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OrbitFlow: SLO-Aware Long-Context LLM Serving with Fine-Grained KV Cache Reconfiguration
arXiv β CS AI|Xinyue Ma, Heelim Hong, Taegeon Um, Jongseop Lee, Seoyeong Choy, Woo-Yeon Lee, Myeongjae Jeon||4 views
π€AI Summary
OrbitFlow is a new KV cache management system for long-context LLM serving that uses adaptive memory allocation and fine-grained optimization to improve performance. The system achieves up to 66% better SLO attainment and 3.3x higher throughput by dynamically managing GPU memory usage during token generation.
Key Takeaways
- βOrbitFlow addresses memory management challenges in long-context LLM serving through adaptive KV cache placement decisions.
- βThe system uses a lightweight ILP solver to optimize which layers' KV caches remain on GPU within memory constraints.
- βPerformance improvements include up to 66% better TPOT SLO attainment and 48% better TBT SLO attainment.
- βThe system achieves 38% reduction in 95th percentile latency and up to 3.3x higher throughput compared to existing methods.
- βOrbitFlow includes a fallback mechanism that temporarily defers high-memory requests during heavy load periods.
Read Original βvia arXiv β CS AI
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