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Zhihao Bai

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OpGuard: Bitwise Alignment for Precise and General Debugging of Production LLM Training20th USENIX Symposium on Operating Systems Design and Implementation (OSDI '26)2026-07-13
Claims a practical system, OpGuard, that uses bitwise alignment—lightweight per-op fingerprints plus a schedule-tolerant mapper that finds the longest prefix…
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MegaScale: Scaling Large Language Model Training to More Than 10,000 GPUs21st USENIX Symposium on Networked Systems Design and Implementation (NSDI '24)2024-04-16
MegaScale is a production system that trains LLMs on more than 10,000 GPUs and achieves concrete gains: 55.2% Model FLOPs Utilization when training a 175B…
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Transparent GPU Sharing in Container Clouds for Deep Learning WorkloadsNSDI 20232023-04-17
Claims a kernel‑intercept OS layer called TGS that enables transparent GPU sharing under Docker/Kubernetes with ~3000 LOC, adaptive rate control and…
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DistCache: Provable Load Balancing for Large-Scale Storage Systems with Distributed CachingUSENIX ATC '192019-07-10
DistCache splits a single hot-cache into many small nodes, allocating hot items with two independent hash functions and routing queries with the…
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