Init buflen for our dummy buffer

[fio.git] / fio.1

diff --git a/fio.1 b/fio.1
index d197f7aeb2322800d8ed1bae6d41e4545ffd696b..91020b2eeb89a4b5b3d4da3f9ff7f2aa87f668c0 100644 (file)
--- a/fio.1
+++ b/fio.1
@@ -54,6 +54,12 @@ Convert \fIjobfile\fR to a set of command-line options.
 Specifies when real-time ETA estimate should be printed.  \fIwhen\fR may
 be one of `always', `never' or `auto'.
 .TP
+.BI \-\-eta\-newline \fR=\fPtime
+Force an ETA newline for every `time` period passed.
+.TP
+.BI \-\-status\-interval \fR=\fPtime
+Report full output status every `time` period passed.
+.TP
 .BI \-\-readonly
 Turn on safety read-only checks, preventing any attempted write.
 .TP
@@ -442,6 +448,9 @@ Basic \fIpread\fR\|(2) or \fIpwrite\fR\|(2) I/O.
 Basic \fIreadv\fR\|(2) or \fIwritev\fR\|(2) I/O. Will emulate queuing by
 coalescing adjacents IOs into a single submission.
 .TP
+.B pvsync
+Basic \fIpreadv\fR\|(2) or \fIpwritev\fR\|(2) I/O.
+.TP
 .B libaio
 Linux native asynchronous I/O. This ioengine defines engine specific options.
 .TP
@@ -635,6 +644,15 @@ If you wanted to use zipf with a theta of 1.2, you would use
 random_distribution=zipf:1.2 as the option. If a non-uniform model is used,
 fio will disable use of the random map.
 .TP
+.BI percentage_random \fR=\fPint
+For a random workload, set how big a percentage should be random. This defaults
+to 100%, in which case the workload is fully random. It can be set from
+anywhere from 0 to 100.  Setting it to 0 would make the workload fully
+sequential.
+.TP
+.BI percentage_sequential \fR=\fPint
+See \fBpercentage_random\fR.
+.TP
 .B norandommap
 Normally \fBfio\fR will cover every block of the file when doing random I/O. If
 this parameter is given, a new offset will be chosen without looking at past
@@ -684,7 +702,12 @@ Pretend to spend CPU time for given number of microseconds, sleeping the rest
 of the time specified by \fBthinktime\fR.  Only valid if \fBthinktime\fR is set.
 .TP
 .BI thinktime_blocks \fR=\fPint
-Number of blocks to issue before waiting \fBthinktime\fR microseconds.
+Only valid if thinktime is set - control how many blocks to issue, before
+waiting \fBthinktime\fR microseconds. If not set, defaults to 1 which will
+make fio wait \fBthinktime\fR microseconds after every block. This
+effectively makes any queue depth setting redundant, since no more than 1 IO
+will be queued before we have to complete it and do our thinktime. In other
+words, this setting effectively caps the queue depth if the latter is larger.
 Default: 1.
 .TP
 .BI rate \fR=\fPint
@@ -1170,6 +1193,12 @@ 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.