Author

Yi-Hao Zhang

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Preprint Oct 2026

A Distributed View from a Single GPU: RankLens for Distributed Training

Modern distributed training is costly to debug, tune, and analyze because faithful analysis often requires repeated target-scale executions. We observe that many analysis tasks depend on the original distributed execution path, but not on full all-rank execution. We present RankLens, a single-rank emulation system that...

Yu-Fan Wang, Yi-Hao Zhang, Yi Liu · 0 citations