Augmenting low-latency HPC network with free-space optical links

Ikki Fujiwara, Michihiro Koibuchi, Tomoya Ozaki, Hiroki Matsutani, Henri Casanova

研究成果: Conference contribution

25 被引用数 (Scopus)

抄録

Various network topologies can be used for deploying High Performance Computing (HPC) clusters. The network topology, which connects switches In cabinets on a machine room floor, is typically defined once and for all at system deployment time. For a diverse application workload, there are downsides to having a single wired topology. In this work, we propose using free-space optics (FSO) in large-scale systems so that a diverse application workload can be better supported. A high-density layout of FSO terminals on top of the cabinets is determined that allows line-of-sight communication between arbitrary cabinet pairs. We first show that our proposal reduces both end-to-end network latency and total cable length when compared to a wired topology. We then demonstrate that the use of FSO links improves the embedding/partitioning capabilities of a wired topology. More specifically, we show that a recently proposed random low-latency topology can be augmented with a reasonable number of FSO links to support multiple k-ary n-cube and fat tree embedded topologies. Finally, we investigate power-aware on/off link regulation techniques and show how adding/reconfiguring FSO links leads to both performance and power efficiency improvements.

本文言語English
ホスト出版物のタイトル2015 IEEE 21st International Symposium on High Performance Computer Architecture, HPCA 2015
出版社Institute of Electrical and Electronics Engineers Inc.
ページ390-401
ページ数12
ISBN(電子版)9781479989300
DOI
出版ステータスPublished - 2015 3月 6
イベント2015 21st IEEE International Symposium on High Performance Computer Architecture, HPCA 2015 - Burlingame, United States
継続期間: 2015 2月 72015 2月 11

出版物シリーズ

名前2015 IEEE 21st International Symposium on High Performance Computer Architecture, HPCA 2015

Other

Other2015 21st IEEE International Symposium on High Performance Computer Architecture, HPCA 2015
国/地域United States
CityBurlingame
Period15/2/715/2/11

ASJC Scopus subject areas

  • コンピュータ ネットワークおよび通信
  • ハードウェアとアーキテクチャ
  • ソフトウェア

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