On Fri, Sep 6, 2024 at 11:37 AM Karthikeyan Chockalingam - STFC UKRI via petsc-users <petsc-users@mcs.anl.gov> wrote:
> Hello, > > > > I am trying to use the Hypre AMS preconditioner for the first time. > > > > I am following the example problem from Hypre > > > https://urldefense.us/v3/__https://github.com/hypre-space/hypre/blob/3caa81955eb8d1b4e35d9b450e27cf6d07b50f6e/src/examples/ex15.c*L954__;Iw!!G_uCfscf7eWS!Z1YtcjIl3JraPfN9GbBHhno-LcLOXJurvRZ3MKzzbqSMDLtq5x7_DICKdBj5idJnKPOPq7kmcpCvAzu6MVKD$ > > <https://urldefense.us/v3/__https://github.com/hypre-space/hypre/blob/3caa81955eb8d1b4e35d9b450e27cf6d07b50f6e/src/examples/ex15.c*L954__;Iw!!G_uCfscf7eWS!biuCOXkV-qD-e8iTXiwaD9XJ0EWuqr2PidZJdPqbnFzCshQFo-mclGSvGBOPuGSTkjPvMKnIfJzWos7QShcSitpwyrhL5ySgA0XM$> > > > > I have so far successfully set the discrete gradient operator and vertex > co-ordinates, > > > > // Set discrete gradient > > petscErr = PCHYPRESetDiscreteGradient(pc, par_G); > > > > // Set vertex coordinates > > petscErr = PCHYPRESetEdgeConstantVectors(pc, par_xvec, par_yvec, > par_zvec); > > > > Do I need to set the following smoothing options? > > > https://urldefense.us/v3/__https://github.com/hypre-space/hypre/blob/3caa81955eb8d1b4e35d9b450e27cf6d07b50f6e/src/examples/ex15.c*L965__;Iw!!G_uCfscf7eWS!Z1YtcjIl3JraPfN9GbBHhno-LcLOXJurvRZ3MKzzbqSMDLtq5x7_DICKdBj5idJnKPOPq7kmcpCvA-1nohaB$ > > <https://urldefense.us/v3/__https://github.com/hypre-space/hypre/blob/3caa81955eb8d1b4e35d9b450e27cf6d07b50f6e/src/examples/ex15.c*L965__;Iw!!G_uCfscf7eWS!biuCOXkV-qD-e8iTXiwaD9XJ0EWuqr2PidZJdPqbnFzCshQFo-mclGSvGBOPuGSTkjPvMKnIfJzWos7QShcSitpwyrhL55yOMB-v$> > It cannot hurt. I would set them to begin with. > Also, do I need to convert from MATMPIAIJ to CSR? > > > https://urldefense.us/v3/__https://github.com/hypre-space/hypre/blob/3caa81955eb8d1b4e35d9b450e27cf6d07b50f6e/src/examples/ex15.c*L984__;Iw!!G_uCfscf7eWS!Z1YtcjIl3JraPfN9GbBHhno-LcLOXJurvRZ3MKzzbqSMDLtq5x7_DICKdBj5idJnKPOPq7kmcpCvA8aGosCn$ > > <https://urldefense.us/v3/__https://github.com/hypre-space/hypre/blob/3caa81955eb8d1b4e35d9b450e27cf6d07b50f6e/src/examples/ex15.c*L984__;Iw!!G_uCfscf7eWS!biuCOXkV-qD-e8iTXiwaD9XJ0EWuqr2PidZJdPqbnFzCshQFo-mclGSvGBOPuGSTkjPvMKnIfJzWos7QShcSitpwyrhL53Trv1si$> > No. > What are the other PETSc calls to invoke AMS? Is there an example problem > I can look at? > I do not know. I don't think we have an example. Thanks, Matt > Thank you. > > > > Karthik. > > > > -- > > *Karthik Chockalingam, Ph.D.* > > Senior Research Software Engineer > > High Performance Systems Engineering Group > > Hartree Centre | Science and Technology Facilities Council > > karthikeyan.chockalin...@stfc.ac.uk > > > > [image: signature_3970890138] > > > -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener https://urldefense.us/v3/__https://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!Z1YtcjIl3JraPfN9GbBHhno-LcLOXJurvRZ3MKzzbqSMDLtq5x7_DICKdBj5idJnKPOPq7kmcpCvAyAOkwy1$ <https://urldefense.us/v3/__http://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!Z1YtcjIl3JraPfN9GbBHhno-LcLOXJurvRZ3MKzzbqSMDLtq5x7_DICKdBj5idJnKPOPq7kmcpCvA1RwP5cb$ >
