Re: [patch v4 11/18] sched: log the cpu utilization at rq

[Peter Zijlstra]

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.

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