Individual Execution Commands

TotalView : TotalView User Guide : PART III Parallel Debugging : Group, Process, and Thread Control : Stepping and Program Execution : Individual Execution Commands

In the UI, the focus of any execution command is the thread selected in the Processes and Threads view, and the width control selected from the Focus menu. In Figure 121, the thread of interest (TOI) is 7.1, and the width is process; TotalView will advance all threads in the process that contains the TOI, or process 7.

Figure 121, The Focus menu in the UI

The term goal identifies the location at which a given command will stop executing. For example, for a Step command, the goal is the “next line,” even if it’s in a different subroutine, while for a Run to command, the goal is the selected line. A Go command has no defined goal.

Table 13 defines the default action each execution command takes. Execution commands all default to process width if no other width is provided.

NOTE: Table 13 includes commands available in the UI. Some other execution commands are available only in the CLI, in particular drun and drerun used after dload if you have a starter program. See “CLI Commands” in the TotalView Reference Guide for more information.

Table 13: Execution Commands’ Default Actions
Command	Default action
Go	Continues all processes and threads in the current focus. See dgo.
Halt	Stops all processes and threads in the current focus. See dhalt.
Kill	Kills all target processes in the current focus. If, however, you kill the primary process for a control group, all processes in the control group are killed. Process-level only. This command cannot be used at thread-width. See dkill.
Restart	Kills all processes in the current control group, then restarts the process that was in the current focus. This command is relevant only to a group. To restart a process, use drerun. See dkill.
Next	Steps one source line, stepping over any subroutine calls. See dnext.
Step	Steps the thread of interest one source line while allowing other threads in the process to run freely. If a statement in a source line call a subroutine, this command steps into the function. See dstep.
Out	Runs a thread until it returns from either of the current subroutine or one or more nested subroutines. When using the default process width, all threads in the process that are not running to this goal run free. See dout.
Run To	Runs the process until a selected location is reached, usually a line in the Source view. If this command is applied to a group, its behavior differs depending on the width. See duntil.