● Covered by 1 source · 1 reportMedium impact
Meta Implements Open-Source Kernel Scheduler to Improve Ads Performance
Meta upgraded its ad service latency management by utilizing the open-source sched_ext framework. This change resulted in a 28% reduction in retrieval latency, improved ad ranking, and reduced energy consumption.
Key points
- 28% reduction in ads retrieval latency
- 3.28 MW power savings
- 1.1% increase in ads ranked
- Customized scheduling policy for ads workload
Introduction to Ads Latency
Meta's ads serving system manages over 5 million requests per second, totaling more than 400 billion daily. Latency is critical; reducing it enhances ad relevance and ROI for advertisers.
Challenges with Traditional Scheduling
Meta previously employed general-purpose Linux kernel schedulers, like CFS and EEVDF, which did not consider specific workload characteristics. This generic approach led to increased latency issues, particularly with the kernel upgrade to v6.9.
Development of sched_ext
To combat the latency problem, Meta partnered with sched_ext's developers to create a customized scheduling policy tailored for ads delivery. This BPF-based framework allows optimization by prioritizing latency-sensitive tasks specific to ads.
Results and Impact
The implementation of sched_ext resulted in a decrease in the 99th percentile latency by 28%, alongside a 3.28 MW power reduction. Moreover, there was a 1.1% increase in the number of ads ranked, demonstrating the effectiveness of workload-specific optimizations.
✨ This summary was generated by AI from the outlets' reporting listed below. It is not independently verified and may contain errors — check the original sources. How BrevFeed works →
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Reporting from
Meta upgraded its ad service latency management by utilizing the open-source sched_ext framework. This change resulted in a 28% reduction in retrieval latency, improved ad ranking, and reduced energy consumption.