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Conference Papers Year : 2011

Splitting TCP for MPI Applications Executed on Grids

Abstract

In this paper, we first study the interaction between MPI applications and TCP on grids. Then, we propose MPI5000, a transparent applicative layer between MPI and TCP, using proxies to improve the execution of MPI applications on a grid. Proxies aim at splitting TCP connections in order to detect losses faster and avoid to return in a slow-start phase after an idle time. Finally, we evaluate our layer executing the NAS Parallel Benchmarks on Grid5000, the French research grid, using MPICH2. The results show that our architecture reduces the number of idle timeout and of long-distance retransmissions for BT, SP and LU benchmarks. Using MPI5000, these applications can decrease their execution time by 35%, 28%, and, 15% respectively. A comparison with MPICH-G2 performances shows that our layer can even outperform a grid enabled MPI implementation.
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Dates and versions

hal-00767643 , version 1 (20-12-2012)

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Olivier Glück, Jean-Christophe Mignot. Splitting TCP for MPI Applications Executed on Grids. 2011 IEEE Ninth International Symposium on Parallel and Distributed Processing with Applications, May 2011, Busan, South Korea. pp.207-212, ⟨10.1109/ISPA.2011.11⟩. ⟨hal-00767643⟩
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