After a lot of research I did not realize how the communicators in SCALAPCK, especially in MKL, are used. I want to call SCLAPACK routines only from the subset of MPI_COMM_WORLD. For example, I start my program with 28 processes, but I just want to use the first 5x5 = 25 processes for SCALAPACK and let others do something else. How should I initialize SCALAPACK accordingly ?
Thank you in advance,
Dmitry