diff options
Diffstat (limited to 'src/tools/fsync')
| -rw-r--r-- | src/tools/fsync/test_fsync.c | 78 |
1 files changed, 1 insertions, 77 deletions
diff --git a/src/tools/fsync/test_fsync.c b/src/tools/fsync/test_fsync.c index 637d1a6bc16..2179ac937e5 100644 --- a/src/tools/fsync/test_fsync.c +++ b/src/tools/fsync/test_fsync.c @@ -7,6 +7,7 @@ #include "access/xlog_internal.h" #include "access/xlog.h" +#include "access/xlogdefs.h" #include <sys/types.h> #include <sys/stat.h> @@ -18,83 +19,6 @@ #include <unistd.h> #include <string.h> -/* --------------------------------------------------------------- - * Copied from xlog.c. Some day this should be moved an include file. - */ - -/* - * Because O_DIRECT bypasses the kernel buffers, and because we never - * read those buffers except during crash recovery, it is a win to use - * it in all cases where we sync on each write(). We could allow O_DIRECT - * with fsync(), but because skipping the kernel buffer forces writes out - * quickly, it seems best just to use it for O_SYNC. It is hard to imagine - * how fsync() could be a win for O_DIRECT compared to O_SYNC and O_DIRECT. - * Also, O_DIRECT is never enough to force data to the drives, it merely - * tries to bypass the kernel cache, so we still need O_SYNC or fsync(). - */ -#ifdef O_DIRECT -#define PG_O_DIRECT O_DIRECT -#else -#define PG_O_DIRECT 0 -#endif - -/* - * This chunk of hackery attempts to determine which file sync methods - * are available on the current platform, and to choose an appropriate - * default method. We assume that fsync() is always available, and that - * configure determined whether fdatasync() is. - */ -#if defined(O_SYNC) -#define BARE_OPEN_SYNC_FLAG O_SYNC -#elif defined(O_FSYNC) -#define BARE_OPEN_SYNC_FLAG O_FSYNC -#endif -#ifdef BARE_OPEN_SYNC_FLAG -#define OPEN_SYNC_FLAG (BARE_OPEN_SYNC_FLAG | PG_O_DIRECT) -#endif - -#if defined(O_DSYNC) -#if defined(OPEN_SYNC_FLAG) -/* O_DSYNC is distinct? */ -#if O_DSYNC != BARE_OPEN_SYNC_FLAG -#define OPEN_DATASYNC_FLAG (O_DSYNC | PG_O_DIRECT) -#endif -#else /* !defined(OPEN_SYNC_FLAG) */ -/* Win32 only has O_DSYNC */ -#define OPEN_DATASYNC_FLAG (O_DSYNC | PG_O_DIRECT) -#endif -#endif - -#if defined(OPEN_DATASYNC_FLAG) -#define DEFAULT_SYNC_METHOD_STR "open_datasync" -#define DEFAULT_SYNC_METHOD SYNC_METHOD_OPEN -#define DEFAULT_SYNC_FLAGBIT OPEN_DATASYNC_FLAG -#elif defined(HAVE_FDATASYNC) -#define DEFAULT_SYNC_METHOD_STR "fdatasync" -#define DEFAULT_SYNC_METHOD SYNC_METHOD_FDATASYNC -#define DEFAULT_SYNC_FLAGBIT 0 -#elif defined(HAVE_FSYNC_WRITETHROUGH_ONLY) -#define DEFAULT_SYNC_METHOD_STR "fsync_writethrough" -#define DEFAULT_SYNC_METHOD SYNC_METHOD_FSYNC_WRITETHROUGH -#define DEFAULT_SYNC_FLAGBIT 0 -#else -#define DEFAULT_SYNC_METHOD_STR "fsync" -#define DEFAULT_SYNC_METHOD SYNC_METHOD_FSYNC -#define DEFAULT_SYNC_FLAGBIT 0 -#endif - - -/* - * Limitation of buffer-alignment for direct IO depends on OS and filesystem, - * but XLOG_BLCKSZ is assumed to be enough for it. - */ -#ifdef O_DIRECT -#define ALIGNOF_XLOG_BUFFER XLOG_BLCKSZ -#else -#define ALIGNOF_XLOG_BUFFER ALIGNOF_BUFFER -#endif - -/* ------------ from xlog.c --------------- */ #ifdef WIN32 #define FSYNC_FILENAME "./test_fsync.out" |