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DualColl: Throughput-Optimal Bandwidth-Bound Collective Communications via Fractional Tree Packing

Ballan, Namir et al.
arXiv (All) · Papers
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and-cluster-computingdata-structures-and-algorithmsdistributednetworking-and-internet-architectureparallel
Large-scale distributed training increasingly makes collective communication bandwidth-bound. In modern GPU clusters, communication libraries such as NCCL implement collectives including AllReduce over heterogeneous interconnects such as NVLink, InfiniBand, and Ethernet, making efficient use of avai
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