Adjust gpu default block sizes in Isopycnal to account for halos and loop bounds - #87
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GPU Port CoverageOverall: 3344 / 7860 portable executed lines ported (42.5%) Files touched by this PR: 133 / 137 portable executed lines ported (97.1%) Full per-file / per-routine breakdown: see the "gpu-port-report" job summary and artifact. Full line-by-line coverage report (combined across all cases) |
edoyango
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Aug 5, 2026
edoyango
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Aug 5, 2026
…ctually covers range iterated over in calc_isoneutral_slopes
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marshallward
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These changes make sense, and I detect no answer changes.
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My original implementation of blocking in
MOM_isopycnal_slopesdid not account for halos, or the fact that the loop bounds in this module run fromjs-1tojein the meridional direction andis-1toiein the zonal direction. Since the default block size did not cover the entire range of these loops, we were performing multiple iterations in the zonal and meridional directions on the gpu and launching extra kernels. This PR fixes the default block sizes for gpu runs to account for the halos and loop bounds, which reduces the number of kernel launches and gives a a slight speedup.