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CachyOS

CachyOS provides enhanced kernels that offer improved performance and other benefits.

• General Information about kernels
  • linux-cachyos
  • Features
• CachyOS repositories
  • How to add CachyOS repositories
  • Check CPU compatibility
  • Uninstalling CachyOS repositories
  • Install SCX schedulers
• Other GNU/Linux distributions
  • Gentoo
  • Fedora
  • NixOS
• Support

We have provided all these CPU schedulers because each scheduler performsdifferently depending on usage. We recommend testing each one to determinewhich best suits your specific requirements.

• (BORE)Burst-Oriented ResponseEnhancer Scheduler byfirelzrdlinux-cachyos /linux-cachyos-bore

• (EEVDF)Earliest Eligible VirtualDeadline -linux-cachyos-eevdf

• (BMQ)BitMap queue CPUScheduler Scheduler byAlfred Chen -linux-cachyos-bmq

• Very customizable PKGBUILD with many features and improvements.
• Auto detection of CPU architecture and setting the appropriate compiler flags.
• Support for building with GCC or Clang.
• Choose between 300Hz, 500Hz, 600 Hz ,750Hz and 1000Hz. Defaults to 1000Hz
• Kernel Control Flow Integrity (kCFI) selectable when usingLLVM
• Support for generating and using AutoFDO profiles, which is a PGO-likeoptimization. See more:https://cachyos.org/blog/2411-kernel-autofdo/

• 3 different scheduler are supported:BORE,EEVDF andBMQ scheduler
• AMD P-State Preferred Core / amd-pstate enhancements and fixes fromlinux-next.
• Support for RT kernel builds with BORE
• Cachy SauceCONFIG_CACHY, enables various tweaks for the scheduler and other settings
• Includes patches to improve performance of CRC32 and AES128 crypto.

• ZFS Filesystem support and pre-built modules for our kernels in the repository
• Support for building NVIDIA modules with some patches. Ready modules forbinary kernel builds can be found in the repository.
• Latest & improved ZSTD 1.5.6 patch-set
• KSM patch for proper working of uksmd daemon from pf
• Memory management tweaks from zen-kernel (compaction, watermark)

• Cherry-picked Clear Linux patches
• Back-ported patches fromlinux-next
• ACS Override support
• AMDGPU: Allow override of min_powercap withamdgpu_ignore_min_pcap
• Steam Deck Patches included - Audio, HW Quirks, HID
• Rog Ally patches included
• v4l2loopback modules as default included
• HDR support enabled
• Various GCC Optimization flags applied (-fivopts -fmodulo-sched)
• NTSync module support (NTSYNC=m)
• T2 Macbook support as default included

The repositories contain both Arch Linux and CachyOS packages, which have beenre-built with flags optimized for performance, stability, and security.

• znver4 - Dedicated Zen4 optimized repository used for Zen 4 and Zen 5 CPUs
• x86-64-v4 - all Arch Linux packages with enhanced compilation flags
• x86-64-v3 - all Arch Linux packages with enhanced compilation flags
• x86-64 - currently only kernel packages

We've made it easy for you! Simply run the following commands to use our helperscript that does all the work for you. 😉

Run the following commands:

1. Get archive with script

curl -O https://mirror.cachyos.org/cachyos-repo.tar.xz

2. Extract and enter into the archive

tar xvf cachyos-repo.tar.xz && cd cachyos-repo

3. Run script with sudo

sudo ./cachyos-repo.sh

1. Script will auto-detect CPU architecture, if CPU hasx86-64-v4 orx86-64-v3support, script will automatically use the repositories, which are optimizedwith this flag and some other flags.

2. Script will backup your oldpacman.conf.

For more information, check out ourGitHub orjoin ourDiscord community.

1. Add CachyOS signing keys

sudo pacman-key --recv-keys F3B607488DB35A47 --keyserver keyserver.ubuntu.comsudo pacman-key --lsign-key F3B607488DB35A47

2. Install required packages

sudo pacman -U 'https://mirror.cachyos.org/repo/x86_64/cachyos/cachyos-keyring-20240331-1-any.pkg.tar.zst' \    'https://mirror.cachyos.org/repo/x86_64/cachyos/cachyos-mirrorlist-18-1-any.pkg.tar.zst' \    'https://mirror.cachyos.org/repo/x86_64/cachyos/cachyos-v3-mirrorlist-18-1-any.pkg.tar.zst' \    'https://mirror.cachyos.org/repo/x86_64/cachyos/cachyos-v4-mirrorlist-6-1-any.pkg.tar.zst' \    'https://mirror.cachyos.org/repo/x86_64/cachyos/pacman-7.0.0.r6.gc685ae6-3-x86_64.pkg.tar.zst'

If you want to go back to the Arch Linux repositories and had our version ofpacman installed, you will need to run the following command after the rollbackto avoid getting%INSTALLED_DB% warnings:

sudo find /var/lib/pacman/local/ -type f -name "desc" -exec sed -i '/^%INSTALLED_DB%$/,+2d' {} \;

If you want to add our repositories manually, you must check the compatibilityof the CPU with cachyos repositories.

/lib/ld-linux-x86-64.so.2 --help | grep supported

Pay attention to the following text with brackets.(supported, searched)

• If you seex86-64-v4 (supported, searched), that means theCPU iscompatible and can usex86-64-v4 instruction set.

• If you seex86-64-v4, that means theCPU is incompatible and can't usex86-64-v4 instruction set.

> /lib/ld-linux-x86-64.so.2 --help | grep supported  x86-64-v4 (supported, searched)  x86-64-v3 (supported, searched)  x86-64-v2 (supported, searched)

You need to editpacman.conf and add repositories.

sudo nano /etc/pacman.conf

# cachyos repos[cachyos]Include = /etc/pacman.d/cachyos-mirrorlist

# cachyos repos## Only add if your CPU does v3 architecture[cachyos-v3]Include = /etc/pacman.d/cachyos-v3-mirrorlist[cachyos-core-v3]Include = /etc/pacman.d/cachyos-v3-mirrorlist[cachyos-extra-v3]Include = /etc/pacman.d/cachyos-v3-mirrorlist[cachyos]Include = /etc/pacman.d/cachyos-mirrorlist

# cachyos repos## Only add if your CPU does support x86-64-v4 architecture[cachyos-v4]Include = /etc/pacman.d/cachyos-v4-mirrorlist[cachyos-core-v4]Include = /etc/pacman.d/cachyos-v4-mirrorlist[cachyos-extra-v4]Include = /etc/pacman.d/cachyos-v4-mirrorlist[cachyos]Include = /etc/pacman.d/cachyos-mirrorlist

Finally, update your system with CachyOS packages:

sudo pacman -Syu

Enjoy improved system speed with CachyOS packages!

This is handled via debuginfod. Just add following file to/etc/debuginfod/cachyos.urls

https://debuginfod.cachyos.org

SeeUninstalling Cachyos Repositories

Seesched-ext Tutorial

• Complete patch for simple patching on the kernel

• It is planned to implement into our kernel builder from cachyos buildsystem,which works also on other distributions.

Its a community maintained ebuild from a user, which can be used for a dynamicbuilding righthere

Or simply run:

eselect repository add CachyOS-kernels git https://github.com/Szowisz/CachyOS-kernelsemaint sync -r CachyOS-kernels

Port of kernel linux-cachyos-bore, linux-cachyos-rt-bore, linux-cachyos-bore-lto and linux-cachyos-lts bybieszczaders

Visit theCOPR page for installation instructions and the latest announcements.

Nyx does provide a precompiled CachyOS Kernel and a bunch of other interesting packages. This repository is maintained bychaotic-aurJust follow thisREADME

Discord:https://discord.gg/cachyos-862292009423470592
Forum:https://discuss.cachyos.org
Telegram:https://t.me/+zCzPX4cAFjk1MTYy
Matrix:https://matrix.cachyos.org

PayPal:https://paypal.me/pttrr
Patreon:https://www.patreon.com/CachyOS
BTC: bc1qmwglfchlc335du6pcu6w64cexu7cck0mzhyw42
ETH: 0xc2dc77327F78A7B85Db3941Eb49e74F41E961649
LTC: LgGTwcEBcXqMgNT6XyyNWABMb7dZVtVg9w

firelzrd for the BORE Scheduler
Arch Linux for the great linux operating system
And all other Kernel Developers and Supporters