<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Thu, Aug 11, 2016 at 8:00 PM, leejearl <span dir="ltr"><<a href="mailto:leejearl@126.com" target="_blank">leejearl@126.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<p>Thank you for your reply. I have attached the code, grid and the
error message.</p>
<p>cavity.c is the code file, cavity.exo is the grid, and error.dat
is the error message.</p>
<p>The command is "mpirun -n 2 ./cavity</p></div></blockquote><div><br></div><div>Can you verify that you are running the master branch? I just ran this and got</div><div><br></div><div><div>DM Object: 2 MPI processes</div><div> type: plex</div><div>DM_0x84000004_0 in 2 dimensions:</div><div> 0-cells: 5253 5252</div><div> 1-cells: 10352 10350</div><div> 2-cells: 5298 (198) 5297 (198)</div><div>Labels:</div><div> ghost: 2 strata of sizes (199, 400)</div><div> vtk: 1 strata of sizes (4901)</div><div> Cell Sets: 1 strata of sizes (5100)</div><div> Face Sets: 3 strata of sizes (53, 99, 50)</div><div> depth: 3 strata of sizes (5253, 10352, 5298)</div></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"><div bgcolor="#FFFFFF" text="#000000">
<div>On 2016年08月11日 23:29, Matthew Knepley
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div class="gmail_extra">
<div class="gmail_quote">On Thu, Aug 11, 2016 at 3:14 AM,
leejearl <span dir="ltr"><<a href="mailto:leejearl@126.com" target="_blank">leejearl@126.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<p>Hi, <br>
Thank you for your reply. It help me very much.<br>
But, for "/petsc-3.7.2/src/ts/examples/<wbr>tutorials/ex11.c",
when I set the overlap to 2 levels, the command is <br>
"mpirun -n 3 ./ex11 -f annulus-20.exo
-ufv_mesh_overlap 2 -physics sw", it suffers a error.<br>
It seems to me that setting overlap to 2 is very
common. Are there issues that I have not take into
consideration?<br>
Any help are appreciated.</p>
</div>
</blockquote>
<div>I will check this out. I have not tested an overlap of
2 here since I generally use nearest neighbor FV methods
for</div>
<div>unstructured stuff. I have test examples that run fine
for overlap > 1. Can you send the entire error message?</div>
<div><br>
</div>
<div>If the error is not in the distribution, but rather in
the analytics, that is understandable because this example
is only</div>
<div>intended to be run using a nearest neighbor FV method,
and thus might be confused if we give it two layers of
ghost</div>
<div>cells.</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">
<div bgcolor="#FFFFFF" text="#000000">
<p><span><font color="#888888"><br>
leejearl</font></span></p>
<div>
<div> <br>
<div>On 2016年08月11日 14:57, Julian Andrej wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hi,
<div><br>
</div>
<div>take a look at slide 10 of [1], there is
visually explained what the overlap between
partitions is.</div>
<div><br>
</div>
<div>[1] <a href="https://www.archer.ac.uk/training/virtual/files/2015/06-PETSc/slides.pdf" target="_blank">https://www.archer.ac.uk/t<wbr>raining/virtual/files/2015/06-<wbr>PETSc/slides.pdf</a></div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Thu, Aug 11, 2016 at
8:48 AM, leejearl <span dir="ltr"><<a href="mailto:leejearl@126.com" target="_blank">leejearl@126.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi, all:<br>
I want to use PETSc to build my FVM
code. Now, I have a question about<br>
the function DMPlexDistribute(DM dm,
PetscInt overlap, PetscSF *sf, DM
*dmOverlap) .<br>
<br>
In the example
"/petsc-3.7.2/src/ts/examples/<wbr>tutorials/ex11.c".
When I set the overlap<br>
as 0 or 1, it works well. But, if I set the
overlap as 2, it suffers a problem.<br>
I am confused about the value of
overlap. Can it be set as 2? What is the
meaning of<br>
the parameter overlap?<br>
Any helps are appreciated!<span><font color="#888888"><br>
<br>
leejearl<br>
<br>
<br>
<br>
</font></span></blockquote>
</div>
<br>
</div>
</blockquote>
<br>
</div>
</div>
</div>
</blockquote>
</div>
<br>
<br clear="all"><span class=""><font color="#888888">
<div><br>
</div>
-- <br>
<div data-smartmail="gmail_signature">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>
</font></span></div>
</div>
</blockquote>
<br>
</div>
</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature">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></div>