linux-kernel - Re: [patch] CFS scheduler, -v11

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Date:	Thu, 10 May 2007 20:51:09 +0200
From:	Christian <christiand59@....de>
To:	linux-kernel@...r.kernel.org
Subject: Re: [patch] CFS scheduler, -v11

On Thursday 10 May 2007 19:10:44 Kasper Sandberg wrote:
> On Thu, 2007-05-10 at 18:59 +0200, Christian wrote:
> > Hello lkml, hello Ingo!
> >
> > I've been using CFS-v10 for a few days and I must say that I'm verry
> > impressed ;-)
> >
> > Desktop performance without any manual renicing is excellent, even with
> > make -j20. Gaming performance is at least on par with SD now! I've tried
> > to
>
> Which games are you trying? and have you tried other workloads then make
> -j20?
>
> try have a window with some 3d game open, and a browser besides it, and
> press a link. i cant seem to get smooth results with CFS.
>
> Perhaps i could also conduct tests with the games you are trying on my
> hardware.
>
> > change the sched_load_smoothing config to "8" but there is no visible
> > difference when it's set to "7".
> >
> > Both schedulers are verrry good! I can't really tell which one is better.
> > I noticed that while compiling a kernel (with -j4) my CPU temperature is
> > two to three degrees hotter than with mainline. I have not done any
> > timing tests, but I suspect that it's a little faster while preserving
> > excellent desktop usability. Great work!! :-)
> >
> > -Christian
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel"
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> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at  http://www.tux.org/lkml/

I've tried many different workloads, kernel compile (normal -j4), extreme 
kernel compile (-j20) and Browsing/Open Office. GLXGears, Briquolo and 
enemy-territory work relly well under these loads.

I just tried another test with "nice make -j20" and I see latency blips while 
gaming. SD did not have this. Latencies with nice are _worse_ than latencies 
without nice on my system. Playing with sched_load_smoothing does not change 
anything. (I've tested values in the range 1-10)

-Christian
-
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