SHORT UOP retirement stalls 

EVENTSET
FIXC0 INSTR_RETIRED_ANY
FIXC1 CPU_CLK_UNHALTED_CORE
FIXC2 CPU_CLK_UNHALTED_REF
PMC0  UOPS_RETIRED_STALLED_CYCLES
PMC1  UOPS_RETIRED_STALLS

METRICS
Runtime (RDTSC) [s] time
Runtime unhalted [s] FIXC1*inverseClock
Clock [MHz]  1.E-06*(FIXC1/FIXC2)/inverseClock
CPI  FIXC1/FIXC0
Number of stalls PMC1
Avg. stall duration [cyc] PMC0/PMC1
Stall ratio PMC0/FIXC1

LONG
Formulas:
Number of stalls = UOPS_RETIRED_STALLS
Avg. stall duration [cyc] = UOPS_RETIRED_STALLED_CYCLES/UOPS_RETIRED_STALLS
Stall ratio = UOPS_RETIRED_STALLED_CYCLES/CPU_CLK_UNHALTED_CORE
-
This group measures stalls in the UOP retirement.