Re: [BUG] perf stat: explicit grouping yields unexpected results

[Peter Zijlstra]

On Fri, Nov 15, 2013 at 07:34:57AM +0100, Ingo Molnar wrote:
> Btw., does the kernel side currently support discovery of such 
> impossible group scheduling constraints at group setup time? 

Up to a point.

> If not 
> then it probably should and it should reject them straight away.

We do I think, for the case where its obvious it can never fit.

That said, if you have a pinned cpu event, it all comes apart.
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