lkml.org 
[lkml]   [2009]   [Sep]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: question on sched-rt group allocation cap: sched_rt_runtime_us
    From
    Date
    On Mon, 2009-09-07 at 09:59 +0200, Peter Zijlstra wrote:
    > 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.

    Yeah, I stand corrected. I tend to think in terms of the dirt simplest
    configuration only.

    -Mike



    \
     
     \ /
      Last update: 2009-09-07 10:27    [W:0.046 / U:120.700 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site