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SubjectRe: VST and Sched Load Balance
Srivatsa Vaddagiri wrote:

>
> Hmm ..I guess we could restrict the max time a idle CPU will sleep taking
> into account its balance interval. But whatever heuristics we follow to
> maximize balance_interval of about-to-sleep idle CPU, don't we still run the
> risk of idle cpu being woken up and going immediately back to sleep (because
> there was no imbalance)?
>

Yep.

> Moreover we may be greatly reducing the amount of time a CPU is allowed to
> sleep this way ...
>

Yes. I was assuming you get some kind of fairly rapidly diminishing
efficiency return curve based on your maximum sleep time. If that is
not so, then I agree this wouldn't be the best method.

--
SUSE Labs, Novell Inc.


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