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    SubjectRe: [PATCH v2] proc: speedup /proc/stat handling
    Le mardi 24 janvier 2012 à 16:12 -0800, Andrew Morton a écrit :

    > Did you measure the improvement from this patch?

    Unfortunately I can not reboot the server where I noticed this
    performance problem.

    On the smaller one, performance improvement is about 20%, because the
    second run of show_stat() can use data present in cpu cache.

    On big machines, I guess the 128 bytes per possible cpu reservation can
    avoid the second run. (since a typical cpuXXX line is smaller than 128

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