[mvapich-discuss] Datatypes Error

[James Dinan]

Hi DK,

The test appears to work correctly on MPICH2 1.2.1p1.

Thanks for your help,
  ~Jim.

On 12/14/2010 07:34 PM, Dhabaleswar Panda wrote:
> 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.
>>
>