Messages in this thread | | | Subject | Re: [PATCH 1/2] Customize sched domain via cpuset | From | Peter Zijlstra <> | Date | Tue, 01 Apr 2008 13:56:08 +0200 |
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On Tue, 2008-04-01 at 13:40 +0200, Andi Kleen wrote: > Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> writes: > > > Using cpuset, now we can partition the system into multiple sched domains. > > Then, how about providing different characteristics for each domains? > > Did you actually see much improvement in any relevant workload > from tweaking these parameters? If yes what did you change? > And how much did it gain? > > Ideally the kernel should perform well without much tweaking > out of the box, simply because most users won't tweak. Adding a > lot of such parameters would imply giving up on good defaults which > is not a good thing.
>From what I understand they need very aggressive idle balancing; much more so than what is normally healty.
I can see how something like that can be useful when you have a lot of very short running tasks. These could pile up on a few cpus and leave others idle.
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