Whereever you need to set a break point inside a piece of code run by MPI,
Step 1: call vtkBreakPoint::Break() in the code. Step 2: start MPI, each process will display its PID and sleep. Step 3: start gdb with the PID: gdb --pid=<PID> Step 4: set a breakpoint at the line of interest: (gdb) b <option> Step 5: go out of the sleep: (gdb) set var i=1 Original instructions at the OpenMPI FAQ: http://www.open-mpi.de/faq/?category=debugging#serial-debuggers
Static Public Member Functions
|static void||Break ()|
|static void vtkBreakPoint::Break||(||)||
Process fall asleep until local variable `i' is set to a value different from 0 inside a debugger.