SHORT Single Precision MFLOP/s

EVENTSET
FIXC0 INSTR_RETIRED_ANY
FIXC1 CPU_CLK_UNHALTED_CORE
FIXC2 CPU_CLK_UNHALTED_REF
PMC0  FP_COMP_OPS_EXE_SSE_FP_PACKED
PMC1  FP_COMP_OPS_EXE_SSE_FP_SCALAR
PMC2  FP_COMP_OPS_EXE_SSE_SINGLE_PRECISION
PMC3  FP_COMP_OPS_EXE_SSE_DOUBLE_PRECISION

METRICS
Runtime (RDTSC) [s] time
Runtime unhalted [s] FIXC1*inverseClock
Clock [MHz]  1.E-06*(FIXC1/FIXC2)/inverseClock
CPI  FIXC1/FIXC0
SP [MFLOP/s] 1.0E-06*(PMC0*4.0+PMC1)/time
Packed [MUOPS/s]   1.0E-06*PMC0/time
Scalar [MUOPS/s] 1.0E-06*PMC1/time
SP [MUOPS/s] 1.0E-06*PMC2/time
DP [MUOPS/s] 1.0E-06*PMC3/time

LONG
Formulas:
SP [MFLOP/s] = 1.0E-06*(FP_COMP_OPS_EXE_SSE_FP_PACKED*4+FP_COMP_OPS_EXE_SSE_FP_SCALAR)/runtime
Packed [MUOPS/s] = 1.0E-06*FP_COMP_OPS_EXE_SSE_FP_PACKED/runtime
Scalar [MUOPS/s] = 1.0E-06*FP_COMP_OPS_EXE_SSE_FP_SCALAR/runtime
SP [MUOPS/s] = 1.0E-06*FP_COMP_OPS_EXE_SSE_SINGLE_PRECISION/runtime
DP [MUOPS/s] = 1.0E-06*FP_COMP_OPS_EXE_SSE_DOUBLE_PRECISION/runtime
-
The Nehalem has no possibility to measure MFLOPs if mixed precision calculations are done.
Therefore both single as well as double precision are measured to ensure the correctness
of the measurements. You can check if your code was vectorized on the number of
FP_COMP_OPS_EXE_SSE_FP_PACKED versus the FP_COMP_OPS_EXE_SSE_FP_SCALAR.

