Re: [patch] Performance Counters for Linux, v2

[Chris Friesen]

Ingo Molnar wrote:

> When there are two (or more) hw metrics to profile, the ideally best 
> (i.e. the statistically most stable and most relevant) sampling for the 
> two statistical variables (say of l2_misses versus l2_accesses) is to 
> sample them independently, via their own metric. Not via a static 1khz 
> rate - or via picking one of the variables to generate samples.

Regardless of sampling method, don't you still want some way to 
enable/disable the various counters as close to simultaneously as possible?

Chris
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