jdk8-mips64-public/hotspot: src/os/linux/vm/os

6684395: Port NUMA-aware allocator to linux
Summary: NUMA-aware allocator port to Linux
Reviewed-by: jmasa, apetrusenko

     1 /*

     2  * Copyright 1999-2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    25 inline void* os::thread_local_storage_at(int index) {

    26   return pthread_getspecific((pthread_key_t)index);

    27 }

    29 inline const char* os::file_separator() {

    30   return "/";

    31 }

    33 inline const char* os::line_separator() {

    34   return "\n";

    35 }

    37 inline const char* os::path_separator() {

    38   return ":";

    39 }

    41 inline const char* os::jlong_format_specifier() {

    42   return "%lld";

    43 }

    45 inline const char* os::julong_format_specifier() {

    46   return "%llu";

    47 }

    49 // File names are case-sensitive on windows only

    50 inline int os::file_name_strcmp(const char* s1, const char* s2) {

    51   return strcmp(s1, s2);

    52 }

    54 inline bool os::obsolete_option(const JavaVMOption *option) {

    55   return false;

    56 }

    58 inline bool os::uses_stack_guard_pages() {

    59   return true;

    60 }

    62 inline bool os::allocate_stack_guard_pages() {

    63   assert(uses_stack_guard_pages(), "sanity check");

    64   return true;

    65 }

    68 // On Linux, reservations are made on a page by page basis, nothing to do.

    69 inline void os::split_reserved_memory(char *base, size_t size,

    70                                       size_t split, bool realloc) {

    71 }

    74 // Bang the shadow pages if they need to be touched to be mapped.

    75 inline void os::bang_stack_shadow_pages() {

    76 }

    78 inline DIR* os::opendir(const char* dirname)

    79 {

    80   assert(dirname != NULL, "just checking");

    81   return ::opendir(dirname);

    82 }

    84 inline int os::readdir_buf_size(const char *path)

    85 {

    86   return NAME_MAX + sizeof(dirent) + 1;

    87 }

    89 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf)

    90 {

    91   dirent* p;

    92   int status;

    93   assert(dirp != NULL, "just checking");

    95   // NOTE: Linux readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX

    96   // version. Here is the doc for this function:

    97   // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html

    99   if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {

   100     errno = status;

   101     return NULL;

   102   } else

   103     return p;

   104 }

   106 inline int os::closedir(DIR *dirp)

   107 {

   108   assert(dirp != NULL, "just checking");

   109   return ::closedir(dirp);

   110 }

   112 // macros for restartable system calls

   114 #define RESTARTABLE(_cmd, _result) do { \

   115     _result = _cmd; \

   116   } while(((int)_result == OS_ERR) && (errno == EINTR))

   118 #define RESTARTABLE_RETURN_INT(_cmd) do { \

   119   int _result; \

   120   RESTARTABLE(_cmd, _result); \

   121   return _result; \

   122 } while(false)

   124 inline bool os::numa_has_static_binding()   { return true; }

   125 inline bool os::numa_has_group_homing()     { return false;  }

src/os/linux/vm/os_linux.inline.hpp@fcbfc50865ab