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    SubjectRe: [RFC][PATCH] Multimedia scheduling class, take 2
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    On Tue, 2009-05-12 at 13:07 +0300, Jussi Laako wrote:
    > Peter Zijlstra wrote:
    > > I certainly don't think the current situation is bad enough to warrant
    > > things like that, media on my machines works peachy (*cheer* for XV on
    > > R600).
    >
    > By the way, here's a good test case for a desktop, preferably UP:
    > - run something like this in a loop:
    > find / -type f -exec grep asd "{}" ";"
    > - run x11perf * numcpus in a loop
    > - run glxgears * numcpus
    > - go to youtube frontpage with a web browser
    > - start for example "totem" mediaplayer and play full-HD H.264 movie
    >
    > Does the movie playback and audio go smoothly? Can you play youtube HD
    > videos smoothly?

    I don't know about youtube, that flash thing doesn't seem to deliver
    full hd content, and I'm not sure where to click, but playing a full-hd
    trailer from the network using vlc seems to work just fine with 4
    x11perf and 4 glxgears and that find thing.

    There is an occasional stutter, but not much.

    Thing is, adding static preemption priories into SCHED_OTHER (which is
    basically what you propose I think) doesn't really help, I can still
    load the machine high enough so that there simply isn't time available
    to decode the frames while maintaining proportional fairness -- no
    matter how preemptive you get.




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