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    SubjectRe: [PATCH v2 14/14] Change CPUACCT to default n
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    On Mon, 2011-11-21 at 10:59 +0900, KAMEZAWA Hiroyuki wrote:
    > Could you share your analysis why cpuacct cgroup is slow ?

    It adds accounting to all scheduler hot paths, accounting that is mostly
    duplicate of accounting already done. It also does another cgroup
    hierarchy walk, separate from existing controllers, hitting all cold
    cachelines again.

    IOW, it sucks chunks and I should never have allowed it to be merged.


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