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    SubjectRe: [discussion]sched: a rough proposal to enable power saving in scheduler
    On Thu, Aug 16, 2012 at 07:01:25AM -0700, Arjan van de Ven wrote:
    > > *Power policy*:
    > >
    > > So how is power policy different? As Peter says,'pack more than spread
    > > more'.
    >
    > this is ... a dubiously general statement.
    >
    > for good power, at least on Intel cpus, you want to spread. Parallelism is efficient.

    Is this really true? In a two-socket system I'd have thought the benefit
    of keeping socket 1 in package C3 outweighed the cost of keeping socket
    0 awake for slightly longer.

    --
    Matthew Garrett | mjg59@srcf.ucam.org


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