TotalView Users Guide - CI Wiki

Displaying the Message Queue
Figure 89: Message Queue
Window
tor structures, TotalView displays both of them. One is used for point-topoint
operations and the other is used for collective operations.
You cannot edit any of the fields in the Message Queue Window.
The contents of the Message Queue Window are only valid when a process
is stopped.
Using Message Operations
For each communicator, TotalView displays a list of pending receive operations,
pending unexpected messages, and pending send operations. Each
operation has an index value displayed in brackets ([n]). The online Help for
this window contains a description of the fields that you can display.
For more information, see:
� “Diving on MPI Processes” on page 110
� “Diving on MPI Buffers” on page 111
� “About Pending Receive Operations” on page 111
� “About Unexpected Messages” on page 111
� “About Pending Send Operations” on page 112
Diving on MPI Processes
To display more detail, you can dive into fields in the Message Queue Window.
When you dive into a process field, TotalView does one of the following:
� Raises its Process Window if it exists.
� Sets the focus to an existing Process Window on the requested process.
� Creates a new Process Window for the process if a Process Window
doesn’t exist.
110 Chapter 6: Setting Up MPI Debugging Sessions