Re: [PATCH] cpuacct: VIRT_CPU_ACCOUNTING don't prevent percpucputime count

[Bharata B Rao]

On Tue, Apr 28, 2009 at 04:38:51PM +0900, KOSAKI Motohiro wrote:
> > On Tue, Apr 28, 2009 at 03:53:32PM +0900, KOSAKI Motohiro wrote:
> 
> > BTW, did you observe any real problem with the percpu counter spinlock ?
> 
> No.
> I review percpu_counter() caller recently and it seems stragen usage.
> 

I should have phrased the question better ...

So have you found any performance degradation with any benchmarks/workloads
on archs which define VIRT_CPU_ACCOUNTING due to percpu_counter spinlock
being taken on every tick ? If the answer is no, don't you think we could
wait before making the kind of change you are proposing ?

Regards,
Bharata.
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