Learning by doing :: MPI -- Virtual Topologies In MPI, Part 6

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 6 we continued our discussion by looking into MPI_Cart_sub which was used to create sub-cartesian grids from mother cartesian grids! Then we moved to two additional inquiry functions which generally are not used by the users namely MPI_Cart_map and MPI_Graph_map. These two usually are used to create additional virtual topology capabilities other than the ones provided by the standard itself. Finally, we touched briefly on the subject of neighbourhood collective communication and MPI_Neighbor_allgather but we didn't have time to look at the code examples prepared for that function.

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!