I’m too old to rant about systemd :D

Wtf is run0

https://www.freedesktop.org/software/systemd/man/devel/run0.html

Edit: Is that nyx flake made by the same guys as the Chaotic AUR repo for arch?

Looks like it if you check from GitHub.

Thanks for sparking my interest on cachyos kernels and what they patch. In addition to bore, they also patch the sched_ext support!

https://github.com/CachyOS/linux-cachyos?tab=readme-ov-file#cachyos-default-kernel

Now, what this means is you can boot this kernel, then just start the scheduler from userland, e.g.

run0 scx_rustland

It uses bpf, so the scheduler switches immediately and is as fast as anything in the kernel space. What makes this rustland scheduler super interesting is how it can detect what application is currently active, and give it a full priority over anything else. So you can compile code in the background with all cores, and at the same time play a game with the best frame rate.

There are other sched_ext schedulers available, at least on nixos with the cachyos kernel I get a bunch of scx_ binaries to play with.

For nix users here, nyx flake packages and compiles the cachyos kernel:

https://github.com/chaotic-cx/nyx

They have a few in the main branch: https://github.com/NixOS/nixpkgs/tree/master/pkgs/os-specific/linux/kernel

I see rt and zen at least being available. Would of course be quite easy to just send them a PR for bore patches, but I think I wait for sched_ext to land instead…

Not until sched_ext lands, and you can then switch schedulers as you wish. Maybe in 6.12?

Me neither. But. I think the answer is much simpler here: Microsoft doesn’t make their money with schedulers, but bundling that Office and tracking to everybody, and charging rent every month. They have way less people working on making the kernel as fast as possible, compared to Linux where:

• there are many companies running crazy workloads 24/7, and providing patches
• very talented individual hackers who have an open source kernel and can play around with things, getting that last oomph out from their system

This is why, for a pro user, Linux is an amazing platform.

It’s pretty easy to patch the kernel in NixOS:

https://git.sr.ht/~pimeys/nixos/commit/2a023c5ccc8a499dcb4ea14b0ab52c33db3f3523

It definitely feels snappier even with my 5950x. I hope this lands to mainline soon, compiling kernel for every update takes a few minutes extra.

Not yet in the Torvalds tree of Linux? There’s a ton of interesting schedulers coming when sched_ext lands to the mainline:

https://www.phoronix.com/news/sched_ext-Ahead-Of-Linux-6.12

Also, would be great if more distros would compile packages with AVX512, there’s a ton of perf left on the table:

https://www.phoronix.com/review/linux-os-amd-ryzen9-9950x

Yeah, same with the next gen zen5 laptops. The Ryzen 9950x can compile code faster and by using less power compared to 7950x. It is going to be awesome for dev laptop performance and battery use.

Meanwhile these CPUs are amazing on Linux

https://www.phoronix.com/review/amd-ryzen-9950x-9900x

https://www.phoronix.com/review/amd-zen5-avx-512-9950x

For some reason Windows scheduler is not as good as the one found in the Linux kernel with the zen5.

The article said nothing and there was one still image.

Wake me up when they have video from the gameplay.