6448a0427f
git-subtree-dir: legacy/server-config git-subtree-mainline:dc481c24b0git-subtree-split:4bc5d57fa6
42 lines
1.2 KiB
Nix
42 lines
1.2 KiB
Nix
{
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...
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}:
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{
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powerManagement = {
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enable = true;
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cpuFreqGovernor = "powersave";
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};
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# Always-on server: disable all sleep targets.
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systemd.targets = {
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sleep.enable = false;
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suspend.enable = false;
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hibernate.enable = false;
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hybrid-sleep.enable = false;
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};
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boot.kernelParams = [
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# Disable NMI watchdog at boot. Eliminates periodic perf-counter interrupts
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# across all cores (~1 W). Safe: apcupsd provides hardware hang detection
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# via UPS, and softlockup watchdog remains active.
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"nmi_watchdog=0"
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# Route kernel work items to already-busy CPUs rather than waking idle ones.
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# Reduces C-state exit frequency at the cost of slightly higher latency on
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# work items -- irrelevant for a server whose latency-sensitive paths are
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# all in userspace (caddy, jellyfin).
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"workqueue.power_efficient=1"
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];
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boot.kernel.sysctl = {
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# Belt-and-suspenders: also set via boot param, but sysctl ensures it
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# stays off if anything re-enables it at runtime.
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"kernel.nmi_watchdog" = 0;
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};
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# Server has no audio consumers. Power-gate the HDA codec at module load.
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boot.extraModprobeConfig = ''
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options snd_hda_intel power_save=1 power_save_controller=Y
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'';
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}
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