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    SubjectRe: BFS vs. mainline scheduler benchmarks and measurements
    On 09/08/2009 02:32 PM, Juergen Beisert wrote:
    > On Dienstag, 8. September 2009, Nikos Chantziaras wrote:
    >> 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.
    >
    > Just an idea: Maybe some system management code hits you?

    I'm not sure what is meant with "system management code."


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