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My initial testing of the Linux 7.1 development kernel on various systems in the lab continues going well. Aside from one main regression in a synthetic micro-benchmark appearing on multiple systems, not seeing much in the way of Linux 7.1 performance concerns thus far and seeing some nice performance gains in select workloads.
Last week I shared some early Linux 7.1 benchmarks on an EPYC server with wins for the likes of Pogocache, Memcached, Cockroach DB, and various networking tests. The main regression observed there was with the Futex micro-benchmark of Stress-NG when comparing Linux 7.0 and Linux 7.1-rc1.
While the HP Z6 G5 A workstation was in the lab for review, I also took the opportunity to run some Linux 7.0 vs. 7.1-rc1 kernel benchmarks on that AMD Ryzen Threadripper PRO (Zen 5) workstation.
A number of network improvements were observed for both TCP and UDP when testing with Microsoft’s Ethr. Other Linux 7.1 system testing also pointed to performance improvements, especially with UDP.
The Sockperf network socket benchmark was also showing better performance with Linux 7.1-rc1.
For heavy HPC workloads there didn’t tend to be much of a difference out of Linux 7.1 on this 32-core Threadripper workstation.
The OCUDU software radio application was showing better performance out of running on Linux 7.1.
This was another system showing the Futex micro-benchmark with Stress-NG performing slower on Linux 7.1-rc1 compared to Linux 7.0.
The socket activity performance had also receded on Linux 7.1-rc1 for this HP workstation.
Like other AMD Zen 5 systems tested on Linux 7.1 thus far, the context switching performance is improved with this new kernel version.
There were also improvements for the Nginx HTTPS web server performance with Linux 7.1.
For some LLMs with Llama.cpp were some nice prompt processing speed-ups on Linux 7.1 when using the CPU OpenBLAS back-end.
Those were the main takeaways from running around 100 benchmarks on this HP Z6 G5 A workstation using the AMD Ryzen Threadripper PRO 9975WX. The main concern was again seeing a regression in the futex performance but for many other workloads tested were some nice gains in running the development Linux 7.1 kernel build.
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