Actual source code: chebyshevimpl.h

  1: /*
  2:     Private data structure for Chebyshev Iteration
  3: */

  5: #ifndef PETSC_CHEBYSHEVIMPL_H
  6: #define PETSC_CHEBYSHEVIMPL_H

  8: #include <petsc/private/kspimpl.h>

 10: typedef struct {
 11:   PetscReal emin, emax;                   /* store user provided estimates of extreme eigenvalues or computed with kspest and transformed with tform[] */
 12:   PetscReal emin_computed, emax_computed; /* eigenvalues as computed by kspest, if computed */
 13:   PetscReal emin_provided, emax_provided; /* provided by PCGAMG; discarded unless preconditioned by Jacobi */
 14:   KSP       kspest;                       /* KSP used to estimate eigenvalues */
 15:   PetscReal tform[4];                     /* transform from Krylov estimates to Chebyshev bounds */
 16:   PetscInt  eststeps;                     /* number of kspest steps in KSP used to estimate eigenvalues */
 17:   PetscBool usenoisy;                     /* use noisy right hand side vector to estimate eigenvalues */
 18:   /* For tracking when to update the eigenvalue estimates */
 19:   PetscObjectId    amatid, pmatid;
 20:   PetscObjectState amatstate, pmatstate;
 21: } KSP_Chebyshev;

 23: #endif // PETSC_CHEBYSHEVIMPL_H