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    SubjectRe: Context switch times
    On Fri, 5 Oct 2001, Alan Cox wrote:

    > > Let me see if I have this right. Task priority goes to max on any (?)
    > > sleep regardless of how long. And to min if it doesn't sleep for some
    > > period of time. Where does the time slice counter come into this, if at
    > > all?
    > >
    > > For what its worth I am currently updating the MontaVista scheduler so,
    > > I am open to ideas.
    > The time slice counter is the limit on the amount of time you can execute,
    > the priority determines who runs first.
    > So if you used your cpu quota you will get run reluctantly. If you slept
    > you will get run early and as you use time slice count you will drop
    > priority bands, but without pre-emption until you cross a band and there
    > is another task with higher priority.
    > This damps down task thrashing a bit, and for the cpu hogs it gets the
    > desired behaviour - which is that the all run their full quantum in the
    > background one after another instead of thrashing back and forth

    What if we give to prev a priority boost P=F(T) where T is the time
    prev is ran before the current schedule ?

    - Davide

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