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Nie pamiętam teraz dokładnie, ale większość była w standardzie już poustawiana w Debianie.
Reszta to na podstawie powertop w kilku dodatkowych skryptach.

Nie wiem czy zamiast ustawień via /…/cpufreq/scaling_min_freq dla intel_pstate nie będą lepsze te w lokalizacji /sys/devices/system/cpu/intel_pstate/
Albo ich używać razem.
Trzeba by poeksperymentować dłużej ;)

Bo tym się to powinno ustawiać.
intel_pstate nie działa już tylko na samych częstotliwościach:

In the ten year old, single core, no hyperthreading world, things were relatively simple. You could basically map a P state to some "frequency" that you'd get, and as the marketing folks told us, a higher frequency means more performance.

Today, things are much more complex in several key ways.

First of all, and this is important and different from 10 years ago... no matter which P state you ask for, when a logical processor is idle (C state), its frequency is typically 0. The exception to this "typically" is the lightest of the C states (C1), where the frequency is the lowest frequency the CPU supports, and not zero. (but going into C1 is pretty rare, and very short lived, so for this posting, I'm going to ignore C1).

A second important aspect is that of "coordination". For practical reasons, on current Intel processors, all the cores in a package share the same voltage. And because running at a lower frequency than possible at a certain voltage is inefficient, all the cores will also share the same clock frequency at any one time. Of course, except the cores that are idle, because their frequency is zero!
Because the OS will ask each individual logical processor for a separate P state, some reconciliation is needed between the different cores. This reconciliation is actually very simple, at any point in time, the frequency of all the cores is the maximum of what each of the individual cores wants. Of course, minus the idle cores. Their frequency is zero, and the maximum of "something" and "zero" is "something".[/quote]
https://plus.google.com/114657443111661859546/posts/dLn9T4ehywL

I w tych plikach masz zakres działania, który sobie możesz po swojemu ustawić:

Kod:

echo 100 > /sys/devices/system/cpu/intel_pstate/max_perf_pct
cpufreq-info |grep current
  current policy: frequency should be within 800 MHz and 2.90 GHz.
  current CPU frequency is 2.88 GHz (asserted by call to hardware).
  current policy: frequency should be within 2.90 GHz and 2.90 GHz.
  current CPU frequency is 2.90 GHz (asserted by call to hardware).
  current policy: frequency should be within 2.90 GHz and 2.90 GHz.
  current CPU frequency is 2.19 GHz (asserted by call to hardware).
  current policy: frequency should be within 2.90 GHz and 2.90 GHz.
  current CPU frequency is 2.21 GHz (asserted by call to hardware).

Kod:

echo 10 > /sys/devices/system/cpu/intel_pstate/max_perf_pct
cpufreq-info |grep current
  current policy: frequency should be within 800 MHz and 2.90 GHz.
  current CPU frequency is 782 MHz (asserted by call to hardware).
  current policy: frequency should be within 2.90 GHz and 2.90 GHz.
  current CPU frequency is 782 MHz (asserted by call to hardware).
  current policy: frequency should be within 2.90 GHz and 2.90 GHz.
  current CPU frequency is 782 MHz (asserted by call to hardware).
  current policy: frequency should be within 2.90 GHz and 2.90 GHz.
  current CPU frequency is 782 MHz (asserted by call to hardware).

current policy: frequency should be within 2.90 GHz and 2.90 GHz.[/quote]
Jeszcze nie dostrzegam w tym logiki, ale pewnie jakiś w tym sens jest ;)

Po ustawieniu min na 0 a max na 100 mam takie:

Kod:

cpufreq-info |grep current
  current policy: frequency should be within 800 MHz and 2.90 GHz.
  current CPU frequency is 1.15 GHz (asserted by call to hardware).
  current policy: frequency should be within 2.90 GHz and 2.90 GHz.
  current CPU frequency is 1.27 GHz (asserted by call to hardware).
  current policy: frequency should be within 2.90 GHz and 2.90 GHz.
  current CPU frequency is 1.15 GHz (asserted by call to hardware).
  current policy: frequency should be within 2.90 GHz and 2.90 GHz.
  current CPU frequency is 1.29 GHz (asserted by call to hardware).

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