diff options
Diffstat (limited to 'dep/mysqllite/mysys/my_largepage.c')
| -rw-r--r-- | dep/mysqllite/mysys/my_largepage.c | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/dep/mysqllite/mysys/my_largepage.c b/dep/mysqllite/mysys/my_largepage.c deleted file mode 100644 index 9f5ab01a2b7..00000000000 --- a/dep/mysqllite/mysys/my_largepage.c +++ /dev/null @@ -1,166 +0,0 @@ -/* Copyright (C) 2004 MySQL AB, 2008-2009 Sun Microsystems, Inc - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; version 2 of the License. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ - -#include "mysys_priv.h" - -#ifdef HAVE_LARGE_PAGES - -#ifdef HAVE_SYS_IPC_H -#include <sys/ipc.h> -#endif - -#ifdef HAVE_SYS_SHM_H -#include <sys/shm.h> -#endif - -static uint my_get_large_page_size_int(void); -static uchar* my_large_malloc_int(size_t size, myf my_flags); -static my_bool my_large_free_int(uchar* ptr); - -/* Gets the size of large pages from the OS */ - -uint my_get_large_page_size(void) -{ - uint size; - DBUG_ENTER("my_get_large_page_size"); - - if (!(size = my_get_large_page_size_int())) - fprintf(stderr, "Warning: Failed to determine large page size\n"); - - DBUG_RETURN(size); -} - -/* - General large pages allocator. - Tries to allocate memory from large pages pool and falls back to - my_malloc_lock() in case of failure -*/ - -uchar* my_large_malloc(size_t size, myf my_flags) -{ - uchar* ptr; - DBUG_ENTER("my_large_malloc"); - - if (my_use_large_pages && my_large_page_size) - { - if ((ptr = my_large_malloc_int(size, my_flags)) != NULL) - DBUG_RETURN(ptr); - if (my_flags & MY_WME) - fprintf(stderr, "Warning: Using conventional memory pool\n"); - } - - DBUG_RETURN(my_malloc_lock(size, my_flags)); -} - -/* - General large pages deallocator. - Tries to deallocate memory as if it was from large pages pool and falls back - to my_free_lock() in case of failure - */ - -void my_large_free(uchar* ptr) -{ - DBUG_ENTER("my_large_free"); - - /* - my_large_free_int() can only fail if ptr was not allocated with - my_large_malloc_int(), i.e. my_malloc_lock() was used so we should free it - with my_free_lock() - */ - if (!my_use_large_pages || !my_large_page_size || !my_large_free_int(ptr)) - my_free_lock(ptr); - - DBUG_VOID_RETURN; -} - -#ifdef HUGETLB_USE_PROC_MEMINFO -/* Linux-specific function to determine the size of large pages */ - -uint my_get_large_page_size_int(void) -{ - MYSQL_FILE *f; - uint size = 0; - char buf[256]; - DBUG_ENTER("my_get_large_page_size_int"); - - if (!(f= mysql_file_fopen(key_file_proc_meminfo, "/proc/meminfo", - O_RDONLY, MYF(MY_WME)))) - goto finish; - - while (mysql_file_fgets(buf, sizeof(buf), f)) - if (sscanf(buf, "Hugepagesize: %u kB", &size)) - break; - - mysql_file_fclose(f, MYF(MY_WME)); - -finish: - DBUG_RETURN(size * 1024); -} -#endif /* HUGETLB_USE_PROC_MEMINFO */ - -#if HAVE_DECL_SHM_HUGETLB -/* Linux-specific large pages allocator */ - -uchar* my_large_malloc_int(size_t size, myf my_flags) -{ - int shmid; - uchar* ptr; - struct shmid_ds buf; - DBUG_ENTER("my_large_malloc_int"); - - /* Align block size to my_large_page_size */ - size= MY_ALIGN(size, (size_t) my_large_page_size); - - shmid = shmget(IPC_PRIVATE, size, SHM_HUGETLB | SHM_R | SHM_W); - if (shmid < 0) - { - if (my_flags & MY_WME) - fprintf(stderr, - "Warning: Failed to allocate %lu bytes from HugeTLB memory." - " errno %d\n", (ulong) size, errno); - - DBUG_RETURN(NULL); - } - - ptr = (uchar*) shmat(shmid, NULL, 0); - if (ptr == (uchar *) -1) - { - if (my_flags& MY_WME) - fprintf(stderr, "Warning: Failed to attach shared memory segment," - " errno %d\n", errno); - shmctl(shmid, IPC_RMID, &buf); - - DBUG_RETURN(NULL); - } - - /* - Remove the shared memory segment so that it will be automatically freed - after memory is detached or process exits - */ - shmctl(shmid, IPC_RMID, &buf); - - DBUG_RETURN(ptr); -} - -/* Linux-specific large pages deallocator */ - -my_bool my_large_free_int(uchar *ptr) -{ - DBUG_ENTER("my_large_free_int"); - DBUG_RETURN(shmdt(ptr) == 0); -} -#endif /* HAVE_DECL_SHM_HUGETLB */ - -#endif /* HAVE_LARGE_PAGES */ |