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<span style="font-family:monospace;font-size:14px;background-color:rgb(255, 255, 255);display:inline !important">PCFactorSetMatSolverType(pc,MATSOLVERMUMPS);</span><br>
<span style="font-family:monospace;font-size:14px;background-color:rgb(255, 255, 255);display:inline !important"> PCFactorSetUpMatSolverType(pc); </span><br style="font-family:monospace;font-size:14px;background-color:rgb(255, 255, 255)">
<span style="font-family:monospace;font-size:14px;background-color:rgb(255, 255, 255);display:inline !important"> PCFactorGetMatrix(pc,&F);</span><br>
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<span style="font-family:monospace;font-size:14px;background-color:rgb(255, 255, 255);display:inline !important"> MatLUFactorSymbolic(F,A,...)<br>
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<span style="font-family:monospace;font-size:14px;background-color:rgb(255, 255, 255);display:inline !important"> You must provide row and column permutations etc, petsc/src/mat/tests/ex125.c may give you a clue on how to get these inputs.</span></div>
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<span style="font-family:monospace;font-size:14px;background-color:rgb(255, 255, 255);display:inline !important">Hong</span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> petsc-users <petsc-users-bounces@mcs.anl.gov> on behalf of Junchao Zhang <junchao.zhang@gmail.com><br>
<b>Sent:</b> Wednesday, January 12, 2022 9:03 AM<br>
<b>To:</b> Varun Hiremath <varunhiremath@gmail.com><br>
<b>Cc:</b> Peder Jørgensgaard Olesen via petsc-users <petsc-users@mcs.anl.gov><br>
<b>Subject:</b> Re: [petsc-users] PETSc MUMPS interface</font>
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<div dir="ltr">Calling PCSetUp() before KSPSetUp()?
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<div dir="ltr">--Junchao Zhang</div>
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<div dir="ltr" class="x_gmail_attr">On Wed, Jan 12, 2022 at 3:00 AM Varun Hiremath <<a href="mailto:varunhiremath@gmail.com">varunhiremath@gmail.com</a>> wrote:<br>
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<div dir="ltr">Hi All,
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<div>I want to collect MUMPS memory estimates based on the initial symbolic factorization analysis before the actual numerical factorization starts to check if the estimated memory requirements fit the available memory.</div>
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<div>I am following the steps from <a href="https://petsc.org/main/src/ksp/ksp/tutorials/ex52.c.html" target="_blank">
https://petsc.org/main/src/ksp/ksp/tutorials/ex52.c.html</a></div>
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<font face="monospace"> PCFactorSetMatSolverType(pc,MATSOLVERMUMPS);<br>
PCFactorSetUpMatSolverType(pc); <br>
PCFactorGetMatrix(pc,&F);<br>
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KSPSetUp(ksp);<br>
MatMumpsGetInfog(F,...)</font>
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<div><font face="arial, sans-serif">But it appears </font><font face="monospace">KSPSetUp
</font><font face="arial, sans-serif">calls both symbolic and numerical factorization. So is there some other way to get these statistics before the actual factorization starts?</font></div>
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<div><font face="arial, sans-serif">Thanks,</font></div>
<div><font face="arial, sans-serif">Varun</font></div>
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