[petsc-users] GPU implementation of serial smoothers

[Jed Brown]

Is DILU a point-block method? We have -pc_type pbjacobi (and vpbjacobi if the node size is not uniform). The are good choices for scale-resolving CFD on GPUs.

Mark Lohry <mlohry at gmail.com> writes:

> I'm running GAMG with CUDA, and I'm wondering how the nominally serial
> smoother algorithms are implemented on GPU? Specifically SOR/GS and ILU(0)
> -- in e.g. AMGx these are applied by first creating a coloring, and the
> smoother passes are done color by color. Is this how it's done in petsc AMG?
>
> Tangential, AMGx and OpenFOAM offer something called "DILU", diagonal ILU.
> Is there an equivalent in petsc?
>
> Thanks,
> Mark