AMD P-State Preferred Core Support Coming With Linux 6.9

[phoronix]

Phoronix: AMD P-State Preferred Core Support Coming With Linux 6.9

Since last August AMD Linux engineers have been working on P-State Preferred Core support for the "amd_pstate" driver so that this functionality can be leveraged under Linux for improved task placement...

https://www.phoronix.com/news/Linux-6.9-AMD-P-State-Preferred

[V1tol]

v14 patches apply cleanly on top of 6.7.3
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[aufkrawall]

Looking forward to the benchmarks. Though performance remained unchanged for me with 5700X and some basic browser JS benchmarks.

[Anux]

Looking forward to the benchmarks. Though performance remained unchanged for me with 5700X and some basic browser JS benchmarks.

That is to be expected, you will mostly gain a little more efficiency or slightly more performance (+50 MHz?) but nothing in the realm of being noticeable (that would need at least 20% improvement).

[MastaG]

There is a oneliner by Yuan Perry (AMD), which enables amd-pstate on the older Zen2 threadrippers.
See: https://bugzilla.kernel.org/show_bug.cgi?id=218171

If this lands together with preferred core support, then these aging threadrippers from the 3000 series should become more responsive because the preferred cores clock a lot higher then some of the other ones.

That's the power of Linux right there!

[ffs_]

Finally.

[pong]

I wonder if there's any plan to backport / cherry pick this for ubuntu 24.04 lts which presumably will have the 6.8 kernel.

[darkbasic]

I wonder if there's any plan to backport / cherry pick this for ubuntu 24.04 lts which presumably will have the 6.8 kernel.

Don't think so, but I'm personally backporting this since several months and it's worth for energy efficiency on laptops.

[reba]

Do I combine this with passive/active/guided? And which governor?

[EphemeralEft]

Nice.