[TOM01]

Hello,

I have a strange behaviour maybe somebody has a hint how to solve.

I bought an old Workstation with two XEON cpu's having six cores each
(means with HT 2x6x2 = 24 max processes.)
The strange thing is, that Openfoam always uses only 50% of the performance, means only 3 kernels from each cpu.
Even if I start 3 times Openfoam each with 6 processes (for meshing 3 regions), it does not use the other 6 cpu's.

Is there any linux crack who knows what could be the reason?

When I use additionally another software e.g. paraview, this software uses the other 3 cores.

Best,

Tobi

[TOM01]

Additional Information:

at simulation with simpleFoam with 12 processes, it is distributed well on all 12 cores.
The problem appears only when starting complete independent instances.
(This I need, as I mesh always 3 independend regions and afterwards merge them)