Strong and Weak Scalability Studies for the 2-D Poisson Equation on the Taki 2018 Cluster

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dc.contributor.authorBarajas, Carlos
dc.contributor.authorGobbert, Matthias K.
dc.date.accessioned2019-05-31T19:02:08Z
dc.date.available2019-05-31T19:02:08Z
dc.date.issued2019
dc.description.abstractThe new 2018 nodes in the 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. Parallel performance studies for the memory-bound test problem of the Poisson equation in two spatial dimensions yield several conclusions for the operation of the CPU cluster in taki. Strong scalability studies demonstrate excellent performance 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. Weak scalability studies confirm that best throughput is achieved by using all cores on a shared-memory node. 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-pernode performance of parallel code continues to improve due to the larger number of cores available on a node. These observations compel the recommendations that serial code should use the 2009 and 2013 nodes of taki and parallel code is needed to take full advantage of the high-memory 2018 nodes. Comparisons between several compilers and several implementations of the MPI standard justify the choice of the Intel suite as the default on taki.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).en_US
dc.description.urihttps://userpages.umbc.edu/~gobbert/papers/PoissonHPCF20191.pdfen_US
dc.format.extent15 pagesen_US
dc.genretechnical reportsen_US
dc.identifierdoi:10.13016/m2zqvy-kjyr
dc.identifier.urihttp://hdl.handle.net/11603/13989
dc.language.isoen_USen_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.ispartofseriesTechnical Report;HPCF–2019–1
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.subjectIntel Skylake CPUsen_US
dc.subjectEDR (Enhanced Data Rate)en_US
dc.subjectPoisson equationen_US
dc.subjectshared-memory nodeen_US
dc.titleStrong and Weak Scalability Studies for the 2-D Poisson Equation on the Taki 2018 Clusteren_US
dc.typeTexten_US

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