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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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