[petsc-users] default preconditioner

Jed Brown jed at 59A2.org
Tue Feb 23 04:20:46 CST 2010

On Tue, 23 Feb 2010 10:04:46 -0000, "Christian Klettner" <christian.klettner at ucl.ac.uk> wrote:
> Dear PETSc,
> What is the default preconditioner (if i do not explicitly set one)?

Short answer: Run with -ksp_view.

Long answer: ILU(0) in serial and block Jacobi with ILU(0) on subdomains
in parallel, unless using DMMG in which case it is full multigrid with
the above on each level (wrapped in a single GMRES iteration) and a
redundant coarse level solve.


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