Re: [OMPI devel] [EXTERNAL] regression: MPI_Neighbor_alltoall with empty graph

2016-11-12 Thread Ibanez, Daniel Alejandro
I just confirmed that git tag v1.10.4 runs this program without error. Unfortunately I gave up on git bisection due to the highly nonlinear nature of the github.com/open-mpi/ompi repository and the failure of several commits to even configure. I also recorded this as github issue #2402: h

Re: [OMPI devel] regression: MPI_Neighbor_alltoall with empty graph

2016-11-12 Thread Pritchard Jr., Howard
Hi Daniel, Thanks very much for trying 2.0.1 out and reporting this. Looks like this may be a case of not checking “edge” cases in the use of this collective. Would you please open an issue? There is currently an issue 2324 related to neighbor collectives, but it isn’t directly related to the pr

[OMPI devel] regression: MPI_Neighbor_alltoall with empty graph

2016-11-12 Thread Ibanez, Daniel Alejandro
Hello, I'd like to report a bug with OpenMPI version 2.0.1. Attached to this email is a C program that runs with only one MPI rank, uses MPI_Dist_graph_create to create a graph topology with no communication edges, and then uses MPI_Neighbor_alltoall with that graph topology. This results in