Re: [PATCH 11/11] cgroup: use percpu refcnt for cgroup_subsys_states

From: Tejun Heo
Date: Mon Jun 17 2013 - 13:17:03 EST

Hello, Michal.

On Mon, Jun 17, 2013 at 03:27:44PM +0200, Michal Hocko wrote:
> Thanks for your results! Yes the boost can be really high. I will try to
> measure some memcg workloads as soon as I have some spare cycles. I do
> not expect a big win but I also do not think this would regress.

With the just committed RCU-sched conversion, the slowdown even on
single CPU configuration w/ CONFIG_PREEMPT should be in the range of a
few percent points in the worst cases and will mostly be in the noise
in any realistic scenarios. So, yeah, looks pretty good to me. :)


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