<div dir="ltr"><div class="gmail_extra"><div style>/project/k121/sandbox/<span class="il" style="background-image:initial;background-color:rgb(255,255,204)">petsc</span>-dev/externalpackages/MUMPS_4.10.0-p3/src/mumps_part9.F:4666</div>
<div style>/project/k121/sandbox/<span class="il" style="background-image:initial;background-color:rgb(255,255,204)">petsc</span>-dev/externalpackages/MUMPS_4.10.0-p3/src/dmumps_part5.F:465</div><div style>/project/k121/sandbox/<span class="il" style="background-image:initial;background-color:rgb(255,255,204)">petsc</span>-dev/externalpackages/MUMPS_4.10.0-p3/src/dmumps_part1.F:409</div>
<div style>/project/k121/sandbox/<span class="il" style="background-image:initial;background-color:rgb(255,255,204)">petsc</span>-dev/externalpackages/MUMPS_4.10.0-p3/src/dmumps_part3.F:6651</div><div style>/project/k121/sandbox/<span class="il" style="background-image:initial;background-color:rgb(255,255,204)">petsc</span>-dev/externalpackages/MUMPS_4.10.0-p3/src/mumps_c.c:422</div>
<div style><br></div><div style>I don't know the MUMPS source code very well so I couldn't tell you what this set of routines are doing, but this is a snippet of the stack trace I was seeing when the jobs died on BG/P.</div>
<div style><br></div><div style>If you set the "-info" flag on a PETSc run, it sends a lot of debugging output to the screen, which is useful when you're in a situation where it is hard to get access to a debugger or the stack trace.</div>
<div style><br></div><div style>A</div><div style><br></div><div class="gmail_quote">On Tue, Apr 24, 2012 at 10:22 PM, Alexander Grayver <span dir="ltr"><<a href="mailto:agrayver@gfz-potsdam.de" target="_blank">agrayver@gfz-potsdam.de</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Aron,<br><br>This parameter let's to see mumps output in console. The important this to understand where mumps hangs, during analysis, factorization or actual solution (substitutions)? I'm almost sure it's factorization step. I observe this pretty often with mumps compiled with petsc (whereas when mumps is used directly it's quite rare to come along with this problem).<br>
<br>Regards,<br>Alexander <br><br><div><div class="im">----- Reply message -----<br>From: "Aron Ahmadia" <<a href="mailto:aron.ahmadia@kaust.edu.sa" target="_blank">aron.ahmadia@kaust.edu.sa</a>><br>To: "PETSc users list" <<a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a>><br>
Subject: [petsc-users] mumps get stuck with parmetis<br></div><div><div class="h5">Date: Tue, Apr 24, 2012 21:13<br><br></div></div></div><div class="HOEnZb"><div class="h5"><br><div dir="ltr"><div class="gmail_extra">I'm not sure if this is related, but Parmetis+Mumps+PETSc 3.2 on BlueGene/P was causing similar behavior without even setting any options. The only way I was able to get a direct solver going was by switching over to SuperLU.</div>
<div class="gmail_extra"><br></div><div class="gmail_extra">A<br><br><div class="gmail_quote">On Tue, Apr 24, 2012 at 10:01 PM, Alexander Grayver <span dir="ltr"><<a href="mailto:agrayver@gfz-potsdam.de" target="_blank">agrayver@gfz-potsdam.de</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Can you set:<br><br>-mat_mumps_icntl_4 1<br><br>And send mumps output?<br>Also do you use lu or ilu? How large is your matrix?<br>
<br>Regards,<br>Alexander<div><div><br><br><div>----- Reply message -----<br>From: "Wen Jiang" <<a href="mailto:jiangwen84@gmail.com" target="_blank">jiangwen84@gmail.com</a>><br>
To: <<a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a>><br>Subject: [petsc-users] mumps get stuck with parmetis<br>Date: Tue, Apr 24, 2012 19:43<br><br></div><br>Hi,<br><br>My code will hang at the solving stage when I use mumps with the runtime option -mat_mumps_icntl_28 2 -mat_mumps_icntl_29 2. If I remove these two options, my code works fine. I am using PETSc 3.2 and configure it with <span style="color:rgb(255,0,0)"><span style="color:rgb(0,0,0)">--download-mumps=1 and --download-parmetis=1. Could anyone give me any hints? Thanks.<br>
<br>Regards,<br>Wen </span><br></span>
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