[petsc-dev] perhaps where the custom adapativity perversity began

Jed Brown jed at jedbrown.org
Sat Apr 29 22:49:01 CDT 2017

Barry Smith <bsmith at mcs.anl.gov> writes:

>     ierr = PetscOptionsBool("-ts_theta_adapt","Use time-step adaptivity with the Theta method","",th->adapt,&th->adapt,NULL);CHKERRQ(ierr);


  Added time-step adaptivity for the theta method. It's currently
  switched off by default till the error estimation is fixed.

And this is why workarounds are so much worse than fixing the root of the problem.

>    Really, even a method so simple minded I can understand it, requires its own flags for adaptivity?
>    Based on this model we'll have -ksp_cg_max_its and -ksp_gmres_max_its pretty soon and where is -ts_arkimex_max_steps, we'd better add it soon.
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