[petsc-users] DIVERGED_NANORINF when using HYPRE/BoomerAMG

[Andrea Iob]

Sorry, I've clicked the send button by mistake.

The setup I'm using comes from the following guide:

https://mooseframework.inl.gov/application_development/hypre.html

Since I'm new to BoomerAMG I've been using that guide as a reference, but I'm not sure if those setting are appropriate from my system.

Best regards,
Andrea


________________________________
From: Andrea Iob <andrea_iob at hotmail.com>
Sent: Thursday, July 9, 2020 2:55 PM
To: Mark Adams <mfadams at lbl.gov>
Cc: Barry Smith <bsmith at petsc.dev>; Matthew Knepley <knepley at gmail.com>; petsc-users at mcs.anl.gov <petsc-users at mcs.anl.gov>
Subject: Re: [petsc-users] DIVERGED_NANORINF when using HYPRE/BoomerAMG

Yes, I'm using AIJ matrices.

These are the options I'm using to set up BoomerAMG:

        PCHYPRESetType(preconditioner, "boomeramg");
        PetscOptionsSetValue(nullptr, "-pc_hypre_boomeramg_smooth_type", "Pilut");
        PetscOptionsSetValue(nullptr, "-pc_hypre_boomeramg_relax_type_all", "sequential-Gauss-Seidel");
        PetscOptionsSetValue(nullptr, "-pc_hypre_boomeramg_strong_threshold", "0.7");
        PetscOptionsSetValue(nullptr, "-pc_hypre_boomeramg_coarsen_type", "HMIS");
        PetscOptionsSetValue(nullptr, "-pc_hypre_boomeramg_interp_type", "classical");
        PetscOptionsSetValue(nullptr, "-pc_hypre_boomeramg_interp_type", "ext+i");
        PetscOptionsSetValue(nullptr, "-pc_hypre_boomeramg_P_max", "2");
        PetscOptionsSetValue(nullptr, "-pc_hypre_boomeramg_truncfactor", "0.3");
        PetscOptionsSetValue(nullptr, "-pc_hypre_boomeramg_agg_nl", "4");
        PetscOptionsSetValue(nullptr, "-pc_hypre_boomeramg_agg_num_paths", "5");
        PetscOptionsSetValue(nullptr, "-ksp_error_if_not_converged", "");

This setup come from the following

https://mooseframework.inl.gov/application_development/hypre.html

________________________________
From: Mark Adams <mfadams at lbl.gov>
Sent: Friday, July 3, 2020 2:58 PM
To: Andrea Iob <andrea_iob at hotmail.com>
Cc: Barry Smith <bsmith at petsc.dev>; Matthew Knepley <knepley at gmail.com>; petsc-users at mcs.anl.gov <petsc-users at mcs.anl.gov>
Subject: Re: [petsc-users] DIVERGED_NANORINF when using HYPRE/BoomerAMG



3) Schwarz-smoothers

#0  0x00007ffff50897f4 in dtrsm_ () from /opt/lapack/3.8.0-gcc.7.4.0/lib64/libblas.so.3
#1  0x00007ffff550924b in dpotrs_ () from /opt/lapack/3.8.0-gcc.7.4.0/lib64/liblapack.so.3

This seems to be Cholesky ... which would not work for you if you are not symmetric (Navier-Stokes).

If GAMG works then and pilut going crazy but quite there yet, I would think there is a hypre interface problem of some sort.

Hypre has been used a lot so this is a surprise. Do you use AIJ matrices? Not BAIJ or anything else.

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