petsc-3.9.0 2018-04-07
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Sets the array used to hold the convergence history.


#include "petscsnes.h"  
PetscErrorCode  SNESSetConvergenceHistory(SNES snes,PetscReal a[],PetscInt its[],PetscInt na,PetscBool reset)
Logically Collective on SNES

Input Parameters

snes - iterative context obtained from SNESCreate()
a - array to hold history, this array will contain the function norms computed at each step
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


If 'a' and 'its' are NULL then space is allocated for the history. If 'na' PETSC_DECIDE or PETSC_DEFAULT then a default array of length 10000 is allocated.

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.


SNES, set, convergence, history

See Also





Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages