[petsc-dev] Kokkos initialize

[Mark Adams]

Si it seems like these two calls in cupminit.inc are inconsistent with lazy:

22:41 adams/gamg-reduce-opt-cuda *= ~/petsc$ git grep PetscBeganKokkos
src/sys/objects/cupminit.inc:    PetscBeganKokkos = PETSC_TRUE;
src/sys/objects/cupminit.inc:    PetscBeganKokkos = PETSC_TRUE;

I can do an MR to remove these if that is the case.

Mark

On Thu, Oct 15, 2020 at 8:34 PM Barry Smith <bsmith at petsc.dev> wrote:

>
>
>   I thought the plan was that Kokkos also had a lazy initialization but
> perhaps it does not and needs to be fixed.
>
>   Barry
>
> > On Oct 15, 2020, at 6:49 PM, Mark Adams <mfadams at lbl.gov> wrote:
> >
> > I am running a on SUMMIt with a Kokkos cuda configuration and while
> debugging with ddt I noticed that it spent a long time in KokkosInit, but I
> was not using Kokkos. KokkosInit was call in PETSc's GPU init, which seems
> logical enough, but it would be better if it is not called if you are not
> using Kokkos.
> >
> > I recall seeing places where Kokkos is checked when calling a Kokkos
> method (ie, lazy initialization). Do we have policy on whether we are being
> lazy with KokkosInit or not?
> >
> > Mark
>
>
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