Messages in this thread | | | Date | Fri, 08 Apr 2005 00:06:54 +1000 | From | Nick Piggin <> | Subject | Re: VST and Sched Load Balance |
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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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