D. Buntinas, G. Mercier and W. Gropp, "Implementation and Shared-Memory Evaluation of MPICH2 over the Nemesis Communication Subsystem," Recent Advances in Parallel Virtual Machine and Message Passing Interface, Bonn, Germany, Springer, 2006, pp. 86-95. Also Preprint ANL/MCS-P1346-0506, September 2006. [pdf]
This paper presents the implementation of MPICH2 over the Nemesis communication subsystem and the evaluation of its shared-memory performance. We describe design issues as well as some of the optimization techniques we employed. We conducted a performance evaluation over shared memory using microbenchmarks as well as application benchmarks. The evaluation shows that MPICH2 Nemesis has very low communication overhead, making it suitable for smaller-grained applications.