[petsc-users] Verifying ParMetis used

[Hong]

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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