Add ramp_time option

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 7a65aa1540338c32bc2d43ef5b862b6c68b5b7ab..dd2f84a8f8fd850fa4fc6d088ea2e5675014ee3e 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -574,6 +574,11 @@ time_based If set, fio will run for the duration of the runtime
                written. It will simply loop over the same workload
                as many times as the runtime allows.
 
+ramp_time      If set, fio will run the specified workload for this amount
+               of time before logging any performance numbers. Useful for
+               letting performance settle before logging results, thus
+               minimizing the runtime required for stable results.
+
 invalidate=bool        Invalidate the buffer/page cache parts for this file prior
                to starting io. Defaults to true.