On Fri, Nov 21, 2008 at 05:25:06PM +0530, [EMAIL PROTECTED] wrote:
> This patch adds the code to do the setup for a default group which will be
> spinning a task to create an ideal scenario for group fairness.
>
> Signed-off-by: Sudhir Kumar <[EMAIL PROTECTED]>
>
> Index: ltp-full-20081031/testcases/kernel/controllers/cpuctl/parameters.sh
> ===================================================================
> --- ltp-full-20081031.orig/testcases/kernel/controllers/cpuctl/parameters.sh
> +++ ltp-full-20081031/testcases/kernel/controllers/cpuctl/parameters.sh
> @@ -41,6 +41,24 @@
>
> #################################################################################
>
>
> +set_def_group() #default group spinning a task to create ideal scenario
> +{
> + [ -d /dev/cpuctl/group_def ] || mkdir /dev/cpuctl/group_def;
> + if [ $? -ne 0 ]
> + then
> + echo "ERROR: Can't create default group... "
> + "Check your permissions..Exiting test";
> + cleanup;
> + exit -1;
> + fi
> + # Migrate all the running tasks to this group
> + # rt tasks require a finite value to cpu.rt_runtime_us
> + echo 10000 > /dev/cpuctl/group_def/cpu.rt_runtime_us;
Since you are migrating all rt tasks, and you are not going to start any
RT tasks as part of tests, it is a better idea to give the default group
maximum rt bandwidth.
> + for task in `cat /dev/cpuctl/tasks`; do
> + echo $task > /dev/cpuctl/group_def/tasks 2>/dev/null 1>&2;
> + done
> +}
> +
> get_num_groups() # Number of tasks should be >= number of cpu's (to
> check scheduling fairness)
> {
> num_grps=$(echo "$NUM_CPUS * 1.5"|bc) # temp variable num_grps
>
--
regards,
Dhaval
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