Exactly, on the scaling, but even then you probably won't see potential problems with, say, deadlock, that may hit you on a real system. You can't stress latenc

Exactly, on the scaling, but even then you probably won't see potential problems with, say, deadlock, that may hit you on a real system. You can't stress latency enough, as you'll now if you've ever seen something like cp2k limping over TCP/Ethernet. By the way, if you want to simulate performance of real coes on real systems (as you should), you use programs like dimemas, simgrid, and others with real or projected parameters.