[petsc-users] Runtime for ILU(k) vs. LU

[Barry Smith]

  If ILU(0, 1, or 2) doesn't work well then ILU( n > 2) generally doesn't work well.


> On Jan 21, 2016, at 6:52 PM, Bhalla, Amneet Pal S <amneetb at live.unc.edu> wrote:
> 
> 
> Hi Folks,
> 
> Is there a general rule for runtime of ILU(k) vs. LU for some higher level k? In other words, after what value of 'k' one 
> would be better off using LU in the preconditioner than ILU(k).
> 
> Thanks,
> --Amneet