Setting Up Parallel Debugging Sessions

This chapter explains how to set up TotalView parallel debugging sessions for applications that use the following parallel execution models. The topics discussed are:

• Debugging MPI Applications Overview
• Debugging MPICH Applications
• Debugging Compaq MPI Applications
• Debugging HP MPI Applications
• Debugging IBM MPI (PE) Applications
• Debugging QSW RMS Applications
• Debugging SGI MPI Applications
• Displaying the Message Queue Graph
• Debugging OpenMP Applications
• Debugging PVM and DPVM Applications
• Shared Memory Code
• Debugging Portland Group, Inc., HPF Applications
• Parallel Debugging Tips

Note:   TotalView lets you decide which process you want it to attach. You will find information in Attaching to Processes.

Debugging MPI Applications Overview

You can use TotalView to debug your Message Passing Interface (MPI) programs. With TotalView, you can:

• Automatically acquire processes at startup.
   
• Attach to a parallel program and automatically acquire the parallel processes.
   
• Display the message queue state of a process.

Automatic process acquisition at startup is supported for the following MPI implementations:

• MPICH version 1.1.0 or later running on any platform that is supported by both TotalView and MPICH (see Debugging MPICH Applications). (You are strongly urged to use a later version of MPICH. Information on versions that work with TotalView can be found in the TotalView Platforms document.)
   
• Compaq MPI (DMPI) running on Compaq Alpha (see Debugging Compaq MPI Applications).
   
• HP MPI running on HP PA-RISC 1.1 or 2.0 processors (see Debugging HP MPI Applications).
   
• IBM MPI Parallel Environment (PE) running on AIX on RS/6000 and SP (see Debugging IBM MPI (PE) Applications).
   
• SGI MPI running on IRIX on MIPS processors (see Debugging SGI MPI Applications).
   
• QSW RMS running on Compaq AlphaServer SC systems (see Debugging QSW RMS Applications).

For more information on message queue display, see Displaying the Message Queue Graph.

For tips on debugging parallel applications, see Parallel Debugging Tips.