Problem while running code with GPU but running well using CPU

[atanuchaudhury1994@gmail.com]

Dear OpenLB team,
I was running the Cylinder3d program while I am a new stl file which is extended at Y-axis. But while I am increasing the resolution (N) from 20 and above it does not run in ‘GPU’ but it is running well in ‘CPU’. When I used the ‘Gpu only’ config file it is giving an error: out of memory, so, I used the ‘Gpu openmpi’ config file and its giving error:

root@acmt-gpu:/home/achaudhury/olb-1.7r0/examples/laminar/cylinder3d# mpirun –allow-run-as-root -np 2 ./cylinder3d
./cylinder3d: symbol lookup error: /lib/x86_64-linux-gnu/libmpi_cxx.so.40: undefined symbol: ompi_mpi_errors_throw_exceptions
./cylinder3d: symbol lookup error: /lib/x86_64-linux-gnu/libmpi_cxx.so.40: undefined symbol: ompi_mpi_errors_throw_exceptions
————————————————————————–
prterun detected that one or more processes exited with non-zero status,
thus causing the job to be terminated. The first process to do so was:

Process name: [prterun-acmt-gpu-192644@1,0] Exit code: 127
————————————————————————–
root@acmt-gpu:/home/achaudhury/olb-1.7r0/examples/laminar/cylinder3d# mpicc -o cylinder3d cylinder3d.c
gcc: error: cylinder3d.c: No such file or directory
root@acmt-gpu:/home/achaudhury/olb-1.7r0/examples/laminar/cylinder3d# mpirun –version
mpirun (Open MPI) 5.0.5

Report bugs to https://www.open-mpi.org/community/help/

Please help me to solve this bug.

[Adrian]

Please learn to read what the computer tells you. If your GPU simulation is out of memory in a single process on a single GPU, using more won’t change anything.

This is not a bug. I know I said this before on this forum but I am finally close to just blocking you, you literally don’t follow any advice.

[atanuchaudhury1994@gmail.com]

I will try Multi GPU. Sorry for the inconvience caused Sir.

Thank you

[Author]

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