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Opportunities and challenges of modern communication architectures: case study with QsNet

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2 Author(s)
Kumar, S. ; Dept. of Comput. Sci., Illinois Univ., Urbana, IL, USA ; Kale, L.V.

Summary form only given. We describe our efforts to scale message driven applications to a large number of processors on an Alpha cluster interconnected by QsNet. The clustering technology QsNet has a network interface with a communication coprocessor. The presence of the coprocessor minimizes main processor participation in message passing. We show the advantages of the communication coprocessor for message driven applications. To scale fine-grained message driven applications to a large number of processors we had to overcome several hardware, software and operating system hindrances. We describe them in detail and present solutions for them. We use NAMD, a molecular dynamics program, as a case study for many of our performance optimizations.

Published in:

Parallel and Distributed Processing Symposium, 2004. Proceedings. 18th International

Date of Conference:

26-30 April 2004