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    SubjectRe: [RFC] sched: CPU topology try
    On Wed, Jan 08, 2014 at 12:35:34PM +0000, Morten Rasmussen wrote:
    > > Currently we detect overload by sg.nr_running >= sg.capacity, which can
    > > be very misleading because while a cpu might have a task running 'now'
    > > it might be 99% idle.
    > >
    > > At which point I argued we should change the capacity thing anyhow. Ever
    > > since the runnable_avg patch set I've been arguing to change that into
    > > an actual utilization test.
    > >
    > > So I think that if we measure overload by something like >95% utilization
    > > on the entire group the load scaling again makes perfect sense.
    >
    > I agree that it make more sense to change the overload test to be based
    > on some tracked load. How about the non-overloaded case? Load balancing
    > would have to be based on unweighted task loads in that case?

    Yeah, until we're overloaded our goal is to minimize idle time.


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