Re: [PATCH 04/34] perf, x86: Support the TSX intx/intx_cp qualifiers

Peter Zijlstra
2012-10-23T12:10:04Z

On Thu, 2012-10-18 at 16:19 -0700, Andi Kleen wrote:
> @@ -826,7 +827,8 @@ static inline bool intel_pmu_needs_lbr_smpl(struct perf_event *event)
> return true;
>
> /* implicit branch sampling to correct PEBS skid */
> - if (x86_pmu.intel_cap.pebs_trap && event->attr.precise_ip > 1)
> + if (x86_pmu.intel_cap.pebs_trap && event->attr.precise_ip > 1 &&
> + x86_pmu.intel_cap.pebs_format < 2)
> return true;
>
> return false;

This seems unrelated to TSX, I suppose it belongs in the previous patch?