Francieli Zanon Boito

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The High Performance Computing (HPC) community aimed for many years to increase performance regardless of energy consumption. Until the end of the decade, a next generation of HPC systems is expected to reach sustained performances of the order of exaflops. This requires many times more performance compared to the fastest supercomputers of today. Achieving(More)
This work shows how a Hybrid MPI/OpenMP implementation can improve the performance of the Ocean-Land-Atmosphere Model (OLAM) on a multi-core cluster environment , which is a typical HPC many small files work-load application. Previous experiments have shown that the scalability of this application on clusters is limited by the performance of the output(More)
This research work investigates the peformance impact of operating systems' (OS) caching parameters on a parallel file system (PFS). Through an extensive experimental analysis, an analytical performance model is proposed in order to reflect caching effects on performance of file write operations. A qualitative and quantitative evaluation of 855 test cases(More)
This work presents a tool for storage device profiling named SeRRa. Our tool obtains the sequential to random throughput ratio for reads and writes of different sizes. Several optimizations aim at adapting applications' access patterns in order to generate contiguous accesses for improved performance when accessing storage devices like hard disks. However,(More)