TotalView
TotalView is a debugging software designed for high-scale HPC applications.
It supports debugging serial as well as parallel applications.
Supported parallel programming models include OpenMP, MPI, OpenACC and CUDA.
This page briefly describes how to debug serial and parallel programs written in C, C++ or Fortran 90/95 using the TotalView debugger.
Debugging Serial Programs
Preparation
Before debugging the program needs to be compiled with debug information using the -g flag and without any optimization (-O0 flag).
Starting TotalView
There are three ways to start debugging your program:
- by starting TotalView with your program as a parameter
$ totalview a.out [ -a options ]
- by starting your program first and then attaching TotalView to it. In this case just start . You will be asked what you would like to debug. Choose A running program (attach) and look for your already started program.
$ totalview
- by analyzing the core dump after your program crashed using
$ totalview a.out <corefile>
If the program requires startup parameters like runtime arguments, environment variables or standard IO these can be set in the ProcessStartup Parameters... menu.
After starting your programm Total View opens the Process Window which consists of different parts summarized by the table below:
| Source Pane | displays the program's source code |
| Stack Trace Pane | displays the call stack |
| Stack Frame Pane | displays all variables associated with the selected stack routine |
| Tabbed Pane | displays all breakpoints, action points and evaluation points in the Action Points subpane displays all (MPI) processes in the Processes subpane displays all threads of the current process in the Threads subpane |
| Status Bar | displays the status of the current process and thread |
| Toolbar | contains all action buttons |
Breakpoints
A breakpoint can easily be set by clicking on a boxed line number of an executable statement in the Source Pane. To remove a breakpoint just click on the corresponding boxed line number again.