mscclpp/tests/bootstrap_test_cpp.cc

#include "mscclpp.hpp"

#include <memory>

#include <mpi.h>

int main()
{
  int rank, worldSize;
  MPI_Init(NULL, NULL);
  MPI_Comm_rank(MPI_COMM_WORLD, &rank);
  MPI_Comm_size(MPI_COMM_WORLD, &worldSize);

  std::shared_ptr<mscclpp::Bootstrap> bootstrap(new mscclpp::Bootstrap(rank, worldSize));
  // bootstrap->Initialize("costsim-dev-00000A:50000");
  mscclpp::UniqueId id;
  if (rank == 0)
    id = bootstrap->createUniqueId();
  MPI_Bcast(&id, sizeof(id), MPI_BYTE, 0, MPI_COMM_WORLD);
  bootstrap->initialize(id);

  std::vector<int> tmp(worldSize, 0);
  tmp[rank] = rank + 1;
  bootstrap->allGather(tmp.data(), sizeof(int));
  for (int i = 0; i < worldSize; i++) {
    if (tmp[i] != i + 1)
      printf("error AllGather: rank %d: tmp[%d] = %d\n", rank, i, tmp[i]);
  }
  printf("rank %d: AllGather test passed!\n", rank);

  bootstrap->barrier();
  printf("rank %d: Barrier test passed!\n", rank);

  for (int i = 0; i < worldSize; i++) {
    if (i == rank)
      continue;
    int msg1 = (rank + 1) * 2;
    int msg2 = (rank + 1) * 2 + 1;
    bootstrap->send(&msg1, sizeof(int), i, 0);
    bootstrap->send(&msg2, sizeof(int), i, 1);
  }

  for (int i = 0; i < worldSize; i++) {
    if (i == rank)
      continue;
    int msg1 = 0;
    int msg2 = 0;
    // recv them in the opposite order to check correctness
    bootstrap->recv(&msg2, sizeof(int), i, 1);
    bootstrap->recv(&msg1, sizeof(int), i, 0);
    if (msg1 != (i + 1) * 2 || msg2 != (i + 1) * 2 + 1)
      printf("error Send/Recv: rank %d: msg1 = %d, msg2 = %d\n", rank, msg1, msg2);
  }
  printf("rank %d: Send/Recv test passed!\n", rank);

  MPI_Finalize();
  return 0;
}