Thanks Junchao,
I issued https://github.com/open-mpi/ompi/pull/6782 in order to fix this
(and the alltoallw variant as well)
Meanwhile, you can manually download and apply the patch at
https://github.com/open-mpi/ompi/pull/6782.patch
Cheers,
Gilles
On 6/28/2019 1:10 PM, Zhang, Junchao via users wrote:
Hello,
When I do MPI_Neighbor_alltoallv or MPI_Ineighbor_alltoallv, I find
when either outdegree or indegree is zero, OpenMPI will return an
error. The suspicious code is at pneighbor_alltoallv.c /
pineighbor_alltoallv.c
101 } else if ((NULL == sendcounts) || (NULL == sdispls) ||
102 (NULL == recvcounts) || (NULL == rdispls) ||
103 MPI_IN_PLACE == sendbuf || MPI_IN_PLACE == recvbuf) {
104 return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_ARG,
FUNC_NAME);
105 }
Apparently, the counts, displs error-checking should only be done
when degree != 0.
Thanks.
--Junchao Zhang
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