bool, UseOprofile, false,                                     \
33        "enable support for Oprofile profiler")                         \
34                                                                        \
35  product(bool, UseLinuxPosixThreadCPUClocks, true,                     \
36          "enable fast Linux Posix clocks where available")             \
37/*  NB: The default value of UseLinuxPosixThreadCPUClocks may be        \
38    overridden in Arguments::parse_each_vm_init_arg.  */                \
39                                                                        \
40  product(bool, UseHugeTLBFS, false,                                    \
41          "Use MAP_HUGETLB for large pages")                            \
42                                                                        \
43  product(bool, UseTransparentHugePages, false,                         \
44          "Use MADV_HUGEPAGE for large pages")                          \
45                                                                        \
46  product(bool, LoadExecStackDllInVMThread, true,                       \
47          "Load DLLs with executable-stack attribute in the VM Thread") \
48                                                                        \
49  product(bool, UseSHM, false,                                          \
50          "Use SYSV shared memory for large pages")
51
52//
53// Defines Linux-specific default values. The flags are available on all
54// platforms, but they may have different default values on other platforms.
55//
56define_pd_global(bool, UseLargePages, false);
57define_pd_global(bool, UseLargePagesIndividualAllocation, false);
58define_pd_global(bool, UseOSErrorReporting, false);
59define_pd_global(bool, UseThreadPriorities, true) ;
60
61#endif // OS_LINUX_VM_GLOBALS_LINUX_HPP
62