TotalView User Guide : Part II: Debugging Tools and Tasks : Manipulating Processes and Threads : Placing Processes in Groups
Placing Processes in Groups
TotalView uses your executable’s name to determine the share group that the program belongs to. If the path names are identical, TotalView assumes that they are the same program. If the path names differ, TotalView assumes that they are different, even if the file name in the path name is the same, and places them in different share groups.
 
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Using the Group > Edit Group command
Group > Edit Group in the in-product Help