For message passing interface (MPI) analysis , configure collectors to determine MPI rank ID in case of a non-Intel MPI library implementation.
-trace-mpi | -no-trace-mpi
Based on the PMI_RANK or PMI_ID MPI analysis environment variable (whichever is set), the VTune Profiler extends a process name with the captured rank number that is helpful to differentiate ranks in a VTune Profiler result with multiple ranks. The process naming schema in this case is <process_name> (rank <N>). Use the -trace-mpi option to enable detecting an MPI rank ID for MPI implementations that do not provide the environment variable.
This command runs the Hotspots analysis type (hardware event-based sampling mode) with enabled MPI rank ID detection.
mpirun -n 4 vtune -result-dir my_result -trace-mpi -collect hotspots -knob sampling-mode=hw -- ./test.x