Messages in this thread |  | | | Subject | Re: [PATCH] x86,sched: Fix sched_smt_power_savings totally broken | | From | Peter Zijlstra <> | | Date | Tue, 10 Jan 2012 15:41:18 +0100 |
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On Tue, 2012-01-10 at 06:32 -0800, Arjan van de Ven wrote: > > a very good default would be to keep all tasks on one package until half > the cores in the package are busy, and then start spreading out.
Does that still make sense when there's strong NUMA preference? By forcing stuff on a single package you increase the number of remote memory fetches (which generally generate more stalls), also the memory controllers need to stay awake anyway.
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