Add support for blkio cgroups on Linux

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 9b3a6848e11c1a43867cd5da6a666ecff12df444..7a7d14ea0816080d794d25f4d899603e2eee57a8 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -994,6 +994,7 @@ gtod_cpu=int        Sometimes it's cheaper to dedicate a single thread of
                for doing these time calls will be excluded from other
                uses. Fio will manually clear it from the CPU mask of other
                jobs.
                for doing these time calls will be excluded from other
                uses. Fio will manually clear it from the CPU mask of other
                jobs.

+

 continue_on_error=bool Normally fio will exit the job on the first observed
                failure. If this option is set, fio will continue the job when
                there is a 'non-fatal error' (EIO or EILSEQ) until the runtime
 continue_on_error=bool Normally fio will exit the job on the first observed
                failure. If this option is set, fio will continue the job when
                there is a 'non-fatal error' (EIO or EILSEQ) until the runtime


@@ -1003,6 +1004,21 @@ continue_on_error=bool   Normally fio will exit the job on the first observed
                given in the stats is the first error that was hit during the
                run.
 
                given in the stats is the first error that was hit during the
                run.
 

+cgroup_root=str        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.
+
+cgroup=str     Add job to this control group. If it doesn't exist, it will
+               be created.
+
+cgroup_weight=int      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.

 
 6.0 Interpreting the output
 ---------------------------
 
 6.0 Interpreting the output
 ---------------------------