Re: [RFC][PATCH v5 00/14] sched: packing tasks

[Arjan van de Ven]

> 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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