From: Jens Axboe <axboe@fb.com>
Date: Mon, 9 May 2016 19:35:09 +0000 (-0600)
Subject: Change default IO engine from sync to psync
X-Git-Tag: fio-2.10~34
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=df96a39edc86394bca0643e9aa2a8f4dfc76c7c9

Change default IO engine from sync to psync

If the OS doesn't give us a default IO engine, then fio defaults to
sync. We should use psync instead, since we have that everywhere.
For fast storage, it avoids and lseek(), which can be a big deal.

Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/os/os.h b/os/os.h
index 02ab40d3..98773838 100644
--- a/os/os.h
+++ b/os/os.h
@@ -151,7 +151,7 @@ extern int fio_cpus_split(os_cpu_mask_t *mask, unsigned int cpu);
 #endif
 
 #ifndef FIO_PREFERRED_ENGINE
-#define FIO_PREFERRED_ENGINE	"sync"
+#define FIO_PREFERRED_ENGINE	"psync"
 #endif
 
 #ifndef FIO_OS_PATH_SEPARATOR