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• W1998627866 abstract "We report on scaling and timing tests of the SIESTA electronic structure code for ab initio molecular dynamics simulations using density-functional theory. The tests are performed on six large-scale supercomputers belonging to the PRACE Tier-0 network with four different architectures: Cray XE6, IBM BlueGene/Q, BullX, and IBM iDataPlex. We employ a systematic strategy for simultaneously testing weak and strong scaling, and propose a measure which is independent of the range of number of cores on which the tests are performed to quantify strong scaling efficiency as a function of simulation size. We find an increase in efficiency with simulation size for all machines, with a qualitatively different curve depending on the supercomputer topology, and discuss the connection of this functional form with weak scaling behaviour. We also analyze the absolute timings obtained in our tests, showing the range of system sizes and cores favourable for different machines. Our results can be employed as a guide both for running SIESTA on parallel architectures, and for executing similar scaling tests of other electronic structure codes." @default.
• W1998627866 created "2016-06-24" @default.
• W1998627866 creator A5080002786 @default.
• W1998627866 date "2014-04-18" @default.
• W1998627866 modified "2023-10-16" @default.
• W1998627866 title "Performance Analysis of Electronic Structure Codes on HPC Systems: A Case Study of SIESTA" @default.
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• W1998627866 doi "https://doi.org/10.1371/journal.pone.0095390" @default.
• W1998627866 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3991679" @default.
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