SHORT Double 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_DOUBLE PMC1 FP_COMP_OPS_EXE_SSE_FP_SCALAR_DOUBLE PMC2 SIMD_FP_256_PACKED_DOUBLE METRICS Runtime (RDTSC) [s] time Runtime unhalted [s] FIXC1*inverseClock Clock [MHz] 1.E-06*(FIXC1/FIXC2)/inverseClock CPI FIXC1/FIXC0 DP [MFLOP/s] 1.0E-06*(PMC0*2.0+PMC1+PMC2*4.0)/time AVX DP [MFLOP/s] 1.0E-06*(PMC2*4.0)/time Packed [MUOPS/s] 1.0E-06*(PMC0+PMC2)/time Scalar [MUOPS/s] 1.0E-06*PMC1/time Vectorization ratio 100*(PMC0+PMC2)/(PMC0+PMC1+PMC2) LONG Formulas: DP [MFLOP/s] = 1.0E-06*(FP_COMP_OPS_EXE_SSE_FP_PACKED*2+FP_COMP_OPS_EXE_SSE_FP_SCALAR+SIMD_FP_256_PACKED_DOUBLE*4)/runtime AVX DP [MFLOP/s] = 1.0E-06*(SIMD_FP_256_PACKED_DOUBLE*4)/runtime Packed [MUOPS/s] = 1.0E-06*(FP_COMP_OPS_EXE_SSE_FP_PACKED_DOUBLE+SIMD_FP_256_PACKED_DOUBLE)/runtime Scalar [MUOPS/s] = 1.0E-06*FP_COMP_OPS_EXE_SSE_FP_SCALAR_DOUBLE/runtime Vectorization ratio = 100*(FP_COMP_OPS_EXE_SSE_FP_PACKED_DOUBLE+SIMD_FP_256_PACKED_DOUBLE)/(FP_COMP_OPS_EXE_SSE_FP_SCALAR_DOUBLE+FP_COMP_OPS_EXE_SSE_FP_PACKED_DOUBLE+SIMD_FP_256_PACKED_DOUBLE) - SSE scalar and packed double precision FLOP rates. Please note that the current FLOP measurements on SandyBridge are potentially wrong. So you cannot trust these counters at the moment!