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<p>Re:</p>
<p>I'am currently going through the code.<br>
</p>
<p>Thans<br>
</p>
<div class="moz-cite-prefix">On 16/02/2022 16:47, Junchao Zhang
wrote:<br>
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cite="mid:CA+MQGp-wD-SQ39BXm0+GW1nh_58AcrecbtX7-w1en4zOR2JEFQ@mail.gmail.com">
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<div dir="ltr"><a
href="https://gitlab.com/petsc/petsc/-/blob/main/src/vec/is/sf/tests/ex9.c"
moz-do-not-send="true" class="moz-txt-link-freetext">https://gitlab.com/petsc/petsc/-/blob/main/src/vec/is/sf/tests/ex9.c</a>
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data-smartmail="gmail_signature">
<div dir="ltr">--Junchao Zhang</div>
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<div dir="ltr" class="gmail_attr">On Wed, Feb 16, 2022 at 9:40
AM Medane TCHAKOROM <<a
href="mailto:medane.tchakorom@univ-fcomte.fr"
moz-do-not-send="true" class="moz-txt-link-freetext">medane.tchakorom@univ-fcomte.fr</a>>
wrote:<br>
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0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p>Re:</p>
<p><br>
</p>
<p>Sorry, but I can't find this file in my installation.
I'am using Petsc 3.14.2</p>
<p><br>
</p>
<p>Thanks<br>
</p>
<div>On 16/02/2022 16:00, Junchao Zhang wrote:<br>
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<blockquote type="cite">
<div dir="ltr">We could still do it. See the example at
petsc/src/vec/is/sf/tests/ex9.c
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<div dir="ltr">
<div dir="ltr">--Junchao Zhang</div>
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<div dir="ltr" class="gmail_attr">On Wed, Feb 16, 2022
at 8:47 AM Medane TCHAKOROM <<a
href="mailto:medane.tchakorom@univ-fcomte.fr"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">medane.tchakorom@univ-fcomte.fr</a>>
wrote:<br>
</div>
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0px 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
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<p>Re:</p>
<p><br>
</p>
<p>It does not apply, because "<span>their
communicator must be on the same set of
processes" .</span></p>
<p>In my case, I have two disjoint subcomm from
PETSC_COMM_WORD with same number of processes.<br>
</p>
<p>I want to send information (Petsc Vec) from one
subcomm to another subcomm.</p>
<p>Thanks<br>
</p>
<div>On 16/02/2022 15:43, Junchao Zhang wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">See Notes at <a
href="https://petsc.org/main/docs/manualpages/PetscSF/VecScatterCreate.html"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://petsc.org/main/docs/manualpages/PetscSF/VecScatterCreate.html</a>
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<div>Does it apply to your case? </div>
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<div dir="ltr">
<div dir="ltr">--Junchao Zhang</div>
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<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Feb
16, 2022 at 8:12 AM Medane TCHAKOROM <<a
href="mailto:medane.tchakorom@univ-fcomte.fr"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">medane.tchakorom@univ-fcomte.fr</a>>
wrote:<br>
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style="margin:0px 0px 0px
0.8ex;border-left:1px solid
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<p>Re:</p>
<p>I forgot to mention that the nodes are in
differents communicators. Does VecScatter
functionnality still applies ?</p>
<p>Thanks.<br>
</p>
<div>On 16/02/2022 15:03, Matthew Knepley
wrote:<br>
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<blockquote type="cite">
<div dir="ltr">
<div dir="ltr">On Wed, Feb 16, 2022 at
8:55 AM Medane TCHAKOROM <<a
href="mailto:medane.tchakorom@univ-fcomte.fr"
target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">medane.tchakorom@univ-fcomte.fr</a>>
wrote:<br>
</div>
<div class="gmail_quote">
<blockquote class="gmail_quote"
style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">Hello,<br>
<br>
I want to pass a Petsc Vec from one
node to another one. Is there any <br>
Petsc method for doing this<br>
</blockquote>
<div><br>
</div>
<div>You likely want the VecScatter
functionality. There is a discussion
of this in the manual: <a
href="https://petsc.org/main/docs/manual/vec/?highlight=vecscatter#sec-unstruct"
target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">https://petsc.org/main/docs/manual/vec/?highlight=vecscatter#sec-unstruct</a></div>
<div><br>
</div>
<div> Thanks,</div>
<div><br>
</div>
<div> Matt</div>
<div> </div>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
or should I use MPI_Irecv and
MPI_Isend for non-blocking
communication ?<br>
<br>
When using MPI_Isend, can i send a
Petsc Vec, or should I get the array
<br>
from it, and then send it ?<br>
<br>
Thanks<br>
<br>
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-- <br>
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<div>What most experimenters
take for granted before
they begin their
experiments is infinitely
more interesting than any
results to which their
experiments lead.<br>
-- Norbert Wiener</div>
<div><br>
</div>
<div><a
href="http://www.cse.buffalo.edu/~knepley/"
target="_blank"
moz-do-not-send="true">https://www.cse.buffalo.edu/~knepley/</a><br>
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