[petsc-users] Verifying ParMetis used

[Jose E. Roman]

Are you using it via MatPartitioning? Then use -mat_partitioning_view 

Jose


El 17/11/2014, a las 17:22, Hong escribió:

> 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
> 
> 
>