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hw/gaming: integrate cachyos sysctl and udev rules
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Aly Raffauf 2024-12-19 23:53:11 -05:00
parent 4b888f0a8e
commit c798fc116a
1 changed files with 24 additions and 22 deletions
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46
hwModules/common/gaming/default.nix
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@ -6,39 +6,47 @@
boot = {
kernel.sysctl = {
# Improved file monitoring
"fs.file-max" = lib.mkDefault 2097152; # Set size of file handles and inode cache
"fs.inotify.max_user_instances" = lib.mkOverride 100 8192; # Re-use the default from Bazzite even though the default NixOS value is higher.
# "fs.inotify.max_user_watches" = lib.mkOverride 100 524288;
# Disable watchdogs for maximum performance at the cost of resiliency
"kernel.nmi_watchdog" = lib.mkOverride 100 0;
"kernel.soft_watchdog" = lib.mkDefault 0;
# "kernel.split_lock_mitigate" = lib.mkOverride 100 0;
"kernel.watchdog" = lib.mkDefault 0;
"kernel.nmi_watchdog" = lib.mkOverride 100 0; # Disable watchdogs for maximum performance at the cost of resiliency
"kernel.sched_cfs_bandwidth_slice_u" = lib.mkDefault 3000;
"kernel.sched_latency_ns" = lib.mkDefault 3000000;
"kernel.sched_min_granularity_ns" = lib.mkDefault 300000;
"kernel.sched_wakeup_granularity_ns" = lib.mkDefault 500000;
"kernel.sched_migration_cost_ns" = lib.mkDefault 50000;
"kernel.sched_min_granularity_ns" = lib.mkDefault 300000;
"kernel.sched_nr_migrate" = lib.mkDefault 128;
"kernel.sched_wakeup_granularity_ns" = lib.mkDefault 500000;
"kernel.soft_watchdog" = lib.mkDefault 0;
"kernel.split_lock_mitigate" = lib.mkDefault 0;
"kernel.unprivileged_userns_clone" = lib.mkDefault 1;
"kernel.watchdog" = lib.mkDefault 0;
# Network optimizations
"net.core.default_qdisc" = lib.mkDefault "fq";
"net.core.netdev_max_backlog" = lib.mkDefault 16384; # Increase netdev receive queue
"net.ipv4.tcp_congestion_control" = lib.mkDefault "bbr";
"net.ipv4.tcp_ecn" = lib.mkDefault 1;
"net.ipv4.tcp_fastopen" = lib.mkDefault 3;
"net.ipv4.tcp_fin_timeout" = lib.mkDefault 5;
"net.ipv4.tcp_mtu_probing" = lib.mkForce 1;
"net.ipv4.tcp_rfc1337" = lib.mkDefault 1; # Protect against tcp time-wait assassination hazards, drop RST packets for sockets in the time-wait state. Not widely supported outside of Linux, but conforms to RFC.
"net.ipv4.tcp_slow_start_after_idle" = 0; # Disable TCP slow start after idle
"net.ipv4.tcp_timestamps" = lib.mkDefault 0; # https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux_for_real_time/7/html/tuning_guide/reduce_tcp_performance_spikes
# Memory management
"vm.dirty_background_bytes" = lib.mkDefault 134217728;
"vm.dirty_bytes" = lib.mkDefault 268435456;
# "vm.max_map_count" = lib.mkOverride 100 2147483642;
"vm.dirty_writeback_centisecs" = lib.mkDefault 1500;
"vm.max_map_count" = lib.mkOverride 100 2147483642;
"vm.page-cluster" = lib.mkDefault 0;
"vm.swappiness" = lib.mkDefault 180;
"vm.swappiness" = lib.mkDefault 150;
"vm.vfs_cache_pressure" = lib.mkDefault 50;
"vm.watermark_boost_factor" = lib.mkDefault 0;
"vm.watermark_scale_factor" = lib.mkDefault 125;
};
kernelModules = ["ntsync"];
kernelPackages = pkgs.linuxPackages_cachyos;
};
@ -128,18 +136,12 @@
};
udev.extraRules = ''
# Significantly improved I/O performance
## SSD
ACTION=="add|change", KERNEL=="sd[a-z]", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="kyber"
## NVME
ACTION=="add|change", KERNEL=="nvme[0-9]n[0-9]", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="kyber"
## MicroSD
ACTION=="add|change", KERNEL=="mmcblk[0-9]p[0-9]", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="bfq"
## HDD
ACTION=="add|change", KERNEL=="sd[a-z]", ATTR{queue/rotational}=="1", ATTR{queue/scheduler}="bfq"
ACTION=="add|change", KERNEL=="mmcblk[0-9]p[0-9]", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="bfq" # SD cards use BFQ scheduler.
ACTION=="add|change", KERNEL=="nvme[0-9]n[0-9]", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="kyber" # NVMe use kyber scheduler.
ACTION=="add|change", KERNEL=="sd[a-z]", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="kyber" # SSD use kyber scheduler.
ACTION=="add|change", KERNEL=="sd[a-z]", ATTR{queue/rotational}=="1", ATTR{queue/scheduler}="bfq" # HHDs use BFW scheduler.
DEVPATH=="/devices/virtual/misc/cpu_dma_latency", OWNER="root", GROUP="audio", MODE="0660" # cpu_dma_latency writeable by audio group
KERNEL=="ntsync", MODE="0644" # /dev/ntsync user writeable
'';
};