Re: CFS Scheduler and real-time tasks

[Ingo Molnar]

* Török Edvin <edwintorok@xxxxxxxxx> wrote:

> Is there something I am doing wrong, or is the precision decrease 
> expected, when running real-time tasks too?

yeah: real-time tasks are ueber-tasks that just get all CPU time 
immediately. I guess we could make SCHED_RR be covered by CFS accounting 
eventually.

> Very precise indeed, the default scheduler produces lots of different 
> timings there.

note: you ran it on a dual-core system and the SMP load-balancer needs 
time to gain precision in the non-RT test - so i'd suggest to test it 
much longer than 10 seconds: 300 seconds at least.

	Ingo
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