Opportunities and Challenges of Modern Communication Architectures:Case Study with QsNet

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 co-processor. The presence of the co-processor minimizes main processor participation in message passing. We show the advantages of the communication co-processor 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.

Sameer Kumar and L. V. Kale, "Opportunities and Challenges of Modern Communication
Architectures: Case Study with QsNet", Proceedings of Workshop on Communication 
Architecture for Clusters in Conjunction with IPDPS 04, 2004.

@inproceedings{CACIPDPS04,
        author="Sameer Kumar and L. V. Kale",
        title="{Opportunities and Challenges of Modern Communication
Architectures: Case Study with QsNet}",
        year="2004",
	booktitle = "Proceedings of Workshop on Communication Architecture for Clusters in Conjunction with IPDPS 04"
}