Messages in this thread |  | | Date | Thu, 14 Feb 2013 11:10:23 +0800 | From | Alex Shi <> | Subject | Re: [patch v4 11/18] sched: log the cpu utilization at rq |
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On 02/12/2013 06:39 PM, Peter Zijlstra wrote: > On Thu, 2013-01-24 at 11:06 +0800, Alex Shi wrote: >> >> The cpu's utilization is to measure how busy is the cpu. >> util = cpu_rq(cpu)->avg.runnable_avg_sum >> / cpu_rq(cpu)->avg.runnable_avg_period; >> >> Since the util is no more than 1, we use its percentage value in later >> caculations. And set the the FULL_UTIL as 100%. >> >> In later power aware scheduling, we are sensitive for how busy of the >> cpu, not how much weight of its load. As to power consuming, it is more >> related with cpu busy time, not the load weight. > > I think we can make that argument in general; that is irrespective of > the actual policy. We simply never had anything better to go with. > > So please clarify why you think this only applies to power aware > scheduling.
Um, the rq->util is a general argument. It can be used on any other places if needed, not power aware scheduling specific. >
-- Thanks Alex
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