Learning by doing :: MPI -- Virtual Topologies In MPI, Part 4

This video is part of the new series called "Learning by doing :: MPI" which serves as an introductory course on MPI (Message Passing Interface). In this video we talked about virtual topologies in MPI! This topic corresponds to chapter 8 of the MPI standard v4.1. It is a lengthy chapter with a lot of information to digest. We followed the same pattern as for "Datatypes in MPI" by dividing a chapter into digestible ~25 mins long parts. In part 4 we continued our discussion by talking about topology inquiry functions in MPI. In particular, we had time to go over the following inquiry functions : MPI_Topo_test, MPI_Graphdims_get, MPI_Graph_get, MPI_Cartdim_get, MPI_Cart_get, MPI_Cart_rank, MPI_Cart_coords, MPI_Graph_neighbors_count and MPI_Graph_neighbors. We checked couple of code examples which we have already seen in previous episodes but we always skipped the inquiry section of those codes because we haven't introduced those inquiry functions yet. In other words, you will understand every line of the codes we have shown in previous episodes completely.

All the necessary info you need for MPI standard can be downloaded from here : https://www.mpi-forum.org/docs/mpi-4....

If you want to download MPICH, please visit here : https://www.mpich.org/downloads/
* The latest version at the time of this video is mpich-4.2.2

Hope you learned something from this video. If you have further questions don't hesitate to comment down below. Have fun!