Intel® MPI Library User's Guide for Linux* OS
If yo use the IBM* Platform LSF* job scheduler, and the $LSB_MCPU_HOSTS is set, it will be parsed to get the list of hosts for the parallel job. $LSB_MCPU_HOSTS does not store the main process name; thus the local hostname will be added to the top of the hosts list. Based on this hosts list, a machine file for mpirun is generated with a unique name: /tmp/lsf_${username}.$$. The machine file is removed when the job is completed.
Example:
$ bsub –n 16 mpirun –n 16 ./myprog.exe