Add support for write_iops_log

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/fio.1 b/fio.1
index dc10b40..0baa429 100644
--- a/fio.1
+++ b/fio.1
@@ -673,6 +673,10 @@
 Average bandwidth calculations over the given time in milliseconds.  Default:
 500ms.
 .TP
+.BI iopsavgtime \fR=\fPint
+Average IOPS calculations over the given time in milliseconds.  Default:
+500ms.
+.TP
 .BI create_serialize \fR=\fPbool
 If true, serialize file creation for the jobs.  Default: true.
 .TP
@@ -845,6 +849,11 @@
 filename is given with this 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 write_iops_log \fR=\fPstr
+Same as \fBwrite_bw_log\fR, but writes IOPS. If no filename is given with this
+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 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