Re: [PATCH 0/2] perf stat: add per-core count aggregation

From: Stephane Eranian
Date: Tue Feb 12 2013 - 12:33:48 EST

On Tue, Feb 12, 2013 at 6:29 PM, Andi Kleen <ak@xxxxxxxxxxxxxxx> wrote:
>> > The idea itself is useful.
>> >
>> Yes, it is.
> BTW it would be even more useful if it could print some of the
> statistics turbostat does (in particular frequency and C0 residency)
> Often you only care about cycles not idle, and the frequency
> tells you how fast the cycles happen.
You get C-state residency at the socket level with my perf uncore

This patch is just about helping with unbalance at the physical
core level.

> I think Cx could be added relatively easily as a software event,
> but frequency doesn't fit very well into the perf counting model,
> as it's really sampling.
> -Andi
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