[petsc-users] The parallel preconditioner

[paul zhang]

I agree with you. The performance indeed depends on the type of problem.
Anyway, back to the questions I proposed, I am afraid ILU and LU are
not sequential only. Am I right?

Thanks,
Paul

Huaibao (Paul) Zhang
*Gas Surface Interactions Lab*
Department of Mechanical Engineering
University of Kentucky,
Lexington,
KY, 40506-0503
*Office*: 216 Ralph G. Anderson Building
*Web*:gsil.engineering.uky.edu

On Fri, Apr 17, 2015 at 3:22 AM, Patrick Sanan <patrick.sanan at gmail.com>
wrote:

> You can find the current list of preconditioners on line 40 here:
>
> http://www.mcs.anl.gov/petsc/petsc-current/include/petscpc.h.html
>
> You can click on the names to be taken to man pages.
>
> However, since preconditioners are by nature problem-dependent, it's a
> better idea to try to look up what might be an appropriate preconditioner
> for your system and then see how to use PETSc to apply it. There's a high
> probability that what you need is supported either natively by PETSc or as
> Jed's note demonstrates, through interfaces to external libraries (of which
> there are a large number - run ./configure -help to get an idea of the
> options available and the configure flags to use them)
>
>
> Il giorno 16/apr/2015, alle ore 23:54, huaibao zhang <
> huaibao.zhang at gmail.com> ha scritto:
>
> Hello there,
>
> I have been confused of the extent of the available preconditioners in
> PETSc for a while. Here are the lists I got from one slide of a lecture
> notes saying
>
> Block Jacobi,
> Jacobi,
> Overlapping Additive Schwarz,
> ICC, ILU (sequential only)
> ILU(K), LU(direct solver, sequential only)
> sor
> etc.
>
>
> But in some other sources, only LU is highlighted with "sequential only".
> Which one is correct? I am using MATCreateAIJ to construct my A. Which
> preconditioner is available to me? By the way, I  tested asm, ilu, icc, and
> they all failed.
>
> Thanks,
> Paul
>
>
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