Commit 0d5eb14c authored by Adrian Hunter's avatar Adrian Hunter Committed by Peter Zijlstra
Browse files

perf/x86/intel: Do not enable large PEBS for events with aux actions or aux sampling 



Events with aux actions or aux sampling expect the PMI to coincide with the
event, which does not happen for large PEBS, so do not enable large PEBS in
that case.

Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: default avatarAndi Kleen <ak@linux.intel.com>
Link: https://lkml.kernel.org/r/20241022155920.17511-5-adrian.hunter@intel.com
parent 08c7454c

arch/x86/events/intel/core.c

+2 −2
Original line number Diff line number Diff line
@@ -3962,8 +3962,8 @@ static int intel_pmu_hw_config(struct perf_event *event) 


		if (!(event->attr.freq || (event->attr.wakeup_events && !event->attr.watermark))) {

			event->hw.flags |= PERF_X86_EVENT_AUTO_RELOAD;

			if (!(event->attr.sample_type &

			      ~intel_pmu_large_pebs_flags(event))) {

			if (!(event->attr.sample_type & ~intel_pmu_large_pebs_flags(event)) &&

			    !has_aux_action(event)) {

				event->hw.flags |= PERF_X86_EVENT_LARGE_PEBS;

				event->attach_state |= PERF_ATTACH_SCHED_CB;

			}