MPIEZ

The main goal of this C++ library is to allow to use the MPI library easily.

Example

#include <iostream>
#include <vector>

#include <mpiez/include/mpiez.hpp>

using namespace std;
using namespace mpiez;

//(1) We create a protocol with our "messages"
struct Prot : Protocol {
  Prot(int pid, int nprocs) : Protocol(pid, nprocs) {}
  Message<0, int> m;
};

//(2) We create a process with our protocol and we override the "routine" method
struct Proc : Process<Prot> {
  Proc(Prot & p) : Process(p) {}

  void routine() {
    int a;
    if(proto.pid == 0) {
      a = 2;
      proto.m.send(1, a); //we send an int to process 1
      a = 3;
    } else {
      proto.m.recv(0, a); //we receive an int from process 0
    }
    cout << "I am " << proto.pid << " a = " << a << endl; 
    /* Result:
    I am 0 a = 3
    I am 1 a = 2
    */
  }
};

int main(int argc, char ** argv) {

  Mpiez<Prot, Proc> ad(argc, argv); //we create a mpiez object in which mpi is initialized
  ad.finalize();
  
  return 0;
}

What can you do whith MPIEZ

1 dim : MPI_COMM_WORLD

Point to point communications

• send
• ssend
• bsend
• isend
• issend
• (ibsend, error...)
• send_recv
• send_recv_replace

Collective communications

• bcast
• scatter
• scatterv
• gather
• gatherv

Type of data allowed : int, char, string, int* (char*, float*..) ... Vectors (vector, vector...) are allowed with C++11 and superior.

TODO : Point to point communications

• MPI_Sendrecv_replace (STRING)

TODO : Collective communications

• MPI_Alltoall
• MPI_Reduce
• MPI_Allreduce
• MPI_Allgatherv
• MPI_Alltoallv