[petsc-users] Software for load balancing to improve parallel performance to be used with PETSc

[Dmitry Karpeev]

On Wed, Jan 4, 2012 at 2:28 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:

>
> On Jan 4, 2012, at 1:18 PM, TAY wee-beng wrote:
>
> > Hi Barry and Jed,
> >
> > So the 1st step should be checking the load balancing. If it's more or
> less balanced, will slicing it in 3 directions further improve the speed?
> >
> > Another thing is that I hope to do some form of adaptive mesh refinement.
> >
> > I'm a bit confused. Are partitioning software like ParMETIS, Zoltan or
> Isorropia also used for adaptive mesh refinement?
> >
> > Or which open source software can do that with PETSc and in Fortran? I
> searched and got libMesh, for use with PETSc and paramesh, which is in
> Fortran.
>
>    Go with libmesh, it has an active community and mailing list for issues
> that come up.
>

And will soon have its own DM :-)

>
>   Barry
>
> >
> > Yours sincerely,
> >
> > TAY wee-beng
> >
> >
> > On 4/1/2012 1:11 AM, Barry Smith wrote:
> >> On Jan 3, 2012, at 6:03 PM, Jed Brown wrote:
> >>
> >>> On Tue, Jan 3, 2012 at 17:57, Barry Smith<bsmith at mcs.anl.gov>  wrote:
> >>> Huh? Since it is a structured cartesian mesh code you just want to
> split up the z direction so that each process has an equal number of grid
> points
> >>>
> >>> I may have misunderstood this: "Uneven grids are used to reduce the
> number of grids and the main bulk of grids clusters around the center."
> >>    I interpreted this to mean that it is using a graded mesh in certain
> (or all) coordinate directions. I could be wrong.
> >>
> >>    Barry
> >>
> >>> If the grid is structured, then I agree to just use a good structured
> decomposition.
>
>
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