[Bug 218686] Fail to set energy_performance_preference of amd processor on asus ga403uv

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=218686

--- Comment #93 from al0uette@outlook.com ---
(In reply to derp from comment #90)
> There's no ideal diagnostic tool for that, as for frequencies they are seen
> as something like that, but it was probably the same or very close without
> CPPC
> 
> (I wouldn't mind if all of these somehow got to 400Mhz instead of 1400Mhz
> though)
> 
> cat /proc/cpuinfo|grep MHz|sort
> cpu MHz         : 1395.796
> cpu MHz         : 1396.448
> cpu MHz         : 1397.373
> cpu MHz         : 1397.388
> cpu MHz         : 1397.403
> cpu MHz         : 1397.414
> cpu MHz         : 1397.434
> cpu MHz         : 400.000
> cpu MHz         : 400.000
> cpu MHz         : 400.000
> cpu MHz         : 400.000
> cpu MHz         : 400.000
> cpu MHz         : 400.000
> cpu MHz         : 400.000
> cpu MHz         : 400.000
> cpu MHz         : 400.000
> 
> the main difference can be seen in amdgpu_top, which for some reason treats
> CPU cores as GPU cores
> it can show mW per Core, and even when frequency stays at 1400, the mW power
> assigned to these cores is much much smaller, as well as total "GFX" power
> which is the total APU power, I guess
> 
> "GFX" is now about 700 mW and "SoC" about 400mW when idle
> 
> power savings are about 1W for system idle and low-power activities

Strangely, the gfx power almost always stays above 2000mw for me, the lowest
value it can go is about 1600mw, but it can only stay there for just 1 second.
Is it because our cpu are different? But even though my power consumption is
higher than you, it's still better than acpi-cpufreq and the cpu temperature is
significantly lower than acpi-cpufreq

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