HOWTO: make it clear that deviation is standard deviation

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

diff --git a/HOWTO b/HOWTO
index 61ebe5e9f7de732403dfd85b59837f01f987ddac..b823eaed24a5b84b30bbf2d19ab5f4ef9f089ae0 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -1956,18 +1956,18 @@ Split up, the format is as follows:
        terse version, fio version, jobname, groupid, error
        READ status:
                Total IO (KB), bandwidth (KB/sec), IOPS, runtime (msec)
-               Submission latency: min, max, mean, deviation (usec)
-               Completion latency: min, max, mean, deviation (usec)
+               Submission latency: min, max, mean, stdev (usec)
+               Completion latency: min, max, mean, stdev (usec)
                Completion latency percentiles: 20 fields (see below)
-               Total latency: min, max, mean, deviation (usec)
-               Bw (KB/s): min, max, aggregate percentage of total, mean, deviation
+               Total latency: min, max, mean, stdev (usec)
+               Bw (KB/s): min, max, aggregate percentage of total, mean, stdev
        WRITE status:
                Total IO (KB), bandwidth (KB/sec), IOPS, runtime (msec)
-               Submission latency: min, max, mean, deviation (usec)
-               Completion latency: min, max, mean, deviation (usec)
+               Submission latency: min, max, mean, stdev (usec)
+               Completion latency: min, max, mean, stdev(usec)
                Completion latency percentiles: 20 fields (see below)
-               Total latency: min, max, mean, deviation (usec)
-               Bw (KB/s): min, max, aggregate percentage of total, mean, deviation
+               Total latency: min, max, mean, stdev (usec)
+               Bw (KB/s): min, max, aggregate percentage of total, mean, stdev
        CPU usage: user, system, context switches, major faults, minor faults
        IO depths: <=1, 2, 4, 8, 16, 32, >=64
        IO latencies microseconds: <=2, 4, 10, 20, 50, 100, 250, 500, 750, 1000