diff mbox series

[V5,03/12] perf/x86/intel: Do not enable large PEBS for events with aux actions or aux sampling

Message ID 20240208113127.22216-4-adrian.hunter@intel.com
State New
Headers
Series perf/core: Add ability for an event to "pause" or "resume" AUX area tracing |

Commit Message

Adrian Hunter Feb. 8, 2024, 11:31 a.m. UTC 
  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: Adrian Hunter <adrian.hunter@intel.com>
---
 arch/x86/events/intel/core.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 3804f21ab049..d50f4325d42a 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -3885,6 +3885,12 @@  static inline bool intel_pmu_has_cap(struct perf_event *event, int idx)
 	return test_bit(idx, (unsigned long *)&intel_cap->capabilities);
 }
 
+static inline bool has_aux_action(struct perf_event *event)
+{
+	return event->attr.aux_pause || event->attr.aux_resume ||
+	       event->attr.aux_sample_size;
+}
+
 static int intel_pmu_hw_config(struct perf_event *event)
 {
 	int ret = x86_pmu_hw_config(event);
@@ -3902,8 +3908,8 @@  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;
 			}