[Trilinos-Users] Question about Belos and ifpack2

[Heroux, Mike]

Chen,

Please give details about your current parameter settings and the solver behavior you are seeing (number of iterations, etc).  This information is necessary in order to give further advice.

Thanks.

Mike

> On Sep 8, 2014, at 1:42 AM, "ChenYurui" <tin at mma.cs.tsukuba.ac.jp> wrote:
> 
> Dear All,
> 
> Hello Everyone.
> I'm trying to implement an eigenvalue problem solver by using Trilinos.
> As one step of the solver, I have to solve a lot of linear system
> equations with multiple right vectors at one time.
> 
> Because the linear system equations have to be solved are complex,
> unsymmetric and coming with multiple right vectors, it seems that only
> GMRES in belos can deal with it. So I use belos and ifpack2 and tpetra.
> 
> But it is too slow. I do know very little about gmres and
> preconditioner, so I use default setting.
> Is there any another method or choice I can use to solve my questions?
> 
> Thank you very much!
> 
> Chen Yurui
> 
> Chen Yurui
> Systems and Information Engineering
> Graduate Schools
> University of Tsukuba
> 
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