[petsc-users] Verifying ParMetis used

[Hong]

Mark :
>
> 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.
>

Info like this needs to be put in petsc/ParMetis interface.
We do not have it, do we?
I use mumps/parmetis, thus have to get parmetis info via mumps.

Hong


> 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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