Running AMD EPYC 7773X Milan-X With Linux 5.18's Performance Improvements

Written by Michael Larabel in Software on 15 April 2022 at 08:00 AM EDT.
AMD EPYC 7773X Linux Kernels
AMD EPYC 7773X Linux Kernels
AMD EPYC 7773X Linux Kernels
AMD EPYC 7773X Linux Kernels
AMD EPYC 7773X Linux Kernels
AMD EPYC 7773X Linux Kernels
AMD EPYC 7773X Linux Kernels
AMD EPYC 7773X Linux Kernels
AMD EPYC 7773X Linux Kernels

Moving to Linux 5.18 did tend to show the best performance albeit for most cases just incrementally better performance though in some cases there were significant differences. In some cases there were also improvements present when using Linux 5.17.

AMD EPYC 7773X Linux Kernels

Over the span of 64 different tests carried out, Linux 5.18 Git was indeed the fastest of the tested kernels on this AMD EPYC 7773X server. Overall switching to this bleeding-edge kernel code was about 4% faster than the stock Linux 5.15 kernel used by Ubuntu 22.04 LTS but in some cases like where particularly benefiting from the scheduler NUMA optimization there were much greater gains to enjoy. Again, this isn't anything specific to Milan-X but other AMD EPYC CPUs are also benefiting on Linux 5.18. So if you are really focused on maximum HPC performance with Milan-X, switching to a newer kernel may be something to consider. As shown as well, the AMD AOCC compiler is helping too on Milan-X as another area. But even with a stock kernel and compiler, AMD EPYC 7773X for heavy HPC workloads tends to already shoot well past the competition.

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Michael Larabel

Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.