[petsc-users] PetscSFReduceBegin does not work correctly on openmpi-1.4.3with64 integers

[fdkong]

>Open MPI one-sided operations with datatypes still have known bugs. They
>have had bug report s with reduced test cases for several years now. They
>need to fix those bugs. Please let them know that you are also waiting...


>To work around that, and for other reasons, I will write a new SF
>implementation using point-to-point.


How long will it take for you to rewrite SF implementation using p2p?  But now, I want to complete a project that needs my current code. Could you please tell how to work around the issue related with the function PetscSFReduceBegin?  Or could you please first modify the PetscSFReduceBegin?


And there are other problems, when you write new SF. Maybe the DMComplex and PetscSection will be changed. Because both objects use the SF for communication.


>>On Sep 11, 2012 12:44 PM, "fdkong" <fd.kong at foxmail.com> wrote:
> 
> >Hi Matt,
>>
> >Thanks. I guess there are two reasons:
>>
> >(1) The MPI function MPI_Accumulate with operation MPI_RELACE is not
> >supported in the implementation of OpenMPI 1.4.3. or other OpenMPI versions.
>>
> > (2) The MPI function dose not accept the datatype MPIU_2INT, when we use
> >64-bit integers.  But when we run on MPICH, it works well!
>>
> >------------------
>> Fande Kong
> >ShenZhen Institutes of Advanced Technology
>> Chinese Academy of Sciences
>>
>> **
>>
>>
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