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On Wed, May 1, 2024 at 3: 34 PM Ferrand, Jesus A. <FERRANJ2@ my. erau. edu> wrote: Dear PETSc team: For a project that I'm working on, I need to manually build a DMPlex. From studying the source code of the various APIs in which the plex
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<div dir="ltr"><div dir="ltr">On Wed, May 1, 2024 at 3:34 PM Ferrand, Jesus A. <<a href="mailto:FERRANJ2@my.erau.edu">FERRANJ2@my.erau.edu</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"><div class="msg-7999592094273355019">
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Dear PETSc team: For a project that I'm working on, I need to manually build a DMPlex. From studying the source code of the various APIs in which the plex is built from some supported file format, I get that the workflow is this: DMPlexSetChart()
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Dear PETSc team:<br>
<br>
For a project that I'm working on, I need to manually build a DMPlex.</div>
<div style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:rgb(0,0,0)">
>From studying the source code of the various APIs in which the plex is built from some supported file format, I get that the workflow is this:</div>
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<br>
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<ol style="margin-top:0px;margin-bottom:0px" start="1">
<li style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:rgb(0,0,0);list-style-type:"1) "">
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DMPlexSetChart() <-- Input nCells + nVerts</div>
</li><li style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:rgb(0,0,0);list-style-type:"2) "">
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DMPlexSetConeSize() <-- Input ConeSize for each point in [0,nCells)</div>
</li><li style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:rgb(0,0,0);list-style-type:"3) "">
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DMSetUp() – Allocates memory internally.</div>
</li><li style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:rgb(0,0,0);list-style-type:"4) "">
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DMPlexGetCones() --> Gives you the memory onto which to write the cell connectivity.</div>
</li><li style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:rgb(0,0,0);list-style-type:"5) "">
<div style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:rgb(0,0,0)">
*Write connectivity*</div>
</li><li style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:rgb(0,0,0);list-style-type:"6) "">
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DMPlexReorderCell() <-- For each point in [0,nCells)</div>
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I'm in a situation where the memory given by step (4) is available a-priori.</div>
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I was hoping to skip steps 2, 3 , and 4 with something like a "DMPlexSetCones()", but such an API does not exist.</div>
<div style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:rgb(0,0,0)">
My current workaround is to implement steps 2 through 4 as always and have double the memory allocated in the interim (my instance + DM's internal instance).</div>
<div style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:rgb(0,0,0)">
I was thinking of looking for the name of the struct member and = it to my memory, but I can't overcome the flag check in DMSetUp() during later calls to DMPlexGetCones() or DMPlexGetTransitiveClosure().</div></div></div></blockquote><div><br></div><div>I do not understand the "flag check". What is that?</div><div><br></div><div>We could make a DMPlexSetCones(), but as you point out, the workflow for DMSetUp() would have to change. Where does the memory come from for your connectivity?</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 class="msg-7999592094273355019"><div dir="ltr">
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<p style="line-height:normal;background-color:white;margin:0px 0px 11px"><span style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:black">Sincerely:</span></p>
<p style="line-height:normal;background-color:white;margin:0px"><span style="font-family:"Courier New",monospace;font-size:14pt;color:red"><b><u>J.A. Ferrand</u></b></span></p>
<p style="line-height:normal;background-color:white;margin:0px"><span style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:black">Embry-Riddle Aeronautical University - Daytona Beach - FL<br>
Ph.D. Candidate, Aerospace Engineering</span></p>
<p style="line-height:normal;background-color:white;margin:0px"><span style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:black">M.Sc. Aerospace Engineering</span></p>
<p style="line-height:normal;background-color:white;margin:0px"><span style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:black">B.Sc. Aerospace Engineering</span></p>
<p style="line-height:normal;background-color:white;margin:0px"><span style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:black">B.Sc. Computational Mathematics</span></p>
<p style="line-height:normal;background-color:white;margin:0px"><span style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:rgb(0,0,0)"><br>
</span></p>
<p style="line-height:normal;background-color:white;margin:0px"><span style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:black"><u>Phone:</u> (386)-843-1829</span></p>
<p style="line-height:normal;background-color:white;margin:0px"><span style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:black"><u>Email(s):</u> <a href="mailto:ferranj2@my.erau.edu" target="_blank">ferranj2@my.erau.edu</a></span></p>
<p style="text-indent:0.5in;line-height:normal;background-color:white;margin:0px">
<span style="font-family:"Times New Roman",Times,serif;font-size:12pt;color:black"> <a href="mailto:jesus.ferrand@gmail.com" target="_blank">jesus.ferrand@gmail.com</a></span></p>
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</div></blockquote></div><br clear="all"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><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="https://urldefense.us/v3/__http://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!ZR1_fNBzyO9hgjbXCkFEbX3CMsLXVmoeah8FCeMOb9AMhbszC-gLvEU6mbq67TLMx9kDRY2b--nt1nRnavyF$" target="_blank">https://www.cse.buffalo.edu/~knepley/</a><br></div></div></div></div></div></div></div></div>