> On Oct 16, 2025, at 1:39 PM, Satish Balay <[email protected]> wrote:
>
> Actually petsc-3.22 (i.e. 3.22.5) is the last version that works with
> nvfortran
Oh, yikes. Sorry for providing the wrong information, definitely work with
3.22.5 to use nvfortran.
Barry
>
> Satish
>
> On Thu, 16 Oct 2025, Barry Smith wrote:
>
>>
>> We recommend using PETSc 3.23.7 if you need to use the Nvidia Fortran
>> compiler. Please try this version. If problems persist, could you send a
>> reproducer as Junchao asked, and we will see if we can resolve the issue?
>>
>> Barry
>>
>>
>>> On Oct 16, 2025, at 12:30 PM, Junchao Zhang <[email protected]> wrote:
>>>
>>> Hi, Herbert,
>>> I don't have much experience on OpenACC and PETSc CI doesn't have such
>>> tests. Could you avoid using nvfortran and instead use gfortran to compile
>>> your Fortran + OpenACC code? If you, then you can use the latest petsc
>>> code and make our debugging easier.
>>> Also, could you provide us with a test and instructions to reproduce the
>>> problem?
>>>
>>> Thanks!
>>> --Junchao Zhang
>>>
>>>
>>> On Thu, Oct 16, 2025 at 5:07 AM howen via petsc-users
>>> <[email protected] <mailto:[email protected]>> wrote:
>>>> Dear All,
>>>>
>>>> I am interfacing our CFD code (Fortran + OpenACC) to Petsc.
>>>> Since we use OpenACC the natural choice for us is to use Nvidia´s nvhpc
>>>> compiler. The Gnu compiler does not work well and we do not have access to
>>>> the Cray compiler.
>>>>
>>>> I already know that the latest version of Petsc does not compile with
>>>> nvhpc, I am therefore using version 3.21.
>>>> I get good results on the CPU both in serial and parallel (MPI). However,
>>>> the GPU implementation, that is what we are interested in, only work
>>>> correctly for the serial version. In parallel, the results are different.
>>>> Even for a CG solve.
>>>>
>>>> I would like to know, if you have experience with the Nvidia compiler. I
>>>> am particularly interested if you have already observed issues with it.
>>>> Your opinion on whether to put further effort into trying to find a bug I
>>>> may have introduced during the interfacing is highly appreciated.
>>>>
>>>> Best,
>>>>
>>>> Herbert Owen
>>>> Senior Researcher, Dpt. Computer Applications in Science and Engineering
>>>> Barcelona Supercomputing Center (BSC-CNS)
>>>> Tel: +34 93 413 4038
>>>> Skype: herbert.owen
>>>>
>>>> https://urldefense.us/v3/__https://scholar.google.es/citations?user=qe5O2IYAAAAJ&hl=en__;!!G_uCfscf7eWS!d2WQKdHf7ZKmQE1-LcWY1bMjyOeWcReCH2MhT18ms2AwaQcqn_NDoozxqOtBhu843jkLZI_l4XEAm8KXBAIb3AY$
>>>>
>>>> <https://urldefense.us/v3/__https://scholar.google.es/citations?user=qe5O2IYAAAAJ&hl=en__;!!G_uCfscf7eWS!abuM7ozzUs7eISYBumHNxpvO2Tuy74KRM4-WWcunXHZVjQf1V032xQrCzTfC5vA_NM-35xMEZ9yJ8XK-3QFqjWBSWuUi$>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>
