hetzner-ex101: limit maximum frequency
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hetzner-ex101: limit to 4.5Ghz
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@ -1,8 +1,32 @@
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{
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{ pkgs, ... }: {
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# Enable raid support specifically, this will disable srvos's
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# systemd-initrd as well, which currently is not compatible with mdraid.
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boot.initrd.services.swraid.enable = true;
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systemd.services.mdmonitor.enable = false;
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boot.loader.systemd-boot.enable = true;
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boot.loader.efi.canTouchEfiVariables = true;
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# We are not limited by zfs, so we can use the latest kernel
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boot.kernelPackages = pkgs.linuxPackages_latest;
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# looks like the Intel i9-13900 draws too much power and crashes the system
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systemd.services.limit-cpu-freq = {
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description = "Limit CPU frequency to 4.2GHz";
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wantedBy = [ "multi-user.target" ];
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after = [ "systemd-modules-load.service" ];
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# Some cores do have a scaling max freq less than 5GHz, so we need to
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# check for that or else all cores will run at 800MHz
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script = ''
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#!/bin/sh
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for f in /sys/devices/system/cpu/cpu*/cpufreq/scaling_max_freq; do
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old_val="$(<"$f")"
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if [[ "$old_val" -gt 4200000 ]]; then
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echo 4200000 > "$f"
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fi
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done
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'';
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serviceConfig = {
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Type = "oneshot";
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};
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};
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}
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