[petsc-users] parallel ILU

Barry Smith bsmith at mcs.anl.gov
Tue Feb 16 13:27:23 CST 2010

On Feb 16, 2010, at 9:19 AM, Jed Brown wrote:

> On Mon, 15 Feb 2010 12:45:21 -0500, Craig Tanis <craig- 
> tanis at utc.edu> wrote:
>> It is possible to do ILU-k preconditioning on an MPI matrix, right?
> Note that ILU (regardless of fill) scales very poorly, so it really  
> only
> makes sense on a small number of cores, and even then, only if you  
> can't
> find anything else that works.  As Matt says, build with Hypre, then
>   -pc_type hypre -pc_hypre_type euclid -pc_hypre_euclid_levels k
> Jed

   Also note that there is no support for BAIJ matrices. It is only a  
"scalar" ILU, not one that works on little blocks.


More information about the petsc-users mailing list