ABSTRACT.A majority of parallel applications executed on HPC clusters.Use MPI for communication between processes. Most users.Treat MPI as a black box executing their, programs using the.Cluster "s default settings. While the default settings perform.Adequately for, many cases it is well known that optimizing.The MPI environment can significantly improve application.Performance. Although the existing optimization tools are.Effective when used by performance experts they require,,Deep knowledge of MPI library behavior and the underlying.Hardware architecture in which the application will be executed.Therefore an easy-to-use, tool that provides recommendations.For configuring the MPI environment to optimize.Application performance is highly desirable. This paper addresses.This need by presenting an easy-to-use methodology.And tool named Advisor that, MPI, requires just a single execution.Of the input application to characterize its predominant.Communication behavior and determine the MPI con -.Figuration that may enhance its performance on the target.Combination of MPI library and hardware architecture.
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