Sorry forgot to hit reply all On Monday, October 24, 2016, Justin Chang <[email protected]> wrote:
> It depends on your SNES solver. A SNES iteration could involve more than > one function evaluation (e.g., line searching). Also, -snes_monitor may say > 3 iterations whereas -snes_view might indicate 4 function evaluations which > could suggest that the first call was for computing the initial residual. > > On Mon, Oct 24, 2016 at 2:22 PM, Gideon Simpson <[email protected] > <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: > >> 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. >> >> -gideon >> >> >
