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Message-Id: <200703140308.40038.kernel@kolivas.org> Date: Wed, 14 Mar 2007 03:08:39 +1100 From: Con Kolivas <kernel@...ivas.org> To: ck@....kolivas.org Cc: Al Boldi <a1426z@...ab.com>, Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org Subject: Re: [PATCH] [RSDL-0.30] sched: rsdl improve latencies with differential nice -1 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. -- -ck - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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