Messages in this thread Patch in this message | | | From | kan.liang@intel ... | Subject | [PATCH 1/1] perf, x86: bug fix for cycles:p and cycles:pp on SLM | Date | Mon, 8 Dec 2014 06:27:43 -0800 |
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From: Kan Liang <kan.liang@intel.com>
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 <kan.liang@intel.com> --- 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
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