Actual source code: lmvm.h
1: #pragma once
2: #include <petscksp.h>
3: #include <petsc/private/matimpl.h>
4: #include <petsc/private/vecimpl.h>
6: /*
7: MATLMVM format - a base matrix-type that represents Limited-Memory
8: Variable Metric (LMVM) approximations of a Jacobian.
10: LMVM approximations can be symmetric, symmetric positive-definite,
11: rectangular, or otherwise square with no determinable properties.
12: Each derived LMVM type should automatically set its matrix properties
13: if its construction can guarantee symmetry (MAT_SYMMETRIC) or symmetric
14: positive-definiteness (MAT_SPD).
15: */
17: typedef struct _MatOps_LMVM *MatOps_LMVM;
18: struct _MatOps_LMVM {
19: PetscErrorCode (*update)(Mat, Vec, Vec);
20: PetscErrorCode (*allocate)(Mat, Vec, Vec);
21: PetscErrorCode (*reset)(Mat, PetscBool);
22: PetscErrorCode (*mult)(Mat, Vec, Vec);
23: PetscErrorCode (*copy)(Mat, Mat, MatStructure);
24: };
26: typedef struct {
27: /* Core data structures for stored updates */
28: PETSCHEADER(struct _MatOps_LMVM);
29: PetscBool allocated, prev_set;
30: PetscInt m_old, m, k, nupdates, nrejects, nresets;
31: Vec *S, *Y;
32: Vec Xprev, Fprev;
34: /* User-defined initial Jacobian tools */
35: PetscBool user_pc, user_ksp, user_scale;
36: PetscReal ksp_rtol, ksp_atol;
37: PetscInt ksp_max_it;
38: PetscReal J0scalar;
39: Vec J0diag;
40: Mat J0;
41: PC J0pc;
42: KSP J0ksp;
44: /* Data structures to support common Mat functions */
45: PetscReal shift;
47: /* Miscellenous parameters */
48: PetscBool square; /* flag for defining the LMVM approximation as a square matrix */
49: PetscReal eps; /* (default: PetscPowReal(PETSC_MACHINE_EPSILON, 2.0/3.0)) */
50: void *ctx; /* implementation specific context */
51: } Mat_LMVM;
53: /* Shared internal functions for LMVM matrices */
54: PETSC_INTERN PetscErrorCode MatUpdateKernel_LMVM(Mat, Vec, Vec);
55: PETSC_INTERN PetscErrorCode MatUpdate_LMVM(Mat, Vec, Vec);
56: PETSC_INTERN PetscErrorCode MatAllocate_LMVM(Mat, Vec, Vec);
57: PETSC_INTERN PetscErrorCode MatReset_LMVM(Mat, PetscBool);
59: /* LMVM implementations of core Mat functionality */
60: PETSC_INTERN PetscErrorCode MatSetFromOptions_LMVM(Mat, PetscOptionItems *PetscOptionsObject);
61: PETSC_INTERN PetscErrorCode MatSetUp_LMVM(Mat);
62: PETSC_INTERN PetscErrorCode MatView_LMVM(Mat, PetscViewer);
63: PETSC_INTERN PetscErrorCode MatDestroy_LMVM(Mat);
64: PETSC_INTERN PetscErrorCode MatCreate_LMVM(Mat);
66: /* Create functions for derived LMVM types */
67: PETSC_EXTERN PetscErrorCode MatCreate_LMVMDFP(Mat);
68: PETSC_EXTERN PetscErrorCode MatCreate_LMVMBFGS(Mat);
69: PETSC_EXTERN PetscErrorCode MatCreate_LMVMSR1(Mat);
70: PETSC_EXTERN PetscErrorCode MatCreate_LMVMBrdn(Mat);
71: PETSC_EXTERN PetscErrorCode MatCreate_LMVMBadBrdn(Mat);
72: PETSC_EXTERN PetscErrorCode MatCreate_LMVMSymBrdn(Mat);
73: PETSC_EXTERN PetscErrorCode MatCreate_LMVMSymBadBrdn(Mat);
74: PETSC_EXTERN PetscErrorCode MatCreate_LMVMDiagBrdn(Mat);
76: /* Solve functions for derived LMVM types (necessary only for DFP and BFGS for re-use under SymBrdn) */
77: PETSC_INTERN PetscErrorCode MatSolve_LMVMDFP(Mat, Vec, Vec);
78: PETSC_INTERN PetscErrorCode MatSolve_LMVMBFGS(Mat, Vec, Vec);
80: /* Mult functions for derived LMVM types (necessary only for DFP and BFGS for re-use under SymBrdn) */
81: PETSC_INTERN PetscErrorCode MatMult_LMVMDFP(Mat, Vec, Vec);
82: PETSC_INTERN PetscErrorCode MatMult_LMVMBFGS(Mat, Vec, Vec);