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BCS-MPI: A New Approach in the System Software Design for Large-Scale Parallel Computers

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3 Author(s)
Fernandez, J. ; Los Alamos National Laboratory, NM, Universidad de Murcia, Spain ; Frachtenberg, E. ; Petrini, F.

Buffered CoScheduled MPI (BCS-MPI) introduces a new approach to design the communication layer for large-scale parallel machines. The emphasis of BCS-MPI is on the global coordination of a large number of communicating processes rather than on the traditional optimization of the point-to-point performance. BCS-MPI delays the inter-processor communication in order to schedule globally the communication pattern and it is designed on top of a minimal set of collective communication primitives. In this paper we describe a prototype implementation of BCS-MPI and its communication protocols. Several experimental results, executed on a set of scientific applications, show that BCS-MPI can compete with a production-level MPI implementation, but is much simpler to implement, debug and model.

Published in:

Supercomputing, 2003 ACM/IEEE Conference

Date of Conference:

15-21 Nov. 2003