Skywalk: A topology for HPC networks with low-delay switches

Ikki Fujiwara, Michihiro Koibuchi, Hiroki Matsutani, Henri Casanova

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Citations (Scopus)

Abstract

With low-delay switches on the horizon, end-to-end latency in large-scale High Performance Computing (HPC) interconnects will be dominated by cable delays. In this context we define a new network topology, Skywalk, for deploying low-latency interconnects in upcoming HPC systems. Skywalk uses randomness to achieve low latency, but does so in a way that accounts for the physical layout of the topology so as to lead to further cable length and thus latency reductions. Via graph analysis and discrete-event simulation we show that Skywalk compares favorably (in terms of latency, cable length, and throughput) to traditional low-degree torus and moderate-degree hypercube topologies, to high-degree fully-connected Dragonfly topologies, to the HyperX topology, and to recently proposed fully random topologies.

Original languageEnglish
Title of host publicationProceedings - IEEE 28th International Parallel and Distributed Processing Symposium, IPDPS 2014
PublisherIEEE Computer Society
Pages263-272
Number of pages10
ISBN (Print)9780769552071
DOIs
Publication statusPublished - 2014
Event28th IEEE International Parallel and Distributed Processing Symposium, IPDPS 2014 - Phoenix, AZ, United States
Duration: 2014 May 192014 May 23

Publication series

NameProceedings of the International Parallel and Distributed Processing Symposium, IPDPS
ISSN (Print)1530-2075
ISSN (Electronic)2332-1237

Other

Other28th IEEE International Parallel and Distributed Processing Symposium, IPDPS 2014
CountryUnited States
CityPhoenix, AZ
Period14/5/1914/5/23

Keywords

  • Interconnection network
  • cabinet layout
  • high performance computing
  • network topology

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Computer Networks and Communications
  • Hardware and Architecture
  • Software

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