Are crossbars really dead? The case for optical multiprocessor interconnect systems

Andreas G. Nowatzyk, Paul R. Prucnal

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

18 Scopus citations

Abstract

Crossbar switches are rarely considered for large, scalable multiprocessor interconnect systems because they require O(n2) switching elements, are difficult to control efficiently and are hard to implement once their size becomes too large to fit on one integrated circuit. However these problems are technology dependent and a recent innovation in fiber optic devices has led to a new implementation of crossbar switches that does not share these problems while retaining the full advantages of a crossbar switch: low latency, high throughput, complete connectivity and multi-cast capability. Moreover, this new technology has several characteristics that allow a distributed control system which scales linearly in the number of attached nodes. The innovation that led to this research is an optical and-gate that can be used to demultiplex multiple high speed data streams that are carried on one common optical medium. Optical time domain multiplexing can combine the data from many nodes and broadcast the result back to all nodes. This paper discusses OTDM technology only to the extent necessary to understand its characteristics and capabilities. The main contribution lies in the description and analysis of interconnect architectures that utilize OTDM to achieve a level performance that is beyond electronic means. It is expected that cost-reduced OTDM systems will become competitive with the next generation of interconnect systems.

Original languageEnglish (US)
Title of host publicationConference Proceedings - Annual International Symposium on Computer Architecture, ISCA
Pages106-115
Number of pages10
StatePublished - Jan 1 1995
Externally publishedYes
EventProceedings of the 1995 22nd Annual International Symposium on Computer Architecture - Santa Margherita Ligure, Italy
Duration: Jun 22 1995Jun 24 1995

Publication series

NameConference Proceedings - Annual International Symposium on Computer Architecture, ISCA
ISSN (Print)0884-7495

Other

OtherProceedings of the 1995 22nd Annual International Symposium on Computer Architecture
CitySanta Margherita Ligure, Italy
Period6/22/956/24/95

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture

Fingerprint Dive into the research topics of 'Are crossbars really dead? The case for optical multiprocessor interconnect systems'. Together they form a unique fingerprint.

  • Cite this

    Nowatzyk, A. G., & Prucnal, P. R. (1995). Are crossbars really dead? The case for optical multiprocessor interconnect systems. In Conference Proceedings - Annual International Symposium on Computer Architecture, ISCA (pp. 106-115). (Conference Proceedings - Annual International Symposium on Computer Architecture, ISCA).