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<p>Hi, Matt:<br>
</p>
<br>
<div><br>
</div>
> Can you verify that you are running the master branch?<br>
I am not sure, how can I verify this?<br>
And I configure PETSc with this command <br>
"./configure --prefix=$HOME/Install/petsc-openmpi
--with-mpi=/home/leejearl/Install/openmpi/gnu/1.8.4
--download-exodusii=yes --download-netcdf
--with-hdf5-dir=/home/leejearl/Install/hdf5-1.8.14
--download-metis=yes".<br>
Is there some problem? Can you show me your command for configuring
PETSc?<br>
<br>
<br>
Thanks<br>
<br>
leejearl<br>
<br>
<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 2016年08月13日 01:10, Matthew Knepley
wrote:<br>
</div>
<blockquote
cite="mid:CAMYG4GmtHnQiAmWcZ9Pdb2ZMg9M2Pj+14kqnjd5iM4KmzyuRhw@mail.gmail.com"
type="cite">
<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 moz-do-not-send="true"
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
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<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
moz-do-not-send="true"
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
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<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 moz-do-not-send="true"
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
moz-do-not-send="true"
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>
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</blockquote>
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<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>
</blockquote>
<br>
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