X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=fio.1;h=60f787a140940f9ad5888c84fd96cf8e60f456ff;hp=648b4e9c6d73fb3c040aed3167e8d925a98e1e17;hb=e58eb86d6ce20f7a550dfd28b6c789db5adab95b;hpb=a696fa2a9c2e21a1c88813235d6fc39d267f6155 diff --git a/fio.1 b/fio.1 index 648b4e9c..60f787a1 100644 --- a/fio.1 +++ b/fio.1 @@ -182,6 +182,11 @@ reasons. Allow values are 1024 or 1000, with 1024 being the default. Seed the random number generator in a predictable way so results are repeatable across runs. Default: true. .TP +.BI fallocate \fR=\fPbool +By default, fio will use fallocate() to advise the system of the size of the +file we are going to write. This can be turned off with fallocate=0. May not +be available on all supported platforms. +.TP .BI fadvise_hint \fR=\fPbool Disable use of \fIposix_fadvise\fR\|(2) to advise the kernel what I/O patterns are likely to be issued. Default: true. @@ -725,22 +730,23 @@ entering the kernel with a gettimeofday() call. The CPU set aside for doing these time calls will be excluded from other uses. Fio will manually clear it from the CPU mask of other jobs. .TP -.BI cgroup_root \fR=\fPstr -Root of the mounted blkio cgroup file systems. This is a Linux -specific IO controller. If your system doesn't have it mounted, -you can do so with: - -# mount -t cgroup -o blkio none /cgroup - -The cgroup_root defaults to /cgroup, if mounted elsewhere please specify this -option. -.TP .BI cgroup \fR=\fPstr Add job to this control group. If it doesn't exist, it will be created. +The system must have a mounted cgroup blkio mount point for this to work. If +your system doesn't have it mounted, you can do so with: + +# mount -t cgroup -o blkio none /cgroup .TP .BI cgroup_weight \fR=\fPint Set the weight of the cgroup to this value. See the documentation that comes with the kernel, allowed values are in the range of 100..1000. +.TP +.BI uid \fR=\fPint +Instead of running as the invoking user, set the user ID to this value before +the thread/process does any work. +.TP +.BI gid \fR=\fPint +Set group ID, see \fBuid\fR. .SH OUTPUT While running, \fBfio\fR will display the status of the created jobs. For example: