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2006
IEEE

A decomposition approach for optimizing the performance of MPI libraries

12 years 3 months ago
A decomposition approach for optimizing the performance of MPI libraries
MPI provides a portable message passing interface for many parallel execution platforms but may lead to inefficiencies for some platforms and applications. In this article we show that the performance of both, standard libraries and vendor-specific libraries, can be improved by an orthogonal organization of the processors in 2D or 3D meshes and by decomposing the collective communication operations into several phases. We describe an adaptive approach with a configuration phase to determine for a specific execution platform and a specific MPI library which decomposition leads to the best performance. This may also depend on the number of processors and the size of the messages to be transferred. The decomposition approach has been implemented in the form of a library extension which is called for each activation of a collective MPI operation. This has the advantage that neither the application programs nor the MPI library need to be changed while leading to significant performan...
O. Hartmann, Matthias Kühnemann, Thomas Raube
Added 12 Jun 2010
Updated 12 Jun 2010
Type Conference
Year 2006
Where IPPS
Authors O. Hartmann, Matthias Kühnemann, Thomas Rauber, Gudula Rünger
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