[mvapich-discuss] Datatypes Error

[Dhabaleswar Panda]

Jim,

Thanks for your report. We will take a look at it. Can you verify that
your application/testcase works with MPICH2 1.2.1p1 (not the latest MPICH2
1.3.1). MVAPICH2 1.6RC1 is based on MPICH2 1.2.1p1. If it is working with
MPICH2 1.2.1p1, we might be able to nail down the issue further and fix it
in the final release of MVAPICH2 1.6.

Thanks,

DK

On Tue, 14 Dec 2010, James Dinan wrote:

> Hi,
>
> I've run into an error using MPI datatypes on MVAPICH-2 1.6rc1 on our IB
> cluster.  I've attached a test case that uses datatypes to do a
> one-sided gather via an MPI_Get with datatypes.  The program builds two
> datatypes (origin and target) to transfer a patch of a 2d array into a
> local buffer.  For transfers smaller than ~16kB
> (SUB_XDIM*SUB_YDIM*sizeof(double) < 16384) the program works, when
> larger it fails with no error messages.
>
> I tried using the datatype only for the remote data (included in a
> comment) and saw the same type of failure.  I didn't see any errors
> running this test under the latest version of MPICH.
>
> Thanks for your help,
>   ~Jim.
>