SHORT Packed AVX MFLOP/s EVENTSET FIXC0 INSTR_RETIRED_ANY FIXC1 CPU_CLK_UNHALTED_CORE FIXC2 CPU_CLK_UNHALTED_REF PMC0 SIMD_FP_256_PACKED_SINGLE PMC1 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 Packed SP [MFLOP/s] 1.0E-06*(PMC0*8.0)/time Packed DP [MFLOP/s] 1.0E-06*(PMC1*4.0)/time LONG Formulas: Packed SP [MFLOP/s] = 1.0E-06*(SIMD_FP_256_PACKED_SINGLE*8)/runtime Packed DP [MFLOP/s] = 1.0E-06*(SIMD_FP_256_PACKED_DOUBLE*4)/runtime - Packed 32b AVX FLOPs rates. Please note that the current FLOP measurements on IvyBridge are potentially wrong. So you cannot trust these counters at the moment!