Re: [patch v6 03/21] sched: only count runnable avg on cfs_rq's nr_running

[Alex Shi]

On 04/03/2013 09:23 AM, Paul Turner wrote:
> Nack:
> Vincent is correct, rq->avg is supposed to be the average time that an
> rq is runnable; this includes (for example) SCHED_RT.
> 
> It's intended to be more useful as a hint towards something like a
> power governor which wants to know how busy the CPU is in general.

Thanks PJT&Vincent. agree with your thought.
> 
>> On the other side, periodic LB balance on combined the cfs/rt load, but
>> removed the RT utilisation in cpu_power.
> 
> This I don't quite understand; these inputs are already time scaled (by decay).
> 
> Stated alternatively, what you want is:
>   "average load" / "available power", which is:
>   (rq->cfs.runnable_load_avg + rq->cfs.blocked_load_avg) / (cpu power
> scaled for rt)

Right. understand,


-- 
Thanks Alex
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