[petsc-users] SUPERLU_DIST in single precision

[Xiaoye S. Li]

Yes. We will wait for his reply.   -Sherry

On Tue, Jul 21, 2020 at 6:30 PM Barry Smith <bsmith at petsc.dev> wrote:

>
>   Thanks Sherry. But the CPU version runs correctly right so if Felix is
> only interested in CPUs then I could give it to him now?
>
>   Barry
>
>
> On Jul 21, 2020, at 7:33 PM, Xiaoye S. Li <xsli at lbl.gov> wrote:
>
> Barry,
>
> We have a macro-ized basefile to produced all 4 precisions for
> SuperLU_DIST. In the past, we didn't generate single precision code, since
> there was no request.
>
> Since now we started working on mixed precision algorithms.  I generated
> single precision code a few weeks ago, and fixed some bugs on the way. A
> few days ago, I nailed down a final bug (hopefully) related to single
> precision SGEMM or STRSM BLAS problems on GPU (i.e., single precision
> cuBLAS error).  All I know is that CPU code is working on Summit, but it
> has computation errors after I enable GPU.    I plan to do some more
> investigation on this before asking Nvidia folks.
>
> I am busy this week, but should get to it next week.  I suggest you wait
> for me to clear this, instead of duplicating the work.
>
> Sherry
>
>
> On Tue, Jul 21, 2020 at 5:22 PM Barry Smith <bsmith at petsc.dev> wrote:
>
>>
>>    Felix,
>>
>>     What are your needs, do you want this for CPUs or for GPUs?  Do you
>> wish to run all your code in single precision or just the SuperLU_Dist
>> solver while the rest of your code double?
>>
>>     If you want to run everything on CPUs using single precision then
>> adding the support is very easy, we can provide that for you any time. The
>> other cases will require more thought.
>>
>>     Barry
>>
>>
>> > On Jul 21, 2020, at 8:58 AM, flw at rzg.mpg.de wrote:
>> >
>> > Dear PETSc support team,
>> > some time ago you told me that you are planning on releasing a version
>> that supports SUPERLU_DIST in single-precision soon. Can you tell me
>> roughly what time frame you had in mind?
>> >
>> > Best regards,
>> > Felix
>> >
>>
>>
>
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