Optimize ACC port of atm_compute_solve_diagnostics_work:7418#1484
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abishekg7 wants to merge 2 commits into
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Optimize ACC port of atm_compute_solve_diagnostics_work:7418#1484abishekg7 wants to merge 2 commits into
abishekg7 wants to merge 2 commits into
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This PR introduces optimizations for the OpenACC port of atm_compute_solve_diagnostics_work:7418. The table below lists the timings for a real, global 30km experiment on A100 GPU with the nvhpc.
For nvhpc gpu runs, -gpu=math_uniform is introduced as a build flag to ensure optimizations are bit-identical, and the we report the numbers using NV_ACC_TIME=1. The GPU runs are on 1 Derecho GPU node, using 1 A100 via 1 MPI task.
The numbers reported for the CPU runs with gnu and intel compilers use the newly-added timers local to this region, and are averaged across three runs. The CPU runs use a single derecho CPU node each, fully subscribed to 128 MPI tasks.
TODO: Need to add @Pranay-Reddy-Kommera as the primary author for this commit.
This work was completed in part at the NCAR/NLR/NOAA Open Hackathon, part of the Open Hackathons program. The authors would like to acknowledge OpenACC-Standard.org for their support.