Add sample job file for fixed submission rate

Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/examples/fixed-rate-submission.fio b/examples/fixed-rate-submission.fio
new file mode 100644
index 0000000..076a868
--- /dev/null
+++ b/examples/fixed-rate-submission.fio
@@ -0,0 +1,10 @@
+[fixed-rate-submit]
+size=128m
+rw=read
+ioengine=libaio
+iodepth=32
+direct=1
+# by setting the submit mode to offload, we can guarantee a fixed rate of
+# submission regardless of what the device completion rate is.
+io_submit_mode=offload
+rate_iops=1000