Petsc and Slepc with multiple process groups

[Yujie]

You are right :). I am thinking the whole framwork for my codes. thank you,
Lisandro. In Step 3, there are different M slepc-based process groups, which
should mean M communication domain for Petsc and Slepc (I have created a
communication domain for them) is it ok? thanks again.

Regards,

Yujie

On Wed, Sep 17, 2008 at 4:08 PM, Lisandro Dalcin <dalcinl at gmail.com> wrote:

> I bet you have not even tried to actually implent and run this :-).
>
> This should work.  If not, I would consider that a bug. Let us know of
> any problem you have.
>
>
> On Wed, Sep 17, 2008 at 7:59 PM, Yujie <recrusader at gmail.com> wrote:
> > Hi, Petsc Developer:
> >
> > Currently, I am using Slepc for my application. It is based on Petsc.
> >
> > Assuming I have a cluster with N nodes.
> >
> > My codes are like
> >
> > main()
> >
> > {
> >
> > step 1: Initialize Petsc and Slepc;
> >
> > step 2: Use Petsc; (use all N nodes in one process group)
> >
> > step 3: Use Slepc; (N nodes is divided into M process groups. these
> groups
> > are indepedent. However, they need to communicate with each other)
> >
> > step 4: Use Petsc; (use all N nodes in one process group)
> >
> > }
> >
> > My method is:
> >
> > when using Slepc, MPI_Comm_split() is used to divide N nodes into M
> process
> > groups which means to generate M communication domains. Then,
> > MPI_Intercomm_create() creates inter-group communication domain to
> process
> > the communication between different M process groups.
> >
> > I don't know whether this method is ok regarding Petsc and Slepc. Because
> > Slepc is developed based on Petsc. In Step 1, Petsc and Slepc is
> initialized
> > with all N nodes in a communication domain. Petsc in Step 2 uses this
> > communication domain. However, in Step 3, I need to divide all N nodes
> and
> > generate M communication domains. I don't know how Petsc and Slepc can
> > process this change? If the method doesn't work, could you give me some
> > advice? thanks a lot.
> >
> > Regards,
> >
> > Yujie
>
>
>
> --
> Lisandro Dalcín
> ---------------
> Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
> Instituto de Desarrollo Tecnológico para la Industria Química (INTEC)
> Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
> PTLC - Güemes 3450, (3000) Santa Fe, Argentina
> Tel/Fax: +54-(0)342-451.1594
>
>
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