Evaluation of message passing communication patterns in finite element solution of coupled problems

Authors:
Renato N. Elias;Jose J. Camata;Albino Aveleda;Alvaro L. G. A. Coutinho
Affiliations:
Multidisciplinary Institute, Federal Rural University of Rio de Janeiro, Nova Iguaçu, RJ;NACAD, High Performance Computing Center, Federal University of Rio de Janeiro, Rio de Janeiro, RJ;NACAD, High Performance Computing Center, Federal University of Rio de Janeiro, Rio de Janeiro, RJ;NACAD, High Performance Computing Center, Federal University of Rio de Janeiro, Rio de Janeiro, RJ
Venue:
VECPAR'10 Proceedings of the 9th international conference on High performance computing for computational science
Year:
2010

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Abstract

This work presents a performance evaluation of single node and subdomain communication schemes available in EdgeCFD, an implicit edge-based coupled fluid flow and transport code for solving large scale problems in modern clusters. A natural convection flow problem is considered to assess performance metrics. Tests, focused in single node multi-core performance, show that past Intel Xeon processors dramatically suffer when large workloads are imposed to a single node. However, the problem seems to be mitigated in the newest Intel Xeon processor. We also observe that MPI nonblocking point-to-point interface sub-domain communications, although more difficult to implement, are more effective than collective interface subdomain communications.