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    SubjectRe: [patch] CFS scheduler, -v19
    Date
    Ingo Molnar wrote:
    > The biggest user-visible change in -v19 is reworked sleeper fairness:
    > it's similar in behavior to -v18 but works more consistently across nice
    > levels. Fork-happy workloads (like kernel builds) should behave better
    > as well. There are also a handful of speedups: unsigned math, 32-bit
    > speedups, O(1) task pickup, debloating and other micro-optimizations.

    Thanks, these changes show an obvious improvement with heavy forklifters.
    But there is one strange artifact; fork response is not consistant over
    successive runs, i.e. sometimes it starves, sometimes it moves, and
    sometimes it flies. It looks like it's dependent on some sched-stats to
    accumulate before it stablizes.

    Also, fork/thread creation is one aspect of testing, but what about thread
    termination performance, which has to sync back to the creating thread? How
    is that handled, and is there some code around that can test this?


    Thanks!

    --
    Al

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