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Subject[PATCH] perf events, x86: Add SandyBridge stalled-cycles-frontend/backend events
Date
Extend the Intel SandyBridge PMU driver with definitions
for generic front-end and back-end stall events.

( As commit 3011203 says, these are only approximations. )

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
---
arch/x86/kernel/cpu/perf_event_intel.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index c1ec7a5..61cbf48 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -1485,6 +1485,12 @@ static __init int intel_pmu_init(void)

x86_pmu.event_constraints = intel_snb_event_constraints;
x86_pmu.pebs_constraints = intel_snb_pebs_events;
+
+ /* UOPS_ISSUED.ANY,c=1,i=1 to count stall cycles */
+ intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = 0x180010e;
+ /* UOPS_DISPATCHED.THREAD,c=1,i=1 to count stall cycles*/
+ intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = 0x18001b1;
+
pr_cont("SandyBridge events, ");
break;

--
1.7.4.4


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