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    SubjectRE: [PATCH] Minor scheduler fix to get rid of skipping in xmms
    >The rationale behind Ingo's patch is to "break up" the timeslices to give
    better scheduling latency to
    >multiple tasks at the same priority.
    >So it is not "unnecessary context switches," just "extra context switches." reasoning is that those switches are unnecessary because the
    interactivity bonus/penalty will take care of breaking the timeslices up in
    case of a CPU hog, albeit not at precise 25 ms granularity. Though having
    regularity in scheduling is nice, I think Ingo's patch somewhat negates the
    purpose of having heterogenous time slice lengths. I suspect Ingo's
    approach will thrash the caches quite a bit more than mine; we should
    definitely test this a bit to find out for sure. Any suggestions on how to
    go about that?

    If we're going to do a context switch every 25 ms no matter what, we might
    as well just make the scheduler a true real time scheduler, dump having
    different time slice lengths and interactivity recalculations, and go
    completely round robin with strictly enforced priorities and a single class
    of time slice somewhere 1 to 5 ms long.

    John Yau
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      Last update: 2005-03-22 13:48    [W:0.022 / U:5.380 seconds]
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