Posted by BeauHD from the importance-of-software-optimizations dept.
Phoronix’s Michael Larabel benchmarked AMD’s latest Ryzen 9 9950X in several different Linux distros and found that the Zen 5 chip performs up to 16% faster with the Intel-optimized Clear Linux distro. Here’s an excerpt from the report: The Linux distributions for this round of testing on the AMD Ryzen 9 9950X included Arch Linux, CachyOS, Clear Linux, Fedora Workstation 40, Ubuntu 24.04 LTS, and a recent daily snapshot of Ubuntu 24.10 in its current development form. Intel’s Clear Linux is the one most interesting for looking at on the new AMD Zen 5 hardware. While there hasn’t been so much Clear Linux news in recent times, it remains the most well optimized x86_64 Linux distribution out of the box. Clear Linux makes use of compiler function multi versioning, performance-minded defaults, aggressive compiler CFLAGS/CXXFLAGS defaults, optional AVX-512 usage for more libraries, and many other patches and optimizations in the name of delivering the greatest x86_64 Linux performance. And while not Intel’s focus, it works typically on AMD hardware too. […]
Using the same Ryzen 9 9950X system, all of these Linux distributions were tested in their default / out-of-the-box state. […] When taking the geometric mean of 59 benchmarks run across all of the Linux distributions on this AMD Ryzen 9 9950X system, Intel’s Clear Linux easily took the crown. Ubuntu 24.04 LTS — which was used for all of the Ryzen 9000 series Linux testing so far on Phoronix — was the slowest. Tapping Intel’s Clear Linux netted a 16% improvement on top of the performance offered by Ubuntu 24.04 LTS! Ubuntu 24.04 with the Ryzen 9000 series was already looking great generationally, but as shown today the performance can be even better with further software optimizations.
The Arch Linux powered CachyOS that is tuned out-of-the-box with a similar aim to Clear Linux also performed great. CachyOS was 7% faster than Ubuntu 24.04 LTS based on the geo mean and 3% faster than upstream Arch Linux itself. For different workloads though the CachyOS advantage over Arch Linux varied from a minimal difference to quite significant advantages. From the performance of PHP and Python scripts atop Clear Linux to compiling various server and HPC minded software, Intel’s Clear Linux — and a commendable second place for CachyOS — were showing that even greater performance can be achieved on the AMD Ryzen 9 9950X. Even for devoted Ubuntu Linux users, these results did show some nice advantages of the upcoming Ubuntu 24.10 release over Ubuntu 24.04 LTS thanks to the GCC 14 compiler. Ubuntu 24.10 performance is also still subject to change since the current daily ISOs haven’t yet moved past the Linux 6.8 kernel while Ubuntu 24.10 in October will be shipping with Linux 6.11.
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