Actual source code: mpitr.c

      1: #define PETSC_DLL
      2: /*
      3:     Code for tracing mistakes in MPI usage. For example, sends that are never received,
      4:   nonblocking messages that are not correctly waited for, etc.
      5: */

     7:  #include petsc.h

      9: #if defined(PETSC_USE_LOG) && !defined(_petsc_mpi_uni)

     13: /*@C
     14:    PetscMPIDump - Dumps a listing of incomplete MPI operations, such as sends that
     15:    have never been received, etc.

     17:    Collective on PETSC_COMM_WORLD

     19:    Input Parameter:
     20: .  fp - file pointer.  If fp is NULL, stdout is assumed.

     22:    Options Database Key:
     23: .  -mpidump - Dumps MPI incompleteness during call to PetscFinalize()

     25:     Level: developer

     27: .seealso:  PetscMallocDump()
     28:  @*/
     29: PetscErrorCode PETSC_DLLEXPORT PetscMPIDump(FILE *fd)
     30: {
     32:   PetscMPIInt    rank;
     33:   double         tsends,trecvs,work;

     36:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
     37:   if (!fd) fd = stdout;
     38:
     39:   /* Did we wait on all the non-blocking sends and receives? */
     40:   PetscSequentialPhaseBegin(PETSC_COMM_WORLD,1);
     41:   if (irecv_ct + isend_ct != sum_of_waits_ct) {
     42:     PetscFPrintf(PETSC_COMM_SELF,fd,"[%d]You have not waited on all non-blocking sends and receives",rank);
     43:     PetscFPrintf(PETSC_COMM_SELF,fd,"[%d]Number non-blocking sends %g receives %g number of waits %g\n",rank,isend_ct,irecv_ct,sum_of_waits_ct);
     44:     fflush(fd);
     45:   }
     46:   PetscSequentialPhaseEnd(PETSC_COMM_WORLD,1);
     47:   /* Did we receive all the messages that we sent? */
     48:   work = irecv_ct + recv_ct;
     49:   MPI_Reduce(&work,&trecvs,1,MPI_DOUBLE,MPI_SUM,0,PETSC_COMM_WORLD);
     50:   work = isend_ct + send_ct;
     51:   MPI_Reduce(&work,&tsends,1,MPI_DOUBLE,MPI_SUM,0,PETSC_COMM_WORLD);
     52:   if (!rank && tsends != trecvs) {
     53:     PetscFPrintf(PETSC_COMM_SELF,fd,"Total number sends %g not equal receives %g\n",tsends,trecvs);
     54:     fflush(fd);
     55:   }
     56:   return(0);
     57: }

     59: #else

     63: PetscErrorCode PETSC_DLLEXPORT PetscMPIDump(FILE *fd)
     64: {
     66:   return(0);
     67: }

     69: #endif