MPICH Debugging Tips

Here are some debugging tips that apply only to MPICH:

• Passing options to mpirun

  You can pass options to TotalView through the MPICH mpirun command.

  To pass options to TotalView when running mpirun, you can use the TOTALVIEW environment variable. For example, you can cause mpirun to invoke TotalView with the -no_stop_all option as in the following C shell, example:

      setenv TOTALVIEW "totalview -no_stop_all"

• Using ch_p4

  If you start remote processes with MPICH/ch_p4, you may need to change the way TotalView starts its servers.

  By default, TotalView uses rsh to start its remote server processes. This is the same behavior as ch_p4. If you configure MPICH/ch_p4 to use a different start-up mechanism from another process, you will probably also need to change the way that TotalView starts the servers.

  For more information about tvdsvr and rsh, see Single Process Server Launch Options. For more information about rsh, see Single Process Server Launch Command.