In the OpenModelica Users Guide appears:

Faster simulations on multi-core computers can be obtained by using a new OpenModelica feature that automatically
partitions the system of equations and schedules the parts for execution on different cores using sharedmemory
OpenMP based execution. The speedup obtained is dependent on the model structure, whether the system
of equations can be partitioned well. This version in the current OpenModelica release is an experimental version
without load balancing. The following command, not yet available from the OpenModelica GUI, will run a
parallel simulation on a model:

>>> omc -d=openmp model.mo

How can I write this command in order to execute parallel simulation? I don't know if this function is already available.