Add log_avg_msec option
By default, fio will note an entry in the bw/iops/lat logs for every
IO that is completed. This quickly eats up a lot of disk space
for long running jobs. By setting this option to eg 1000, fio will
average the results logged over 1 second instead. This reduces the
resolution of the log, but makes it more manageable.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/fio.1 b/fio.1
index 138208f..aeba39a 100644
--- a/fio.1
+++ b/fio.1
@@ -872,6 +872,13 @@
option, the default filename of "jobname_type.log" is used. Even if the
filename is given, fio will still append the type of log.
.TP
+.BI log_avg_msec \fR=\fPint
+By default, fio will log an entry in the iops, latency, or bw log for every
+IO that completes. When writing to the disk log, that can quickly grow to a
+very large size. Setting this option makes fio average the each log entry
+over the specified period of time, reducing the resolution of the log.
+Defaults to 0.
+.TP
.BI disable_lat \fR=\fPbool
Disable measurements of total latency numbers. Useful only for cutting
back the number of calls to gettimeofday, as that does impact performance at