[petsc-users] PetscSF Fortran interface

[Junchao Zhang]

Hi, Nicholas,
   It seems we have implemented it, but with another name,
PetscSFCreateSectionSFF90, see
https://gitlab.com/petsc/petsc/-/merge_requests/5386
   Try it to see if it works!

--Junchao Zhang


On Tue, Jan 10, 2023 at 11:45 AM Nicholas Arnold-Medabalimi <
narnoldm at umich.edu> wrote:

> Er to be honest I still can't get my stub to compile properly, and I don't
> know how to go about making a merge request. But here is what I am
> attempting right now. Let me know how best to proceed
>
>
> Its not exactly clear to me how to setup up the remote offset properly.
>
> in src/vec/is/sf/interface/ftn-custom/zsf.c
>
> PETSC_EXTERN void petscsfcreatesectionsf(PetscSF *sf, PetscSection
> *rootSection, F90Array1d *aremoteOffsets, PetscSection *leafSection,
> PetscSF *sectionSF, int * ierr PETSC_F90_2PTR_PROTO(remoteoffsetsd))
> {
>
>   int * remoteOffsets;
>   *ierr = F90Array1dAccess(aremoteOffsets, PETSC_INT, (void**)
> &remoteOffsets PETSC_F90_2PTR_PARAM(remoteoffsetsd));if (*ierr) return;
>   *ierr = PetscSFCreateSectionSF(*sf,*rootSection,
> &remoteOffsets,*leafSection,*sectionSF);if (*ierr) return;
>
> }
>
> This is the sticking point.
>
> Sincerely
> Nicholas
>
>
> On Tue, Jan 10, 2023 at 12:38 PM Junchao Zhang <junchao.zhang at gmail.com>
> wrote:
>
>> Hi, Nicholas,
>>   Could you make a merge request to PETSc and then our Fortran experts
>> can comment on your MR?
>>   Thanks.
>>
>> --Junchao Zhang
>>
>>
>> On Tue, Jan 10, 2023 at 11:10 AM Nicholas Arnold-Medabalimi <
>> narnoldm at umich.edu> wrote:
>>
>>> Hi Junchao
>>>
>>> I think I'm almost there, but I could use some insight into how to use
>>> the PETSC_F90_2PTR_PROTO and F90Array1dAccess for the remoteOffset
>>> parameter input so if another function comes up, I can add it myself
>>> without wasting your time.
>>> I am very grateful for your help and time.
>>>
>>> Sincerely
>>> Nicholas
>>>
>>> On Tue, Jan 10, 2023 at 10:55 AM Junchao Zhang <junchao.zhang at gmail.com>
>>> wrote:
>>>
>>>> Hi, Nicholas,
>>>>    I am not a fortran guy, but I will try to add petscsfcreatesectionsf.
>>>>
>>>>    Thanks.
>>>> --Junchao Zhang
>>>>
>>>>
>>>> On Tue, Jan 10, 2023 at 12:50 AM Nicholas Arnold-Medabalimi <
>>>> narnoldm at umich.edu> wrote:
>>>>
>>>>> I think it should be something like this, but I'm not very fluent in
>>>>> Fortran C interop syntax. Any advice would be appreciated. Thanks
>>>>>
>>>>> PETSC_EXTERN void petscsfcreatesectionsf(PetscSF *sf, PetscSection *
>>>>> rootSection, F90Array1d *aremoteOffsets, PetscSection *leafSection,
>>>>> PetscSF *sectionSF, int * ierr PETSC_F90_2PTR_PROTO(remoteoffsetsd))
>>>>> {
>>>>>
>>>>>   int * remoteOffsets;
>>>>>   *ierr = F90Array1dAccess(aremoteOffsets, PETSC_INT, (void**) &
>>>>> remoteOffsets PETSC_F90_2PTR_PARAM(remoteoffsetsd));if (*ierr) return;
>>>>>   *ierr = PetscSFCreateSectionSF(*sf,*rootSection, &remoteOffsets,*
>>>>> leafSection,*sectionSF);if (*ierr) return;
>>>>>
>>>>> }
>>>>>
>>>>> On Mon, Jan 9, 2023 at 11:41 PM Nicholas Arnold-Medabalimi <
>>>>> narnoldm at umich.edu> wrote:
>>>>>
>>>>>> Hi Junchao
>>>>>>
>>>>>> Thanks again for your help in November. I've been using the your
>>>>>> merge request branch quite heavily. Would it be possible to add a
>>>>>> petscsfcreatesectionsf interface as well?
>>>>>> I'm trying to write it myself using your commits as a guide but I
>>>>>> have been struggling with handling the section parameter properly.
>>>>>>
>>>>>> Sincerely
>>>>>> Nicholas
>>>>>>
>>>>>> On Sat, Nov 19, 2022 at 9:44 PM Junchao Zhang <
>>>>>> junchao.zhang at gmail.com> wrote:
>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On Sat, Nov 19, 2022 at 8:05 PM Nicholas Arnold-Medabalimi <
>>>>>>> narnoldm at umich.edu> wrote:
>>>>>>>
>>>>>>>> Hi
>>>>>>>>
>>>>>>>> Thanks, this is awesome. Thanks for the very prompt fix. Just one
>>>>>>>> question: will the array outputs on the fortran side copies (and need to be
>>>>>>>> deallocated) or direct access to the dmplex?
>>>>>>>>
>>>>>>> Direct access to internal data;  no need to deallocate
>>>>>>>
>>>>>>>
>>>>>>>>
>>>>>>>> Sincerely
>>>>>>>> Nicholas
>>>>>>>>
>>>>>>>> On Sat, Nov 19, 2022 at 8:21 PM Junchao Zhang <
>>>>>>>> junchao.zhang at gmail.com> wrote:
>>>>>>>>
>>>>>>>>> Hi, Nicholas,
>>>>>>>>>   See this MR,
>>>>>>>>> https://gitlab.com/petsc/petsc/-/merge_requests/5860
>>>>>>>>>   It is in testing, but you can try branch
>>>>>>>>> jczhang/add-petscsf-fortran to see if it works for you.
>>>>>>>>>
>>>>>>>>>   Thanks.
>>>>>>>>> --Junchao Zhang
>>>>>>>>>
>>>>>>>>> On Sat, Nov 19, 2022 at 4:16 PM Nicholas Arnold-Medabalimi <
>>>>>>>>> narnoldm at umich.edu> wrote:
>>>>>>>>>
>>>>>>>>>> Hi Junchao
>>>>>>>>>>
>>>>>>>>>> Thanks. I was wondering if there is any update on this. I may
>>>>>>>>>> write a small interface for those two routines myself in the interim but
>>>>>>>>>> I'd appreciate any insight you have.
>>>>>>>>>>
>>>>>>>>>> Sincerely
>>>>>>>>>> Nicholas
>>>>>>>>>>
>>>>>>>>>> On Wed, Nov 16, 2022 at 10:39 PM Junchao Zhang <
>>>>>>>>>> junchao.zhang at gmail.com> wrote:
>>>>>>>>>>
>>>>>>>>>>> Hi, Nicholas,
>>>>>>>>>>>   I will have a look and get back to you.
>>>>>>>>>>>   Thanks.
>>>>>>>>>>> --Junchao Zhang
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On Wed, Nov 16, 2022 at 9:27 PM Nicholas Arnold-Medabalimi <
>>>>>>>>>>> narnoldm at umich.edu> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Hi Petsc Users
>>>>>>>>>>>>
>>>>>>>>>>>> I'm in the process of adding some Petsc for mesh management
>>>>>>>>>>>> into an existing Fortran Solver. It has been relatively straightforward so
>>>>>>>>>>>> far but I am running into an issue with using PetscSF routines. Some like
>>>>>>>>>>>> the PetscSFGetGraph work no problem but a few of my routines require the
>>>>>>>>>>>> use of PetscSFGetLeafRanks and PetscSFGetRootRanks and those don't seem to
>>>>>>>>>>>> be in the fortran interface and I just get a linking error. I also don't
>>>>>>>>>>>> seem to see a PetscSF file in the finclude. Any clarification or assistance
>>>>>>>>>>>> would be appreciated.
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> Sincerely
>>>>>>>>>>>> Nicholas
>>>>>>>>>>>>
>>>>>>>>>>>> --
>>>>>>>>>>>> Nicholas Arnold-Medabalimi
>>>>>>>>>>>>
>>>>>>>>>>>> Ph.D. Candidate
>>>>>>>>>>>> Computational Aeroscience Lab
>>>>>>>>>>>> University of Michigan
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> Nicholas Arnold-Medabalimi
>>>>>>>>>>
>>>>>>>>>> Ph.D. Candidate
>>>>>>>>>> Computational Aeroscience Lab
>>>>>>>>>> University of Michigan
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> Nicholas Arnold-Medabalimi
>>>>>>>>
>>>>>>>> Ph.D. Candidate
>>>>>>>> Computational Aeroscience Lab
>>>>>>>> University of Michigan
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>> --
>>>>>> Nicholas Arnold-Medabalimi
>>>>>>
>>>>>> Ph.D. Candidate
>>>>>> Computational Aeroscience Lab
>>>>>> University of Michigan
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Nicholas Arnold-Medabalimi
>>>>>
>>>>> Ph.D. Candidate
>>>>> Computational Aeroscience Lab
>>>>> University of Michigan
>>>>>
>>>>
>>>
>>> --
>>> Nicholas Arnold-Medabalimi
>>>
>>> Ph.D. Candidate
>>> Computational Aeroscience Lab
>>> University of Michigan
>>>
>>
>
> --
> Nicholas Arnold-Medabalimi
>
> Ph.D. Candidate
> Computational Aeroscience Lab
> University of Michigan
>
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