SNESSetConvergenceHistory

Sets the array used to hold the convergence history.

Synopsis

#include "petscsnes.h"  
int SNESSetConvergenceHistory(SNES snes,PetscReal *a,int *its,int na,PetscTruth reset)

Collective on SNES

Input Parameters

	snes	- iterative context obtained from SNESCreate()
	a	- array to hold history
	its	- integer array holds the number of linear iterations for each solve.
	na	- size of a and its
	reset	- PETSC_TRUE indicates each new nonlinear solve resets the history counter to zero, else it continues storing new values for new nonlinear solves after the old ones

Notes

If set, this array will contain the function norms computed at each step.

This routine is useful, e.g., when running a code for purposes of accurate performance monitoring, when no I/O should be done during the section of code that is being timed.

Keywords

SNES, set, convergence, history

Examples