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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Dear PETSc folks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I have a strange observation on using MatLUFactorNumeric() for dense matrices at different order N. Here is the situation I have:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I use ./src/mat/tests/ex137.c as an example to direct PETSc in selecting superLU-dist and mumps. The calling sequence is
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">MatGetOrdering(A,…)<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">MatGetFactor(A,…)<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">MatLUFactorSymbolic(F, A,…)<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">MatLUFactorNumeric</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">(F, A,…)<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">MatSolve(F,b,x)<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I have three dense matrices A at three different dimensions: N=75, 2028 and 21180.
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The calling sequence works for N=75 and 2028. But when N=21180, the program hanged up when calling
<b>MatLUFactorNumeric</b>(…). Seemed to be a segmentation fault with the following error message:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.5in"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">[1]PETSC ERROR: --------------------- Error Message ------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">[1]PETSC ERROR: Signal received!<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Does anybody have similar experience on that?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks a lot!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Jinquan<o:p></o:p></span></p>
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