[petsc-users] code hangs inside SUPERLU DIST

[Wen Jiang]

Sorry for the last incomplete email. Please forget about it. Let me finish
it up here.

Hello Everyone,

I am using KSPPRECONLY type ksp with SUPERLU DIST. However, I found my code
hangs inside superlu_dist solver and never finishes.

The problem I am solving is a time-dependent nonlinear pde and I use fully
Newton-Raphson for each time step. So my code will look like,

For Time STEP = From start to end

    For Newton-Raphson Iterations = From 1 to max iterations

        Calculate Matrix A; (A is different for each Newton-Raphson
iteration)

        Create KSP
        KSPSetOperator(A,A,same_nonzero_pattern)
        KSPSolve;

       KSPDestroy;

    END Newton-Raphson Iterations

End Time STEP

Could you give me any hints what the problem might be? I am using Petsc 3.1
p8 and superlu dist v2.4. And my code works fine with KSP iterative solver
like GMRES.

Regards,
Wen

On Sun, Apr 1, 2012 at 3:12 PM, Wen Jiang <jiangwen84 at gmail.com> wrote:

> Hello Everyone,
>
> I am using KSPPRECONLY type ksp with SUPERLU DIST. However, I found my
> code hangs inside superlu_dist solver and never finishes.
>
> The problem I am solving is a time-dependent nonlinear pde and I use fully
> Newton-Raphson for each time step. So my code will look like,
>
> For Time STEP = start to end
>
>     For Newton-Raphson Iterations = 1 to max iterations
>
>         Calculate Matrix A;
>
>
>
>     END Newton-Raphson Iterations
>
> End Time STEP
>
>
> Could you give me any hints what the problem might be? I am using Petsc
> 3.1 p8 and superlu dist v2.4.
>
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