SNESSetMaxLinearSolveFailures() or -snes_max_linear_solve_fail 1000 (use some large number here).
> On Apr 10, 2017, at 1:22 PM, Ping He <[email protected]> wrote: > > Dear all, > > I am using SNES for an incompressible flow problem. I choose the > preconditioned matrix-free Newton approach with the Eisenstat-Walker option, > and the KSP solver is GMRES. > > Now I have a question on how do I setup the convergence criteria for KSP. I > notice that if the ksp iteration reaches the maxIter_ksp (I set it to 300), > SNES will treat it as divergence and quit. However, this is usually not the > case and the SNES norm can definitely drop more. So I am wondering if there > is a way to tell SNES that if KSP reaches maxIter_ksp, continue doing line > search and don't quit. I know that I can play with the maxIter_ksp and EW > parameters to mitigate this issue, but I don't want KSP to over-solve for > each SNES iteration. > > Anyway, I want a setup that SNES will quit based on rTol_snes and > maxIter_snes, instead of maxIter_ksp. Any suggestions? Thanks very much in > advance! > > Best regards, > > Jack >
