[petsc-dev] memory usage with GPUs

[Dave May]

On Friday, 29 July 2016, Barry Smith <bsmith at mcs.anl.gov> wrote:

>
>   Do you know if Nvidia provides an API to determine how much GPU memory
> has been currently allocated?


Yes it does


>
>
>  If it does then that could easily be hooked up in same style as the
> PetscMemory...() routines for example PetscGPUMemory...(). If they don't
> provide an API then obviously there is no way to get that data.
>
>    Barry
>
> > On Jul 27, 2016, at 8:18 PM, Mark Adams <mfadams at lbl.gov <javascript:;>>
> wrote:
> >
> > Note, I wanted to use this for a Petsc code  that uses GPUs but not
> through at Petsc.
> >
> > So my case is a little odd and I did not expect support but I just
> wanted to check.
> >
> > On Wednesday, July 27, 2016, Karl Rupp <rupp at iue.tuwien.ac.at
> <javascript:;>> wrote:
> >
> >    We (meanings someone) should add logging of GPU allocations
> separately.
> >
> > Agreed. I'll do it (though not immediately, as there are other things
> with higher priority to make GPU support in PETSc more useful)
> >
> > Best regards,
> > Karli
> >
> >
> >
> > On Jul 27, 2016, at 1:41 PM, Matthew Knepley <knepley at gmail.com
> <javascript:;>> wrote:
> >
> > No, although since we mirror storage you could get an idea if you broke
> out the GPU vecs into a separate stage.
> >
> >     Matt
> >
> > On Wed, Jul 27, 2016 at 9:05 AM, Mark Adams <mfadams at lbl.gov
> <javascript:;>> wrote:
> > Would/could PETSc memory usage methods (PetscMemoryGetMaximumUsage) pick
> up GPU memory usage?
> >
> >
> >
> >
> > --
> > What most experimenters take for granted before they begin their
> experiments is infinitely more interesting than any results to which their
> experiments lead.
> > -- Norbert Wiener
> >
> >
>
>
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