Tutorial example extremely slow execution on ARM Cavium ThunderX2

[fcannini]

Hello there.

I'm installing OpenFoam 8 on the above mentioned HW and am having trouble running tutorials/incompressible/pimpleFoam/laminar/planarPoiseuille. It's running way slower than any other case tested so far (I'm running it as of now and it's already 3 hours of CPU wall time and counting).
Is there something I can do to try to pinpoint the cause of this slowness?

I've installed it through spack from version-8 release tag.
OS: Centos 7.7
CC / CXX: GCC 9.2.0
MPI: Openmpi 3.1.6
SCOTCH: 6.0.8

TIA,
Fabrício.