Assessing Contention Effects on MPI_Alltoall Communications
Identifieur interne : 003187 ( Istex/Curation ); précédent : 003186; suivant : 003188Assessing Contention Effects on MPI_Alltoall Communications
Auteurs : Luiz Angelo Steffenel [France] ; Maxime Martinasso [France] ; Denis Trystram [France]Source :
- Lecture Notes in Computer Science [ 0302-9743 ]
Abstract
Abstract: One of the most important collective communication patterns used in scientific applications is the complete exchange, also called All-to-All. Although efficient algorithms have been studied for specific networks, general solutions like those available in well-known MPI distributions (e.g. the MPI_Alltoall operation) are strongly influenced by the congestion of network resources. In this paper we present an integrated approach to model the performance of the All-to-All collective operation, which consists in identifying a contention signature that characterizes a given network environment, using it to augment a contention-free communication model. This approach, assessed by experimental results, allows an accurate prediction of the performance of the All-to-All operation over different network architectures with a small overhead.
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DOI: 10.1007/978-3-540-72360-8_36
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Although efficient algorithms have been studied for specific networks, general solutions like those available in well-known MPI distributions (e.g. the MPI_Alltoall operation) are strongly influenced by the congestion of network resources. In this paper we present an integrated approach to model the performance of the All-to-All collective operation, which consists in identifying a contention signature that characterizes a given network environment, using it to augment a contention-free communication model. This approach, assessed by experimental results, allows an accurate prediction of the performance of the All-to-All operation over different network architectures with a small overhead.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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