Intel® MPI Library Reference Manual for Linux* OS
The Intel® MPI Library supports integrated performance monitoring (IPM) summary format as part of the built-in statistics gathering mechanism described above. You do not need to modify the source code or re-link your application to collect this information.
The I_MPI_STATS_BUCKETS environment variable is not applicable to the IPM format. The I_MPI_STATS_ACCURACY environment variable is available to control extra functionality.
The Intel® MPI Library also supports an optional ipm region feature. This feature requires the source code modification. The MPI_Pcontrol function can be used.