Alberto,
We don't have such a routine yet, but we should and it would not be
terribly difficult to implement (using pieces of PETSc that already exist and
cut and pasting them into a new function MatCreateSeqAICUSPARSEWithArrays()).
Barry
> On Jan 13, 2026, at 1:44 PM, Alberto Cattaneo via petsc-users
> <[email protected]> wrote:
>
> Greetings
> I hope this email reaches you all well. I was wondering whether it was
> possible to create PETSc mat objects directly from data that exists on the
> GPU in AIJ format without copying? For example, either via DLPack or just an
> assurance that the pointer provided to a creation method is in the needed AIJ
> format? Ideally, I'd like to be able to build a PETSc AIJCUSPARSE object out
> of data created by another program. I know there are a few builder methods
> and paradigms, but I'm a bit confused as to which would be ideal in this
> circumstance since in some sense the matrix is already created in memory,
> just not as a PETSc object.
> Thank you for your assistance, please let me know if I should provide more
> information.
> Respectfully:
> Alberto Cattaneo
