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    SubjectRe: [patch] Re: scheduler oddity [bug?]
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    On Mon, 2009-03-09 at 14:37 +0100, Mike Galbraith wrote:
    > On Mon, 2009-03-09 at 14:16 +0100, Mike Galbraith wrote:
    > > On Mon, 2009-03-09 at 12:04 +0100, Peter Zijlstra wrote:
    > >
    > > > OK, talked a bit with Ingo, the reason you're doing is that avg_overlap
    > > > can easily grow stale.. I can see that happen indeed.
    > > >
    > > > So the 'perfect' thing would be a task-runtime decay, barring that the
    > > > preemption thing seems a sane enough hart-beat of a task.
    > > >
    > > > How does the below look to you?
    > >
    > > Other than the fact that the test for sync reject is currently
    > > avg_overlap > sysctl_sched_migration_cost, looks fine to me. Having it
    > > capped at the boundary is probably the better way to go.
    >
    > Heh, doesn't _quite_ work though. The little bugger now hovers just
    > under :-/

    > se.avg_overlap : 0.499993

    Right, update_avg()'s >>3 and the off-by-one you spotted.

    I recon stuff works better with a 2* added? After that I guess its
    praying sysbench still works.. :-)



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