[petsc-dev] Kokkos error on SUMMIT

[Junchao Zhang]

On Fri, Oct 2, 2020 at 3:02 PM Junchao Zhang <junchao.zhang at gmail.com>
wrote:

>
>
> On Fri, Oct 2, 2020 at 2:59 PM Mark Adams <mfadams at lbl.gov> wrote:
>
>>
>>
>> On Fri, Oct 2, 2020 at 3:15 PM Barry Smith <bsmith at petsc.dev> wrote:
>>
>>>
>>>   Mark,
>>>
>>>   Looks like you are building Kokkos without CUDA.
>>
>>
>> Yes. This is a CPU build of Kokkos.
>>
>>
>>> You don't have --with-cuda on configure line that is used by Kokkos to
>>> determine what version to build.
>>>
>>>   Junchao,
>>>
>>>   I guess you need to test Kokkos Kernels without CUDA and HIP and make
>>> a few changes.
>>>
>>
>> I'm trying with OpenMP right now. If you want CPU runs then asking for
>> OMP is not terrible.
>>
>>
> That is an interesting feature of Kokkos.
>
By the design, even 'device' memory is now the host memory. The computation
is still diverted to Kokkos backend.  In other words, petsc supports
multithreading through Kokkos.


>
>
>>
>>>   Barry
>>>
>>>
>>>
>>>
>>> #if defined(PETSC_HAVE_CUDA)
>>>   #define WaitForKokkos() PetscCUDASynchronize ? (Kokkos::fence(),0) : 0;
>>> #elif defined(PETSC_HAVE_HIP)
>>>   #define WaitForKokkos() PetscHIPSynchronize ? (Kokkos::fence(),0) : 0;
>>> #endif
>>>
>>>
>>>
>>> > On Oct 2, 2020, at 11:47 AM, Mark Adams <mfadams at lbl.gov> wrote:
>>> >
>>> >
>>> > <configure.log><make.log>
>>>
>>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20201002/7fc42f24/attachment.html>