1/*
2 * Copyright (c) 2005, 2016, 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.
22 *
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, \
32                         develop_pd, \
33                         product, \
34                         product_pd, \
35                         diagnostic, \
36                         diagnostic_pd, \
37                         notproduct, \
38                         range, \
39                         constraint, \
40                         writeable) \
41                                                                        \
42  product(bool, UseOprofile, false,                                     \
43        "enable support for Oprofile profiler")                         \
44                                                                        \
45  /*  NB: The default value of UseLinuxPosixThreadCPUClocks may be   */ \
46  /* overridden in Arguments::parse_each_vm_init_arg.                */ \
47  product(bool, UseLinuxPosixThreadCPUClocks, true,                     \
48          "enable fast Linux Posix clocks where available")             \
49                                                                        \
50  product(bool, UseHugeTLBFS, false,                                    \
51          "Use MAP_HUGETLB for large pages")                            \
52                                                                        \
53  product(bool, UseTransparentHugePages, false,                         \
54          "Use MADV_HUGEPAGE for large pages")                          \
55                                                                        \
56  product(bool, LoadExecStackDllInVMThread, true,                       \
57          "Load DLLs with executable-stack attribute in the VM Thread") \
58                                                                        \
59  product(bool, UseSHM, false,                                          \
60          "Use SYSV shared memory for large pages")                     \
61                                                                        \
62  diagnostic(bool, UseCpuAllocPath, false,                              \
63             "Use CPU_ALLOC code path in os::active_processor_count ")
64
65//
66// Defines Linux-specific default values. The flags are available on all
67// platforms, but they may have different default values on other platforms.
68//
69define_pd_global(bool, UseLargePages, false);
70define_pd_global(bool, UseLargePagesIndividualAllocation, false);
71define_pd_global(bool, UseOSErrorReporting, false);
72define_pd_global(bool, UseThreadPriorities, true) ;
73
74#endif // OS_LINUX_VM_GLOBALS_LINUX_HPP
75