This paper reports on the recent efforts developing a performance tool for MPI applications on Linux clusters. The target MPI implementations were LAM/MPI and MPICH2, both of which support portions of the MPI-2 Standard. The authors started with an existing performance tool and added support for non-shared file systems, MPI-2 one-sided communications, dynamic process creation, and MPI Object naming. The authors present results using the enhanced version of the tool to examine the performance of several applications. the paper describes a new performance tool benchmark suite it have developed, PPerfMark, and present results for the benchmark using the enhanced tool.
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