From: Kan Liang <[email protected]> cycles:p and cycles:pp don't work on SLM since 86a0446
This regression issue is because UOPS_RETIRED.ALL is not a PEBS event on SLM. According to pebs_aliases, INST_RETIRED.ANY_P (a PEBS capable event) can be used as an alternative way to count cycles. Roll back the pebs_constraints to use INST_RETIRED.ANY_P. Signed-off-by: Kan Liang <[email protected]> --- arch/x86/kernel/cpu/perf_event_intel_ds.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c index 3c895d4..ac8f941 100644 --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c @@ -568,8 +568,8 @@ struct event_constraint intel_atom_pebs_event_constraints[] = { }; struct event_constraint intel_slm_pebs_event_constraints[] = { - /* UOPS_RETIRED.ALL, inv=1, cmask=16 (cycles:p). */ - INTEL_FLAGS_EVENT_CONSTRAINT(0x108001c2, 0xf), + /* INST_RETIRED.ANY_P */ + INTEL_UEVENT_CONSTRAINT(0x00c0, 0x1), /* Allow all events as PEBS with no flags */ INTEL_ALL_EVENT_CONSTRAINT(0, 0x1), EVENT_CONSTRAINT_END -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
