Author

Gabriele Castellano

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Preprint Oct 2026

MCCL: Measurement-based Collective Communication Library

Collective communication is a critical performance bottleneck in large-scale distributed training. Existing libraries and synthesis frameworks compute open-loop schedules once, assuming a static topology and peak link capacities. In production, however, persistent gray failures can silently degrade link throughput and...

Michele Ferrero, Gabriele Castellano, P. Medagliani et al. · 0 citations