this post was submitted on 23 Dec 2025
144 points (99.3% liked)

Linux

10779 readers
358 users here now

A community for everything relating to the GNU/Linux operating system (except the memes!)

Also, check out:

Original icon base courtesy of lewing@isc.tamu.edu and The GIMP

founded 2 years ago
MODERATORS
Ategon@programming.dev
anzo@programming.dev
dwraf_of_ignorance@programming.dev
144
Meta Is Using The Linux Scheduler Designed For Valve's Steam Deck On Its Servers (www.phoronix.com)
submitted 2 days ago by cm0002@infosec.pub to c/linux@programming.dev
3 comments fedilink hide all child comments
 

An interesting anecdote from this month's Linux Plumbers Conference in Tokyo is that Meta (Facebook) is using the Linux scheduler originally designed for the needs of Valve's Steam Deck... On Meta Servers. Meta has found that the scheduler can actually adapt and work very well on the hyperscaler's large servers.

SCX-LAVD as the Latency-criticality Aware Virtual Deadline scheduler has worked out very well for the needs of Valve's Steam Deck with similar or better performance than EEVDF. SCX-LAVD has been worked on by Linux consulting firm Igalia under contract for Valve. SCX-LAVD has also seen varying use by the CachyOS Handheld Edition, Bazzite, and other Linux gaming software initiatives.

top 3 comments
sorted by: hot top controversial new old
[–] s08nlql9@sopuli.xyz 4 points 2 days ago (1 children)

Need to research what a scheduler means but all can think of is something like cron

[–] towerful@programming.dev 43 points 2 days ago* (last edited 2 days ago)

In my experience, a Scheduler is something that schedules time on the CPU for processes (threads).

So 10 processes (threads) say "I need to do something":
2 of those threads are "ready to continue" because they were previously waiting on some Disk IO (and responsibly released thread control while data was fetched).
1 of the threads says "this is critical for GPU operations".
1 of those threads self declares it is elevated priority.

The scheduler decides which of those threads actually gets time on an available CPU core to be processed.

[–] ulterno@programming.dev 3 points 2 days ago

Really interesting. Perhaps we can try running it on normal PCs too to see what it does.
Oh, and on RISC V stuff.