Starting Parallel Tasks

TotalView : TotalView User Guide : PART III Parallel Debugging : Setting Up Parallel Sessions : MPI Program Setup : IBM MPI Parallel Environment (PE) Applications : Starting Parallel Tasks

After you set breakpoints, you can start all of the parallel tasks with the Group > Go command.

dfocus G dgo Abbreviation: G

NOTE: No parallel tasks reach the first line of code in your main routine until all parallel tasks start.

Be cautious in placing breakpoints at or before a line that calls MPI_Init() or MPL_Init() because timeouts can occur while your program is being initialized. After you allow the parallel processes to proceed into the MPI_Init() or MPL_Init() call, allow all of the parallel processes to proceed through it within a short time.

RELATED TOPICS
Saving action points	Saving and Loading Action Points
More information on debugging with IBM PE	“IBM PE Debugging Tips” in the Classic TotalView User Guide’s chapter “Debugging Strategies for Parallel Applications.”