Messages in this thread | | | Date | Mon, 11 Nov 2013 08:39:45 -0800 | From | Arjan van de Ven <> | Subject | Re: [RFC][PATCH v5 00/14] sched: packing tasks |
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> I think the scheduler simply wants to say: we expect to go idle for X > ns, we want a guaranteed wakeup latency of Y ns -- go do your thing.
as long as Y normally is "large" or "infinity" that is ok ;-) (a smaller Y will increase power consumption and decrease system performance)
> I think you also raised the point in that we do want some feedback as to > the cost of waking up particular cores to better make decisions on which > to wake. That is indeed so.
having a hardware driver give a prefered CPU ordering for wakes can indeed be useful. (I'm doubtful that changing the recommendation for each idle is going to pay off, but proof is in the pudding; there are certainly long term effects where this can help)
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