[petsc-users] Nodes Communication - Petsc Vec

[Junchao Zhang]

See Notes at
https://petsc.org/main/docs/manualpages/PetscSF/VecScatterCreate.html

Does it apply to your case?

--Junchao Zhang


On Wed, Feb 16, 2022 at 8:12 AM Medane TCHAKOROM <
medane.tchakorom at univ-fcomte.fr> wrote:

> Re:
>
> I forgot to mention that the nodes are in differents communicators. Does
> VecScatter functionnality still applies ?
>
> Thanks.
> On 16/02/2022 15:03, Matthew Knepley wrote:
>
> On Wed, Feb 16, 2022 at 8:55 AM Medane TCHAKOROM <
> medane.tchakorom at univ-fcomte.fr> wrote:
>
>> Hello,
>>
>> I want to pass a Petsc Vec from one node to another one. Is there any
>> Petsc method for doing this
>>
>
> You likely want the VecScatter functionality. There is a discussion of
> this in the manual:
> https://petsc.org/main/docs/manual/vec/?highlight=vecscatter#sec-unstruct
>
>   Thanks,
>
>     Matt
>
>
>> or should I use MPI_Irecv and MPI_Isend for non-blocking communication ?
>>
>> When using MPI_Isend, can i send a Petsc Vec, or should I get the array
>> from it, and then send it ?
>>
>> Thanks
>>
>>
>
> --
> 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
>
> https://www.cse.buffalo.edu/~knepley/
> <http://www.cse.buffalo.edu/~knepley/>
>
>
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