Useful Notes for Debugging Parallel Code

GDB in parallel#

Adding the following to ~/.bashrc enables you to launch gdb in parallel with each process having its own terminal window. The -ex run bit is optional but saves you clicking in each terminal window and typing run.

paragdb()
{
    mpirun -np $1 xterm -e gdb -ex run $2
}
alias gdbp=paragdb

You may run a compiled test by typing:

gdbp 12 cell_based/build/debug/population/TestNodeBasedCellPopulationParallelMethodsRunner

where 12 is the number of processes you want to launch.