Ryzen 5 5600G - Kernel - Processor family - Generic-x86-64?

SlackIT · 04-28-2022, 01:18 AM

Hello,

For compiling kernel support for the Ryzen 5 5600G, is it better to use Opteron/Athlon64/Hammer/K8, or Generic-x86-64?

THANKS

pan64 · 04-28-2022, 02:29 AM

[obviously] better to use amd specific settings. I think it is very well documented.

slac · 04-28-2022, 03:55 AM

Quote:

Originally Posted by pan64

[obviously] better to use amd specific settings. I think it is very well documented.

But which one is the amd specific option though? At least for intel it is more clear, either it is atom or duo core and above.

At least I select generic, and it works well for both Intel and AMD.

SlackIT · 04-28-2022, 07:30 PM

I think this is odd in the Kernel development that later AMD ARCH are not being listed, because Zen 3 is Ryzen 5000, and I would of assumed, when the kernel was updated the latest AMD ARCH Zen would be listed.

Ryzen is not a Opteron/Athlon64/Hammer/K8.

By chance, anyone using the Zen Kernel in Slack?

https://github.com/zen-kernel/zen-kernel

walecha · 04-28-2022, 11:15 PM

All AMD Zen CPU should use generic x86_64.

If you are looking for optimization for specific cpu feature, then it should be in the compiler (GCC/CLANG/LIBC). Meaning that you will have to rebuild your system to use CPU specific optimization flags for the compiler.

SlackIT · 04-29-2022, 03:05 AM

Quote:

Originally Posted by walecha

All AMD Zen CPU should use generic x86_64.

If you are looking for optimization for specific cpu feature, then it should be in the compiler (GCC/CLANG/LIBC). Meaning that you will have to rebuild your system to use CPU specific optimization flags for the compiler.

generic x86_64 hmm

SlackIT · 05-09-2022, 10:50 PM

Well, to be honest, when I look over the replies, one says it's better to go AMD, another says to go Generic...

Hmm

What say anyone else?

THANKS

Jan K. · 05-10-2022, 12:38 AM

Hmmmm... since you have the time

Why not run some stress tests on different compiled kernels to see what - if any? - difference it makes?

As you got different answers to OP, apparently we could all learn a bit from it...

pan64 · 05-10-2022, 12:51 AM

when you compile your kernel the compiler will automatically compile for the given host, will automatically select the best options. So you don't really have to deal with it. But if you want to compile for a different host you need to specify it.
the flag Opteron/Athlon64/Hammer/K8 is used to compile for K8 family CPUs, which is quite outdated nowadays (and actually will switch off cpu auto-detection).

SlackIT · 05-10-2022, 01:08 AM

Quote:

Originally Posted by pan64

when you compile your kernel the compiler will automatically compile for the given host, will automatically select the best options. So you don't really have to deal with it. But if you want to compile for a different host you need to specify it.
the flag Opteron/Athlon64/Hammer/K8 is used to compile for K8 family CPUs, which is quite outdated nowadays (and actually will switch off cpu auto-detection).

Ok, I just went with generic x86_64.

THANKS