11 static PetscErrorCode TaoLineSearchDestroy_Armijo(TaoLineSearch ls)  in TaoLineSearchDestroy_Armijo()  argument
13   TaoLineSearch_ARMIJO *armP = (TaoLineSearch_ARMIJO *)ls->data;  in TaoLineSearchDestroy_Armijo()
19   PetscCall(PetscFree(ls->data));  in TaoLineSearchDestroy_Armijo()
23 static PetscErrorCode TaoLineSearchReset_Armijo(TaoLineSearch ls)  in TaoLineSearchReset_Armijo()  argument
25   TaoLineSearch_ARMIJO *armP = (TaoLineSearch_ARMIJO *)ls->data;  in TaoLineSearchReset_Armijo()
33 static PetscErrorCode TaoLineSearchSetFromOptions_Armijo(TaoLineSearch ls, PetscOptionItems PetscOp…  in TaoLineSearchSetFromOptions_Armijo()  argument
35   TaoLineSearch_ARMIJO *armP = (TaoLineSearch_ARMIJO *)ls->data;  in TaoLineSearchSetFromOptions_Armijo()
51 static PetscErrorCode TaoLineSearchView_Armijo(TaoLineSearch ls, PetscViewer pv)  in TaoLineSearchView_Armijo()  argument
53   TaoLineSearch_ARMIJO *armP = (TaoLineSearch_ARMIJO *)ls->data;  in TaoLineSearchView_Armijo()
61     if (ls->bounded) PetscCall(PetscViewerASCIIPrintf(pv, " (projected)"));  in TaoLineSearchView_Armijo()
88 static PetscErrorCode TaoLineSearchApply_Armijo(TaoLineSearch ls, Vec x, PetscReal *f, Vec g, Vec s)  in TaoLineSearchApply_Armijo()  argument
90   TaoLineSearch_ARMIJO *armP = (TaoLineSearch_ARMIJO *)ls->data;  in TaoLineSearchApply_Armijo()
97   PetscCall(TaoLineSearchMonitor(ls, 0, *f, 0.0));  in TaoLineSearchApply_Armijo()
99   ls->reason = TAOLINESEARCH_CONTINUE_ITERATING;  in TaoLineSearchApply_Armijo()
115     PetscCall(PetscInfo(ls, "Armijo line search error: alpha (%g) < 1\n", (double)armP->alpha));  in TaoLineSearchApply_Armijo()
116     ls->reason = TAOLINESEARCH_FAILED_BADPARAMETER;  in TaoLineSearchApply_Armijo()
118     PetscCall(PetscInfo(ls, "Armijo line search error: beta (%g) invalid\n", (double)armP->beta));  in TaoLineSearchApply_Armijo()
119     ls->reason = TAOLINESEARCH_FAILED_BADPARAMETER;  in TaoLineSearchApply_Armijo()
121 …PetscCall(PetscInfo(ls, "Armijo line search error: beta_inf (%g) invalid\n", (double)armP->beta_in…  in TaoLineSearchApply_Armijo()
122     ls->reason = TAOLINESEARCH_FAILED_BADPARAMETER;  in TaoLineSearchApply_Armijo()
124     PetscCall(PetscInfo(ls, "Armijo line search error: sigma (%g) invalid\n", (double)armP->sigma));  in TaoLineSearchApply_Armijo()
125     ls->reason = TAOLINESEARCH_FAILED_BADPARAMETER;  in TaoLineSearchApply_Armijo()
127 …PetscCall(PetscInfo(ls, "Armijo line search error: memory_size (%" PetscInt_FMT ") < 1\n", armP->m…  in TaoLineSearchApply_Armijo()
128     ls->reason = TAOLINESEARCH_FAILED_BADPARAMETER;  in TaoLineSearchApply_Armijo()
130     PetscCall(PetscInfo(ls, "Armijo line search error: reference_policy invalid\n"));  in TaoLineSearchApply_Armijo()
131     ls->reason = TAOLINESEARCH_FAILED_BADPARAMETER;  in TaoLineSearchApply_Armijo()
133     PetscCall(PetscInfo(ls, "Armijo line search error: replacement_policy invalid\n"));  in TaoLineSearchApply_Armijo()
134     ls->reason = TAOLINESEARCH_FAILED_BADPARAMETER;  in TaoLineSearchApply_Armijo()
136     PetscCall(PetscInfo(ls, "Armijo line search error: initial function inf or nan\n"));  in TaoLineSearchApply_Armijo()
137     ls->reason = TAOLINESEARCH_FAILED_BADPARAMETER;  in TaoLineSearchApply_Armijo()
140   if (ls->reason != TAOLINESEARCH_CONTINUE_ITERATING) PetscFunctionReturn(PETSC_SUCCESS);  in TaoLineSearchApply_Armijo()
176     PetscCall(PetscInfo(ls, "Initial Line Search step * g is infinity or NaN (%g)\n", (double)gdx));  in TaoLineSearchApply_Armijo()
177     ls->reason = TAOLINESEARCH_FAILED_INFORNAN;  in TaoLineSearchApply_Armijo()
181 …PetscCall(PetscInfo(ls, "Initial Line Search step is not descent direction (g's=%g)\n", (double)gd…  in TaoLineSearchApply_Armijo()
182     ls->reason = TAOLINESEARCH_FAILED_ASCENT;  in TaoLineSearchApply_Armijo()
191   ls->step = ls->initstep;  in TaoLineSearchApply_Armijo()
192   while (ls->step >= ls->stepmin && (ls->nfeval + ls->nfgeval) < ls->max_funcs) {  in TaoLineSearchApply_Armijo()
195     PetscCall(VecWAXPY(armP->work, ls->step, s, x));  in TaoLineSearchApply_Armijo()
196     if (ls->bounded) PetscCall(VecMedian(ls->lower, armP->work, ls->upper, armP->work));  in TaoLineSearchApply_Armijo()
200     if (ls->hasobjective) {  in TaoLineSearchApply_Armijo()
201       PetscCall(TaoLineSearchComputeObjective(ls, armP->work, f));  in TaoLineSearchApply_Armijo()
203     } else if (ls->usegts) {  in TaoLineSearchApply_Armijo()
204       PetscCall(TaoLineSearchComputeObjectiveAndGTS(ls, armP->work, f, &gdx));  in TaoLineSearchApply_Armijo()
207       PetscCall(TaoLineSearchComputeObjectiveAndGradient(ls, armP->work, f, g));  in TaoLineSearchApply_Armijo()
211     if (ls->step == ls->initstep) ls->f_fullstep = *f;  in TaoLineSearchApply_Armijo()
213     PetscCall(TaoLineSearchMonitor(ls, its, *f, ls->step));  in TaoLineSearchApply_Armijo()
216       ls->step *= armP->beta_inf;  in TaoLineSearchApply_Armijo()
219       if (armP->nondescending && *f <= ref - ls->step * fact * ref) break;  in TaoLineSearchApply_Armijo()
220       if (!armP->nondescending && *f <= ref + ls->step * fact) break;  in TaoLineSearchApply_Armijo()
222       ls->step *= armP->beta;  in TaoLineSearchApply_Armijo()
228     PetscCall(PetscInfo(ls, "Function is inf or nan.\n"));  in TaoLineSearchApply_Armijo()
229     ls->reason = TAOLINESEARCH_FAILED_INFORNAN;  in TaoLineSearchApply_Armijo()
230   } else if (ls->step < ls->stepmin) {  in TaoLineSearchApply_Armijo()
231     PetscCall(PetscInfo(ls, "Step length is below tolerance.\n"));  in TaoLineSearchApply_Armijo()
232     ls->reason = TAOLINESEARCH_HALTED_RTOL;  in TaoLineSearchApply_Armijo()
233   } else if ((ls->nfeval + ls->nfgeval) >= ls->max_funcs) {  in TaoLineSearchApply_Armijo()
234 …PetscInfo(ls, "Number of line search function evals (%" PetscInt_FMT ") > maximum allowed (%" Pets…  in TaoLineSearchApply_Armijo()
235     ls->reason = TAOLINESEARCH_HALTED_MAXFCN;  in TaoLineSearchApply_Armijo()
237   if (ls->reason) PetscFunctionReturn(PETSC_SUCCESS);  in TaoLineSearchApply_Armijo()
240   ls->reason          = TAOLINESEARCH_SUCCESS;  in TaoLineSearchApply_Armijo()
252   if (!g_computed) PetscCall(TaoLineSearchComputeGradient(ls, x, g));  in TaoLineSearchApply_Armijo()
253 …PetscCall(PetscInfo(ls, "%" PetscInt_FMT " function evals in line search, step = %g\n", ls->nfeval…  in TaoLineSearchApply_Armijo()
267 PETSC_EXTERN PetscErrorCode TaoLineSearchCreate_Armijo(TaoLineSearch ls)  in TaoLineSearchCreate_Armijo()  argument
272   PetscValidHeaderSpecific(ls, TAOLINESEARCH_CLASSID, 1);  in TaoLineSearchCreate_Armijo()
284   ls->data                = (void *)armP;  in TaoLineSearchCreate_Armijo()
285   ls->initstep            = 1.0;  in TaoLineSearchCreate_Armijo()
286   ls->ops->setup          = NULL;  in TaoLineSearchCreate_Armijo()
287   ls->ops->monitor        = NULL;  in TaoLineSearchCreate_Armijo()
288   ls->ops->apply          = TaoLineSearchApply_Armijo;  in TaoLineSearchCreate_Armijo()
289   ls->ops->view           = TaoLineSearchView_Armijo;  in TaoLineSearchCreate_Armijo()
290   ls->ops->destroy        = TaoLineSearchDestroy_Armijo;  in TaoLineSearchCreate_Armijo()
291   ls->ops->reset          = TaoLineSearchReset_Armijo;  in TaoLineSearchCreate_Armijo()
292   ls->ops->setfromoptions = TaoLineSearchSetFromOptions_Armijo;  in TaoLineSearchCreate_Armijo()