Hello everyone, I have a question on snes with line search. Under what circumstance, applying the (globalized) line search can perform WORSE than without line search (i.e. full newton step ls type basic)?
When I apply snes with my problem, I found that at some time steps, snes diverges with linesearch_bt, but can converge with linesearch_basic (using same initial guess). For the same problem, there are also some steps, at which linearsearch_basic fails, but linesearch_bt converges. Is there a general guide line to decide whether linesearch should be used? Thanks. Xiangdong
