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- OMP_NUM_THREADS=0 max threads seen for a python3 process is 23
- OMP_NUM_THREADS=1 max threads seen for a python3 process is 23
- OMP_NUM_THREADS=2 max threads seen for a python3 process is 23
- OMP_NUM_THREADS=4 max threads seen for a python3 process is 24
- OMP_NUM_THREADS=8 max threads seen for a python3 process is 28
- OMP_NUM_THREADS=16 max threads seen for a python3 process is 36
QUESTION: What determines thread count in CASA-5?
ANSWER:
- Not cpuset
- Not the -n argument to mpicasa
- OMP_NUM_THREADS but it seems to only increase the thread count if is is greater than 1.