Mpi operations - PowerPoint PPT Presentation

Blue Gene System and Performance Overview

Blue Gene System and Performance Overview. Wayne Pfeiffer April 5, 2007. BG/L is the first generation of IBM’s massively parallel, power-efficient Blue Gene architecture. Largest BG/L is at LLNL (installed from 4Q04 to 3Q05) 65,000+ compute nodes (131,000+ processors) in 64 racks

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MPI Datatypes

MPI Datatypes. The data in a message to sent or received is described by a triple (address, count, datatype), where An MPI datatype is recursively defined as: predefined, corresponding to a data type from the language (e.g., MPI_INT, MPI_DOUBLE_PRECISION) a contiguous array of MPI datatypes

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413 views • 18 slides

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