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RailWave: Adaptive Spatial and Temporal Scheduling for Expert-Parallel Communication

Wang, Chutian et al.
arXiv (All) · Papers
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Irregular All-to-All communication is a major bottleneck in expert-parallel Mixture-of-Experts (MoE) models. Even with fixed expert routing and placement, uneven utilization of parallel network Rails and incast can limit communication performance. We present RailWave, a phase-adaptive communication
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