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SubjectRe: [RFC PATCH] perf_core: provide a kernel-internal interface to get to performance counters

> This patch adds the needed bits to do enable this functionality; they have been
> tested in an experimental cpufreq driver that I'm working on, and the changes
> are all that I needed to access counters properly.

Very useful for a driver performance analysis.
It doesn't look like you added the new api's to your cpufreq driver yet, can you please provide an example of their usage, possibly monitoring multiple counters concurrently?


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