caa a22 4500 445851783 CHVBK 20180317145415.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1007/s11227-010-0392-4 doi (NATIONALLICENCE)springer-10.1007/s11227-010-0392-4 Analyzing the execution of sparse matrix-vector product on the Finisterrae SMP-NUMA system [Elektronische Daten] [Juan Pichel, Juan Lorenzo, Dora Heras, Jose Cabaleiro, Tomás Pena] In this paper, the sparse matrix-vector product (SpMV) is evaluated on the FinisTerrae SMP-NUMA supercomputer. Its architecture particularities make the tuning of SpMV especially relevant due to the significant impact on the performance. First, we have estimated the influence of data and thread allocation. Moreover, because of the indirect and irregular memory access patterns of SpMV, we have also studied the influence of the memory hierarchy in the performance. According to the behavior observed in the study, a set of optimizations specially tuned for FinisTerrae were successfully applied to SpMV. Noticeable improvements are obtained in comparison with the SpMV naïve implementation. Springer Science+Business Media, LLC, 2010 Sparse matrix nationallicence NUMA nationallicence Thread affinity nationallicence Memory hierarchy nationallicence Pichel Juan Galicia Supercomputing Center (CESGA), Santiago de Compostela, Spain aut Lorenzo Juan Electronics and Computer Science Dpt., Univ. of Santiago de Compostela, Santiago de Compostela, Spain aut Heras Dora Electronics and Computer Science Dpt., Univ. of Santiago de Compostela, Santiago de Compostela, Spain aut Cabaleiro Jose Electronics and Computer Science Dpt., Univ. of Santiago de Compostela, Santiago de Compostela, Spain aut Pena Tomás Electronics and Computer Science Dpt., Univ. of Santiago de Compostela, Santiago de Compostela, Spain aut The Journal of Supercomputing Springer US; http://www.springer-ny.com 58/2(2011-11-01), 195-205 0920-8542 58:2<195 2011 58 11227 https://doi.org/10.1007/s11227-010-0392-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11227-010-0392-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pichel Juan Galicia Supercomputing Center (CESGA), Santiago de Compostela, Spain aut NATIONALLICENCE 700 1- Lorenzo Juan Electronics and Computer Science Dpt., Univ. of Santiago de Compostela, Santiago de Compostela, Spain aut NATIONALLICENCE 700 1- Heras Dora Electronics and Computer Science Dpt., Univ. of Santiago de Compostela, Santiago de Compostela, Spain aut NATIONALLICENCE 700 1- Cabaleiro Jose Electronics and Computer Science Dpt., Univ. of Santiago de Compostela, Santiago de Compostela, Spain aut NATIONALLICENCE 700 1- Pena Tomás Electronics and Computer Science Dpt., Univ. of Santiago de Compostela, Santiago de Compostela, Spain aut NATIONALLICENCE 773 0- The Journal of Supercomputing Springer US; http://www.springer-ny.com 58/2(2011-11-01), 195-205 0920-8542 58:2<195 2011 58 11227 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer