Intel® VTune™ Amplifier XE and Intel® VTune™ Amplifier for Systems Help
This metric represents a floating-point (FP) x87 uops fraction the CPU has executed. It accounts for instructions beyond X87 FP arithmetic operations; hence may be used as a thermometer to avoid X87 high usage and preferably upgrade to modern ISA. Consider compiler flags to generate newer AVX (or SSE) instruction sets, which typically perform better and feature vectors.