Really proud to see the "sched_ext deadline server" landing upstream in Linux v7.0.
This is a big milestone for sched_ext, as it allows custom CPU schedulers to coexist with real-time tasks, making them viable for embedded & other real-time scenarios.
lore.kernel.org/all/aYmQyDHF...
Linux's sched_ext Has Plans For GPU Awareness, Energy-Aware Abstractions - https://www.phoronix.com/news/sched-ext-future-plans-2026
Video of my opening talk at the sched_ext microconference (LPC 2025), discussing open issues and future directions for sched_ext: deadline server, hierarchical schedulers, and built-in scheduler improvements.
www.youtube.com/watch?v=lQ26...
If you are attending LPC in Tokyo, you are welcome to join the sched_ext microconference tomorrow (Fri 12/12) at 3pm. We will cover recent developments, current status and upcoming features in the sched_ext framework.
Where: Hall B2
Schedule: lpc.events/event/19/ses...
The most noticeable feature is MCP server support, enabling AI agents such as Claude, Cursor, etc. to automate kernel development workflows, from quickly running commands/scripts inside rebuilt kernels to even performing automated bug bisection.
github.com/arighi/virtm...
That was cutting-edge! ⚙️
Thanks to Andrea Righi for exploring how AI-driven logic and Rust can make kernel scheduling more intelligent.
#RustLab2025 @arighi.bsky.social
As a hobby project I put a neural network in the Linux kernel scheduler using sched_ext and it actually works, at least for the workload it was trained on. :)
www.youtube.com/watch?v=ywW8...
virtme-ng v1.38 is out! This is a pretty stable update, bringing only bug fixes. Most notably, the infamous "Stale file handle" errors with virtiofsd are finally gone. If you've hit them before, you know how annoying they were, so time to update!
github.com/arighi/virtm...
It was a great honor to speak at @kernelrecipes.bsky.social again this year. This conference is always a rich source of inspiration, I'm going back home full of new ideas... and lots of work to do. :)
To all kernel folk: don't miss it next year! #kr2025
#kr2025 speakers team. Thanks for making this edition a great success again!
juming on the conclusion after nice aquarium demos. @arighi.bsky.social
@arighi.bsky.social to finalize this first day : Scheduling recipes
what the role of the scheduler, sched_ext project and interaction with BPF
kernel-recipes.org/en/2025/sche...
#kr2025
virtme-ng v1.37 has been released with the initial support for systemd. You can now test apps that depend on systemd inside the virtualized environment.
More info: github.com/arighi/virtm...
I'm excited to announce that the sched_ext microconference has been accepted for LPC 2025 in Tokyo - and the Call for Proposals is now open! #linuxplumbers
Dec 11–13 | Tokyo, Japan
Submit your topic: lpc.events/event/19/abs...
Details: lore.kernel.org/all/aH9NIL4C...
I'm quite shocked to see a user-space Rust scheduler (rustland) competing and, in some cases, even outperforming other BPF or in-kernel schedulers.
Big shoutout to the @cachyos.org community for constantly running all these benchmarks! It's great motivation to keep improving!
May the 4th be with your kernel tests, virtme-ng v1.34 is out!
In this new release: vsock SSH support (more lightweight guest connections), a better support for the s390 architecture and the usual set of bug fixes and improvements.
github.com/arighi/virtm...
Thanks! bpfland is still slightly better overall (I'll share a comparison too), but what's exciting IMHO is the potential that user-space scheduling brings, before it was held back by overhead, now that performance is comparable to in-kernel schedulers, it can open the door to new cool experiments
I've decided to revamp my Linux kernel scheduler in Rust, re-designing and improving the BPF <-> user-space pipeline, and found some interesting benchmark results (from the Phoronix test suite). User-space scheduling feels even more viable now. More info: arighi.blogspot.com/2025/05/reva...
Video of my talk at OSPM Summit 2025 on the current status and future plans for sched_ext:
www.youtube.com/watch?v=YxO4...
Me blabbing and demoing the new NUMA-aware features in the scx_bpfland scheduler
youtu.be/CootF9OtSRM
#linux #scheduling #sched_ext #bpf
virtme-ng v1.33 is available! Now you can run amd64 instances on non-x86 architectures (which means you can use arm64 as your kernel dev / testing platform with vng). Plus, more bug fixes and security improvements.
Check out the full changes here:
github.com/arighi/virtm...
Ubuntu 25.04 is now sched_ext ready arighi.blogspot.com/2025/02/ubun...
And my other talk at FOSDEM 2025 "Level up your Linux gaming: how sched_ext can save your fps" is also out: ftp.fau.de/fosdem/2025/...
Video of my talk at FOSDEM 2025 "Rust-ifying the Linux kernel scheduler (in user space)":
video.fosdem.org/2025/ub2252a...
There are some skips here and there in the recording, but they don't alter the content too much.
NVIDIA Engineer Talks Up sched_ext Linux Scheduler Possibilities At FOSDEM - https://www.phoronix.com/news/NVIDIA-Talks-Up-Sched-Ext
Day 2 at @fosdem.bsky.social - today talking about gaming on Linux and scheduling
fosdem.org/2025/schedul...
On my way to @fosdem.bsky.social to talk about Rust-ifying the Linux kernel scheduler fosdem.org/2025/schedul...
I'm happy to answer any sched_ext related questions and also show a live demo for those that are at FOSDEM 🙂
A short compilation of clips showing how sched_ext / scx_bpfland can mitigate the impact of background workloads and improve the gaming experience on Linux (featuring AAA games)
www.youtube.com/watch?v=ZuWy...
Video of my talk 'Designing Custom Linux Schedulers with sched_ext' for the Linux Foundation Mentorship Series. Hope you find it useful!
www.youtube.com/watch?v=jsLj...
