Re: [patch] Performance Counters for Linux, v2

[Andi Kleen]

Ingo Molnar <mingo@xxxxxxx> writes:

> This means that the only correct technical/mathematical argument is to 
> talk about "levels of noise" and how they compare and correlate - and 
> i've seen no actual measurements or estimations pro or contra. Group 
> readout of counters can reduce noise for sure, but it is wrong for you to 
> try to turn this into some sort of all-or-nothing property. Other sources 
> of noise tend to be of much higher of magnitude.

Ingo, could you please describe how PEBS and IBS fit into your model?

Thanks.

-Andi

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