Josh, If we don't take in account resilience I would not expect MPI_Probe to have that many opportunities to return errors. However, in order to keep the implementation consistent (with the other MPI functions) I would abide to the following.
MPI_ERROR_IN_STATUS is only for calls taking multiple requests as input, so I don't think this should be applied to the MPI_Probe. I would expect the return to be equal to status.MPI_ERROR (similar to only other function working on a single request, such as MPI_Test). It better trigger the error-handler attached to the communicator, as explicitly requested by the MPI standard (section 8.3). > A user can associate error handlers to three types of objects: communicators, > windows, and files. The specified error handling routine will be used for any > MPI exception that occurs during a call to MPI for the respective object. george. On Mar 21, 2011, at 16:50 , Joshua Hursey wrote: > If MPI_Probe() encounters an error causing it to exit with the > 'status.MPI_ERROR' set, say: > ret = MPI_Probe(MPI_ANY_SOURCE, MPI_ANY_TAG, MPI_COMM_WORLD, &status); > > Should it return an error? So should it return: > - ret = status.MPI_ERROR > - ret = MPI_ERROR_IN_STATUS > - ret = MPI_SUCCESS > Additionally, should it trigger the error handler on the communicator? > > In Open MPI, it will always return MPI_SUCCESS (pml_ob1_iprobe.c:74), but it > feels like this is wrong. I looked to the MPI standard for some insight, but > could not find where it addresses the return code of MPI_Probe. > > Can anyone shed some light on this topic for me? > > Thanks, > Josh > > > ------------------------------------ > Joshua Hursey > Postdoctoral Research Associate > Oak Ridge National Laboratory > http://users.nccs.gov/~jjhursey > > > _______________________________________________ > devel mailing list > de...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/devel "To preserve the freedom of the human mind then and freedom of the press, every spirit should be ready to devote itself to martyrdom; for as long as we may think as we will, and speak as we think, the condition of man will proceed in improvement." -- Thomas Jefferson, 1799
