Messages in this thread | | | Subject | Re: [BUG] perf: sharing of cpuctx between core and ibs PMU causes problems | From | Peter Zijlstra <> | Date | Thu, 09 Aug 2012 20:08:27 +0200 |
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On Thu, 2012-08-09 at 16:05 +0200, Stephane Eranian wrote: > > uncore PMU does not have this issue because uncore_pmu->task_ctx_nr > > is 'perf_invalid_context'. find_pmu_context() always return NULL in > > that case. > > > Yes, I think IBS should do the same and that should fix the problem > there too. Will try that.
I'm afraid not, per-task profiling with uncore doesn't really make that much sense. For IBS it does.
We can't share a context with different PMUs, that'll totally mess up the event scheduling.
We'll have to grow perf_event_task_context with an extra context and have IBS use that.
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