Re: [DRAFT PATCH 2/3] perf: Implement Nehalem uncore pmu

[Peter Zijlstra]

On Tue, 2010-11-02 at 17:59 +0100, Stephane Eranian wrote:
> I think using uncore PMU to measure per-thread is pretty much useless.
> Maybe it should not even be allowed. There is no way you can correlate
> the counts you're getting to a place in your program. Or put differently,
> sampling in per-thread mode using uncore is useless. 

Right, per-task uncore event should not be allowed. I think it as simple
as setting pmu::task_ctx_nr = perf_invalid_context.
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