Meta· Llama / infrastructureCapability change

Modernizing the Meta Ads Service With an Open-Source Kernel Scheduler

Meta used sched_ext to build a custom scheduling policy for the Ads service, resulting in a 28% reduction in ads retrieval stage tail latency, 3.28 MW power savings, and a 1.1% increase in ads ranked.

From the source

The result: a 28% reduction in ads retrieval stage tail(99th percentile) latency, 3.28 megawatts(MW) power saving, and a 1.1% increase in the number of ads ranked

engineering.fb.com

Announced

13 Jul 2026 16:00 UTC

Detected

03 Aug 2026 21:12 UTC (+21d after)