Messages in this thread | | | Date | Tue, 08 Sep 2009 13:13:34 +0300 | From | Nikos Chantziaras <> | Subject | Re: BFS vs. mainline scheduler benchmarks and measurements |
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On 09/08/2009 11:38 AM, Arjan van de Ven wrote: > On Tue, 08 Sep 2009 10:19:06 +0300 > Nikos Chantziaras<realnc@arcor.de> wrote: > >> latencytop has this to say: >> >> http://foss.math.aegean.gr/~realnc/pics/latop1.png >> >> Though I don't really understand what this tool is trying to tell me, >> I hope someone does. > > despite the untranslated content, it is clear that you have scheduler > delays (either due to scheduler bugs or cpu contention) of upto 68 > msecs... Second in line is your binary AMD graphics driver that is > chewing up 14% of your total latency...
I've now used a correctly installed and up-to-date version of latencytop and repeated the test. Also, I got rid of AMD's binary blob and used kernel DRM drivers for my graphics card to throw fglrx out of the equation (which btw didn't help; the exact same problems occur).
Here the result:
http://foss.math.aegean.gr/~realnc/pics/latop2.png
Again: this is on an Intel Core 2 Duo CPU.
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