Antony Stone - 27.12.21, 18:54:41 CET:
> I'm sure I've read somewhere (and not especially recently) that Linux
> on AMD Ryzen CPUs can be unreliable and/or surprisingly poor
> performance.
>
> Can anyone comment on current (eg: Beowulf / Chimaera with standard
> kernels) operation on such machines?
>
> If it matters, I'm looking at desktop / tower / server motherboards
> and not laptops, and I don't care two hoots about graphics - this
> would be for networked machines accessed exclusively remotely.
>
> Any opinions from personal experience, or pointers to reliable data,
> on the topic would be appreciated :)

Only experience from laptop. ThinkPad T14 Gen 1 with AMD Ryzen 7 PRO
4750U.

Works nicely. I managed to run it below its original specs by compiling
a kernel to "powersave" CPU governor as default. But after I corrected
that I am very pleased with performance of this 8-core hyper threading
CPU. Using "schedutil" governor currently and looking forward to new AMD
P-state driver for Zen 2 and Zen 3 CPU.

I do not expect the Zen 2 desktop CPU experience to be much different,
except for the higher performance of a desktop CPU.


Not relevant for server usage:

Standby mostly works. Even in Windows mode. Up to kernel 5.15 at least.
With 5.16-rc2 I had black screen. Suspend to disk was broken some kernel
releases ago. Memory corruption after waking up leading to BTRFS errors.

Graphics mostly works with for a laptop GPU impressive enough frame
rates at least for not too demanding games.

Best,
--
Martin