hi, I was looking at the offcore stuff and it looks like we might be missing some constraints for offcore response events on Sandy/IvyBridge.
The table 18.8.5 (Off-core Response Performance Monitoring) in Intel SDM states PMC0 for 0xb7 and PMC3 for 0xbb, but there's no other explanation or related description. I can't say/ack if the counters looks bad or right with or without the patch so far.. so just curious ;-) thanks, jirka --- The Intel SDM (18.8.5 Off-core Response Performance Monitoring) states the off-core events MSR_OFFCORE_RSP_0/MSR_OFFCORE_RSP_03 to be defined only for PMC0/PMC3 respectively. Adding related constraints. Signed-off-by: Jiri Olsa <jo...@redhat.com> Cc: Arnaldo Carvalho de Melo <a...@redhat.com> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Corey Ashford <cjash...@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweis...@gmail.com> Cc: Ingo Molnar <mi...@elte.hu> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Paul Mackerras <pau...@samba.org> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> Cc: Stephane Eranian <eran...@google.com> --- arch/x86/kernel/cpu/perf_event_intel.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c index 5dc54fc..d1f240f 100644 --- a/arch/x86/kernel/cpu/perf_event_intel.c +++ b/arch/x86/kernel/cpu/perf_event_intel.c @@ -105,6 +105,8 @@ static struct event_constraint intel_snb_event_constraints[] __read_mostly = INTEL_EVENT_CONSTRAINT(0x48, 0x4), /* L1D_PEND_MISS.PENDING */ INTEL_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PREC_DIST */ INTEL_EVENT_CONSTRAINT(0xcd, 0x8), /* MEM_TRANS_RETIRED.LOAD_LATENCY */ + INTEL_EVENT_CONSTRAINT(0xb7, 0x1), /* MSR_OFFCORE_RSP_0 - PMC0 only*/ + INTEL_EVENT_CONSTRAINT(0xbb, 0x8), /* MSR_OFFCORE_RSP_1 - PMC3 only*/ EVENT_CONSTRAINT_END }; -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/