Hybrid programming with MPI & OpenMP - Prace Training Portal
Hybrid programming with MPI & OpenMP - Prace Training Portal
Hybrid programming with MPI & OpenMP - Prace Training Portal
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HECToR – PSIWAT (DEISA benchmark)Performance of QE, pure <strong>MPI</strong>HECToR – CNT10POR8 (CINECA benchmark)Speed‐upSpeed‐up87654321256 512 1024 2098 4096STDSCALAPACK3,53,2532,752,52,2521,7515 1,51,251512 1024 2048 4096STDSCALAPACKHPCx – PSIWAT (DEISA benchmark)BCX – W256 (CINECA benchmark)Speed‐upSpeed‐up32,7525 2,554Smaller dataset, no more data to distribute<strong>MPI</strong> saturate, Here <strong>OpenMP</strong> can help2,2521,751,5STDSCALAPACK32SCALAPACK1,251256 512 1024164 128 256 512 1024http://www.deisa.eu/science/benchmarking/results15