Coarray Fortran is a set of features of the Fortran 2008 standard that make Fortran a PGAS parallel programming language. Two commercial compilers currently support coarrays: Cray and Intel. Here we present two coarray transport layers provided by the new OpenCoarrays project: one library based on MPI and the other on GASNet. We link the GNU Fortran (GFortran) compiler to either of the two OpenCoarrays implementations and present performance comparisons between executables produced by GFortran and the Cray and Intel compilers. The comparison includes synthetic benchmarks, application prototypes, and an application kernel. In our tests, Intel outperforms GFortran only on intra-node small transfers (in particular, scalars). GFortran outperforms Intel on intra-node array transfers and in all settings that require inter-node transfers. The Cray comparisons are mixed, with either GFortran or Cray being faster depending on the chosen hardware platform, network, and transport layer.

Fanfarillo, A., Burnus, T., Cardellini, V., Filippone, S., Nagle, D., Rouson, D. (2014). OpenCoarrays: open-source transport layers supporting coarray Fortran compilers. In Proceedings of the 8th International Conference on Partitioned Global Address Space Programming Models (PGAS 2014) (pp. 1-11). New York : ACM [10.1145/2676870.2676876].

OpenCoarrays: open-source transport layers supporting coarray Fortran compilers

CARDELLINI, VALERIA;FILIPPONE, SALVATORE;
2014-01-01

Abstract

Coarray Fortran is a set of features of the Fortran 2008 standard that make Fortran a PGAS parallel programming language. Two commercial compilers currently support coarrays: Cray and Intel. Here we present two coarray transport layers provided by the new OpenCoarrays project: one library based on MPI and the other on GASNet. We link the GNU Fortran (GFortran) compiler to either of the two OpenCoarrays implementations and present performance comparisons between executables produced by GFortran and the Cray and Intel compilers. The comparison includes synthetic benchmarks, application prototypes, and an application kernel. In our tests, Intel outperforms GFortran only on intra-node small transfers (in particular, scalars). GFortran outperforms Intel on intra-node array transfers and in all settings that require inter-node transfers. The Cray comparisons are mixed, with either GFortran or Cray being faster depending on the chosen hardware platform, network, and transport layer.
2014
Settore ING-INF/05 - SISTEMI DI ELABORAZIONE DELLE INFORMAZIONI
English
Rilevanza internazionale
Articolo scientifico in atti di convegno
Article No. 4
http://dl.acm.org/citation.cfm?id=2676870.2676876&coll=DL&dl=GUIDE&CFID=513614747&CFTOKEN=94517989
Fanfarillo, A., Burnus, T., Cardellini, V., Filippone, S., Nagle, D., Rouson, D. (2014). OpenCoarrays: open-source transport layers supporting coarray Fortran compilers. In Proceedings of the 8th International Conference on Partitioned Global Address Space Programming Models (PGAS 2014) (pp. 1-11). New York : ACM [10.1145/2676870.2676876].
Fanfarillo, A; Burnus, T; Cardellini, V; Filippone, S; Nagle, D; Rouson, D
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/112849
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