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

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.

See Also#

SNES, SNESSolve(), SNESGetConvergenceHistory()





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Index of all SNES routines
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