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dc.contributor.authorBarajas, Carlos A.
dc.contributor.authorGobbert, Matthias K.
dc.date.accessioned2020-07-29T18:11:58Z
dc.date.available2020-07-29T18:11:58Z
dc.description.abstractThe new 2018 nodes in the CPU cluster taki in the UMBC High Performance Computing Facility contain two 18-core Intel Skylake CPUs and 384 GB of memory per node, connected by an EDR (Enhanced Data Rate) InfiniBand interconnect. The performance studies use the classical test problem of the Poisson equation in two spatial dimensions, discretized by the finite difference method to give a very large and sparse system of linear equations that is solved by the conjugate gradient method. The results demonstrate excellent scalability when using multiple nodes due to the low latency of the high-performance interconnect and good speedup when using all cores of the multi-core CPUs. Comparisons to results on the 2009 and 2013 nodes bring out that core-per-core performance of serial code improvements have stalled, but that node-per-node performance of parallel code continues to improve due to the larger number of cores available on a node. These observations compel the recommendations that (i) serial code should use the 2009 and 2013 nodes of taki and (ii) parallel code is needed to take full advantage of the 2018 nodes.en_US
dc.description.sponsorshipThe hardware used in the computational studies is part of the UMBC High Performance Computing Facility (HPCF). The facility is supported by the U.S. National Science Foundation through the MRI program (grant nos. CNS–0821258, CNS–1228778, and OAC–1726023) and the SCREMS program (grant no. DMS–0821311), with additional substantial support from the University of Maryland, Baltimore County (UMBC). See hpcf.umbc.edu for more information on HPCF and the projects using its resources. The first author was supported by UMBC as HPCF RA.en_US
dc.description.urihttp://hpcf-files.umbc.edu/research/papers/PoissonHPCF201818.pdfen_US
dc.format.extent11 pagesen_US
dc.genretechnical reportsen_US
dc.identifierdoi:10.13016/m2conu-t41t
dc.identifier.citationCarlos Barajas and Matthias K. Gobbert, Parallel Performance Studies for an Elliptic Test Problem on the 2018 Portion of the Taki Cluster, http://hpcf-files.umbc.edu/research/papers/PoissonHPCF201818.pdfen_US
dc.identifier.urihttp://hdl.handle.net/11603/19276
dc.language.isoen_USen_US
dc.publisherUMBCen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Mathematics Department Collection
dc.relation.ispartofUMBC Faculty Collection
dc.relation.ispartofUMBC Student Collection
dc.relation.ispartofseriesHPCF–2018–18;
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.subjectUMBC High Performance Computing Facility (HPCF)en_US
dc.titleParallel Performance Studies for an Elliptic Test Problem on the 2018 Portion of the Taki Clusteren_US
dc.typeTexten_US


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