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    SubjectRe: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race with preemptible kernel and CPU hotplug
    Jeremy Fitzhardinge wrote:
    >
    >> Xeon 2.0GHz
    >>
    >>
    >> Summary
    >>
    >> no lock prefix (s) with lock prefix (s) Speedup
    >> make -j1 kernel/ 33.94 +/- 0.07 34.91 +/- 0.27 2.8 %
    >> hackbench 50 2.99 +/- 0.01 3.74 +/- 0.01 25.1 %
    >>
    >
    > Yeah, that's more severe than I would have expected. Perhaps I have AMD
    > numbers in my head.
    >

    He doesn't specify what kind of Xeon it is (there are three completely
    different CPUs under the Xeon brand name: P3 Xeon, P4 Xeon, and Core 2
    Xeon), but I think it's a P4 Xeon.

    Netburst sucked in so many ways, and this is one of them.

    -hpa




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