Messages in this thread | | | Date | Mon, 23 Jun 2014 20:47:57 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH v2] sched: Fast idling of CPU when system is partially loaded |
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On Mon, Jun 23, 2014 at 06:22:34PM +0200, Andi Kleen wrote: > > So I don't get why we can't do the below; I think Jason tried to ask the > > same... > > The important part for performance is to minimize the cache line transfers. Your > unconditional variant would cause more dirty cache lines than Tim's, > right?
Don't think so. We already have the overloaded thing on stack and dirty, and the only thing it needs is rq->nr_running and we already unconditionally load that.
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