[petsc-users] [EXTERNAL] Re: Initializing kokkos before petsc causes a problem

[Junchao Zhang]

Hi, Philip,
   It's my fault.  I should follow up early that this problem was fixed by
https://gitlab.com/petsc/petsc/-/merge_requests/6586.
   Could you try petsc/main?

   Thanks.
--Junchao Zhang


On Tue, Jun 27, 2023 at 9:30 AM Fackler, Philip <facklerpw at ornl.gov> wrote:

> Good morning Junchao! I'm following up here to see if there is any update
> to petsc to resolve this issue, or if we need to come up with a work-around.
>
> Thank you,
>
>
> *Philip Fackler *
> Research Software Engineer, Application Engineering Group
> Advanced Computing Systems Research Section
> Computer Science and Mathematics Division
> *Oak Ridge National Laboratory*
> ------------------------------
> *From:* Junchao Zhang <junchao.zhang at gmail.com>
> *Sent:* Wednesday, June 7, 2023 22:45
> *To:* Fackler, Philip <facklerpw at ornl.gov>
> *Cc:* petsc-users at mcs.anl.gov <petsc-users at mcs.anl.gov>; Blondel, Sophie <
> sblondel at utk.edu>; xolotl-psi-development at lists.sourceforge.net <
> xolotl-psi-development at lists.sourceforge.net>
> *Subject:* [EXTERNAL] Re: [petsc-users] Initializing kokkos before petsc
> causes a problem
>
> Hi, Philip,
>   Thanks for reporting. I will have a look at the issue.
> --Junchao Zhang
>
>
> On Wed, Jun 7, 2023 at 9:30 AM Fackler, Philip via petsc-users <
> petsc-users at mcs.anl.gov> wrote:
>
> I'm encountering a problem in xolotl. We initialize kokkos before
> initializing petsc. Therefore...
>
> The pointer referenced here:
>
> https://gitlab.com/petsc/petsc/-/blob/main/src/vec/is/sf/impls/basic/kokkos/sfkok.kokkos.cxx#L363
> <https://urldefense.us/v2/url?u=https-3A__gitlab.com_petsc_petsc_-2D_blob_main_src_vec_is_sf_impls_basic_kokkos_sfkok.kokkos.cxx-23L363&d=DwMFaQ&c=v4IIwRuZAmwupIjowmMWUmLasxPEgYsgNI-O7C4ViYc&r=DAkLCjn8leYU-uJ-kfNEQMhPZWx9lzc4d5KgIR-RZWQ&m=mm5WnvW66V9aFezISyisTVEya_MgbI4YjpAuorp4BHdklRfAD8kTzaDBY3VlzI-4&s=i_BmubxwJ4005UQUtS2UbTyKmZwbDAq7aIfA-T4Gnsg&e=>
>
> <https://urldefense.us/v2/url?u=https-3A__gitlab.com_petsc_petsc_-2D_blob_main_include_petsc-5Fkokkos.hpp&d=DwMFaQ&c=v4IIwRuZAmwupIjowmMWUmLasxPEgYsgNI-O7C4ViYc&r=DAkLCjn8leYU-uJ-kfNEQMhPZWx9lzc4d5KgIR-RZWQ&m=mm5WnvW66V9aFezISyisTVEya_MgbI4YjpAuorp4BHdklRfAD8kTzaDBY3VlzI-4&s=DWQqfHRdrciXObsAIEgF4mGXbMH1xx2vIpcM07ncznU&e=>
>
> from here:
> https://gitlab.com/petsc/petsc/-/blob/main/include/petsc_kokkos.hpp
> <https://urldefense.us/v2/url?u=https-3A__gitlab.com_petsc_petsc_-2D_blob_main_include_petsc-5Fkokkos.hpp&d=DwMFaQ&c=v4IIwRuZAmwupIjowmMWUmLasxPEgYsgNI-O7C4ViYc&r=DAkLCjn8leYU-uJ-kfNEQMhPZWx9lzc4d5KgIR-RZWQ&m=mm5WnvW66V9aFezISyisTVEya_MgbI4YjpAuorp4BHdklRfAD8kTzaDBY3VlzI-4&s=DWQqfHRdrciXObsAIEgF4mGXbMH1xx2vIpcM07ncznU&e=>
>
> remains null because the code to initialize it is skipped here:
>
> https://gitlab.com/petsc/petsc/-/blob/main/src/sys/objects/kokkos/kinit.kokkos.cxx#L28
> <https://urldefense.us/v2/url?u=https-3A__gitlab.com_petsc_petsc_-2D_blob_main_src_sys_objects_kokkos_kinit.kokkos.cxx-23L28&d=DwMFaQ&c=v4IIwRuZAmwupIjowmMWUmLasxPEgYsgNI-O7C4ViYc&r=DAkLCjn8leYU-uJ-kfNEQMhPZWx9lzc4d5KgIR-RZWQ&m=mm5WnvW66V9aFezISyisTVEya_MgbI4YjpAuorp4BHdklRfAD8kTzaDBY3VlzI-4&s=qjM7d6j2BTI04hPQnjucl2H1osvGvortk9kn9e20Hww&e=>
> See line 71.
>
> Can this be modified to allow for kokkos to have been initialized by the
> application before initializing petsc?
>
> Thank you for your help,
>
>
> *Philip Fackler *
> Research Software Engineer, Application Engineering Group
> Advanced Computing Systems Research Section
> Computer Science and Mathematics Division
> *Oak Ridge National Laboratory*
>
>
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