A C++20 Interface for MPI 4.0

arXiv (Cornell University)

Abstract

We present a modern C++20 interface for MPI 4.0. The interface utilizes recent language features to ease development of MPI applications. An aggregate reflection system enables generation of MPI data types from user-defined classes automatically. Immediate and persistent operations are mapped to futures, which can be chained to describe sequential asynchronous operations and task graphs in a concise way. This work introduces the prominent features of the interface with examples. We further measure its performance overhead with respect to the raw C interface.

Authors 4

1. Ali Can Demiralp Aachen Visual Computing Institute

   RWTH Aachen University

   Affiliation as printed

   Visual Computing Institute RWTH Aachen University Aachen , Germany

2. Niko Sakic Aachen IT centre

   RWTH Aachen University

   Affiliation as printed

   IT Center RWTH Aachen University Aachen , Germany

3. Marcel Krüger
4. Tim Gerrits Aachen Visual Computing Institute

   RWTH Aachen University

   Affiliation as printed

   Visual Computing Institute RWTH Aachen University Aachen , Germany