MPI_Request* req_ptr = reqs;
Request::sendrecv(send_buff, send_count, send_type, rank, tag,
(char *) recv_buff + rank * recv_count * extent, recv_count,
MPI_Request* req_ptr = reqs;
Request::sendrecv(send_buff, send_count, send_type, rank, tag,
(char *) recv_buff + rank * recv_count * extent, recv_count,