[petsc-users] mumps freezes for bigger problems

[Jed Brown]

-pc_type lu -pc_factor_mat_solver_package superlu_dist
On Dec 21, 2011 6:19 AM, "Dominik Szczerba" <dominik at itis.ethz.ch> wrote:

> I am successfully solving my indefinite systems with MUMPS but only
> for very small problems. To give a feeling, a mere couple thousands
> elements. If I only double the problem size, it silently freezes, even
> with max verbosity via the control parameters. Did anyone succeed here
> with big problems? Any recommendations for a drop-in replacement for
> MUMPS?
>
> Thanks for any hints,
> Dominik
>
>
>
> Options used:
> -mat_mumps_icntl_4 3 -mat_mumps_icntl_28 2 -mat_mumps_icntl_29
>
> Output:
>
> ****** FACTORIZATION STEP ********
>
>
>  GLOBAL STATISTICS PRIOR NUMERICAL FACTORIZATION ...
>  NUMBER OF WORKING PROCESSES              =          16
>  OUT-OF-CORE OPTION (ICNTL(22))           =           0
>  REAL SPACE FOR FACTORS                   =  1438970073
>  INTEGER SPACE FOR FACTORS                =    11376442
>  MAXIMUM FRONTAL SIZE (ESTIMATED)         =       16868
>  NUMBER OF NODES IN THE TREE              =       43676
>  Convergence error after scaling for ONE-NORM (option 7/8)   = 0.21D+01
>  Maximum effective relaxed size of S              =   231932340
>  Average effective relaxed size of S              =   182366303
>
>  REDISTRIB: TOTAL DATA LOCAL/SENT         =     1509215    22859750
>  GLOBAL TIME FOR MATRIX DISTRIBUTION       =      0.8270
>  ** Memory relaxation parameter ( ICNTL(14)  )            :        35
>  ** Rank of processor needing largest memory in facto     :         0
>  ** Space in MBYTES used by this processor for facto      :      2017
>  ** Avg. Space in MBYTES per working proc during facto    :      1618
>
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