for (i = 0; i < num_procs; i++) {
src = dst = rank ^ i;
smpi_mpi_sendrecv(send_ptr + dst * send_chunk, send_count, send_type, dst,
for (i = 0; i < num_procs; i++) {
src = dst = rank ^ i;
smpi_mpi_sendrecv(send_ptr + dst * send_chunk, send_count, send_type, dst,