[petsc-users] KspTrueResidualNorm

[Ataollah Mesgarnejad]

Sorry for too many replies but it worked with -Ksp_monitor !!! I reported
the same kind of problem before too.

Best,
Ata

On Tue, Feb 1, 2011 at 2:32 PM, Ataollah Mesgarnejad <amesga1 at tigers.lsu.edu
> wrote:

> Barry,
>
> I did as you said and now I receive these errors once I try to run the
> program:
>
> [3]PETSC ERROR: MatHYPRE_IJMatrixCreate() line 76 in src/dm/da/utils/mhyp.c
> [3]PETSC ERROR: PCSetUp_HYPRE() line 112 in src/ksp/pc/impls/hypre/hypre.c
> [3]PETSC ERROR: PCSetUp() line 795 in src/ksp/pc/interface/precon.c
> [3]PETSC ERROR: KSPSetUp() line 237 in src/ksp/ksp/interface/itfunc.c
> [3]PETSC ERROR: KSPSolve() line 353 in src/ksp/ksp/interface/itfunc.c
> [3]PETSC ERROR: UStep() line 511 in PFMAT-FD.cpp
> [4]PETSC ERROR: MatHYPRE_IJMatrixCreate() line 76 in src/dm/da/utils/mhyp.c
> [4]PETSC ERROR: PCSetUp_HYPRE() line 112 in src/ksp/pc/impls/hypre/hypre.c
> [4]PETSC ERROR: PCSetUp() line 795 in src/ksp/pc/interface/precon.c
> [4]PETSC ERROR: KSPSetUp() line 237 in src/ksp/ksp/interface/itfunc.c
> [3]PETSC ERROR: main() line 95 in PFMAT-main.cpp
> [4]PETSC ERROR: KSPSolve() line 353 in src/ksp/ksp/interface/itfunc.c
> [4]PETSC ERROR: UStep() line 511 in PFMAT-FD.cpp
> [4]PETSC ERROR: main() line 95 in PFMAT-main.cpp
>
> Does right preconditiong work with *HYPRE*?
> Best,
> Ata
>
>
> On Tue, Feb 1, 2011 at 2:21 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:
>
>>
>>   The simplest thing is to simply run with -ksp_monitor_true_residual and
>> see how the convergence is going in the true residual norm also.
>>
>>   You can also switch to right preconditioning with gmres and then the
>> residual used by gmres is the true residual norm.  Use
>> -ksp_preconditioner_side right -ksp_norm_type unpreconditioned
>>
>>   Barry
>>
>>
>>
>> On Feb 1, 2011, at 2:14 PM, Ataollah Mesgarnejad wrote:
>>
>> > Dear all,
>> >
>> > I'm using Ksp gmres with boomeramg preconditioning and I suspect that
>> even though it converges in preconditioned norm it doesn't converge in true
>> norm, but as I understand KSPSetNormType gmres does not support true
>> residual norm? Is that correct and If it is, is there any other way to
>> monitor the true norm? Do I need to Introduce my own convergence test?
>> >
>> > Best,
>> > A. Mesgarnejad
>>
>>
>
>
> --
> A. Mesgarnejad
> PhD Student, Research Assistant
> Mechanical Engineering Department
> Louisiana State University
> 2203 Patrick F. Taylor Hall
> Baton Rouge, La 70803
>



-- 
A. Mesgarnejad
PhD Student, Research Assistant
Mechanical Engineering Department
Louisiana State University
2203 Patrick F. Taylor Hall
Baton Rouge, La 70803
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