Linux Kernel with several scheduler and other improvements

General Information

CachyOS are improved kernels that improve performance and other aspects. The Schedulers listed below are supported:

linux-cachyos will now use as default the BORE scheduler!

• Standard Scheduler Completely Fair Scheduler (CFS) - linux-cachyos-cfs
• CacULE and CacULE-RDB created from Hamad Marri, maintained by CachyOS - linux-cachyos-cacule / linux-cacule / linux-cacule-rdb (with the rdb balancer)
• BitMap Queue (BMQ) Alfred Chen Scheduler - linux-cachyos-bmq
• Priority and Deadline based Skiplist multiple queue scheduler (PDS) - Alfred Chen Scheduler » linux-cachyos-pds
• Task Type Scheduler by Hamad Marri (TT) - linux-cachyos-tt / linux-tt
• BORE (Burst-Oriented Response Enhancer) CPU Scheduler by firelzrd (BORE) - linux-cachyos-bore / linux-cachyos

All kernels are prebuilt in two different march versions (x86_64 and x86_64_v3) and also with the lto enabled kernels in the cachyos repo.

Features

• Very customizable PKGBUILD with many features and improvements
• 5 Different scheduler are supported, CacULE-,CFS-,tt-,bmq-,bore-, and pds scheduler
• GCC/CLANG Optimization with automatically found cpu arch or also selectable cpu arch
• Choose between LLVM/LTO or GCC
• Choose between 300Hz, 500Hz, 600 Hz ,750Hz and 1000Hz # default 750 Hz
• Improved BFQ Scheduler
• Back-ported patches from linux-next
• General improved sysctl settings and upstream scheduler fixes
• Latest LRU-le9 Patch-set, default enabled
• DAMON Proactive-LRU-lists-Sorting DAMON_RECLAIM and DAMON_LRU_SORT
• BBRv2 tcp_congestion_control
• LLVM LTO Kernels prebuilt in x86-64-v3 and x86-64 in the CachyOS repo
• LRNG Framework (default enabled)
• Latest & improved ZSTD patch-set
• Latest BTRFS improvements & fixes
• KSMBD Module for Samba3 Server
• AMD PSTATE Driver enabled by default and with enhancements patches/fixes
• Clearlinux Patchset
• Kernel Control Flow Integrity (kCFI) selectable when using LLVM(patched llvm can be found in the cachyos-repo)
• ZFS Filesystem Support and prebuilt in the repo!
• WINESYNC Fastsync
• Use entropy optimization for zram
• UserKSM daemon from pf
• support for bcachefs (default compiled in cachyos-repo)

WINESYNC Usage:

Install following packages from the AUR, if you get into issues:

• winesync-udev-rule

And disable following enviroment variables in lutris/steam/..

WINEESYNC=0
WINEFSYNC=0
WINEFSYNC_FUTEX2=0

for steam following in the launch options:

WINEESYNC=0 WINEFSYNC=0 WINEFSYNC_FUTEX2=0 %command%

You'll also need a wine/proton with the winesync patch. I build a proton-tkg-git and a wine-tkg-git into the cachyos-repo once a week with winesync Fastsync Simply install it with sudo pacman -S proton-tkg-git wine-tkg-git or you built it your self from wine-tkg. ## Currently fastsync seems not to work

Other distros

• First I will release every kernel update with a complete patch for every scheduler and their config.
• Next I will implement a building system so it is possible to build the kernel for several distros.
• Maybe I will provide some releases for debian based distros.

We are providing a repo which includes all kernels in generic-v3 and generic and more optimized packages

How to add our repo automatically with CPU detection (if x86-64-v3 is supported)

Just run following command:

automatic march detection and changing the pacman.conf:

wget https://mirror.cachyos.org/cachyos-repo.tar.xz
tar xvf cachyos-repo.tar.xz
cd cachyos-repo
sudo ./cachyos-repo.sh

--

manually:

sudo pacman-key --recv-keys F3B607488DB35A47 --keyserver keyserver.ubuntu.com

sudo pacman-key --lsign-key F3B607488DB35A47

sudo pacman -U 'https://mirror.cachyos.org/repo/x86_64/cachyos/cachyos-keyring-2-1-any.pkg.tar.zst' 'https://mirror.cachyos.org/repo/x86_64/cachyos/cachyos-mirrorlist-13-1-any.pkg.tar.zst' 'https://mirror.cachyos.org/repo/x86_64/cachyos/cachyos-v3-mirrorlist-13-1-any.pkg.tar.zst'

  **Checking x86_64_v3 cpu support:**

  /lib/ld-linux-x86-64.so.2 --help | grep "x86-64-v3 (supported, searched)"

  if you get an output change at the /etc/pacman.conf following:
  ```
  #Architecture = auto
  Architecture = x86_64 x86_64_v3
  ```
  add following under the arch repos the "-v3" repos only if they are supported:
  ```
  # cachyos repos
  [cachyos-v3]
  Include = /etc/pacman.d/cachyos-v3-mirrorlist
  [cachyos]
  Include = /etc/pacman.d/cachyos-mirrorlist

This script will also backup your old pacman.conf.

This script will auto-detect you architecture, if your CPU have x86-64-v3 support, it will automatically use the repos which are optimized with this flag and some other flags.

Also all provided Kernels, Browsers, ... are optimized and compiled.

## How to Backup the config and use the native Arch Packages

- Remove or Backup the config located at /etc/pacman.conf
- then run `sudo mv /etc/pacman.conf.bak /etc/pacman.conf`
- Then run following command to switch the packages to the default arch packages `sudo pacman -Suuy`


More information's you will find here [CachyOS](https://github.com/cachyos) or [Discord](https://discord.gg/k39qfrxPNa)

How to use CLANG/LLVM/LTO compiled Kernels on Nvidia driver with DKMS:

Not needed anymore, just install the latest dkms version (3.0.2).

Support

You can join the CachyOS Discord with the following link:

https://discord.gg/qJqj94uFwE

or at telegram:

https://t.me/+zCzPX4cAFjk1MTYy

Donations are welcome for the compile server for the repo or a cup of coffee for maintain this repo

https://paypal.me/pttrr

https://www.patreon.com/CachyOS

Valueable Contributors

SirLucjan (Piotr Gorski)

Hamad Marri for the CacULE Scheduler

Archlinux for the great linux operating system

And all other Kernel Developers and Supporters