Linux isn't free of performance regressions with new architecture. There were patches last year to better support Epyc's NUMA. https://git.kernel.org/pub/scm/

Linux isn't free of performance regressions with new architecture. There were patches last year to better support Epyc's NUMA. https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=051f3ca02e46432c0965e8948f00c07d8a2f09c0 https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-n... It just seems that Linux avoided any regressions this year but Microsoft didn't.