OpenACC multicore + gpu in same binary #1761
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This was referenced Nov 18, 2024
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These changes allow targeting both gpu and multicore in the same binary when compiling OpenACC using Nvidia's nvc.
This can be potentially interesting for Grace Hopper where 72-core Arm processor is on the same board as an H100, "Funnel" mode would then allow execution of simulations in more efficient back-forth setups between (multi-threaded) CPU and GPU.
Relevant OPENACC flags for your mccode_config.json are:
"OACCFLAGS": "-fast -Minfo=accel -acc=gpu,multicore -gpu=managed -DOPENACC -DMULTICORE",