TOP Events & Outreach R-CCS Cafe The 179th R-CCS Cafe - part 1
The 179th R-CCS Cafe - part 1
Title
The First Supercomputer with HyperX Topology: A Viable Alternative to Fat-Trees?
Date | Thu, Aug 22, 2019 |
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Time | 2 pm - 2:40 pm |
City | Kobe, Japan |
Place | Lecture Hall (6th floor) at R-CCS |
Language | Presentation Language: English Presentation Material: English |
Speakers |
Abstract
The state-of-the-art topology for modern supercomputers are Folded Clos networks, a.k.a. Fat-Trees. The node count in these massively parallel systems is steadily increasing. This forces an increased path length, which limits gains for latency-sensitive applications. A novel, yet only theoretically investigated, alternative is the low-diameter HyperX. To perform a fair side-by-side comparison between a 3-level Fat-Tree and a 12x8 HyperX, we constructed the world’s first 3 Pflop/s supercomputer with these two networks. We show through a variety of benchmarks that the HyperX, together with our novel communication pattern-aware routing, can challenge the performance of traditional Fat-Trees.
(Aug 15, 2019)