Manipulating Processes and Threads

User_Guides : Classic TotalView User Guide : PART II Debugging Tools and Tasks : Manipulating Processes and Threads

Viewing Process and Thread States

Displaying a Thread Name

Using the Toolbar to Select a Target

Stopping Processes and Threads

Using the Processes/Ranks and Threads Tabs

Updating Process Information

Holding and Releasing Processes and Threads

Using Barrier Points

Examining Groups

Placing Processes in Groups

Starting Processes and Threads

Creating a Process Without Starting It

Creating a Process by Single-Stepping

Stepping and Setting Breakpoints

This chapter illustrates some foundational parallel debugging tasks and is based on the shipped program, wave_extended_threads, located in the directory installdir/toolworks/totalview.version/platform/examples. This is a simple program that creates an array and then increments its values to simulate a wave form which can then be viewed using the Visualizer. The program requires user input to provide the number of times to increment.

The first steps when debugging programs with TotalView are similar to those using other debuggers:

Use the -g option to compile the program. (Compiling is not discussed here. Please see Compiling Programs.)

Start the program under TotalView control.

Start the debugging process, including setting breakpoints and examining your program’s data.

When working with multi-process, multi-threaded programs, you have many options for controlling thread and process execution, viewing specific threads and processes, and organizing processes in to groups in order to better view the various elements of your program.