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    SubjectRe: [PATCH] dst_entry structure use,lastuse and refcnt abstraction
    From: Christoph Lameter <>
    Date: Thu, 23 Jun 2005 23:03:45 -0700 (PDT)

    > Ok. Then we are done. With 58 Itanium processors and 200G Ram I get
    > more than 10% improvement ;-). With 500 tasks we have 453 vs. 499 j/m/t.
    > That is 9.21%. For 300 tasks we have 9.4% etc. I am sure that I can push
    > this some more with bigger counts of processors and also some other NUMA
    > related performance issues.

    So it took 7 times more processors to increase the performance gain by
    just over 3 on a microscopic synthetic benchmark. That's not
    impressive at all.

    And you still haven't shown what happens for the workloads I
    suggested. A web benchmark, with say a thousand unique clients, would
    be sufficient for one of those btw. That case has very low dst
    locality, yet dsts are useful because you'll have about 2 or 3
    concurrent connections per dst.
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