[petsc-users] Specify BoomerAMG aggressive coarsening interpolation type via options database

[Mcintyre, Sean Michael]

I must have copied the wrong line out of the BoomerAMG website. Oops!

I'll probably do that, then.

Thanks,
Sean
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Subject: Re: [petsc-users] Specify BoomerAMG aggressive coarsening interpolation type via options database

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On 14 Jun 2024, at 9:15 PM, Mcintyre, Sean Michael <smm5164 at psu.edu> wrote:

Pierre,

That only specifies it for AMG levels that are not coarsened aggressively. Aggressively coarsened levels end up with the default multipass long-range interpolation.

My bad, in your initial message, you mentioned the HYPRE_BoomerAMGSetInterpType() API, but I guess you meant to write HYPRE_BoomerAMGSetAggInterpType()?
This is indeed not interfaced right now, but you could copy what’s currently done for -pc_hypre_boomeramg_interp_type and submit an MR.

Thanks,
Pierre

Thanks,
Sean
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Subject: Re: [petsc-users] Specify BoomerAMG aggressive coarsening interpolation type via options database

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On 14 Jun 2024, at 8:42 PM, Mcintyre, Sean Michael <smm5164 at psu.edu<mailto:smm5164 at psu.edu>> wrote:

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Hi there,

I'd like to try a different long-range interpolation scheme with BoomerAMG's aggressive coarsening (defaults to multipass). Is there a way to specify this via the PETSc options database? I see in the BoomerAMG documentation that the appropriate function call would be HYPRE_BoomerAMGSetInterpType. I'd prefer to do it via the options database than put it directly into my code. Adding the -help option, I don't see anything like pc_hypre_boomeramg_agg_interp_type. Could this perhaps be added if there isn't currently a way to do it?

It’s there already.
$ ./ex1 -pc_type hypre -help|grep multipass
  -pc_hypre_boomeramg_interp_type: <now classical : formerly classical> Interpolation type (choose one of) classical   direct multipass multipass-wts ext+i ext+i-cc standard standard-wts block block-wtd FF FF1 ext ad-wts ext-mm ext+i-mm ext+e-mm (None)

Thanks,
Pierre

Thanks,
Sean McIntyre

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