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Performance comparison of the A-grid and C-grid shallow-water models on icosahedral grids
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2022
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Source: The International Journal of High Performance Computing Applications, 37(2), 197-208
[PDF-2.33 MB]
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Journal Title:The International Journal of High Performance Computing Applications
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NOAA Program & Office:
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Description:This study uses a single software framework to compare the CPU performance of Arakawa A-grid (NICAM) and C-grid (MPAS) schemes for solving the shallow-water equations on icosahedral grids. The focus is on high-resolution weather prediction. Performance analysis shows the simpler structure of the A-grid equations enables compiler optimization-based efficiency gains that the C-grid equations cannot match. Strong scaling runs at 3.5 km resolution show the A-grid is three times faster than the C-grid, enabling the A-grid to run at 50% higher resolution in only 15% more time. A performance comparison with the MPAS shallow-water model is included which demonstrates that our software implementation of the C-grid is robust and comparisons are fair.
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Source:The International Journal of High Performance Computing Applications, 37(2), 197-208
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DOI:
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ISSN:1094-3420;1741-2846;
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Document Type:
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Rights Information:Accepted Manuscript
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Compliance:Submitted
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