MPI communications for the SF split
It seems that not much had to be done in order to have the MPI version. I have updated the cell (un)packing functions for the sf_count
with the gparts
and also realized that I should move a bit the new particles in order to avoid a division by 0 (I am using the same code for the displacement than for the particle splitting).
To test it, I have run the SmallCosmoVolume with 4 ranks.