SC is the International Conference for
 High Performnance Computing, Networking, Storage and Analysis

SCHEDULE: NOV 13-19, 2010

Hybrid MPI and OpenMP Parallel Programming

SESSION: M02: Hybrid MPI and OpenMP Parallel Programming

EVENT TYPE: Tutorial

TIME: 8:30AM - 12:00PM

Presenter(s):Rolf Rabenseifner, Georg Hager, Gabriele Jost


Most HPC systems are clusters of shared memory nodes. Such systems can be PC clusters with single/multi-socket and multi-core SMP nodes, but also "constellation" type systems with large SMP nodes. Parallel programming may combine the distributed memory parallelization on the node interconnect with the shared memory parallelization inside of each node. This tutorial analyzes the strength and weakness of several parallel programming models on clusters of SMP nodes. Various hybrid MPI+OpenMP programming models are compared with pure MPI. Benchmark results of several platforms are presented. The thread-safety quality of several existing MPI libraries is also discussed. Case studies will be provided to demonstrate various aspects of hybrid MPI/OpenMP programming. Another option is the use of distributed virtual shared-memory technologies. Application categories that can take advantage of hybrid programming are identified. Multi-socket-multi-core systems in highly parallel environments are given special consideration. Details:

Chair/Presenter Details:

Rolf Rabenseifner - High Performance Computing Center Stuttgart

Georg Hager - Erlangen Regional Computing Center

Gabriele Jost - University of Texas at Austin

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