Add pre_read to man page

[fio.git] / fio.1

diff --git a/fio.1 b/fio.1
index 38341b3191448f67f81adc23c589542b8fd75aee..a897d27981a9b1de289121cd0ac58f48ada276ca 100644 (file)
--- a/fio.1
+++ b/fio.1
@@ -187,15 +187,18 @@ block sizes for exact control of the issued IO for a job that has mixed
 block sizes. The format of the option is bssplit=blocksize/percentage,
 optionally adding as many definitions as needed seperated by a colon.
 Example: bssplit=4k/10:64k/50:32k/40 would issue 50% 64k blocks, 10% 4k
-blocks and 40% 32k blocks.
+blocks and 40% 32k blocks. \fBbssplit\fR also supports giving separate
+splits to reads and writes. The format is identical to what the
+\fBbs\fR option accepts, the read and write parts are separated with a
+comma.
 .TP
 .B blocksize_unaligned\fR,\fP bs_unaligned
 If set, any size in \fBblocksize_range\fR may be used.  This typically won't
 work with direct I/O, as that normally requires sector alignment.
 .TP
 .BI blockalign \fR=\fPint[,int] "\fR,\fB ba" \fR=\fPint[,int]
-At what boundary to align random IO offsets. Defaults to the same as
-'blocksize' the minimum blocksize given.  Minimum alignment is typically 512b
+At what boundary to align random IO offsets. Defaults to the same as 'blocksize'
+the minimum blocksize given.  Minimum alignment is typically 512b
 for using direct IO, though it usually depends on the hardware block size.
 This option is mutually exclusive with using a random map for files, so it
 will turn off that option.
@@ -470,6 +473,11 @@ If true, serialize file creation for the jobs.  Default: true.
 .BI create_on_open \fR=\fPbool
 If true, the files are not created until they are opened for IO by the job.
 .TP
+.BI pre_read \fR=\fPbool
+If this is given, files will be pre-read into memory before starting the given
+IO operation. This will also clear the \fR \fBinvalidate\fR flag, since it is
+pointless to pre-read and then drop the cache.
+.TP
 .BI unlink \fR=\fPbool
 Unlink job files when done.  Default: false.
 .TP
@@ -831,7 +839,7 @@ was written by Jens Axboe <jens.axboe@oracle.com>.
 This man page was written by Aaron Carroll <aaronc@cse.unsw.edu.au> based
 on documentation by Jens Axboe.
 .SH "REPORTING BUGS"
-Report bugs to the \fBfio\fR mailing list <fio-devel@kernel.dk>.
+Report bugs to the \fBfio\fR mailing list <fio@vger.kernel.org>.
 See \fBREADME\fR.
 .SH "SEE ALSO"
 For further documentation see \fBHOWTO\fR and \fBREADME\fR.