Meta Is Using The Linux Scheduler Designed For Valve's Steam Deck On Its Servers

Meta Is Using The Linux Scheduler Designed For Valve's Steam Deck On Its 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. It turns out that besides working well on handhelds, SCX-LAVD can also end up working well on large servers too. The presentation at LPC 2025 by Meta engineers was in fact titled " How do we make a Steam Deck scheduler work on large servers ." At Meta they have explored SCX_LAVD as a "default" fleet scheduler for their servers that works for a range of hardware and use-cases for where they don't need any specialized scheduler. They call this scheduler built atop sched_ext as "Meta's New Default Scheduler". LAVD they found to work well across the growing CPU and memory configurations of their servers, nice load balancing between CCX/LLC boundaries, and more. Those wishing to learn more about Meta's use and research into SCX-LAVD can find the Linux Plumbers Conference presentation embedded below along with the slide deck .

Preview: ~214 words