MPI Debug

What, debug with printf? Yes, though it is so basic, it works if you only want to check some variables or want to see if a specific execution path is taken. It doesn’t need any tool support, is independent of compiler flags, can be local or remote, and works with... [Read More]

Human, as we are, use tools, powerful tools! Which tools do you use for MPI debugging and at what scale? Please take 5 seconds to complete this anonymous Google Forms survey (no email collecting) here so that I can highlight the most popular tools in future posts. [Read More]

If you’ve landed here, you’re probably already familiar with key MPI-related websites like mpich.org, open-mpi.org, and mpi-forum.org. As a PETSc developer, I write MPI code regularly—and debugging MPI programs is part of my daily routine. One day, I discovered that nobody had registered the domain mpi-debug.org. So, I bought it.... [Read More]