A vanilla header-only object oriented interface around MPI in C++.

#include "human/mpi.hpp"
// ...
human::mpi::communicator world();

auto rank = world.rank();
auto size = world.size();
std::cout << "Process " << rank << "/" << size << std::endl;

std::string msg;
if (world.rank() == world.root()) msg = "Hello";

world.bcast(msg);

std::cout << "P" << rank << " " << msg << std::endl;

world.display(); // display time table

mkdir build && cd build
cmake ..
make -j

or

cmake -B build
cmake --build build

Then try

mpiexec -n 2 build/usage

• Send vector and string with automatic resize
• Time events and display time table
• Not exhaustive but simple to extend

• -DCMAKE_BUILD_TYPE=Debug
• -DUSE_HUMAN_MPI use the lib
• -DHUMAN_MPI_TIMER_USE_MPI=false use chrono
• -DHUMAN_MPI_TIMER_FOR_REAL=false disable timing

• Add mpi request in human::mpi
• Write tests using ctest or catch2
• Add async experiments
• Add multiple executable target in Cmake
• Configure Github action
• Simple Doc

• Developping an interface around MPI

Inspired by Boost.MPI