AMD Regression On Linux 5.11 Being Addressed By New CPUFreq Patches

[phoronix]

Phoronix: AMD Regression On Linux 5.11 Being Addressed By New CPUFreq Patches

The AMD "frequency invariance" saga with Linux 5.11 continues... While there was a patch to address the previously noted performance regression caused by the introduction of frequency invariance and seen when using the Schedutil governor, a new CPUFreq-side patch series has been proposed instead -- both of which are addressing the performance issue with this new kernel for AMD Zen 2 / Zen 3 systems...

http://www.phoronix.com/scan.php?page=news_item&px=Linux-511-CPUFreq-Inv-Fix-Patch

[milkylainen]

So complex...

[jabl]

Nice job!

[GreenReaper]

That's good news. The BIOS in one of my HP servers appear to block direct access to CPU power management, so acpi_cpufreq is all you get. The old Westmere CPUs don't have much in the way of turbo bins, but I'd still prefer not to lose them.