Multi-Port All-to-All Communications in Two-Level Fully Connected Network Topology

Kien Trung Pham, Truong Thao Nguyen, Michihiro Koibuchi


Network topology and communication algorithms are two components that directly affect the performance of applications on supercomputers. In this work, we use two-level fully connected (2lvfc) as the scalable network topology that works for the next generation of supercomputers. 2lvfc is a regular 2-dimension topology. 2lvfc is isomorphic with 2D HyperX or diameter-two Dragonfly networks. We also propose three algorithms to execute all-to-all collective operation on 2lvfc.

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