Ok, so if I’m doing the default Newton Line Search, how would I interpret the 5 and the 20, vis a vis what I would be doing with pencil and paper?
-gideon > On Oct 24, 2016, at 3:59 PM, Jed Brown <[email protected]> wrote: > > Gideon Simpson <[email protected]> writes: > >> I notice that if I use -snes_view, >> >> I see lines like: >> total number of linear solver iterations=20 >> total number of function evaluations=5 >> Just to clarify, the number of "function evaluations" corresponds to the >> number of Newton (or Newton like) steps, and the total "number of linear >> solver iterations” is the total number of iterations needed to solve the >> linear problem at each Newton iteration. Is that correct? So in the above, >> there are 5 steps of Newton and a total of 20 iterations of the linear >> solver across all 5 Newton steps. > > Usually there is one final residual evaluation to declare convergence. > > Also, if you activated a line search, the residual would have been > evaluated more than once per Newton step.
