Re: [PATCH v3 2/7] sched: accumulate per-cfs_rq cpu usage

[Balbir Singh]

* Nikhil Rao <ncrao@xxxxxxxxxx> [2010-10-13 06:46:18]:

> > Quick question for cfs_b->quota == RUNTIME_INF, won't cfs_b->runtime
> > be always > 0?
> 
> Hi Balbir,
> 
> cfs_b->runtime can be 0 if the task group exhausts its quota.
> cfs_b->runtime is a counter that is periodically refreshed to
> cfs_b->quota, and is decremented every time a cfs_rq requests a slice.
>

Thanks, Nikhil

I saw several checks for quota == RUNTIME_INF and saw updates not
happening. Do we track usage for cgroups with infinite quota? IOW, is
runtime updated? If so, why?

-- 
	Three Cheers,
	Balbir
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