Messages in this thread | | | Date | Thu, 21 Mar 2013 15:43:21 +0800 | From | Alex Shi <> | Subject | Re: [patch v5 14/15] sched: power aware load balance |
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On 03/20/2013 12:57 PM, Preeti U Murthy wrote: > Neither core will be able to pull the task from the other to consolidate > the load because the rq->util of t2 and t4, on which no process is > running, continue to show some number even though they degrade with time > and sgs->utils accounts for them. Therefore, > for core1 and core2, the sgs->utils will be slightly above 100 and the > above condition will fail, thus failing them as candidates for > group_leader,since threshold_util will be 200.
Thanks for note, Preeti!
Did you find some real issue in some platform? In theory, a totally idle cpu has a zero rq->util at least after 3xxms, and in fact, I find the code works fine on my machines.
-- Thanks Alex
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