Re: [petsc-users] Using higher order ILU preconditioner

> On Sep 28, 2017, at 2:27 PM, Rachit Prasad wrote: > > I guess I missed out an important piece of information, due to legacy code > issues, I am working with Petsc version 2.3.2. Unfortunately, it doesn't have > PCFactorSetMatOrderingType(). Thanks for the advice though. I

Re: [petsc-users] Using higher order ILU preconditioner

I guess I missed out an important piece of information, due to legacy code issues, I am working with Petsc version 2.3.2. Unfortunately, it doesn't have PCFactorSetMatOrderingType(). Thanks for the advice though. I still don't understand, why would it ask for so much memory, it is almost 16

Re: [petsc-users] Using higher order ILU preconditioner

Calling PCFactorSetMatOrderingType() (or command line option: -pc_factor_mat_ordering_type) to use RCM or 1WD usually helps me a lot. My application is based on highly-unstructured meshes. Fande, On Thu, Sep 28, 2017 at 2:53 PM, Rachit Prasad wrote: > Hi, > > I am trying to

[petsc-users] Using higher order ILU preconditioner

Hi, I am trying to solve a highly ill-conditioned matrix and am unable to get convergence when using ILU(0) or Jacobi and SOR preconditioners. I tried to implement a higher order ILU by increasing the level of fill-in to 1 by calling call PCFactorSetLevels(pc,1,ierr) However, when I do that I