95 lines
2.4 KiB
Nix
95 lines
2.4 KiB
Nix
{
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config,
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lib,
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pkgs,
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...
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}:
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{
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imports = [ ];
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nix.settings.system-features = lib.mkForce [
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"gccarch-znver4"
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"gccarch-skylake"
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# "gccarch-alderlake" missing WAITPKG
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"gccarch-x86-64-v3"
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"gccarch-x86-64-v4"
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"benchmark"
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"big-parallel"
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"kvm"
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"nixos-test"
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];
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# nixpkgs.hostPlatform = {
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# gcc.arch = "znver4";
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# gcc.tune = "znver4";
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# system = "x86_64-linux";
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# };
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nixpkgs.overlays = [
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(
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self: super:
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let
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optimizeWithFlags =
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pkg: flags:
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pkg.overrideAttrs (old: {
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NIX_CFLAGS_COMPILE = [ (old.NIX_CFLAGS_COMPILE or "") ] ++ flags;
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});
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in
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{
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# linux
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# linux_6_11
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# linux_zen
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linux_znver4 = optimizeWithFlags super.linux_6_11 [
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"-march=znver4"
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"-mtune=znver4"
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];
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}
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)
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# (
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# self: super:
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# let
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# optimizeWithFlags =
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# pkg: flags:
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# pkg.overrideAttrs (old: {
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# NIX_CFLAGS_COMPILE = [ (old.NIX_CFLAGS_COMPILE or "") ] ++ flags;
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# });
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# addConfig =
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# additionalConfig: pkg:
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# pkg.override (oldconfig: {
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# structuredExtraConfig = pkg.structuredExtraConfig // additionalConfig;
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# });
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# in
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# {
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# linux_znver4 =
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# addConfig
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# {
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# # CPUFreq governor Performance
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# CPU_FREQ_DEFAULT_GOV_PERFORMANCE = lib.mkOverride 60 lib.kernel.yes;
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# CPU_FREQ_DEFAULT_GOV_SCHEDUTIL = lib.mkOverride 60 lib.kernel.no;
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# # Full preemption
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# PREEMPT = lib.mkOverride 60 lib.kernel.yes;
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# PREEMPT_VOLUNTARY = lib.mkOverride 60 lib.kernel.no;
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# # Google's BBRv3 TCP congestion Control
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# TCP_CONG_BBR = lib.kernel.yes;
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# DEFAULT_BBR = lib.kernel.yes;
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# # Preemptive Full Tickless Kernel at 250Hz
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# HZ = lib.kernel.freeform "250";
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# HZ_250 = lib.kernel.yes;
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# HZ_1000 = lib.kernel.no;
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# }
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# (
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# optimizeWithFlags super.linux_6_11 [
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# "-march=znver4"
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# "-mtune=znver4"
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# ]
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# );
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# }
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# )
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];
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boot.kernelPackages = lib.mkIf (!config.me.buildingIso) (pkgs.linuxPackagesFor pkgs.linux_znver4);
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}
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