Keep in mind that AVX-512 would be a key factor in HPC (in fact the factor for Top500 specifically), and there the BSDs lag hugely. Also, the memory copy for whatever reason favors linux, and Stream is another common HPC benchmark.
Unclear how much of the benefit when it happened was compiler versus OS. E.g. you can run clang on Linux, and HPC shops frequently have multiple compilers available.
This is before keeping in mind that a lot of HPC participants only bother with Linux. So the best linear algebra library, the best interconnect, the best MPI, your chances are much better under Linux just by popularity.
Looks like a recent comparison did show FreeBSD doing great!
https://www.phoronix.com/review/bsd-linux-threadripper-7980x
Keep in mind that AVX-512 would be a key factor in HPC (in fact the factor for Top500 specifically), and there the BSDs lag hugely. Also, the memory copy for whatever reason favors linux, and Stream is another common HPC benchmark.
Unclear how much of the benefit when it happened was compiler versus OS. E.g. you can run clang on Linux, and HPC shops frequently have multiple compilers available.
This is before keeping in mind that a lot of HPC participants only bother with Linux. So the best linear algebra library, the best interconnect, the best MPI, your chances are much better under Linux just by popularity.
In fact, it comes #1 in the final overall summary