implementations.convergence_controller_classes.inexactness module

class NewtonInexactness(controller, params, description, **kwargs)[source]

Bases: ConvergenceController

Gradually refine Newton tolerance based on SDC residual. Be aware that the problem needs a parameter called “newton_tol” which controls the tolerance for the Newton solver for this to work!

dependencies(controller, description, **kwargs)[source]

Load the embedded error estimator if needed.

Parameters:

  • controller (pySDC.Controller) – The controller

  • description (dict) – The description object used to instantiate the controller

Returns:

None

post_iteration_processing(controller, step, **kwargs)[source]

Change the Newton tolerance after every iteration.

Parameters:

  • controller (pySDC.Controller.controller) – The controller

  • S (pySDC.Step) – The current step

Returns:

None

set_maxiter(description, maxiter)[source]
set_tolerance(lvl, tol)[source]
setup(controller, params, description, **kwargs)[source]

Define default parameters here.

Parameters:

  • controller (pySDC.Controller) – The controller

  • params (dict) – The params passed for this specific convergence controller

  • description (dict) – The description object used to instantiate the controller

Returns:

The updated params dictionary

Return type:

(dict)