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

- Company: Meta (meta.com)
- Announced: 2026-07-13T16:00:50+00:00
- Category: capability-change
- Subject: Llama / infrastructure
- Source: https://engineering.fb.com/2026/07/13/ml-applications/modernizing-the-meta-ads-service-with-an-open-source-kernel-scheduler/
- Record: https://forck.live/items/1422-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.

## Evidence

Verbatim from https://engineering.fb.com/2026/07/13/ml-applications/modernizing-the-meta-ads-service-with-an-open-source-kernel-scheduler/:

> 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

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Record: https://forck.live/items/1422-modernizing-the-meta-ads-service-with-an-open-source-kernel-scheduler
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