Function init_random

src/utils/random_number_generators.cpp:164–202

}

void init_random(int seed, int num_io_RNGs, lbann_comm* comm)
{
  generator_inited = true;
  fast_generator_inited = true;

  // Use different seed on each rank in trainer
  if (seed == -1) {
    std::random_device rd;
    seed = rd();
  }
  else if (comm != nullptr) {
    seed = hash_combine(seed, comm->get_rank_in_trainer());
  }
  else if (El::mpi::Initialized()) {
    seed = hash_combine(seed, El::mpi::Rank(El::mpi::COMM_WORLD));
  }

  // Seed every OpenMP thread, if present.
  // Note: Threadprivate OMP variables don't work with dynamic threads.
#ifdef _OPENMP
#pragma omp parallel
  {
    const int thread = omp_get_thread_num();
    const int thread_seed = hash_combine(seed, thread);
    get_generator().seed(thread_seed);
    get_fast_generator().seed(
      hash_combine(thread_seed, 132241)); // 12345th prime
  }
#else
  get_generator().seed(seed);
  get_fast_generator().seed(hash_combine(seed, 41263)); // 4321th prime
#endif

  // Set Elemental's RNG seed
  El::Generator().seed(hash_combine(seed, 104729)); // 10000th prime

  // Initialize IO RNGs
  init_io_random(seed, num_io_RNGs);
}

void init_data_seq_random(int seed)
{