41 lines
1.4 KiB
Nix
41 lines
1.4 KiB
Nix
{ lib, ... }:
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{
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# Disable frequency boost by default. Use the intel_pstate driver instead of
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# acpi_cpufreq driver because the acpi_cpufreq driver does not read the
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# complete range of P-States [1]. Use the intel_pstate passive mode [2] to
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# disable HWP, which allows a core to "select P-states by itself". Also, this
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# disables intel governors, which confusingly, have the same names as the
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# generic ones but behave differently [3].
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# Essentially, we use the generic governors, but use the intel driver to read
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# the P-state list.
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# [1] - https://www.kernel.org/doc/html/latest/admin-guide/pm/intel_pstate.html#intel-pstate-vs-acpi-cpufreq
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# [2] - https://www.kernel.org/doc/html/latest/admin-guide/pm/intel_pstate.html#passive-mode
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# [3] - https://www.kernel.org/doc/html/latest/admin-guide/pm/intel_pstate.html#active-mode
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# https://www.kernel.org/doc/html/latest/admin-guide/pm/cpufreq.html
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# set intel_pstate to passive mode
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boot.kernelParams = [
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"intel_pstate=passive"
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];
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# Disable frequency boost
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system.activationScripts = {
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disableFrequencyBoost.text = ''
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echo 1 > /sys/devices/system/cpu/intel_pstate/no_turbo
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'';
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};
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## disable intel_pstate
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#boot.kernelParams = [
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# "intel_pstate=disable"
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#];
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## Disable frequency boost
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#system.activationScripts = {
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# disableFrequencyBoost.text = ''
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# echo 0 > /sys/devices/system/cpu/cpufreq/boost
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# '';
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#};
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}
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