From: Jens Axboe <jaxboe@fusionio.com>
Date: Wed, 19 Jan 2011 18:09:58 +0000 (-0700)
Subject: Define OS preferred IO engine
X-Git-Tag: fio-1.50-rc4~4
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=58483fa41bb08def4dbd3c4c9624116b643c7599;hp=3be8007107a6e4bad3f1b7ea9ea80b51a2dddfc4

Define OS preferred IO engine

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---

diff --git a/options.c b/options.c
index 67d0d2dd..de2d0370 100644
--- a/options.c
+++ b/options.c
@@ -918,7 +918,7 @@ static struct fio_option options[FIO_MAX_OPTS] = {
 		.type	= FIO_OPT_STR_STORE,
 		.off1	= td_var_offset(ioengine),
 		.help	= "IO engine to use",
-		.def	= "sync",
+		.def	= FIO_PREFERRED_ENGINE,
 		.posval	= {
 			  { .ival = "sync",
 			    .help = "Use read/write",
diff --git a/os/os-windows.h b/os/os-windows.h
index 9edacf33..e790a513 100644
--- a/os/os-windows.h
+++ b/os/os-windows.h
@@ -22,6 +22,8 @@
 
 #define OS_CLOCK CLOCK_REALTIME
 
+#define FIO_PREFERRED_ENGINE	"windowsaio"
+
 typedef off_t off64_t;
 
 typedef struct {
diff --git a/os/os.h b/os/os.h
index 92b6950d..1569e409 100644
--- a/os/os.h
+++ b/os/os.h
@@ -102,6 +102,10 @@ typedef unsigned long os_cpu_mask_t;
 #define fio_lookup_raw(dev, majdev, mindev)	1
 #endif
 
+#ifndef FIO_PREFERRED_ENGINE
+#define FIO_PREFERRED_ENGINE	"sync"
+#endif
+
 #ifndef FIO_HAVE_BLKTRACE
 static inline int is_blktrace(const char *fname)
 {