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    SubjectRe: [benchmark] 1% performance overhead of paravirt_ops on native kernels

    * Paul Mackerras <paulus@samba.org> wrote:

    > Ingo Molnar writes:
    >
    > > I did this fork overhead measurement some time ago, using
    > > perfcounters and 'perf':
    >
    > Could you post the program? I'd like to try it on some systems
    > here.

    I still have it, it was something really, really simple and silly:

    int main(void)
    {
    int i;

    for (i = 0; i < 8; i++)
    if (!fork())
    wait(0);
    }

    Ingo


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