Matthew Knepley <knep...@gmail.com> writes: > On Wed, Jun 10, 2020 at 9:02 AM Mark Lohry <mlo...@gmail.com> wrote: > >> Hi all, is there a built-in way to use L-infinity norms for the SNES and >> KSP convergence tests, or do I need to write a manual KSPSetConvergenceTest >> function? >> > > You need to write a custom test.
Note that it may incur a large cost with some methods. In GMRES, for example, the solution and residual are not explicitly available on each iteration. They are in GCR, at the cost of storing two vectors per Krylov iteration instead of one for GMRES.
