Hi Matt, You mentioned it doesn’t hurt to set the smoothing flags
https://urldefense.us/v3/__https://github.com/hypre-space/hypre/blob/3caa81955eb8d1b4e35d9b450e27cf6d07b50f6e/src/examples/ex15.c*L965__;Iw!!G_uCfscf7eWS!ab7xBNMnurfBQihWzSOZdJKuuhPObxZolYSuACYpW4-NN7L84moQXv7vO962vvaVT3soXUhcCaNH6_B2mLY_MzICr-c63C4mpYGo$ <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$> Do you know where I can look for the equivalent PETSc commands? Thank you. Kind regards, Karthik. From: Matthew Knepley <knep...@gmail.com> Date: Friday, 6 September 2024 at 17:57 To: Chockalingam, Karthikeyan (STFC,DL,HC) <karthikeyan.chockalin...@stfc.ac.uk> Cc: petsc-users@mcs.anl.gov <petsc-users@mcs.anl.gov> Subject: Re: [petsc-users] Hypre AMS usage On Fri, Sep 6, 2024 at 11:37 AM Karthikeyan Chockalingam - STFC UKRI via petsc-users <petsc-users@mcs.anl.gov<mailto:petsc-users@mcs.anl.gov>> wrote: Hello, I am trying to use the Hypre AMS preconditioner for the first time. I am following the example problem from Hypre https://urldefense.us/v3/__https://github.com/hypre-space/hypre/blob/3caa81955eb8d1b4e35d9b450e27cf6d07b50f6e/src/examples/ex15.c*L954__;Iw!!G_uCfscf7eWS!ab7xBNMnurfBQihWzSOZdJKuuhPObxZolYSuACYpW4-NN7L84moQXv7vO962vvaVT3soXUhcCaNH6_B2mLY_MzICr-c63EQeUx5h$ <https://urldefense.us/v3/__https:/github.com/hypre-space/hypre/blob/3caa81955eb8d1b4e35d9b450e27cf6d07b50f6e/src/examples/ex15.c*L954__;Iw!!G_uCfscf7eWS!biuCOXkV-qD-e8iTXiwaD9XJ0EWuqr2PidZJdPqbnFzCshQFo-mclGSvGBOPuGSTkjPvMKnIfJzWos7QShcSitpwyrhL5ySgA0XM$> I have so far successfully set the discrete gradient operator and vertex co-ordinates, // Set discrete gradient petscErr = PCHYPRESetDiscreteGradient(pc, par_G); // Set vertex coordinates petscErr = PCHYPRESetEdgeConstantVectors(pc, par_xvec, par_yvec, par_zvec); Do I need to set the following smoothing options? https://urldefense.us/v3/__https://github.com/hypre-space/hypre/blob/3caa81955eb8d1b4e35d9b450e27cf6d07b50f6e/src/examples/ex15.c*L965__;Iw!!G_uCfscf7eWS!ab7xBNMnurfBQihWzSOZdJKuuhPObxZolYSuACYpW4-NN7L84moQXv7vO962vvaVT3soXUhcCaNH6_B2mLY_MzICr-c63C4mpYGo$ <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$> It cannot hurt. I would set them to begin with. Also, do I need to convert from MATMPIAIJ to CSR? https://urldefense.us/v3/__https://github.com/hypre-space/hypre/blob/3caa81955eb8d1b4e35d9b450e27cf6d07b50f6e/src/examples/ex15.c*L984__;Iw!!G_uCfscf7eWS!ab7xBNMnurfBQihWzSOZdJKuuhPObxZolYSuACYpW4-NN7L84moQXv7vO962vvaVT3soXUhcCaNH6_B2mLY_MzICr-c63J_yBxgt$ <https://urldefense.us/v3/__https:/github.com/hypre-space/hypre/blob/3caa81955eb8d1b4e35d9b450e27cf6d07b50f6e/src/examples/ex15.c*L984__;Iw!!G_uCfscf7eWS!biuCOXkV-qD-e8iTXiwaD9XJ0EWuqr2PidZJdPqbnFzCshQFo-mclGSvGBOPuGSTkjPvMKnIfJzWos7QShcSitpwyrhL53Trv1si$> No. What are the other PETSc calls to invoke AMS? Is there an example problem I can look at? I do not know. I don't think we have an example. Thanks, Matt Thank you. Karthik. -- Karthik Chockalingam, Ph.D. Senior Research Software Engineer High Performance Systems Engineering Group Hartree Centre | Science and Technology Facilities Council karthikeyan.chockalin...@stfc.ac.uk<mailto:karthikeyan.chockalin...@stfc.ac.uk> [signature_3970890138] -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener https://urldefense.us/v3/__https://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!ab7xBNMnurfBQihWzSOZdJKuuhPObxZolYSuACYpW4-NN7L84moQXv7vO962vvaVT3soXUhcCaNH6_B2mLY_MzICr-c63F-LoyUA$ <https://urldefense.us/v3/__http://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!ab7xBNMnurfBQihWzSOZdJKuuhPObxZolYSuACYpW4-NN7L84moQXv7vO962vvaVT3soXUhcCaNH6_B2mLY_MzICr-c63NJaW4eQ$ >
