[Trilinos-Users] [EXTERNAL] 64bit indices in Hypre, Superlu-Dist and Metis/Parmetis

[Hoemmen, Mark]

Compatibility between Hypre and Trilinos falls under xSDK’s jurisdiction.  My guess is that Hypre, like PETSc, has a configure-time option to pick the global index type.  It’s a bit unreasonable to expect xSDK to cover all possible combinations of configure-time options of all possible libraries that it links together, but if this is a common combination that people want to exercise, it would be best to file this as an xSDK issue.

mfh

On 2/23/17, 8:21 AM, "Prokopenko, Andrey V." <prokopenkoav at ornl.gov> wrote:

>There was an effort to allow Epetra with 64-bit indices. So, technically 
>most Epetra classes are now templated on the index type.
>
>I think the conversion mainly touched widely used classes. I don't think 
>it has 100% coverage. Looking at the code Denis mentioned, some of the 
>required classes there were not converted, and thus are not compatible. 
>I am not certain of an amount of effort required to do that.
>
>-Andrey
>
>On 02/23/2017 08:17 AM, Klinvex, Alicia Marie wrote:
>> Hello Denis,
>>
>> Since Epetra isn't templated, I'm not sure I see a way to support 64bit ints in that hypre interface.  (CCed Mark in case he has some ideas.)  We should be able to support it in the tpetra-based interface though, if you're interested in that one.
>>
>> Best wishes,
>> Alicia
>>
>> -----Original Message-----
>> From: Trilinos-Users [mailto:trilinos-users-bounces at trilinos.org] On Behalf Of Denis Davydov
>> Sent: Thursday, February 23, 2017 5:14 AM
>> To: trilinos-users <trilinos-users at trilinos.org>
>> Subject: [EXTERNAL] [Trilinos-Users] 64bit indices in Hypre, Superlu-Dist and Metis/Parmetis
>>
>> Dear all,
>>
>> I am building a stack (with 64bit indices) composed of PETSc, Trilinos, Superlu-Dist, Metis, etc and came across the following compiler error in EpetraExt:
>>
>> /home/user/spack/var/spack/stage/trilinos-12.10.1-kgdtcmcwce6xhetukputhnh2f7v4sljf/Trilinos-trilinos-release-12-10-1/packages/epetraext/src/hypre/EpetraExt_HypreIJMatrix.cpp:91:96: error: cannot convert ‘int*’ to ‘HYPRE_Int* {aka long long int*}’ for argument ‘3’ to ‘HYPRE_Int HYPRE_ParCSRMatrixGetRow(HYPRE_ParCSRMatrix, HYPRE_Int, HYPRE_Int*, HYPRE_Int**, HYPRE_Complex**)’
>>       ierr += HYPRE_ParCSRMatrixGetRow(ParMatrix_, i+MyRowStart_, &num_entries, &indices, &values);
>>                                                                                                  ^
>>
>> That’s of course because if PETSc is built with 64bit ints, then Hypre have to be also built accordingly.
>>
>> So what are the requirements from Trilinos side on those dependencies? Can it not be built against Hypre or Superlu-Dist when those packages are configured with —enable-biginit and -D_LONGINT, respectively?
>> Or is it a bug in EpetraExt?
>>
>> Regards,
>> Denis.
>>
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