[petsc-users] Parameter to pick KSP for estimating eigenvalues for Chebyshev

[Barry Smith]

   Hmm. How can I reproduce this? I tested my fix with both -pc_type mg and -pc_type gamg and it changed in both cases -mg_levels_esteig_ksp_type cg

  Barry

> On Jun 17, 2015, at 12:59 PM, Garth N. Wells <gnw20 at cam.ac.uk> wrote:
> 
> On 17 June 2015 at 15:43, Barry Smith <bsmith at mcs.anl.gov> wrote:
>> 
>>   I introduced a bug in my cleanup. The kspest eigenestimator was created AFTER the KSPSetFromOptions_Chebyshev() hence the options for controlling the KSP estimator were never processed.
>> 
>>   I've attached a patch, please let me know how it goes.
>> 
> 
> I've applied the patch, but I still can't change the Krylov method for
> estimating the eigenvalues.
> 
> Garth
> 
>>  Barry
>> 
>> 
>>> On Jun 17, 2015, at 6:24 AM, Garth N. Wells <gnw20 at cam.ac.uk> wrote:
>>> 
>>> It used to be possible to pick the Krylov solver used to estimate the
>>> eigenvalues for Chebyshev, via the parameter system
>>> ("mg_levels_est_ksp_type" and "gamg_est_ksp_type"). I know there was
>>> some clean-up, with the parameters becoming
>>> "mg_levels_ksp_chebyshev_esteig_foo", but an option to pick the Krylov
>>> solver appears to be missing. Or have I overlooked it?
>>> 
>>> Garth
>> 
>>