I have been using Ubuntu to run computational simulations of materials. Sometimes calculations overcome total memory available of machine, 64GB RAM, and starts to use swap. When this happen Ubuntu ...
Say I have a 4-core workstation, what would linux (Ubuntu) do if I execute mpirun -np 9 XXX Q1. Will 9 run immediately together, or they will run 4 after 4? Q2. I suppose that using 9 is not good, ...