Re: [RFC 9/12][PATCH] SCHED_DEADLINE: system wide bandwidthmanagement

From: Raistlin
Date: Wed Jan 13 2010 - 04:41:31 EST

On Mon, 2009-12-28 at 15:44 +0100, Peter Zijlstra wrote:
> > Default value is _zero_ bandwidth available, thus write some numbers in those
> > files before trying to start some SCHED_DEADLINE task. Setting runtime > period
> > is allowed (i.e., more than 100% bandwidth available for -deadline tasks),
> > since it makes more than sense in SMP systems.
> Right, so the current rt bandwidth controls go up to 100%, where 100% is
> root_domain wide. That is, the bandwidth usage scale is irrespective of
> the number of cpus.
Yep, I know. Mine controls were working a little bit different because
of the fact I have bandwidth control at the task group --not rq-- level.

> If that was the best choice could of course be argued, but since we have
> that, it would be strange to add another set of controls which do not
> conform.
... I again agree that consistency come first, and I'll move the
controls in the right place, and convert them to the conforming

Thanks and regards,

<<This happens because I choose it to happen!>> (Raistlin Majere)
Dario Faggioli, ReTiS Lab, Scuola Superiore Sant'Anna, Pisa (Italy) / raistlin@xxxxxxxxx /

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