Hi James:
I can reproduce the problem on a single node with Open MPI 1.5 and the trunk.  I have submitted a ticket with
the information.

https://svn.open-mpi.org/trac/ompi/ticket/2656

Rolf

On 12/13/10 18:44, James Dinan wrote:
Hi,

I'm getting strange behavior using datatypes in a one-sided MPI_Accumulate operation.

The attached example performs an accumulate into a patch of a shared 2d matrix.  It uses indexed datatypes and can be built with displacement or absolute indices (hindexed) - both cases fail.  I'm seeing data validation errors, hanging, or other erroneous behavior under OpenMPI 1.5 on Infiniband.  The example works correctly under the current release of MVAPICH on IB and under MPICH on shared memory.

Any help would be greatly appreciated.

Best,
 ~Jim.

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