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SubjectRe: question on sched-rt group allocation cap: sched_rt_runtime_us
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On Sun, 2009-09-06 at 08:32 +0200, Mike Galbraith wrote:
> On Sat, 2009-09-05 at 19:32 -0700, Ani wrote:
> > On Sep 5, 3:50 pm, Lucas De Marchi <lucas.de.mar...@gmail.com> wrote:
> > >
> > > Indeed. I've tested this same test program in a single core machine and it
> > > produces the expected behavior:
> > >
> > > rt_runtime_us / rt_period_us % loops executed in SCHED_OTHER
> > > 95% 4.48%
> > > 60% 54.84%
> > > 50% 86.03%
> > > 40% OTHER completed first
> > >
> >
> > Hmm. This does seem to indicate that there is some kind of
> > relationship with SMP. So I wonder whether there is a way to turn this
> > 'RT bandwidth accumulation' heuristic off.
>
> No there isn't..

Actually there is, use cpusets to carve the system into partitions.



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