Hybrid MPI/StarSs - a case study

Details Hybrid MPI/StarSs - a case study Hybrid MPI/StarSs - a case study

2012-04-18

arxiv.org/abs/1204.4086v1

Computer Science

Distributed, Parallel, and Cluster Computing

8 pages, accepted for publication in ISPA 2012

Scientific paper

Hybrid parallel programming models combining distributed and shared memory paradigms are well established in high-performance computing. The classical prototype of hybrid programming in HPC is MPI/OpenMP, but many other combinations are being investigated. Recently, the data-dependency driven, task parallel model for shared memory parallelisation named StarSs has been suggested for usage in combination with MPI. In this paper we apply hybrid MPI/StarSs to a Lattice-Boltzmann code. In particular, we present the hybrid programming model, the benefits we expect, the challenges in porting, and finally a comparison of the performance of MPI/StarSs hybrid, MPI/OpenMP hybrid and the original MPI-only versions of the same code.

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