Design Exploration of Multi-tier interconnects for Exascale systems

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

  • Authors:
  • Javier Navaridas
  • Joshua Lant
  • Jose Pascual Saiz
  • Mikel Luján
  • Anthony Goodacre


Interconnection networks are one of the main limiting factors when it comes to scale out computing systems. In this paper, we explore what role the hybridization of topologies has on the design of an state-of-the-art exascale-capable computing system. More precisely we compare several hybrid topologies and compare with common single-topology ones when dealing with large-scale application-like traffic. In addition we explore how different aspects of the hybrid topology can affect the overall performance of the system. In particular, we found that hybrid topologies can outperform state-of-the-art torus and fattree networks as long as the density of connections is high enough{one connection every two or four QFDBs seems to be the sweet spot{and the size of the subtori is limited to a few nodes per dimension.

Bibliographical metadata

Original languageEnglish
Title of host publicationICPP 2019 : International Conference on Parallel Processing
Publication statusAccepted/In press - 21 May 2019
EventICPP 2019 : International Conference on Parallel Processing - Kyoto, Japan
Event duration: 5 Aug 20198 Aug 2019


ConferenceICPP 2019 : International Conference on Parallel Processing
Abbreviated titleICPP 2019