Hi all. I am running fenics in a Docker container on Arch Linux. In the past, I have used the conda version of fenics. I have vague memories that the conda version would automatically use all the cores of my laptop when I would solve a problem with large number of elements. On the other hand, the c…

Did you try mpi run -n (number of threads) python (your script) command?

Thank you very much. I tried mpirun. My driver reads the mesh from a XDMF file that stores the mesh in a HDF5 file. I got a bunch of errors: HDF5-DIAG: Error detected in HDF5 (1.10.0-patch1) MPI-process 0: #000: ../../../src/H5F.c line 491 in H5Fcreate(): unable to create file major: File acc…

Thank you for your reply. I started a Bash shell in the docker container and did echo $OMP_NUM_THREADS. I got an empty line which means the this environment variable is not set. I tried setting it to 4 and then run my code. But it was still using only one core of my laptop. But using mpirun -n4 ind…

Fenics in Docker automatic parallelization

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bmf October 25, 2019, 12:10pm 3

I think that this answer about running code in parallel may be useful.

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Fenics in Docker automatic parallelization

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