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    SubjectRe: [ck] Re: [PATCH] [RSDL-0.30] sched: rsdl improve latencies with differential nice -1
    Date
    On Wednesday 14 March 2007 06:54, Al Boldi wrote:
    > Con Kolivas wrote:
    > > On Wednesday 14 March 2007 03:03, Con Kolivas wrote:
    > > > On Wednesday 14 March 2007 02:31, Con Kolivas wrote:
    > > > > On Monday 12 March 2007 22:26, Al Boldi wrote:
    > > > > > I think, it should be possible to spread this max expiration
    > > > > > latency across the rotation, should it not?
    > > > >
    > > > > Can you try the attached patch please Al and Mike? It "dithers" the
    > > > > priority bitmap which tends to fluctuate the latency a lot more but
    > > > > in a cyclical fashion. This tends to make the max latency bound to a
    > > > > smaller value and should make it possible to run -nice tasks without
    > > > > killing the latency of the non niced tasks. Eg you could possibly run
    > > > > X nice -10 at a guess like we used to in 2.4 days. It's not essential
    > > > > of course, but is a workaround for Mike's testcase.
    > > >
    > > > Oops, one tiny fix. This is a respin of the patch, sorry.
    > >
    > > A few other minor things would need to be updated before this patch is in
    > > a good enough shape to join the rsdl patches. This one will be good for
    > > testing though.
    >
    > Applied against v0.30 mainline. It only works on prio +16 to +19.

    I guess the "other minor things" will matter then :) I'll keep working. At
    least you know what I'm working on now.

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