[petsc-users] Convergence_Eigenvalues_k=3
Oo
wumeng07maths at qq.com
Thu Apr 24 17:24:46 CDT 2014
Configure PETSC again?
------------------ Original ------------------
From: "Dave May";<dave.mayhem23 at gmail.com>;
Send time: Friday, Apr 25, 2014 6:20 AM
To: "Oo "<wumeng07maths at qq.com>;
Cc: "Barry Smith"<bsmith at mcs.anl.gov>; "Matthew Knepley"<knepley at gmail.com>; "petsc-users"<petsc-users at mcs.anl.gov>;
Subject: Re: [petsc-users] Convergence_Eigenvalues_k=3
On the command line
On 25 April 2014 00:11, Oo <wumeng07maths at qq.com> wrote:
Where should I put "-ksp_monitor_true_residual -ksp_monitor_singular_value " ?
Thanks,
Meng
------------------ Original ------------------
From: "Barry Smith";<bsmith at mcs.anl.gov>;
Date: Apr 25, 2014
To: "Matthew Knepley"<knepley at gmail.com>;
Cc: "Oo "<wumeng07maths at qq.com>; "petsc-users"<petsc-users at mcs.anl.gov>;
Subject: Re: [petsc-users] Convergence_Eigenvalues_k=3
There are also a great deal of “bogus” numbers that have no meaning and many zeros. Most of these are not the eigenvalues of anything.
Run the two cases with -ksp_monitor_true_residual -ksp_monitor_singular_value and send the output
Barry
On Apr 24, 2014, at 4:53 PM, Matthew Knepley <knepley at gmail.com> wrote:
> On Thu, Apr 24, 2014 at 12:57 PM, Oo <wumeng07maths at qq.com> wrote:
>
> Hi,
>
> For analysis the convergence of linear solver,
> I meet a problem.
>
> One is the list of Eigenvalues whose linear system which has a convergence solution.
> The other is the list of Eigenvalues whose linear system whose solution does not converge (convergenceReason=-3).
>
> These are just lists of numbers. It does not tell us anything about the computation. What is the problem you are having?
>
> Matt
>
> Do you know what kind of method can be used to obtain a convergence solution for our non-convergence case?
>
> Thanks,
>
> Meng
>
>
>
> --
> What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.
> -- Norbert Wiener
.
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