The filefreq from v-kat

filefreq's Introduction

NixOS Filefreq - out of tree kernel module derivation

clone the repository (git clone [email protected]:v-kat/filefreq.git) and place the following on top of your configuration.nix:

filefreq = config.boot.kernelPackages.callPackage /cloned-directory/filefreq/filefreq.nix {};

boot.extraModulePackages = [ filefreq ];

rebuild and switch sudo nixos-rebuild switch then sudo insmod /run/current-system/kernel-modules/lib/modules/*/misc/filefreq.ko
check that the module loads dmesg | grep "filefreq"
Might need your cpufreq governor set to "userspace"
This assumes 8 cores and I might go back and modify the code. For now you can modify the 16 in a for loop to change it
Also just settings min to 1GHz to down throttle but ran into architecture support with modifying "scaling_available_frequencies"

Was trying to learn more about nix. Initially tried a kernel flake library https://github.com/jordanisaacs/kernel-module-flake as a builder but was hard to keep it in sync with local kernel version and settings.
I also wanted to use rust but out of tree kernel module documentation for 6.3 and 6.4 isn't good or really existent.
Might look at the acpi cpufreq driver in the future to see about adding more than 3 frequencies and other changes.
I'm trying the https://www.kernel.org/doc/html/latest/admin-guide/pm/amd-pstate.html for now and my main laptop isn't very compatible with mucking with things much further >.<

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