Linux Kernel now faster for AMD

News
1

I bought an AMD Ryzen 9 5900HX system in May 2022.
It started out fast, but with subsequent updates became a little slower.
As of kernels 5.19.11/12, the benchmarks I’ve rerun are now faster than initially.
So it seems the fix has at least partly been already applied prior the 6.0.0 kernel.

EDIT:
My Linux distro PCLinuxOS, backported the patches in kernels 5.19.11/12 ahead of 6.0.0 release.

Removing an obsolete AMD fix makes Linux kernel 6 quicker

4 Likes
2

Can you share some numbers from your system? Thanks!

3

I really want to buy a new AMD laptop.

in fact, there one AMD 3000+ old desktop retired, but it still working.

4

My system: Lenovo Legion Slimjet 7; AMD Ryzen 9 5900HX, 8C|16T, 3.9 - 4.5 GHz.
Here is an example of times (secs) for one benchmark, with inputs N.
This is a numerically intense, multi-core, parallel processing application.

    N   | 1x10^11 | 5x10^11 | 1x10^12 | 5x10^12 | 1x10^13 |
--------|---------|---------|---------|---------|---------|
 before |  1.12   |  5.85   | 12.14   | 68.04   | 145.01  |
--------|---------|---------|---------|---------|---------|
 after  |  0.913  |  4.654  |  9.597  | 55.897  | 127.403 |
----------------------------------------------------------|

However, all multi|parallel core applications will be faster, though you might not notice.
Things e.g. video|audio|photo editing apps, browsers (multi-core rendering, etc), databases, et al.

Here’s a discussion on this topic from PCLinuxOS (my distro) forum.

2 Likes