A Case for Uni-directional Network Topologies in Large-Scale Clusters

Michihiro Koibuchi, Tomohiro Totoki, Hiroki Matsutani, Hideharu Amano, Fabien Chaix, Ikki Fujiwara, Henri Casanova

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

Designing low-latency network topologies of switches is a key objective for next-generation large-scale clusters. Low latency is preconditioned on low hop counts, but existing network topologies have hop counts much larger than theoretical lower bounds. To alleviate this problem, we propose building network topologies based on uni-directional graphs that are known to have hop counts close to theoretical lower bounds. A practical difficulty with uni-directional topologies is switch-by-switch flow control, which we resolve by using hot-potato routing. Cycle-Accurate network simulation experiments for various traffic patterns on uni-directional topologies show that hot-potato routing achieves performance comparable to that of conventional deadlock-free routing. Similar experiments are used to compare several uni-directional topologies to bi-directional topologies, showing that the former achieve significantly lower latency and higher throughput. We quantify end-To-end application performance for parallel application benchmarks via discrete-even simulation, showing that uni-directional topologies can lead to large application performance improvements over their bi-directional counterparts. Finally, we discuss practical issues for uni-directional topologies such as cabling complexity and cost, power consumption, and soft-error tolerance. Our results make a compelling case for considering uni-directional topologies for upcoming large-scale clusters.

本文言語English
ホスト出版物のタイトルProceedings - 2017 IEEE International Conference on Cluster Computing, CLUSTER 2017
出版社Institute of Electrical and Electronics Engineers Inc.
ページ178-187
ページ数10
ISBN(電子版)9781538623268
DOI
出版ステータスPublished - 2017 9 22
イベント2017 IEEE International Conference on Cluster Computing, CLUSTER 2017 - Honolulu, United States
継続期間: 2017 9 52017 9 8

出版物シリーズ

名前Proceedings - IEEE International Conference on Cluster Computing, ICCC
2017-September
ISSN(印刷版)1552-5244

Other

Other2017 IEEE International Conference on Cluster Computing, CLUSTER 2017
国/地域United States
CityHonolulu
Period17/9/517/9/8

ASJC Scopus subject areas

  • ソフトウェア
  • ハードウェアとアーキテクチャ
  • 信号処理

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