84 lines
2.2 KiB
Nix
84 lines
2.2 KiB
Nix
{ config, lib, inputs, pkgs, ... }: {
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boot = {
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modprobeConfig.enable = true;
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kernelModules = [ "tcp_bbr" ];
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extraModprobeConfig =
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"options nvidia NVreg_UsePageAttributeTable=1 \
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NVreg_InitializeSystemMemoryAllocations=0 \
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NVreg_DynamicPowerManagement=0x02";
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kernel.sysctl = {
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"kernel.split_lock_mitigate" = 0;
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"kernel.nmi_watchdog" = 0;
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"net.core.netdev_max_backlog" = 4096;
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"fs.file-max" = 2097152;
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"net.ipv4.tcp_congestion_control" = "bbr";
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};
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};
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services = {
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earlyoom = {
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enable = true;
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freeSwapThreshold = 2;
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freeMemThreshold = 2;
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extraArgs = [
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"-g" "--avoid" "'^(X|plasma.*|konsole|kwin|wayland|gnome.*)$'"
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];
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};
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udev = {
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enable = true;
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extraRules = ''
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# Enable runtime PM for NVIDIA VGA/3D controller devices on driver bind
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ACTION=="add|bind", SUBSYSTEM=="pci", DRIVERS=="nvidia", \
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ATTR{vendor}=="0x10de", ATTR{class}=="0x03[0-9]*", \
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TEST=="power/control", ATTR{power/control}="auto"
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# Disable runtime PM for NVIDIA VGA/3D controller devices on driver unbind
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ACTION=="remove|unbind", SUBSYSTEM=="pci", DRIVERS=="nvidia", \
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ATTR{vendor}=="0x10de", ATTR{class}=="0x03[0-9]*", \
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TEST=="power/control", ATTR{power/control}="on"
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'';
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};
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preload-ng = {
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enable = true;
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settings = {
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cycle = 15;
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memTotal = -5;
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memFree = 70;
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memCached = 10;
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memBuffers = 50;
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minSize = 1000000;
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processes = 60;
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sortStrategy = 0;
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autoSave = 1800;
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mapPrefix = "/nix/store/;/run/current-system/;!/";
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exePrefix = "/nix/store/;/run/current-system/;!/";
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};
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};
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};
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systemd.services.set-min-free-mem = {
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description = "Set vm.min_free_kbytes dynamically";
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wantedBy = [ "multi-user.target" ];
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after = [ "local-fs.target" ];
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serviceConfig = {
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User = "root";
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RemainAfterExit = true;
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};
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script = ''
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TOTAL_MEM=$(${pkgs.gawk}/bin/awk '/MemTotal/ {printf "%.0f", $2 * 0.01}' /proc/meminfo)
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if [ -z "$TOTAL_MEM" ] || [ "$TOTAL_MEM" -eq 0 ]; then
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echo "Failed to calculate memory size" >&2
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exit 1
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fi
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${pkgs.sysctl}/bin/sysctl -w vm.min_free_kbytes=$TOTAL_MEM
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'';
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};
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}
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