Re: CFS scheduler OLTP perforamnce

Peter Zijlstra
2008-12-12T14:22:35Z

On Fri, 2008-12-12 at 15:15 +0100, Andi Kleen wrote:
> Peter Zijlstra <peterz@infradead.org> writes:
> >>
> >> It seems that in this case renice to higher priority with CFS did not
> >> reduce scheduling latency as well as SCHED_RR.
> >
> > Is there a question in this email?
>
> The question is how to make nice perform as well as SCHED_RR.

Depending on the circumstances, you can't - SCHED_RR doesn't bother with
fairness.

That is not to say there is no room for improvement, but that really
needs more information.