Totalview® for HPC User Guide : PART I Introduction to Debugging with TotalView : Chapter 1 About TotalView : Data Display and Visualization : Data Visualization : The Call Tree and Call Graph
The Call Tree and Call Graph
The Call Tree or Call Graph, accessible from the Process Window using the command Tools > Call Graph, provides a quick view of application state and is especially helpful for locating outliers and bottlenecks.
 
Figure 9 – Tools > Call Graph Dialog Box
By default, the Call Tree or Call Graph displays the Call Tree representing the backtrace of all the selected processes and threads.
For multi-process or multi-threaded programs, a compressed process/thread list (ptlist) next to the arrows indicates which threads have a routine on their call stack. You can dive on a routine in the call tree/graph to create a group called call_graph that contains all the threads that have the routine you dived on in their call stack.
 
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The Call Tree or Call Graph in more detail
Using the CLI’s dwhere -group_by option to control and reduce the backtraces
dwhere -group_by in the TotalView for HPC Reference Guide
About the ptlist
"Compressed List Syntax (ptlist)" in the TotalView for HPC Reference Guide
Using the Tools > Call Graph command
Tools > Call Graph in the in-product Help