int Coll_allreduce_smp_rdb::allreduce(void *send_buf, void *recv_buf, int count,
MPI_Datatype dtype, MPI_Op op,
MPI_Comm comm)
int Coll_allreduce_smp_rdb::allreduce(void *send_buf, void *recv_buf, int count,
MPI_Datatype dtype, MPI_Op op,
MPI_Comm comm)