tmp_buf = xbt_malloc(sizeof(void *)*expected_recv_count);
requests = xbt_malloc(sizeof(MPI_Request)*expected_recv_count);
for(k=0; k < expected_recv_count; k++ ) {
tmp_buf = xbt_malloc(sizeof(void *)*expected_recv_count);
requests = xbt_malloc(sizeof(MPI_Request)*expected_recv_count);
for(k=0; k < expected_recv_count; k++ ) {