goptions: remember to mark option index for FIO_OPT_STR_VAL

[fio.git] / fio.1

diff --git a/fio.1 b/fio.1
index 910812fb5bef351bc8a8ca5d557aacb3bf2e0a8f..938038e4f0a0a61a98a7423ce5c6f175a302eb9f 100644 (file)
--- a/fio.1
+++ b/fio.1
@@ -359,6 +359,20 @@ contents to defeat normal de-dupe attempts. This is not enough to defeat
 more clever block compression attempts, but it will stop naive dedupe
 of blocks. Default: true.
 .TP
+.BI buffer_compress_percentage \fR=\fPint
+If this is set, then fio will attempt to provide IO buffer content (on WRITEs)
+that compress to the specified level. Fio does this by providing a mix of
+random data and zeroes. Note that this is per block size unit, for file/disk
+wide compression level that matches this setting, you'll also want to set
+\fBrefill_buffers\fR.
+.TP
+.BI buffer_compress_chunk \fR=\fPint
+See \fBbuffer_compress_percentage\fR. This setting allows fio to manage how
+big the ranges of random data and zeroed data is. Without this set, fio will
+provide \fBbuffer_compress_percentage\fR of blocksize random data, followed by
+the remaining zeroed. With this set to some chunk size smaller than the block
+size, fio can alternate random and zeroed data throughout the IO buffer.
+.TP
 .BI nrfiles \fR=\fPint
 Number of files to use for this job.  Default: 1.
 .TP
@@ -495,6 +509,13 @@ Default: true.
 .BI offset \fR=\fPint
 Offset in the file to start I/O. Data before the offset will not be touched.
 .TP
+.BI offset_increment \fR=\fPint
+If this is provided, then the real offset becomes the
+offset + offset_increment * thread_number, where the thread number is a counter
+that starts at 0 and is incremented for each job. This option is useful if
+there are several jobs which are intended to operate on a file in parallel in
+disjoint segments, with even spacing between the starting points.
+.TP
 .BI fsync \fR=\fPint
 How many I/Os to perform before issuing an \fBfsync\fR\|(2) of dirty data.  If
 0, don't sync.  Default: 0.
@@ -994,6 +1015,12 @@ Some parameters are only valid when a specific ioengine is in use. These are
 used identically to normal parameters, with the caveat that when used on the
 command line, the must come after the ioengine that defines them is selected.
 .TP
+.BI (cpu)cpuload \fR=\fPint
+Attempt to use the specified percentage of CPU cycles.
+.TP
+.BI (cpu)cpuchunks \fR=\fPint
+Split the load into cycles of the given time. In microseconds.
+.TP
 .BI (libaio)userspace_reap
 Normally, with the libaio engine in use, fio will use
 the io_getevents system call to reap newly returned events.