CNET: design of an RSFQ switching network for petaflops-scale computing

Author

Wittie, L. ; Zinoviev, D.Yu. ; Sazaklis, G. ; Likharev, K.

Author_Institution

Dept. of Comput. Sci., State Univ. of New York, Stony Brook, NY, USA

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

4034

Lastpage

4039

Abstract

This work is part of a project to design a petaflops-scale computer using a Hybrid Technology Multi-Threaded (HTMT) architecture. In the core of the superconductor part of the HTMT system there should be a high-bandwidth low-latency RSFQ switching cryonetwork (CNET) connecting 4.096 computing modules with each other and with room-temperature semiconductor components. In this report, we present a preliminary study of three simplified, "flat" models of the CNET, each for two alternative architectures: banyan network and pruned high-dimensional mesh. The results indicate that with the speed and space limitations accepted in the HTMT concept, CNET will be able to provide a cross-sectional bandwidth of about 2/3 packets per computing module per network clock cycle (in the present design, 32 ps).

Keywords

floating point arithmetic; multi-threading; multistage interconnection networks; packet switching; superconducting logic circuits; superconducting processor circuits; 32 ps; CNET; RSFQ switching network; banyan network; cross-sectional bandwidth; flat models; hybrid technology multi-threaded architecture; petaflops-scale computing; pruned high-dimensional mesh; switching cryonetwork; Application software; Astronomy; Computer architecture; Computer networks; Computer science; Holographic optical components; Joining processes; Physics computing; Space technology; Switches;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.783913

Filename

783913