Same string displayed again for different processes

Should be displayed once
```c
PID:[2675]
169	    c_ierr = MPI_Irecv(buf, *count, c_type, *source, *tag, c_comm, &c_req);

(xgdb) 
PID:[2674...2676]
169	    c_ierr = MPI_Irecv(buf, *count, c_type, *source, *tag, c_comm, &c_req);
```