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" <[email protected]> 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" <[email protected]> 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/20120424/2db311da/attachment.htm>
