A few GUI windows have P/T set control elements. For example, the following figure shows the top portion of the Process Window.
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When you select a scope modifier, you are telling TotalView that when you press one of the buttons on the toolbar, this element names the focus on which TotalView acts. For example, if you select a thread and then select Step, TotalView steps the current thread. If Process (workers) is selected and you select Halt, TotalView halts all processes associated with the current thread’s workers group. If you are running a multi-process program, other processes continue to execute.
The Processes/Ranks Tab shows you which processes or ranks are members of the group. For more information, see “Using the Toolbar to Select a Target”.