hi , May I ask a question ? Any help are appreciated. If we set -march/tune to define processor, we can obtain some extra performance improvement. I want to run my application on different intel processor family, for example: broadwell, skylake, haswell, skylake-avx512. What should I set? Does It like the following ? -march=broadwell -mtune=intel -mmmx -msse -msse -msse2 -msse3 -mavx -mavx2 -mavx=512f -mavx512pf ... BTW: current gcc version is 7.3 on centos 7.2 Thanks Longda