Parallel use of Prometheus

[Nicolas Tardieu]

I also did this on my software and it shows terrific performance in serial.
My problem may come from the default distribution of the matrix in PETSc : N
rows on proc 0, N rows on proc 1, ....

How did you distribute the matrix in your program?

Nicolas

2008/1/16, Sanjay Govindjee <sanjay at ce.berkeley.edu>:
>
> I have not tried this with any of the examples in the distribution  only
> with my own program.
>
> The steps are relatively straightforward but you must know them already
> since you have it
> working in serial.  Nonetheless here is the order of call I have:
>
> call MatCreateMPIBAIJ(...                 ! must be blocked
> call MatAssemblyBegin (...                ! Assemble the matrix
> call MatAssemblyEnd   (...
>
> call VecAssemblyBegin (...                !Assemble the RHS
> call VecAssemblyEnd   (...
>
> call KSPCreate        (...
> call KSPSetOperators  (...
> call KSPGetPC             (...
> call PCSetCoordinates(...                      ! I'm not fully certain
> but your problem may have to be defined over R^3 for this to work well
> call KSPSetFromOptions(...
>
> call KSPSolve         (...
>
>
> Nicolas Tardieu wrote:
> > Hi Sanjay,
> >
> > Have you used it on simple examples of the PETSc distribution?
> >
> > Nicolas
> >
> > 2008/1/16, Sanjay Govindjee <sanjay at ce.berkeley.edu
> > <mailto:sanjay at ce.berkeley.edu>>:
> >
> >     We have used it extensively with good success in the past.
> >     -sanjay
> >
> >     Nicolas Tardieu wrote:
> >     > Hi everyone,
> >     >
> >     > I have been using Prometheus for scalar and vector problems with
> >     great
> >     > success on sequential computers.
> >     > But when trying to use it in parallel, Prometheus crashes.
> >     > Then I tried it on some PETSc tests
> >     (src/ksp/ksp/examples/tests/ex3.c
> >     > for instance) on parallel and they also crash...
> >     > Does anyone have experienced Prometheus in parallel?
> >     >
> >     > Thanks,
> >     >
> >     > Nicolas
> >     >
> >
> >
>
>
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