Re: Question: RT schedular : task_tick_rt(struct rq *rq, struct task_struct *p) : decreases overhead when rq->nr_running == 1

[Ingo Molnar <mingo@elte.hu>]

* Dmitry Adamushko <dmitry.adamushko@gmail.com> wrote:

> I guess, the following thing would do a better job:
> 
> - we do need reschedule() _only_ if there are other task on the _same_ 
> queue (for this prio level) :

ah, indeed.

> --- kernel/sched_rt-prev.c      2007-08-09 09:55:10.000000000 +0200
> +++ kernel/sched_rt.c   2007-08-09 09:58:53.000000000 +0200
> @@ -207,6 +207,11 @@ static void task_tick_rt(struct rq *rq,
>                 return;
> 
>         p->time_slice = static_prio_timeslice(p->static_prio);
> +
> +       /* We are the only element on the queue. */
> +       if (p->run_list.prev == p->run_list.next)
> +               return;
> +

i've applied your patch - could you please send a SOB line?

	Ingo