* bug#73649: OpenMPI + mpi4py broken: rank=0
@ 2024-10-06 1:01 Antero Mejr
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From: Antero Mejr @ 2024-10-06 1:01 UTC (permalink / raw)
To: 73649
Running this command:
guix shell python python-mpi4py openmpi -- mpirun -n 12 python3 \
-c "from mpi4py import MPI; comm = MPI.COMM_WORLD;
print(comm.Get_rank())"
should print the numbers 0-11. Instead it prints 0 11 times. The same
behavior occurs in a container or pure environment.
This breaks any code using mpi4py, because ranks >0 must be available
for multi-threaded code to work.
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2024-10-06 1:01 bug#73649: OpenMPI + mpi4py broken: rank=0 Antero Mejr
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