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    SubjectRe: Sched - graphic smoothness under load - cfs-v13 sd-0.48
    Bill Davidsen wrote:
    > I generated a table of results from the latest glitch1 script, using an
    > HTML postprocessor I not *quite* ready to foist on the word. In any case
    > it has some numbers for frames per second, fairness of the processor
    > time allocated to the compute bound processes which generate a lot of
    > other screen activity for X, and my subjective comments on how smooth it
    > looked and felt.
    >
    > The chart is at http://www.tmr.com/~davidsen/sched_smooth_01.html for
    > your viewing pleasure. The only "tuned" result was with sd, since what I
    > observed was so bad using the default settings. If any scheduler
    > developers would like me to try other tunings or new versions let me know.
    >

    As I tryied myself kernels 2.6.21, 2.6.21-cfs-v13, and 2.6.21-ck2 on the
    same machine i found *very* odd those numbers you posted, so i tested
    myself those kernels to see the numbers I get instead of talking about
    the usage of kernel xpto feels like.

    I did run glxgears with kernels 2.6.21, 2.6.21-cfs-v13 and 2.6.21-ck2
    inside Debian's GNOME environment. The hardware is an AMD Sempron64 3.0
    GHz, 1 GB RAM, Nvidia 6800XT.
    Average and standard deviation from the gathered data:

    * 2.6.21: average = 11251.1; stdev = 0.172
    * 2.6.21-cfs-v13: average = 11242.8; stdev = 0.033
    * 2.6.21-ck2: average = 11257.8; stdev = 0.067

    Keep in mind those numbers don't mean anything we all know glxgears is
    not a benchmark, their purpose is only to be used as comparison under
    the same conditions.

    One odd thing i noticed, with 2.6.21-cfs-v13 the gnome's time applet in
    the bar skipped some minutes (e.g. 16:23 -> 16:25) several times.

    The data is available on:
    http://www.debianPT.org/~elmig/pool/kernel/20070520/


    How did you get your data? I am affraid your data it's wrong, there's no
    such big difference between the schedulers...

    --

    Com os melhores cumprimentos/Best regards,

    Miguel Figueiredo
    http://www.DebianPT.org
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