Re: [PATCH] default to n for GROUP_SCHED and FAIR_GROUP_SCHED

Parag Warudkar
2008-05-05T21:41:20Z

On Mon, May 5, 2008 at 5:05 PM, Ingo Molnar <mingo@elte.hu> wrote:
>

> This is now believed to be fixed in sched-devel.git, via the "single
> runqueue" and deadline-scheduling patches from Peter that flattens the
> hierarchy of the group scheduler.
>
> Another latency source was the skew of sched_clock() running too slow -
> that way if the clock runs at 10% of its intended speed the scheduler
> will turn a 40msec intended latency target into a 400 msec latency
> target!
>
> This bug too is now believed to be fixed via Peter's new sched_clock
> code in sched-devel.git.

Ok, but the latency problems are not fixed with sched-devel as of
today. I still get unusable audio if I enable GROUP_SCHED stuff on
sched-devel and run make -j8 .

Parag