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Facilitating co-design for extreme-scale systems through lightweight simulation

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2 Author(s)
Engelmann, C. ; Comput. Sci. & Math. Div., Oak Ridge Nat. Lab., Oak Ridge, TN, USA ; Lauer, F.

This work focuses on tools for investigating algorithm performance at extreme scale with millions of concurrent threads and for evaluating the impact of future architecture choices to facilitate the co-design of high-performance computing (HPC) architectures and applications. The approach focuses on lightweight simulation of extreme-scale HPC systems with the needed amount of accuracy. The prototype presented in this paper is able to provide this capability using a parallel discrete event simulation (PDES), such that a Message Passing Interface (MPI) application can be executed at extreme scale, and its performance properties can be evaluated. The results of an initial prototype are encouraging as a simple hello world MPI program could be scaled up to 1,048,576 virtual MPI processes on a four-node cluster, and the performance properties of two MPI programs could be evaluated at up to 16,384 virtual MPI processes on the same system.

Published in:

Cluster Computing Workshops and Posters (CLUSTER WORKSHOPS), 2010 IEEE International Conference on

Date of Conference:

20-24 Sept. 2010

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