Define OS preferred IO engine
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/options.c b/options.c
index 67d0d2d..de2d037 100644
--- a/options.c
+++ b/options.c
@@ -918,7 +918,7 @@
.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 9edacf3..e790a51 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 92b6950..1569e40 100644
--- a/os/os.h
+++ b/os/os.h
@@ -102,6 +102,10 @@
#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)
{