Re: [PATCH] cpuidle: menu: use nr_running instead of cpuload forcalculating perf mult

[Peter Zijlstra]

On Mon, 2012-06-04 at 14:24 +0400, Vladimir Davydov wrote:
> rq->cpuload strongly depends on cgroup hierarchy. For example, if hundreds of
> tasks are running inside cpu:/test cgroup, the sum of cpuload over all cpus
> won't exceed 1024 (by default). That makes the cpuidle menu governor take wrong
> decisions, which can negatively affect overall performance.
> 
> To cope this, use nr_running last seen in __update_cpu_load() instead of
> cpuload for calculating performance multiplier.

What is cpuidle trying to do?
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