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<p class="MsoNormal"><font size="1" face="Arial"><span lang="EN-US" style="font-size:
9.0pt;font-family:Arial">DA,
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" face="Arial"><span lang="EN-US" style="font-size:
9.0pt;font-family:Arial"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="1" face="Arial"><span lang="EN-US" style="font-size:
9.0pt;font-family:Arial">I’m using PETSc ILU(1)+GMRES to solve an QP problem. But the job may hang at “MatLUFactorNumeric_SeqAIJ()” for long time.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" face="Arial"><span lang="EN-US" style="font-size:
9.0pt;font-family:Arial"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="1" face="Arial"><span lang="EN-US" style="font-size:
9.0pt;font-family:Arial">(gdb) bt<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" face="Arial"><span lang="EN-US" style="font-size:
9.0pt;font-family:Arial">#0 0x0000000002284520 in MatLUFactorNumeric_SeqAIJ ()<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" face="Arial"><span lang="EN-US" style="font-size:
9.0pt;font-family:Arial">#1 0x0000000002265f89 in MatLUFactorNumeric ()<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" face="Arial"><span lang="EN-US" style="font-size:
9.0pt;font-family:Arial">#2 0x0000000002342ff3 in PCSetUp_ILU ()<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" face="Arial"><span lang="EN-US" style="font-size:
9.0pt;font-family:Arial">#3 0x00000000024f8d65 in PCSetUp ()<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" face="Arial"><span lang="EN-US" style="font-size:
9.0pt;font-family:Arial">#4 0x0000000002362964 in KSPSetUp ()<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" face="Arial"><span lang="EN-US" style="font-size:
9.0pt;font-family:Arial">#5 0x0000000002363455 in KSPSolve ()<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" face="Arial"><span lang="EN-US" style="font-size:
9.0pt;font-family:Arial"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="1" face="Arial"><span lang="EN-US" style="font-size:
9.0pt;font-family:Arial">Do you have idea for such phenomenon?<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" face="Arial"><span lang="EN-US" style="font-size:
9.0pt;font-family:Arial"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="1" face="Arial"><span lang="EN-US" style="font-size:
9.0pt;font-family:Arial">Thanks,<o:p></o:p></span></font></p>
<p class="MsoNormal"><st1:PersonName w:st="on"><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt;font-family:Arial">De</span></font></st1:PersonName><font size="1" face="Arial"><span lang="EN-US" style="font-size:9.0pt;font-family:Arial">bao<o:p></o:p></span></font></p>
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