While doing some cooling vs performance testing I noticed that my Sysbench CPU Multi-thread score dropped from 95,000 to 87,000, a significant drop of 8,000.
I’m running a Ryzen 9 5950X on a fully updated Tumbleweed (VERSION_ID=“20250205”) that uses sysbench-1.0.20-1.23.x86_64.rpm
I upgraded some fans and was checking at what point I get negative returns on cooling. You know, more noise without improved cooling. If the fans cools just as good at 60% speed then there’s no point in running them at 100% and generating more noise. That’s when you can turn the fans down a little.
I use Hardinfo as a quick test then use Blender and other benchmarks from the Phoronix Test Suite when tuning the machine or checking for performance problems. You can access the Sysbench CPU Multi-thread benchmark in Hardinfo but you must have Sysbench installed.
You can also run the Sysbench CPU Multi-thread test in a terminal with the command below. Just change the number of threads to match your processor.
sysbench --test=cpu --time=7 --num-threads=32 --cpu-max-prime=10000 run
I had made a few BIOS changes and after a lot of wasted time, I checked for a Sysbench update which did update to version 1.0.20-1.23 on 1-12-2025.
I then installed sysbench version 1.0.19-lp152.1.4 from Leap 15.2 and my score went back to 95,000.
Get Sysbench 1.0.19 From Leap 15.2
I’m not sure if the regression is in Tumbleweed only, or if it’s present in other distros that are using Sysbench 1.0.20. I haven’t found anyone else talking about the issue and maybe they just haven’t noticed. I didn’t notice for over a month until I was doing some testing after installing the new fans.
Those of you using other distros could test this and help determine if it’s only on TW or all distos running Sysbench 1.0.20. Of course, it could be only on my system, but I don’t think so.