[petsc-users] Kokkos with OpenMP

[Mark Adams]

OK, this running and using OMP Fieldsplit/additive.

Kokkos does not have any solvers hooked up yet, but I have added an LU
interface that just uses AIJ's LU.

Junchao, I asked Kokkos about adding LU and they said that it is on the
todo list. Until they do that I can't use it for the paper, but if you want
to work on integrating solvers into aijkokkos I can do that and test with
GMRES/Jacobi.

Thanks,
Mark

On Mon, Jan 18, 2021 at 1:00 AM Barry Smith <bsmith at petsc.dev> wrote:

>
>   Mark,
>
>   Looks like you tried to do two things at once, you removed the fopenmp
> and put back the --with-cuda.
>
>
>
>   Like I said if you want PETSc to build OpenMP and CUDA you need to
> remove this line (and some others) from kokkos.py
>
>
>
>      if self.openmp.found + pthreadfound + self.cuda.found > 1:
>       raise RuntimeError("Kokkos only supports a single parallel system
> during its configuration")
>
>
>
> On Jan 17, 2021, at 9:39 PM, Mark Adams <mfadams at lbl.gov> wrote:
>
>
>>
>> Here is the problem. You set  --CXXOPTFLAGS="-g -O0 -fPIC  -fopenmp" to
>> indicate how to compile for OpenMP but when ./configure checks the
>> installed KokkosKernel include files it uses CXXPPFLAGS. (Since you
>> provided the flag CXXOPTFLAGS  ./configure never determines the flag to put
>> into CXXPPFLAGS.
>>
>> It is more desirable if you do not provide -fPIC  -fopenmp.  ./configure
>> will figure them out for you.
>>
>
> :(
> <configure.log>
>
>
>
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