[bennn]

Hi all,

I'm trying to use cfMesh for automatic optimization, but unfortunately, it automatically uses all the cores on my machine. Do you know if there is a way to force it to use only one core ?

Apart from that it is really working great even on crazy geometries !

[franjo_j]

Originally Posted by bennn

Hi all,

I'm trying to use cfMesh for automatic optimization, but unfortunately, it automatically uses all the cores on my machine. Do you know if there is a way to force it to use only one core ?

Apart from that it is really working great even on crazy geometries !

Hello,

The number of active cores is controlled by the OMP_NUM_THREADS variable. If you set export OMP_NUM_THREADS=1, the mesher will use only one core.

[daniyalaltaf]

Originally Posted by franjo_j

Hello,

The number of active cores is controlled by the OMP_NUM_THREADS variable. If you set export OMP_NUM_THREADS=1, the mesher will use only one core.

Hi Franjo,

My query is actually the opposite. I ran "cartesianMesh" on my 4 core 17-7700HQ and openFoam 7 and it used all 4 physical cores and that's great for me.

Now I am using the same command on a workstation PC with a 32 core AMD ryzen Threadripper 2990WX-32 and openFoam 18.10. But this time it is only using 1 core.

Since you mentioned setting OMP_NUM_THREADS, Could you please explicitly explain where and in what sequence to write the commands that are needed to enable multicore usage with cfMesh command "cartesianMesh"

Thanks.