Thank's a lot, Mark ! What does 'native' mean here ? That it is PETSc's
built-in and not interface ?
Antony
On Nov 9 2012, Mark F. Adams wrote:
>> Of all algebraic multigrid implemented or interfaced in PETSc, i.e.
>> BoomerAMG (PCHypre), ML(PCML), and PCGAMG("agg"), what is the order of
>> the cost (memory) to set up the preconditioner (setting nullspace etc) ?
>
> Not a simple question. ML and GAMG use very similar algorithms and ML is
> implemented in a more "native" way than hypre (GAMG is completely
> native). GAMG/ML are probably better for elasticity, hypre is great for
> 2D low order discretizations of Laplacian, and it is a very hardened
> implementation. hypre is not native so there are some things that don't
> work as well.
>
>>
>> Regards,
>> Antony
>>
