[petsc-users] snes linesearch bt vs basic?

[Jed Brown]

Xiangdong <epscodes at gmail.com> writes:

> It seems that TSAdaptChoose_Basic only uses the local truncation error to
> predict the next time step. Do you also include the number of snes
> iterations in computing the next time step in some adapt option?

TSAdaptChoose_Basic doesn't use the number of iterations (you can set
your own callback for whatever policy you want), but TSAdaptCheckStage
handles SNES failures and you can set a max number of SNES iterations.
(This could be less efficient than a progressive function that gradually
reduces time step as the number of iterations increases.)
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