[petsc-users] Verifying ParMetis used

[Mark Adams]

Thanks Hong,
I call ParMetis from the app code and not from within a solver.  Perhaps
-info should say "called ParMetis, edgecuts = %d\n", or something like that.
Mark

On Mon, Nov 17, 2014 at 10:46 AM, Hong <hzhang at mcs.anl.gov> wrote:

> Mark,
> I use ParMetis with mumps direct solver. I can test their installation
> with
> petsc/src/ksp/ksp/examples/tutorials
> mpiexec -n 2 ./ex2 -pc_type lu -pc_factor_mat_solver_package mumps
> -mat_mumps_icntl_28 2 -mat_mumps_icntl_29 2 -ksp_view
> ...
>  ICNTL(28) (use parallel or sequential ordering):        2
>  ICNTL(29) (parallel ordering):                          2
>
> To know what these parameters are, do
> mpiexec -n 2 ./ex2 -pc_type lu -pc_factor_mat_solver_package mumps -help
> |grep mumps
> ...
>   -mat_mumps_icntl_28 <1>: ICNTL(28): use 1 for sequential analysis and
> ictnl(7) ordering, or 2 for parallel analysis and ictnl(29) ordering (None)
>   -mat_mumps_icntl_29 <0>: ICNTL(29): parallel ordering 1 = ptscotch 2 =
> parmetis (None)
>
> Hong
>
> On Mon, Nov 17, 2014 at 9:12 AM, Mark Adams <mfadams at lbl.gov> wrote:
>
>> I have a code that repartitions the grid using PETSc.  I would like to
>> know the simplest instructions that I can give my users (Pat Worley in this
>> case) to verify that ParMetis is actually called.  I had difficulty with
>> this my self in that -info did not seem to say ParMetis was being used.  I
>> did verify by printing vizing the partitions that partitioning was taking
>> place.  I am thinking I can say use -log_summary and search for
>> download-parmetis -- is there a better way?
>>
>> Mark
>>
>
>
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