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Assessing Contention Effects on MPI_Alltoall Communications
| Content Provider | Hyper Articles en Ligne (HAL) |
|---|---|
| Author | Steffenel, Luiz Angelo Martinasso, Maxime Trystram, Denis |
| 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. |
| Related Links | https://hal.science/hal-00136204/file/GPC2007-Steffenel.pdf |
| Conference Proceedings | 2nd International Conference on Grid and Pervasive Computing - GPC 2007 |
| Language | English |
| Publisher | HAL CCSD Springer Verlag |
| Publisher Date | 2007-05-02 |
| Access Restriction | Open |
| Subject Keyword | Collective Communications MPI Performance Modeling Network Contention |
| Content Type | Text |
| Resource Type | Conference Proceedings |
| Subject | Computer Science |
