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    SubjectRe: TCP_STREAM performance regression on commit b3613118
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    Le vendredi 17 février 2012 à 16:18 +0800, Alex,Shi a écrit :
    > The tcp_stream loop back performance has about 10% drop on the
    > commitment on our core2 2 sockets server. This commit has 2
    > parents(7505afe28, 5983fe), but both of them have no regression. So
    > guess the impact just happened when this 2 parents joint. That beyond
    > our capability to dig it more.
    >
    > Any ideas?

    Most probably the more accurate truesize determination is responsible of
    this tcp regression, since some prior assumptions might be wrong.

    Want to give more information on the workload ?
    Is it a 32 or 64 bit kernel ?

    cat /proc/sys/net/ipv4/tcp_rmem
    cat /proc/sys/net/ipv4/tcp_wmem
    netstat -s


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