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This paper presents a toolset formed by a timing library and a clock synchronization library for a cluster. These are tools developed to measure both execution and communication times in distributed environments for performance evaluation. The toolset scalability is shown by experimentation as well as the instrumentation of a parallel matrix multiplication algorithm, based on broadcast communications...
This paper presents alternatives and performance results obtained by analyzing parallelization on a cluster of multicore nodes. The ultimate goal is to show if both shared and distributed memory parallel processing models need to be taken into account independently, or if one affects the other and both must be considered simultaneosly. The application used as a testbed is classical in the context...
Several optimization alternatives are presented for legacy Fortran 77 scientific programs, each one with a quantitative characterization in terms of performance gain. Initially, sequential optimization is focused on the analysis of Level 3 BLAS (basic linear algebra subroutines) utilization, since BLAS have several performance optimized implementations. Also, the Fortran 90/95 array notation is used...
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