Messages in this thread | | | From | Con Kolivas <> | Subject | Re: [ck] Re: [PATCH] [RSDL-0.30] sched: rsdl improve latencies with differential nice -1 | Date | Wed, 14 Mar 2007 07:27:37 +1100 |
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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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