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Table 1 Computational performance of SCALE-LES

From: Impacts of cloud microphysics on trade wind cumulus: which cloud microphysics processes contribute to the diversity in a large eddy simulation?

Number of core 16 2048 8192 32,768 131,072 663,552a
(Number of MPI process) (2) (256) (1024) (4096) (16,384) (82,944)
Elapsed time (s step−1) 2.528 2.172 2.443 2.017 1.995 2.113
Performance efficiency (%) 5.5 6.3 5.6 6.8 6.9 6.5
  1. Elapsed time (s step−1) and performance efficiency (%) of SCALE-LES measured using the two-moment bulk microphysical scheme. The performance was measured through an experiment in which the number of grids for each MPI process was the same (weak scaling test) on the K computer
  2. aThis test used all nodes of the K computer