TotalView Users Guide - CI Wiki

MPI Rank Display
Figure 85: Ranks Tab
If you can’t successfully start TotalView on MPI programs, check the following:
� Can you successfully start MPICH programs without TotalView?
The MPICH code contains some useful scripts that let you verify that you
can start remote processes on all of the computers in your computers file.
(See tstmachines in mpich/util.)
� You won’t get a message queue display if you get the following warning:
The symbols and types in the MPICH library used by
TotalView to extract the message queues are not as
expected in the image . This is probably
an MPICH version or configuration problem.
You need to check that you are using MPICH Version 1.1.0 or later and that
you have configured it with the –debug option. (You can check this by
looking in the config.status file at the root of the MPICH directory tree.)
� Does the TotalView Server (tvdsvr) fail to start?
tvdsvr must be in your PATH when you log in. Remember that TotalView
uses rsh to start the server, and that this command doesn’t pass your current
environment to remotely started processes.
� Make sure you have the correct MPI version and have applied all required
patches. See the TotalView Release Notes for up-to-date information.
� Under some circumstances, MPICH kills TotalView with the SIGINT signal.
You can see this behavior when you use the Group > Kill command as
the first step in restarting an MPICH job.
CLI: dfocus g ddelete
If TotalView exits and terminates abnormally with a Killed message, try setting
the TV::ignore_control_c variable to true.
MPI Rank Display
The Processes/Ranks Tab at the bottom of the Process Window contains a
grid that displays the status of each rank. For example, in Figure 85, six
ranks are at a breakpoint, one is running, and one is stopped.
For more information, see “Using the Processes/Ranks Tab” on page 229.
106 Chapter 6: Setting Up MPI Debugging Sessions