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

Barry Smith bsmith at mcs.anl.gov
Thu Jan 21 19:03:39 CST 2016

  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

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