Debugging

You are here: Home > Developer Documentation > Debugging

---

This page collects some useful hints about how to debug a hybrid (CUDA + device) parallel (MPI) application.

MPI + Valgrind

Use the OpenMPI supressions list

mpiexec ... valgrind --suppressions=$MPI_ROOT/share/openmpi/openmpi-valgrind.supp picongpu ...

MPI + GDB

Trigger start and back trace afterwards:

mpiexec ... gdb -ex r -ex tb --args ...