Commit-ID: 6113af14c82726d5a2993a7ba238df24c990a5ee Gitweb: http://git.kernel.org/tip/6113af14c82726d5a2993a7ba238df24c990a5ee Author: Stephane Eranian <eranian@xxxxxxxxxx> AuthorDate: Wed, 11 Sep 2013 08:22:22 -0700 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitDate: Thu, 12 Sep 2013 07:58:26 +0200 perf/x86: Add constraint for IVB CYCLE_ACTIVITY:CYCLES_LDM_PENDING The IvyBridge event CYCLE_ACTIVITY:CYCLES_LDM_PENDING can only be measured on counters 0-3 when HT is off. When HT is on, you only have counters 0-3. If you program it on the eight counters for 1s on a 3GHz IVB laptop running a noploop, you see: 2 747 527 CYCLE_ACTIVITY:CYCLES_LDM_PENDING 2 747 527 CYCLE_ACTIVITY:CYCLES_LDM_PENDING 2 747 527 CYCLE_ACTIVITY:CYCLES_LDM_PENDING 2 747 527 CYCLE_ACTIVITY:CYCLES_LDM_PENDING 3 280 563 608 CYCLE_ACTIVITY:CYCLES_LDM_PENDING 3 280 563 608 CYCLE_ACTIVITY:CYCLES_LDM_PENDING 3 280 563 608 CYCLE_ACTIVITY:CYCLES_LDM_PENDING 3 280 563 608 CYCLE_ACTIVITY:CYCLES_LDM_PENDING Clearly the last 4 values are bogus. Signed-off-by: Stephane Eranian <eranian@xxxxxxxxxx> Cc: peterz@xxxxxxxxxxxxx Cc: ak@xxxxxxxxxxxxxxx Cc: zheng.z.yan@xxxxxxxxx Cc: dhsharp@xxxxxxxxxx Link: http://lkml.kernel.org/r/20130911152222.GA28761@xxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- arch/x86/kernel/cpu/perf_event_intel.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c index 0abf674..c62d883 100644 --- a/arch/x86/kernel/cpu/perf_event_intel.c +++ b/arch/x86/kernel/cpu/perf_event_intel.c @@ -124,6 +124,7 @@ static struct event_constraint intel_ivb_event_constraints[] __read_mostly = INTEL_UEVENT_CONSTRAINT(0x0148, 0x4), /* L1D_PEND_MISS.PENDING */ INTEL_UEVENT_CONSTRAINT(0x0279, 0xf), /* IDQ.EMTPY */ INTEL_UEVENT_CONSTRAINT(0x019c, 0xf), /* IDQ_UOPS_NOT_DELIVERED.CORE */ + INTEL_UEVENT_CONSTRAINT(0x02a3, 0xf), /* CYCLE_ACTIVITY.CYCLES_LDM_PENDING */ INTEL_UEVENT_CONSTRAINT(0x04a3, 0xf), /* CYCLE_ACTIVITY.CYCLES_NO_EXECUTE */ INTEL_UEVENT_CONSTRAINT(0x05a3, 0xf), /* CYCLE_ACTIVITY.STALLS_L2_PENDING */ INTEL_UEVENT_CONSTRAINT(0x06a3, 0xf), /* CYCLE_ACTIVITY.STALLS_LDM_PENDING */ -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html