Author

Isaac Keslassy

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Preprint Oct 2026

Ofan: Optimal Load Balancing for AI Training

The extreme collective completion time (CCT) demands of AI workloads challenge existing packet spraying algorithms, which can have trouble efficiently load-balancing workloads that are sent at full line rates. We trace this to a structural cause: on a fat tree, once a packet picks its upward path, the downward path to...

Sarah McClure, E. Cohen, Jakob Krebs et al. · 0 citations

Jul 2026

CAPS: Fine-Tuning CCA Timing

The phase-locked steady state for dumbbell topologies under equal RTT, heterogeneous RTT, and bidirectional traffic is characterized, and the mechanism on a fat-tree under incast, permutation, and all-to-all traffic is validated.

Raphael Zailer, Isaac Keslassy · arXiv.org · 0 citations