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<div class="">On Aug 12, 2016, at 5:41 PM, leejearl <<a href="mailto:leejearl@126.com" class="">leejearl@126.com</a>> wrote:</div>
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<p class="">Hi, Matt:<br class="">
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> Can you verify that you are running the master branch?<br class="">
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<div>cd ${PETSC_DIR}</div>
<div>git branch</div>
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<div>The last command should return something like a list of branch names, and the branch name with an asterisk to the left of it will be the branch you are currently on.</div>
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<div>Geoff</div>
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<div bgcolor="#FFFFFF" text="#000000" class="">I am not sure, how can I verify this?<br class="">
And I configure PETSc with this command <br class="">
"./configure --prefix=$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 class="">
Is there some problem? Can you show me your command for configuring PETSc?<br class="">
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Thanks<br class="">
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leejearl<br class="">
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<div class="moz-cite-prefix">On 2016年08月13日 01:10, Matthew Knepley wrote:<br class="">
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<div class="gmail_quote">On Thu, Aug 11, 2016 at 8:00 PM, leejearl <span dir="ltr" class="">
<<a moz-do-not-send="true" href="mailto:leejearl@126.com" target="_blank" class="">leejearl@126.com</a>></span> wrote:<br class="">
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<p class="">Thank you for your reply. I have attached the code, grid and the error message.</p>
<p class="">cavity.c is the code file, cavity.exo is the grid, and error.dat is the error message.</p>
<p class="">The command is "mpirun -n 2 ./cavity</p>
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<div class="">Can you verify that you are running the master branch? I just ran this and got</div>
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<div class="">DM Object: 2 MPI processes</div>
<div class=""> type: plex</div>
<div class="">DM_0x84000004_0 in 2 dimensions:</div>
<div class=""> 0-cells: 5253 5252</div>
<div class=""> 1-cells: 10352 10350</div>
<div class=""> 2-cells: 5298 (198) 5297 (198)</div>
<div class="">Labels:</div>
<div class=""> ghost: 2 strata of sizes (199, 400)</div>
<div class=""> vtk: 1 strata of sizes (4901)</div>
<div class=""> Cell Sets: 1 strata of sizes (5100)</div>
<div class=""> Face Sets: 3 strata of sizes (53, 99, 50)</div>
<div class=""> depth: 3 strata of sizes (5253, 10352, 5298)</div>
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<div class=""> Thanks,</div>
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<div class=""> Matt</div>
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<div class="">On 2016年08月11日 23:29, Matthew Knepley wrote:<br class="">
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<div class="gmail_quote">On Thu, Aug 11, 2016 at 3:14 AM, leejearl <span dir="ltr" class="">
<<a moz-do-not-send="true" href="mailto:leejearl@126.com" target="_blank" class="">leejearl@126.com</a>></span> wrote:<br class="">
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<p class="">Hi, <br class="">
Thank you for your reply. It help me very much.<br class="">
But, for "/petsc-3.7.2/src/ts/examples/<wbr class="">tutorials/ex11.c", when I set the overlap to 2 levels, the command is
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"mpirun -n 3 ./ex11 -f annulus-20.exo -ufv_mesh_overlap 2 -physics sw", it suffers a error.<br class="">
It seems to me that setting overlap to 2 is very common. Are there issues that I have not take into consideration?<br class="">
Any help are appreciated.</p>
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<div class="">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 class="">unstructured stuff. I have test examples that run fine for overlap > 1. Can you send the entire error message?</div>
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<div class="">If the error is not in the distribution, but rather in the analytics, that is understandable because this example is only</div>
<div class="">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 class="">cells.</div>
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<div class=""> Matt</div>
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leejearl</font></span></p>
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<div class="">On 2016年08月11日 14:57, Julian Andrej wrote:<br class="">
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<div dir="ltr" class="">Hi,
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<div class="">take a look at slide 10 of [1], there is visually explained what the overlap between partitions is.</div>
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<div class="">[1] <a moz-do-not-send="true" href="https://www.archer.ac.uk/training/virtual/files/2015/06-PETSc/slides.pdf" target="_blank" class="">https://www.archer.ac.uk/t<wbr class="">raining/virtual/files/2015/06-<wbr class="">PETSc/slides.pdf</a></div>
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<div class="gmail_quote">On Thu, Aug 11, 2016 at 8:48 AM, leejearl <span dir="ltr" class="">
<<a moz-do-not-send="true" href="mailto:leejearl@126.com" target="_blank" class="">leejearl@126.com</a>></span> wrote:<br class="">
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Hi, all:<br class="">
I want to use PETSc to build my FVM code. Now, I have a question about<br class="">
the function DMPlexDistribute(DM dm, PetscInt overlap, PetscSF *sf, DM *dmOverlap) .<br class="">
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In the example "/petsc-3.7.2/src/ts/examples/<wbr class="">tutorials/ex11.c". When I set the overlap<br class="">
as 0 or 1, it works well. But, if I set the overlap as 2, it suffers a problem.<br class="">
I am confused about the value of overlap. Can it be set as 2? What is the meaning of<br class="">
the parameter overlap?<br class="">
Any helps are appreciated!<span class=""><font color="#888888" class=""><br class="">
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leejearl<br class="">
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<div data-smartmail="gmail_signature" class="">What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br class="">
-- Norbert Wiener</div>
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<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 class="">
-- Norbert Wiener</div>
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