Hello everyone,
I've got a question about MPI program performance: I've developed an MPI program that processes large amounts of data (about 10^9) elements, and running this program I've noticed that as many processes I create using mpiexec utility as longer the duration of the program execution. What could be a cause of the following issue ?? When I run this program in a single computational node, it works faster rather running that using two computational nodes. Please, help.
Regards, Arthur.