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    SubjectRe: [patch] fastcall-2.3.32-B6, SYSENTER/SYSEXIT support


    On Sun, 12 Dec 1999, Pavel Machek wrote:
    > >
    > > Who cares how fast you can do "getpid()"? NOBODY. It's meaningless.
    >
    > Well, read from cached file is _not_ meaningless, still Ingo seen
    > improvements on that.

    Not really.

    You see improvements on the order of a percent or two IFF:
    - you do small reads
    - in a tight loop

    Ergo, that benchmark was really not worth it either.

    > I think you should concentrate on read(), write() and select()
    > syscalls. Those are the ones done often.

    I mostly agree, although gettimeofday() under X is actually _the_ most
    common one. But gettimeofday() is special anyway, simply because it
    doesn't actually need to do a kernel entry, so the three you mention are
    certainly "basic".

    Linus


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