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    SubjectRe: Useful fork info? WAS Re: [BENCHMARK] fork_load module tested for contest

    On Thu, 26 Sep 2002, Con Kolivas wrote:

    > fork_load:
    > Kernel Time CPU Ratio
    > 2.4.19 97.11 67% 1.33
    > 2.4.19-ck7 72.34 92% 0.99
    > 2.5.38 75.32 92% 1.03
    > 2.5.38-mm2 74.99 92% 1.03
    >
    > 2.4.19: Children forked: 32750
    > 2.4.19-ck7: Children forked: 6477
    > 2.5.38: Children forked: 5545
    > 2.5.38-mm2: Children forked: 5351
    >
    > You can see clearly repeatedly forking a new process significantly slows
    > down compile time for 2.4.19 but not the O(1) based kernels. However,
    > the number of processes that are forked is significantly reduced.

    shouldnt the CPU load be 100% for such a test? If it isnt then perhaps
    some other thing factors in. VM load? And i dont understand how a faster
    kernel forks less children in the end. Perhaps the test is hitting some
    sort of resource limit which has a different default in 2.5?

    Ingo

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