Support for i7 1365U (thinkpad T14s Gen 4)

[Tuxino88]

Is your feature request related to a problem? Please describe.
This processor has 2 types of cores: 2 Performance-cores core and 8 Efficient-cores (obiviously with different frequency).

it would be possible:

1. set frequencies for P core separately?
2. turn off the P cores?

[linrunner]

You have already throttled the CPU with all available screws:

• platform_profile = low-power
• energy_performance_preference = power
• no_turbo = 1

In particular you configured for

• max_perf_pct = 20%

which means a drastic limitation of the CPU's power consumption and implicitly also limits the operating frequencies (unfortunately the driver does not reflect it in scaling_min/max_freq).

What purpose do you serve by additionally messing with the frequencies?

ps. I absolutely do not understand why so many insist on limiting frequencies although better settings have been available for so long. I am now seriously considering whether to remove the frequency settings for the intel_pstate altogether.

[Tuxino88]

I don't know how the kernel (intel_pstate) handles P cores, so I wanted to figure out how to limit them when running on battery power.
At first glance, looking at the histograms, it seems that they are used indiscriminately like E cores.
My doubts are all here.

[linrunner]

I see. If the intel_pstate driver does not do what you expect, then you should address the issue to its developers.