To set up a parallel session in the UI, from the Start Page, select Debug a Parallel Program to launch the Parallel Session dialog. See Debug a Parallel Program.

Programs started using the UI have some limitations: program launch does not use the information you set for single-process and bulk server launching, and you cannot use the Attach Subset command.

MPI programs use a starter program such as mpirun. You can start these MPI programs in two ways: with the starter program under TotalView control, or using the UI, in which case the starter program is not under TotalView control.