A Comparison of Application Performance Using Open MPI and Cray MPI
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“A Comparison of Application Performance Using Open MPI and Cray MPI” [WMV, 6 MB] Richard Graham June 29, 2007 Abstract: Open MPI is the result of an active international open-source collaboration of industry, national laboratories, and academia. This implementation is becoming the production MPI implementation at many sites, including some of DOE’s large Linux production systems. This paper presents the results of a study comparing the application performance of VH-1, GTC, the Parallel Ocean Program, and S3D on the Cray XT4 at Oak Ridge National Laboratory, with data collected on up to 1,024 process runs. The results show that the application performance using Open MPI is comparable to or slightly better than that obtained using Cray MPI, even though no platform-specific optimizations, beyond a basic port, have yet to be done in Open MPI. Host: Ricky Kendall (kendallra@ornl.gov), 865-576-6905 |