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Julia: Difference between revisions
Newer Julia MPI requires different way to set backend MPI info
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(Newer Julia MPI requires different way to set backend MPI info) |
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You must make sure Julia's MPI is configured to use our MPI libraries. | You must make sure Julia's MPI is configured to use our MPI libraries. If you are using Julia MPI 0.19 or earlier, run the following: | ||
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module load StdEnv | module load StdEnv julia | ||
export JULIA_MPI_BINARY=system | export JULIA_MPI_BINARY=system | ||
export JULIA_MPI_PATH=$EBROOTOPENMPI | export JULIA_MPI_PATH=$EBROOTOPENMPI | ||
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import Pkg; | import Pkg; | ||
Pkg.add("MPI") | Pkg.add("MPI") | ||
If you are using Julia MPI 0.20 or later, run the following (note that this appends an <code>[MPIPreferences]</code> section to your .julia/environments/vX.Y/LocalPreferences.toml file, if one already exists, it should be manually removed first): | |||
module load julia | |||
mkdir -p .julia/environments/v${EBVERSIONJULIA%.*} | |||
cat >> .julia/environments/v${EBVERSIONJULIA%.*}/LocalPreferences.toml << EOF | |||
[MPIPreferences] | |||
_format = "1.0" | |||
abi = "OpenMPI" | |||
binary = "system" | |||
libmpi = "${EBROOTOPENMPI}/lib64/libmpi.so" | |||
mpiexec = "${EBROOTOPENMPI}/bin/mpiexec" | |||
EOF | |||
Then start Julia and inside it run: | |||
import Pkg | |||
Pkg.add("MPIPreferences") | |||
Pkg.add("MPI") | |||
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module load StdEnv | module load StdEnv julia | ||
mpirun -np 2 julia hello.jl | mpirun -np 2 julia hello.jl | ||