[petsc-users] tfqmr true residual norm monitoring

[Jed Brown]

On Sat, Jul 16, 2011 at 16:06, Barry Smith <bsmith at mcs.anl.gov> wrote:

> Note that our GMRES is implemented only with left preconditioning and
> preconditioned residual norm but you can use the FGMRES which is implemented
> only for right preconditioning and the true residual norm for testing.


Right preconditioning also works with normal GMRES, run with -ksp_norm_type
unpreconditioned -ksp_pc_side right (in petsc-dev, -ksp_right_pc in
petsc-3.1).
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