[Bug 215729] amd-pstate driver has a much higher idle power consumption for a desktop Zen 3 CPU

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=215729

Huang Rui (huangrui@mail.ustc.edu.cn) changed:

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                 CC|                            |huangrui@mail.ustc.edu.cn

--- Comment #3 from Huang Rui (huangrui@mail.ustc.edu.cn) ---
(In reply to Artem S. Tashkinov from comment #0)
> I have a Ryzen 7 5800X CPU.
> 
> With the acpi-cpufreq driver the CPU idles around 20W, frequencies are in
> the range of 2.2-2.8GHz.
> 
> The very same system with the amd-pstate driver idles around 25W frequencies
> are in the range of 3.9-4.75GHz.
> 
> This doesn't look right.
> 
> Changing governor from ondemand to powersave reduces idle power consumption
> to around 21.5W (still higher than with acpi-cpufreq) but this obvious
> completely destroys performance.

Thanks to report the issue. Could you please dump the print of "lscpu" and use
the latest bleeding-edge source code include the CPUPower support
(https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git/log/?h=bleeding-edge)
to print "cpupower frequency-info"?

Thanks,
Ray

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