update slides

slides/pages/qa.md

@@ -13,7 +13,7 @@ Any questions about:
 
 <br/>
 
-### Materials
+### References
 
 - [The difference between modes of MPI send](https://iamsorush.com/posts/mpi-send-types/)
 - [Message Passing with MPI - PPCES 2017](https://blog.rwth-aachen.de/itc-events/en/event/ppces-2017/)

slides/pages/recap.md

@@ -58,3 +58,66 @@ Single Program Multiple Data:
 - Abstractions make programming and understanding easier
 - Multiple instruction flows (instances) from a Single Program working on Multiple (different parts of) Data
 - Instances could be threads (OpenMP) and/or processes (MPI)
+
+
+---
+title: MPI I
+---
+
+## MPI
+
+A language-agnostic specification of a set of communication and I/O operations.
+
+Standard bindings for C and Fortran. Non-standard bindings for other languages: C++, Java, Python etc.
+
+
+<v-click>
+
+### Differences between MPI and OpenMP
+
+Unlike OpenMP, MPI does not extend the base language, but provides a set of library functions and a specialised runtime. It also makes use of existing compilers.
+
+</v-click>
+
+<v-click>
+
+### Documentation
+
+- [The MPI Forum document archive (the standards)](https://www.mpi-forum.org/docs/)
+- [OpenMPI documentation](https://www.open-mpi.org/doc/)
+- [MPICH documentation](https://www.mpich.org/documentation/guides/)
+
+</v-click>
+
+---
+title: MPI II
+---
+
+## General Structure of an MPI Program
+
+Start-up, initialisation, finalisation, and shutdown in C:
+
+```c
+#include <mpi.h>
+
+int main(int argc, char **argv) {
+    // some code
+
+    // initialization of the MPI runtime environment
+    MPI_Init(&argc, &argv);
+
+    // code that handles computation & communication
+
+    // finalization of the MPI runtime enviroment, internal buffers are flushed etc.
+    MPI_Finalize();
+
+    // wrap-up code
+    return 0;
+}
+```
+
+---
+title: MPI III
+---
+
+## MPI Example: Hello World