TotalView User Guide : Part IV: Advanced Tools, Configuration, and Customization : Setting Up MPI Debugging Sessions : MPICH2 Applications : Starting TotalView Debugging on an MPICH2 MPD Job
Starting TotalView Debugging on an MPICH2 MPD Job
You must start the mpd daemon before starting an MPICH2 MPI job.
 
*As of MPICH2 1.4.1, the default job type is Hydra, rather than MPD, so if you are using the default, there is no need to start the daemon. See Starting TotalView Debugging on an MPICH2 Hydra Job”.