Re: [PATCH 6/8] perf: Account freq events per cpu

From: Peter Zijlstra
Date: Thu Aug 01 2013 - 10:40:19 EST

On Thu, Aug 01, 2013 at 04:21:11PM +0200, Frederic Weisbecker wrote:
> > > Yeah, just go with a single global state for now..
> >
> > The perf default is to create inherited counter, which are per cpu
> > anyway. So we'll not loose much.
> So you mean that I keep the per cpu state when event->cpu != -1 and also have
> a global counter for the others. Right?

No, only a single global counter. The fact that perf, by default,
creates a counter per cpu, means that there's little effective
difference between a single global counter and per-cpu counters.
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