[d3rioe]

OK, thanks for pointing that out. I had missed the CXX := mpic++ option instead of the default CXX := g++. After recompiling it with that option, running it with mpirun -np 4 ./bstep2d ran on 4 cores like it was supposed to.

Thanks for the help!

d3rioe

• This reply was modified 3 years, 6 months ago by d3rioe.

[d3rioe]

Thanks for the reply. I should have mentioned that I was using mpirun. For example I just ran bstep2d with the following command:

$ /usr/lib64/openmpi/bin/mpirun -np 4 --use-hwthread-cpus ./bstep2d

However the first line of output is:

[OmpManager] Sucessfully initialized, numThreads=32

Similarly when I ran it without the –use-hwthread-cpus option:

$ /usr/lib64/openmpi/bin/mpirun -np 4 ./bstep2d
[OmpManager] Sucessfully initialized, numThreads=32

I’m pretty sure that Openmpi is fine, I use it for running the other simulations that are running on my system without any issues.

• This reply was modified 3 years, 6 months ago by d3rioe.

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