Lines Matching refs:armP

39   TaoLineSearch_OWARMIJO *armP = (TaoLineSearch_OWARMIJO *)ls->data;
42   PetscCall(PetscFree(armP->memory));
43   if (armP->x) PetscCall(PetscObjectDereference((PetscObject)armP->x));
44   PetscCall(VecDestroy(&armP->work));
51   TaoLineSearch_OWARMIJO *armP = (TaoLineSearch_OWARMIJO *)ls->data;
55   PetscCall(PetscOptionsReal("-tao_ls_OWArmijo_alpha", "initial reference constant", "", armP->alpha, &armP->alpha, NULL));
56   PetscCall(PetscOptionsReal("-tao_ls_OWArmijo_beta_inf", "decrease constant one", "", armP->beta_inf, &armP->beta_inf, NULL));
57   PetscCall(PetscOptionsReal("-tao_ls_OWArmijo_beta", "decrease constant", "", armP->beta, &armP->beta, NULL));
58   PetscCall(PetscOptionsReal("-tao_ls_OWArmijo_sigma", "acceptance constant", "", armP->sigma, &armP->sigma, NULL));
59   PetscCall(PetscOptionsInt("-tao_ls_OWArmijo_memory_size", "number of historical elements", "", armP->memorySize, &armP->memorySize, NULL));
60   PetscCall(PetscOptionsInt("-tao_ls_OWArmijo_reference_policy", "policy for updating reference value", "", armP->referencePolicy, &armP->referencePolicy, NULL));
61   PetscCall(PetscOptionsInt("-tao_ls_OWArmijo_replacement_policy", "policy for updating memory", "", armP->replacementPolicy, &armP->replacementPolicy, NULL));
62   PetscCall(PetscOptionsBool("-tao_ls_OWArmijo_nondescending", "Use nondescending OWArmijo algorithm", "", armP->nondescending, &armP->nondescending, NULL));
69   TaoLineSearch_OWARMIJO *armP = (TaoLineSearch_OWARMIJO *)ls->data;
76     if (armP->nondescending) PetscCall(PetscViewerASCIIPrintf(pv, " (nondescending)"));
77     PetscCall(PetscViewerASCIIPrintf(pv, ": alpha=%g beta=%g ", (double)armP->alpha, (double)armP->beta));
78     PetscCall(PetscViewerASCIIPrintf(pv, "sigma=%g ", (double)armP->sigma));
79     PetscCall(PetscViewerASCIIPrintf(pv, "memsize=%" PetscInt_FMT "\n", armP->memorySize));
114   TaoLineSearch_OWARMIJO *armP = (TaoLineSearch_OWARMIJO *)ls->data;
129   if (!armP->work) {
130     PetscCall(VecDuplicate(x, &armP->work));
131     armP->x = x;
132     PetscCall(PetscObjectReference((PetscObject)armP->x));
133   } else if (x != armP->x) {
134     PetscCall(VecDestroy(&armP->work));
135     PetscCall(VecDuplicate(x, &armP->work));
136     PetscCall(PetscObjectDereference((PetscObject)armP->x));
137     armP->x = x;
138     PetscCall(PetscObjectReference((PetscObject)armP->x));
144   if (armP->alpha < 1) {
145     PetscCall(PetscInfo(ls, "OWArmijo line search error: alpha (%g) < 1\n", (double)armP->alpha));
147   } else if ((armP->beta <= 0) || (armP->beta >= 1)) {
148     PetscCall(PetscInfo(ls, "OWArmijo line search error: beta (%g) invalid\n", (double)armP->beta));
150   } else if ((armP->beta_inf <= 0) || (armP->beta_inf >= 1)) {
151     PetscCall(PetscInfo(ls, "OWArmijo line search error: beta_inf (%g) invalid\n", (double)armP->beta_inf));
153   } else if ((armP->sigma <= 0) || (armP->sigma >= 0.5)) {
154     PetscCall(PetscInfo(ls, "OWArmijo line search error: sigma (%g) invalid\n", (double)armP->sigma));
156   } else if (armP->memorySize < 1) {
157     PetscCall(PetscInfo(ls, "OWArmijo line search error: memory_size (%" PetscInt_FMT ") < 1\n", armP->memorySize));
159   } else if ((armP->referencePolicy != REFERENCE_MAX) && (armP->referencePolicy != REFERENCE_AVE) && (armP->referencePolicy != REFERENCE_MEAN)) {
162   } else if ((armP->replacementPolicy != REPLACE_FIFO) && (armP->replacementPolicy != REPLACE_MRU)) {
175   if (!armP->memory) PetscCall(PetscMalloc1(armP->memorySize, &armP->memory));
177   if (!armP->memorySetup) {
178     for (i = 0; i < armP->memorySize; i++) armP->memory[i] = armP->alpha * (*f);
179     armP->current       = 0;
180     armP->lastReference = armP->memory[0];
181     armP->memorySetup   = PETSC_TRUE;
185   ref = armP->memory[0];
188   for (i = 1; i < armP->memorySize; i++) {
189     if (armP->memory[i] > ref) {
190       ref = armP->memory[i];
195   if (armP->referencePolicy == REFERENCE_AVE) {
197     for (i = 0; i < armP->memorySize; i++) ref += armP->memory[i];
198     ref = ref / armP->memorySize;
199     ref = PetscMax(ref, armP->memory[armP->current]);
200   } else if (armP->referencePolicy == REFERENCE_MEAN) {
201     ref = PetscMin(ref, 0.5 * (armP->lastReference + armP->memory[armP->current]));
204   if (armP->nondescending) fact = armP->sigma;
213     PetscCall(VecWAXPY(armP->work, ls->step, s, x));
216     PetscCall(ProjWork_OWLQN(armP->work, x, g_old, &partgdx));
233     PetscCall(TaoLineSearchComputeObjectiveAndGradient(ls, armP->work, f, g));
242       ls->step *= armP->beta_inf;
245       if (armP->nondescending && *f <= ref - ls->step * fact * ref) break;
246       if (!armP->nondescending && *f <= ref + armP->sigma * gdx) break;
247       ls->step *= armP->beta;
267   armP->lastReference = ref;
268   if (armP->replacementPolicy == REPLACE_FIFO) {
269     armP->memory[armP->current++] = *f;
270     if (armP->current >= armP->memorySize) armP->current = 0;
272     armP->current     = idx;
273     armP->memory[idx] = *f;
277   PetscCall(VecCopy(armP->work, x));
293   TaoLineSearch_OWARMIJO *armP;
297   PetscCall(PetscNew(&armP));
299   armP->memory            = NULL;
300   armP->alpha             = 1.0;
301   armP->beta              = 0.25;
302   armP->beta_inf          = 0.25;
303   armP->sigma             = 1e-4;
304   armP->memorySize        = 1;
305   armP->referencePolicy   = REFERENCE_MAX;
306   armP->replacementPolicy = REPLACE_MRU;
307   armP->nondescending     = PETSC_FALSE;
308   ls->data                = (void *)armP;