Mpi mode of benchmark run script

Dear,
I am a newbee of castor.
I successful build castor-3.1.1 with intel-mpi and intel compiler mpiicpc.
Also I run the benchmark with the .sh script with single server OpenMP mode.
My question is: How to run the bencahmark with mpirun command? Is there some one have mpi-based parallel run example or shell sscript can share to me?
Thanks a lot!