/project/k121/sandbox/petsc -dev/externalpackages/MUMPS_4.10.0-p3/src/mumps_part9.F:4666 /project/k121/sandbox/petsc -dev/externalpackages/MUMPS_4.10.0-p3/src/dmumps_part5.F:465 /project/k121/sandbox/petsc -dev/externalpackages/MUMPS_4.10.0-p3/src/dmumps_part1.F:409 /project/k121/sandbox/petsc -dev/externalpackages/MUMPS_4.10.0-p3/src/dmumps_part3.F:6651 /project/k121/sandbox/petsc -dev/externalpackages/MUMPS_4.10.0-p3/src/mumps_c.c:422
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. 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. A On Tue, Apr 24, 2012 at 10:22 PM, Alexander Grayver <agrayver at gfz-potsdam.de > wrote: > Aron, > > 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). > > Regards, > Alexander > > ----- Reply message ----- > From: "Aron Ahmadia" <aron.ahmadia at kaust.edu.sa> > To: "PETSc users list" <petsc-users at mcs.anl.gov> > Subject: [petsc-users] mumps get stuck with parmetis > Date: Tue, Apr 24, 2012 21:13 > > > 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. > > A > > On Tue, Apr 24, 2012 at 10:01 PM, Alexander Grayver < > agrayver at gfz-potsdam.de> wrote: > >> Can you set: >> >> -mat_mumps_icntl_4 1 >> >> And send mumps output? >> Also do you use lu or ilu? How large is your matrix? >> >> Regards, >> Alexander >> >> >> ----- Reply message ----- >> From: "Wen Jiang" <jiangwen84 at gmail.com> >> To: <petsc-users at mcs.anl.gov> >> Subject: [petsc-users] mumps get stuck with parmetis >> Date: Tue, Apr 24, 2012 19:43 >> >> >> Hi, >> >> 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 >> --download-mumps=1 >> and --download-parmetis=1. Could anyone give me any hints? Thanks. >> >> Regards, >> Wen >> > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120424/3efe54e8/attachment-0001.htm>
