On Tue, Jan 30, 2018 at 07:59:41PM -0800, Andi Kleen wrote:
> > Still, the part I am missing here, is why asking for
> > PERF_SAMPLE_PERIOD voids large PEBS.
>
> I think it was disabled together with frequency mode
> (which we could support too, but it's a bit more work)
>
> But yes PERIOD could probably be allowed.
looks like it's just a matter of adding PERF_SAMPLE_PERIOD
into PEBS_FREERUNNING_FLAGS, we already populate period
in setup_pebs_sample_data
jirka
---
diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h
index 8e4ea143ed96..78f91ec1056e 100644
--- a/arch/x86/events/perf_event.h
+++ b/arch/x86/events/perf_event.h
@@ -93,7 +93,8 @@ struct amd_nb {
PERF_SAMPLE_ID | PERF_SAMPLE_CPU | PERF_SAMPLE_STREAM_ID | \
PERF_SAMPLE_DATA_SRC | PERF_SAMPLE_IDENTIFIER | \
PERF_SAMPLE_TRANSACTION | PERF_SAMPLE_PHYS_ADDR | \
- PERF_SAMPLE_REGS_INTR | PERF_SAMPLE_REGS_USER)
+ PERF_SAMPLE_REGS_INTR | PERF_SAMPLE_REGS_USER | \
+ PERF_SAMPLE_PERIOD)
#define PEBS_REGS \
(PERF_REG_X86_AX | \
