CYCLE_ACTIVITY.STALLS_L1D_PENDING is always zero about pmu-tools HOT 4 CLOSED

Does cmask=12 work correctly too?

Yes it looks like a bug in the event list. I'll report it.
For now you can patch the event list manually in ~/.cache/pmu-events/GenuineIntel-6-3F.json

from pmu-tools.

It turned out to be a kernel bug. 12 is the correct cmask, but the kernel would schedule it on the wrong counter.

Kernel patch (cut'n'pasted, may need to be applied manually)

diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index 9f1dd18..35d9f5a 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -212,11 +212,11 @@ static struct event_constraint intel_hsw_event_constraints[] = {
INTEL_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PREC_DIST /
INTEL_EVENT_CONSTRAINT(0xcd, 0x8), / MEM_TRANS_RETIRED.LOAD_LATENCY /
/ CYCLE_ACTIVITY.CYCLES_L1D_PENDING */

•   INTEL_EVENT_CONSTRAINT(0x08a3, 0x4),
  

•   INTEL_UEVENT_CONSTRAINT(0x08a3, 0x4),
  /\* CYCLE_ACTIVITY.STALLS_L1D_PENDING */
  

•   INTEL_EVENT_CONSTRAINT(0x0ca3, 0x4),
  

•   INTEL_UEVENT_CONSTRAINT(0x0ca3, 0x4),
  /\* CYCLE_ACTIVITY.CYCLES_NO_EXECUTE */
  

•   INTEL_EVENT_CONSTRAINT(0x04a3, 0xf),
  

•   INTEL_UEVENT_CONSTRAINT(0x04a3, 0xf),
  EVENT_CONSTRAINT_END
  

  };

from pmu-tools.

That didn't work well because MarkDown. Here's the patch

https://git.kernel.org/cgit/linux/kernel/git/ak/linux-misc.git/commit/?h=perf/hsw-event-constraints&id=646836a5ee6435e37de44f0e282752600b26af62

from pmu-tools.

Thanks! I just tried with a patched kernel. perf now reports the numbers correctly.

from pmu-tools.