[petsc-users] mumps get stuck with parmetis

[Alexander Grayver]

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
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