Re: [PATCH 1/3] Added runqueue clock normalized with cpufreq

From: Dario Faggioli
Date: Fri Dec 17 2010 - 13:46:23 EST


On Fri, 2010-12-17 at 16:02 +0100, Harald Gustafsson wrote:
> > Once you have a governor that keeps the freq such that: freq/max_freq >=
> > utilization (which is only sufficient for deadline == period systems),
> > then you need to frob the SCHED_DEADLINE runtime accounting.
>
> I agree that this is the other part of the solution, which I have in a separate
> ondemand governor, but that code is not ready for public review yet. Since that
> code also incorporate other ondemand changes I'm playing with.
>
So, while we're waiting for this to be cooked...

> OK, I can do that. My thought from the beginning was considering that
> the reading of the clock was done more often then updating it, but I agree that
> it has a negative impact on none dl threads.
>
... We can at least integrate this (done in the proper, way as Peter
suggests, i.e., _inside_ SCHED_DEADLINE) in the next release of the
patchset, can't we?

Regards,
Dario

--
<<This happens because I choose it to happen!>> (Raistlin Majere)
----------------------------------------------------------------------
Dario Faggioli, ReTiS Lab, Scuola Superiore Sant'Anna, Pisa (Italy)

http://retis.sssup.it/people/faggioli -- dario.faggioli@xxxxxxxxxx

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