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SC Conference - Activity Details



High-Radix Crossbar Switches Enabled by Proximity Communication

Authors:
Hans Eberle  (Sun Microsystems)
Pedro J. Garcia  (Universidad de Castilla-La Mancha)
José Flich  (Universidad Politecnica de Valencia)
José Duato  (Universidad Politecnica de Valencia)
Robert Drost  (Sun Microsystems)
Nils Gura  (Sun Microsystems)
David Hopkins  (Sun Microsystems)
Wladek Olesinski  (Sun Microsystems)
Papers Session
Processor and Switch Architecture
Wednesday,  11:30AM - 12:00PM
Room Ballroom F
Abstract:
We describe a novel way to implement high-radix crossbar switches. Our work is enabled by a new chip interconnect technology called Proximity Communication (PxC) that offers unparalleled chip IO density. First, we show how a crossbar architecture is topologically mapped onto a PxC-enabled multi-chip module (MCM). Then, we describe a first prototype implementation of a small-scale switch based on a PxC MCM. Finally, we present a performance analysis of two large-scale switch configurations with 288 ports and 1,728 ports, respectively, contrasting a 1-stage PxC-enabled switch and a multi-stage switch using conventional technology. Our simulation results show that (a) arbitration delays in a large 1-stage switch can be considerable, (b) multi-stage switches are extremely susceptible to saturation under non-uniform traffic, a problem that becomes worse for higher radices (1-stage switches, in contrast, are not affected by this problem).
The full paper can be found in the IEEE Xplore Digital Library and ACM Digital Library
   IEEE Computer Society  /  ACM     2 0   Y E A R S   -   U N L E A S H I N G   T H E   P O W E R   O F   H P C