Lecture 18: Message Passing

../_images/L18-title.png Lecture 12 slides Lecture 18 panopto Podcast

(Originally recorded 2019-05-30)

We continue to develop the message passing paradigm for distributed memory parallel computing, looking in more depth at principal abstractions in MPI (communicator, message envelope, message contents) and two vairants of “six-function MPI”. Laplace’s equation is part of the HPC canon so we do a deep dive on approaches for solving Laplace’s equation (iteratively) with MPI – which leads to the the compute-communicate (aka BSP) pattern.