Displaying the Message Queue

The Tools > Message Queue dialog box displays the your MPI program's message queue state. This can be useful when you need to find the cause of a deadlock.

To use the message queue display feature, you must be using one of the following versions of MPI:

• MPICH version 1.1.0 or later.
   
• Compaq Alpha MPI (DMPI) version 1.7.
   
• HP HP-UX version 1.6.
   
• IBM MPI Parallel Environment (PE) version 2.3 or 2.4; but only for programs using the threaded IBM MPI libraries. MQD is not available with earlier releases, or with the non-thread-safe version of the IBM MPI library. Therefore, to use TotalView MQD with IBM MPI applications, you must compile and link your code using the mpcc_r, mpxlf_r, or mpxlf90_r compilers.
   
• For the SGI MPI TotalView message queue display, you must obtain the Message Passing Toolkit (MPT) release 1.3 or later. Check with SGI for availability.