Line | Branch | Exec | Source |
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1 | /* | ||
2 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
3 | SLEPc - Scalable Library for Eigenvalue Problem Computations | ||
4 | Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain | ||
5 | |||
6 | This file is part of SLEPc. | ||
7 | SLEPc is distributed under a 2-clause BSD license (see LICENSE). | ||
8 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
9 | */ | ||
10 | /* | ||
11 | PEP routines related to problem setup | ||
12 | */ | ||
13 | |||
14 | #include <slepc/private/pepimpl.h> /*I "slepcpep.h" I*/ | ||
15 | |||
16 | /* | ||
17 | Let the solver choose the ST type that should be used by default, | ||
18 | otherwise set it to SHIFT. | ||
19 | This is called at PEPSetFromOptions (before STSetFromOptions) | ||
20 | and also at PEPSetUp (in case PEPSetFromOptions was not called). | ||
21 | */ | ||
22 | 3808 | PetscErrorCode PEPSetDefaultST(PEP pep) | |
23 | { | ||
24 |
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3808 | PetscFunctionBegin; |
25 |
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3808 | PetscTryTypeMethod(pep,setdefaultst); |
26 |
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3808 | if (!((PetscObject)pep->st)->type_name) PetscCall(STSetType(pep->st,STSHIFT)); |
27 |
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739 | PetscFunctionReturn(PETSC_SUCCESS); |
28 | } | ||
29 | |||
30 | /* | ||
31 | This is used in Q-Arnoldi and STOAR to set the transform flag by | ||
32 | default, otherwise the user has to explicitly run with -st_transform | ||
33 | */ | ||
34 | 338 | PetscErrorCode PEPSetDefaultST_Transform(PEP pep) | |
35 | { | ||
36 |
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338 | PetscFunctionBegin; |
37 |
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338 | PetscCall(STSetTransform(pep->st,PETSC_TRUE)); |
38 |
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66 | PetscFunctionReturn(PETSC_SUCCESS); |
39 | } | ||
40 | |||
41 | /*@ | ||
42 | PEPSetDSType - Sets the type of the internal DS object based on the current | ||
43 | settings of the polynomial eigensolver. | ||
44 | |||
45 | Collective | ||
46 | |||
47 | Input Parameter: | ||
48 | . pep - polynomial eigensolver context | ||
49 | |||
50 | Note: | ||
51 | This function need not be called explicitly, since it will be called at | ||
52 | both PEPSetFromOptions() and PEPSetUp(). | ||
53 | |||
54 | Level: developer | ||
55 | |||
56 | .seealso: PEPSetFromOptions(), PEPSetUp() | ||
57 | @*/ | ||
58 | 3798 | PetscErrorCode PEPSetDSType(PEP pep) | |
59 | { | ||
60 |
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3798 | PetscFunctionBegin; |
61 |
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3798 | PetscValidHeaderSpecific(pep,PEP_CLASSID,1); |
62 |
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3798 | PetscTryTypeMethod(pep,setdstype); |
63 |
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737 | PetscFunctionReturn(PETSC_SUCCESS); |
64 | } | ||
65 | |||
66 | /*@ | ||
67 | PEPSetUp - Sets up all the internal data structures necessary for the | ||
68 | execution of the PEP solver. | ||
69 | |||
70 | Collective | ||
71 | |||
72 | Input Parameter: | ||
73 | . pep - solver context | ||
74 | |||
75 | Notes: | ||
76 | This function need not be called explicitly in most cases, since PEPSolve() | ||
77 | calls it. It can be useful when one wants to measure the set-up time | ||
78 | separately from the solve time. | ||
79 | |||
80 | Level: developer | ||
81 | |||
82 | .seealso: PEPCreate(), PEPSolve(), PEPDestroy() | ||
83 | @*/ | ||
84 | 1986 | PetscErrorCode PEPSetUp(PEP pep) | |
85 | { | ||
86 | 1986 | SlepcSC sc; | |
87 | 1986 | PetscBool istrivial,flg; | |
88 | 1986 | PetscInt k; | |
89 | 1986 | KSP ksp; | |
90 | 1986 | PC pc; | |
91 | 1986 | PetscMPIInt size; | |
92 | 1986 | MatSolverType stype; | |
93 | |||
94 |
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1986 | PetscFunctionBegin; |
95 |
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1986 | PetscValidHeaderSpecific(pep,PEP_CLASSID,1); |
96 |
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1986 | if (pep->state) PetscFunctionReturn(PETSC_SUCCESS); |
97 |
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1956 | PetscCall(PetscLogEventBegin(PEP_SetUp,pep,0,0,0)); |
98 | |||
99 | /* reset the convergence flag from the previous solves */ | ||
100 | 1956 | pep->reason = PEP_CONVERGED_ITERATING; | |
101 | |||
102 | /* set default solver type (PEPSetFromOptions was not called) */ | ||
103 |
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1956 | if (!((PetscObject)pep)->type_name) PetscCall(PEPSetType(pep,PEPTOAR)); |
104 |
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1956 | if (!pep->st) PetscCall(PEPGetST(pep,&pep->st)); |
105 |
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1956 | PetscCall(PEPSetDefaultST(pep)); |
106 |
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1956 | if (!pep->ds) PetscCall(PEPGetDS(pep,&pep->ds)); |
107 |
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1956 | PetscCall(PEPSetDSType(pep)); |
108 |
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1956 | if (!pep->rg) PetscCall(PEPGetRG(pep,&pep->rg)); |
109 |
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1956 | if (!((PetscObject)pep->rg)->type_name) PetscCall(RGSetType(pep->rg,RGINTERVAL)); |
110 | |||
111 | /* check matrices, transfer them to ST */ | ||
112 |
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1956 | PetscCheck(pep->A,PetscObjectComm((PetscObject)pep),PETSC_ERR_ARG_WRONGSTATE,"PEPSetOperators must be called first"); |
113 |
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1956 | PetscCall(STSetMatrices(pep->st,pep->nmat,pep->A)); |
114 | |||
115 | /* set problem dimensions */ | ||
116 |
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1956 | PetscCall(MatGetSize(pep->A[0],&pep->n,NULL)); |
117 |
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1956 | PetscCall(MatGetLocalSize(pep->A[0],&pep->nloc,NULL)); |
118 | |||
119 | /* set default problem type */ | ||
120 |
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1956 | if (!pep->problem_type) PetscCall(PEPSetProblemType(pep,PEP_GENERAL)); |
121 |
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1956 | if (pep->nev > (pep->nmat-1)*pep->n) pep->nev = (pep->nmat-1)*pep->n; |
122 |
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1956 | if (pep->ncv > (pep->nmat-1)*pep->n) pep->ncv = (pep->nmat-1)*pep->n; |
123 | |||
124 | /* check consistency of refinement options */ | ||
125 |
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1956 | if (pep->refine) { |
126 |
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296 | if (!pep->scheme) { /* set default scheme */ |
127 |
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40 | PetscCall(PEPRefineGetKSP(pep,&ksp)); |
128 |
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40 | PetscCall(KSPGetPC(ksp,&pc)); |
129 |
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40 | PetscCall(PetscObjectTypeCompare((PetscObject)ksp,KSPPREONLY,&flg)); |
130 |
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40 | if (flg) PetscCall(PetscObjectTypeCompareAny((PetscObject)pc,&flg,PCLU,PCCHOLESKY,"")); |
131 |
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80 | pep->scheme = flg? PEP_REFINE_SCHEME_MBE: PEP_REFINE_SCHEME_SCHUR; |
132 | } | ||
133 |
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296 | if (pep->scheme==PEP_REFINE_SCHEME_MBE) { |
134 |
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80 | PetscCall(PEPRefineGetKSP(pep,&ksp)); |
135 |
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80 | PetscCall(KSPGetPC(ksp,&pc)); |
136 |
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80 | PetscCall(PetscObjectTypeCompare((PetscObject)ksp,KSPPREONLY,&flg)); |
137 |
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80 | if (flg) PetscCall(PetscObjectTypeCompareAny((PetscObject)pc,&flg,PCLU,PCCHOLESKY,"")); |
138 |
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80 | PetscCheck(flg,PetscObjectComm((PetscObject)pep),PETSC_ERR_SUP,"The MBE scheme for refinement requires a direct solver in KSP"); |
139 |
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80 | PetscCallMPI(MPI_Comm_size(PetscObjectComm((PetscObject)pc),&size)); |
140 |
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80 | if (size>1) { /* currently selected PC is a factorization */ |
141 | ✗ | PetscCall(PCFactorGetMatSolverType(pc,&stype)); | |
142 | ✗ | PetscCall(PetscStrcmp(stype,MATSOLVERPETSC,&flg)); | |
143 | ✗ | PetscCheck(!flg,PetscObjectComm((PetscObject)pep),PETSC_ERR_SUP,"For Newton refinement, you chose to solve linear systems with a factorization, but in parallel runs you need to select an external package"); | |
144 | } | ||
145 | } | ||
146 |
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296 | if (pep->scheme==PEP_REFINE_SCHEME_SCHUR) { |
147 |
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96 | PetscCheck(pep->npart==1,PetscObjectComm((PetscObject)pep),PETSC_ERR_SUP,"The Schur scheme for refinement does not support subcommunicators"); |
148 | } | ||
149 | } | ||
150 | /* call specific solver setup */ | ||
151 |
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1956 | PetscUseTypeMethod(pep,setup); |
152 | |||
153 | /* set tolerance if not yet set */ | ||
154 |
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1956 | if (pep->tol==(PetscReal)PETSC_DETERMINE) pep->tol = SLEPC_DEFAULT_TOL; |
155 |
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1956 | if (pep->refine) { |
156 |
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576 | if (pep->rtol==(PetscReal)PETSC_DETERMINE) pep->rtol = PetscMax(pep->tol/1000,PETSC_MACHINE_EPSILON); |
157 |
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436 | if (pep->rits==PETSC_DETERMINE) pep->rits = (pep->refine==PEP_REFINE_SIMPLE)? 10: 1; |
158 | } | ||
159 | |||
160 | /* set default extraction */ | ||
161 |
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1956 | if (!pep->extract) { |
162 |
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1686 | pep->extract = (pep->basis==PEP_BASIS_MONOMIAL)? PEP_EXTRACT_NORM: PEP_EXTRACT_NONE; |
163 | } | ||
164 | |||
165 | /* fill sorting criterion context */ | ||
166 |
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1956 | switch (pep->which) { |
167 | 628 | case PEP_LARGEST_MAGNITUDE: | |
168 | 628 | pep->sc->comparison = SlepcCompareLargestMagnitude; | |
169 | 628 | pep->sc->comparisonctx = NULL; | |
170 | 628 | break; | |
171 | ✗ | case PEP_SMALLEST_MAGNITUDE: | |
172 | ✗ | pep->sc->comparison = SlepcCompareSmallestMagnitude; | |
173 | ✗ | pep->sc->comparisonctx = NULL; | |
174 | ✗ | break; | |
175 | 28 | case PEP_LARGEST_REAL: | |
176 | 28 | pep->sc->comparison = SlepcCompareLargestReal; | |
177 | 28 | pep->sc->comparisonctx = NULL; | |
178 | 28 | break; | |
179 | ✗ | case PEP_SMALLEST_REAL: | |
180 | ✗ | pep->sc->comparison = SlepcCompareSmallestReal; | |
181 | ✗ | pep->sc->comparisonctx = NULL; | |
182 | ✗ | break; | |
183 | ✗ | case PEP_LARGEST_IMAGINARY: | |
184 | ✗ | pep->sc->comparison = SlepcCompareLargestImaginary; | |
185 | ✗ | pep->sc->comparisonctx = NULL; | |
186 | ✗ | break; | |
187 | ✗ | case PEP_SMALLEST_IMAGINARY: | |
188 | ✗ | pep->sc->comparison = SlepcCompareSmallestImaginary; | |
189 | ✗ | pep->sc->comparisonctx = NULL; | |
190 | ✗ | break; | |
191 | 1130 | case PEP_TARGET_MAGNITUDE: | |
192 | 1130 | pep->sc->comparison = SlepcCompareTargetMagnitude; | |
193 | 1130 | pep->sc->comparisonctx = &pep->target; | |
194 | 1130 | break; | |
195 | ✗ | case PEP_TARGET_REAL: | |
196 | ✗ | pep->sc->comparison = SlepcCompareTargetReal; | |
197 | ✗ | pep->sc->comparisonctx = &pep->target; | |
198 | ✗ | break; | |
199 | ✗ | case PEP_TARGET_IMAGINARY: | |
200 | ✗ | pep->sc->comparison = SlepcCompareTargetImaginary; | |
201 | ✗ | pep->sc->comparisonctx = &pep->target; | |
202 | ✗ | break; | |
203 | 145 | case PEP_ALL: | |
204 | 145 | pep->sc->comparison = SlepcCompareSmallestReal; | |
205 | 145 | pep->sc->comparisonctx = NULL; | |
206 | 145 | break; | |
207 | case PEP_WHICH_USER: | ||
208 | break; | ||
209 | } | ||
210 | 1956 | pep->sc->map = NULL; | |
211 | 1956 | pep->sc->mapobj = NULL; | |
212 | |||
213 | /* fill sorting criterion for DS */ | ||
214 |
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1956 | if (pep->which!=PEP_ALL) { |
215 |
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1811 | PetscCall(DSGetSlepcSC(pep->ds,&sc)); |
216 |
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1811 | PetscCall(RGIsTrivial(pep->rg,&istrivial)); |
217 |
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1811 | sc->rg = istrivial? NULL: pep->rg; |
218 | 1811 | sc->comparison = pep->sc->comparison; | |
219 | 1811 | sc->comparisonctx = pep->sc->comparisonctx; | |
220 | 1811 | sc->map = SlepcMap_ST; | |
221 | 1811 | sc->mapobj = (PetscObject)pep->st; | |
222 | } | ||
223 | /* setup ST */ | ||
224 |
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1956 | PetscCall(STSetUp(pep->st)); |
225 | |||
226 | /* compute matrix coefficients */ | ||
227 |
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1956 | PetscCall(STGetTransform(pep->st,&flg)); |
228 |
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1956 | if (!flg) { |
229 |
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1637 | if (pep->which!=PEP_ALL && pep->solvematcoeffs) PetscCall(STMatSetUp(pep->st,1.0,pep->solvematcoeffs)); |
230 | } else { | ||
231 |
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319 | PetscCheck(pep->basis==PEP_BASIS_MONOMIAL,PetscObjectComm((PetscObject)pep),PETSC_ERR_SUP,"Cannot use ST-transform with non-monomial basis in PEP"); |
232 | } | ||
233 | |||
234 | /* compute scale factor if no set by user */ | ||
235 |
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1956 | PetscCall(PEPComputeScaleFactor(pep)); |
236 | |||
237 | /* build balancing matrix if required */ | ||
238 |
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1956 | if (pep->scale==PEP_SCALE_DIAGONAL || pep->scale==PEP_SCALE_BOTH) { |
239 |
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184 | if (!pep->Dl) PetscCall(BVCreateVec(pep->V,&pep->Dl)); |
240 |
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184 | if (!pep->Dr) PetscCall(BVCreateVec(pep->V,&pep->Dr)); |
241 |
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184 | PetscCall(PEPBuildDiagonalScaling(pep)); |
242 | } | ||
243 | |||
244 | /* process initial vectors */ | ||
245 |
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1956 | if (pep->nini<0) { |
246 | 38 | k = -pep->nini; | |
247 |
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38 | PetscCheck(k<=pep->ncv,PetscObjectComm((PetscObject)pep),PETSC_ERR_USER_INPUT,"The number of initial vectors is larger than ncv"); |
248 |
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38 | PetscCall(BVInsertVecs(pep->V,0,&k,pep->IS,PETSC_TRUE)); |
249 |
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38 | PetscCall(SlepcBasisDestroy_Private(&pep->nini,&pep->IS)); |
250 | 38 | pep->nini = k; | |
251 | } | ||
252 |
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1956 | PetscCall(PetscLogEventEnd(PEP_SetUp,pep,0,0,0)); |
253 | 1956 | pep->state = PEP_STATE_SETUP; | |
254 |
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1956 | PetscFunctionReturn(PETSC_SUCCESS); |
255 | } | ||
256 | |||
257 | /*@ | ||
258 | PEPSetOperators - Sets the coefficient matrices associated with the polynomial | ||
259 | eigenvalue problem. | ||
260 | |||
261 | Collective | ||
262 | |||
263 | Input Parameters: | ||
264 | + pep - the eigenproblem solver context | ||
265 | . nmat - number of matrices in array A | ||
266 | - A - the array of matrices associated with the eigenproblem | ||
267 | |||
268 | Notes: | ||
269 | The polynomial eigenproblem is defined as P(l)*x=0, where l is | ||
270 | the eigenvalue, x is the eigenvector, and P(l) is defined as | ||
271 | P(l) = A_0 + l*A_1 + ... + l^d*A_d, with d=nmat-1 (the degree of P). | ||
272 | For non-monomial bases, this expression is different. | ||
273 | |||
274 | Level: beginner | ||
275 | |||
276 | .seealso: PEPSolve(), PEPGetOperators(), PEPGetNumMatrices(), PEPSetBasis() | ||
277 | @*/ | ||
278 | 1966 | PetscErrorCode PEPSetOperators(PEP pep,PetscInt nmat,Mat A[]) | |
279 | { | ||
280 | 1966 | PetscInt i,n=0,m,m0=0,mloc,nloc,mloc0=0; | |
281 | |||
282 |
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1966 | PetscFunctionBegin; |
283 |
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1966 | PetscValidHeaderSpecific(pep,PEP_CLASSID,1); |
284 |
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1966 | PetscValidLogicalCollectiveInt(pep,nmat,2); |
285 |
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1966 | PetscCheck(nmat>0,PetscObjectComm((PetscObject)pep),PETSC_ERR_ARG_OUTOFRANGE,"Non-positive value of nmat: %" PetscInt_FMT,nmat); |
286 |
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1966 | PetscCheck(nmat>2,PetscObjectComm((PetscObject)pep),PETSC_ERR_ARG_OUTOFRANGE,"Cannot solve linear eigenproblems with PEP; use EPS instead"); |
287 |
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384 | PetscAssertPointer(A,3); |
288 | |||
289 |
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9342 | for (i=0;i<nmat;i++) { |
290 |
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7376 | PetscValidHeaderSpecific(A[i],MAT_CLASSID,3); |
291 |
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7376 | PetscCheckSameComm(pep,1,A[i],3); |
292 |
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7376 | PetscCall(MatGetSize(A[i],&m,&n)); |
293 |
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7376 | PetscCall(MatGetLocalSize(A[i],&mloc,&nloc)); |
294 |
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7376 | PetscCheck(m==n,PetscObjectComm((PetscObject)pep),PETSC_ERR_ARG_WRONG,"A[%" PetscInt_FMT "] is a non-square matrix (%" PetscInt_FMT " rows, %" PetscInt_FMT " cols)",i,m,n); |
295 |
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7376 | PetscCheck(mloc==nloc,PetscObjectComm((PetscObject)pep),PETSC_ERR_ARG_WRONG,"A[%" PetscInt_FMT "] does not have equal row and column local sizes (%" PetscInt_FMT ", %" PetscInt_FMT ")",i,mloc,nloc); |
296 |
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7376 | if (!i) { m0 = m; mloc0 = mloc; } |
297 |
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7376 | PetscCheck(m==m0,PetscObjectComm((PetscObject)pep),PETSC_ERR_ARG_INCOMP,"Dimensions of A[%" PetscInt_FMT "] do not match with previous matrices (%" PetscInt_FMT ", %" PetscInt_FMT ")",i,m,m0); |
298 |
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7376 | PetscCheck(mloc==mloc0,PetscObjectComm((PetscObject)pep),PETSC_ERR_ARG_INCOMP,"Local dimensions of A[%" PetscInt_FMT "] do not match with previous matrices (%" PetscInt_FMT ", %" PetscInt_FMT ")",i,mloc,mloc0); |
299 |
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7376 | PetscCall(PetscObjectReference((PetscObject)A[i])); |
300 | } | ||
301 | |||
302 |
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1966 | if (pep->state && (n!=pep->n || nloc!=pep->nloc)) PetscCall(PEPReset(pep)); |
303 |
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1926 | else if (pep->nmat) { |
304 |
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10 | PetscCall(MatDestroyMatrices(pep->nmat,&pep->A)); |
305 |
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10 | PetscCall(PetscFree2(pep->pbc,pep->nrma)); |
306 |
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10 | PetscCall(PetscFree(pep->solvematcoeffs)); |
307 | } | ||
308 | |||
309 |
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1966 | PetscCall(PetscMalloc1(nmat,&pep->A)); |
310 |
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1966 | PetscCall(PetscCalloc2(3*nmat,&pep->pbc,nmat,&pep->nrma)); |
311 |
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9342 | for (i=0;i<nmat;i++) { |
312 | 7376 | pep->A[i] = A[i]; | |
313 | 7376 | pep->pbc[i] = 1.0; /* default to monomial basis */ | |
314 | } | ||
315 | 1966 | pep->nmat = nmat; | |
316 | 1966 | pep->state = PEP_STATE_INITIAL; | |
317 |
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1966 | PetscFunctionReturn(PETSC_SUCCESS); |
318 | } | ||
319 | |||
320 | /*@ | ||
321 | PEPGetOperators - Gets the matrices associated with the polynomial eigensystem. | ||
322 | |||
323 | Collective | ||
324 | |||
325 | Input Parameters: | ||
326 | + pep - the PEP context | ||
327 | - k - the index of the requested matrix (starting in 0) | ||
328 | |||
329 | Output Parameter: | ||
330 | . A - the requested matrix | ||
331 | |||
332 | Level: intermediate | ||
333 | |||
334 | .seealso: PEPSolve(), PEPSetOperators(), PEPGetNumMatrices() | ||
335 | @*/ | ||
336 | 625 | PetscErrorCode PEPGetOperators(PEP pep,PetscInt k,Mat *A) | |
337 | { | ||
338 |
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625 | PetscFunctionBegin; |
339 |
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625 | PetscValidHeaderSpecific(pep,PEP_CLASSID,1); |
340 |
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625 | PetscAssertPointer(A,3); |
341 |
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625 | PetscCheck(k>=0 && k<pep->nmat,PetscObjectComm((PetscObject)pep),PETSC_ERR_ARG_OUTOFRANGE,"k must be between 0 and %" PetscInt_FMT,pep->nmat-1); |
342 | 625 | *A = pep->A[k]; | |
343 |
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625 | PetscFunctionReturn(PETSC_SUCCESS); |
344 | } | ||
345 | |||
346 | /*@ | ||
347 | PEPGetNumMatrices - Returns the number of matrices stored in the PEP. | ||
348 | |||
349 | Not Collective | ||
350 | |||
351 | Input Parameter: | ||
352 | . pep - the PEP context | ||
353 | |||
354 | Output Parameters: | ||
355 | . nmat - the number of matrices passed in PEPSetOperators() | ||
356 | |||
357 | Level: intermediate | ||
358 | |||
359 | .seealso: PEPSetOperators() | ||
360 | @*/ | ||
361 | 16 | PetscErrorCode PEPGetNumMatrices(PEP pep,PetscInt *nmat) | |
362 | { | ||
363 |
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16 | PetscFunctionBegin; |
364 |
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16 | PetscValidHeaderSpecific(pep,PEP_CLASSID,1); |
365 |
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16 | PetscAssertPointer(nmat,2); |
366 | 16 | *nmat = pep->nmat; | |
367 |
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16 | PetscFunctionReturn(PETSC_SUCCESS); |
368 | } | ||
369 | |||
370 | /*@ | ||
371 | PEPSetInitialSpace - Specify a basis of vectors that constitute the initial | ||
372 | space, that is, the subspace from which the solver starts to iterate. | ||
373 | |||
374 | Collective | ||
375 | |||
376 | Input Parameters: | ||
377 | + pep - the polynomial eigensolver context | ||
378 | . n - number of vectors | ||
379 | - is - set of basis vectors of the initial space | ||
380 | |||
381 | Notes: | ||
382 | Some solvers start to iterate on a single vector (initial vector). In that case, | ||
383 | the other vectors are ignored. | ||
384 | |||
385 | These vectors do not persist from one PEPSolve() call to the other, so the | ||
386 | initial space should be set every time. | ||
387 | |||
388 | The vectors do not need to be mutually orthonormal, since they are explicitly | ||
389 | orthonormalized internally. | ||
390 | |||
391 | Common usage of this function is when the user can provide a rough approximation | ||
392 | of the wanted eigenspace. Then, convergence may be faster. | ||
393 | |||
394 | Level: intermediate | ||
395 | |||
396 | .seealso: PEPSetUp() | ||
397 | @*/ | ||
398 | 66 | PetscErrorCode PEPSetInitialSpace(PEP pep,PetscInt n,Vec is[]) | |
399 | { | ||
400 |
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66 | PetscFunctionBegin; |
401 |
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66 | PetscValidHeaderSpecific(pep,PEP_CLASSID,1); |
402 |
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66 | PetscValidLogicalCollectiveInt(pep,n,2); |
403 |
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66 | PetscCheck(n>=0,PetscObjectComm((PetscObject)pep),PETSC_ERR_ARG_OUTOFRANGE,"Argument n cannot be negative"); |
404 |
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66 | if (n>0) { |
405 |
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66 | PetscAssertPointer(is,3); |
406 |
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66 | PetscValidHeaderSpecific(*is,VEC_CLASSID,3); |
407 | } | ||
408 |
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66 | PetscCall(SlepcBasisReference_Private(n,is,&pep->nini,&pep->IS)); |
409 |
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66 | if (n>0) pep->state = PEP_STATE_INITIAL; |
410 |
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10 | PetscFunctionReturn(PETSC_SUCCESS); |
411 | } | ||
412 | |||
413 | /* | ||
414 | PEPSetDimensions_Default - Set reasonable values for ncv, mpd if not set | ||
415 | by the user. This is called at setup. | ||
416 | */ | ||
417 | 1468 | PetscErrorCode PEPSetDimensions_Default(PEP pep,PetscInt nev,PetscInt *ncv,PetscInt *mpd) | |
418 | { | ||
419 | 1468 | PetscBool krylov; | |
420 | 1468 | PetscInt dim; | |
421 | |||
422 |
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1468 | PetscFunctionBegin; |
423 |
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1468 | PetscCall(PetscObjectTypeCompareAny((PetscObject)pep,&krylov,PEPTOAR,PEPSTOAR,PEPQARNOLDI,"")); |
424 | 1468 | dim = (pep->nmat-1)*pep->n; | |
425 |
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1468 | if (*ncv!=PETSC_DETERMINE) { /* ncv set */ |
426 |
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722 | if (krylov) { |
427 |
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617 | PetscCheck(*ncv>nev || (*ncv==nev && *ncv==dim),PetscObjectComm((PetscObject)pep),PETSC_ERR_USER_INPUT,"The value of ncv must be at least nev+1"); |
428 | } else { | ||
429 |
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105 | PetscCheck(*ncv>=nev,PetscObjectComm((PetscObject)pep),PETSC_ERR_USER_INPUT,"The value of ncv must be at least nev"); |
430 | } | ||
431 |
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746 | } else if (*mpd!=PETSC_DETERMINE) { /* mpd set */ |
432 | ✗ | *ncv = PetscMin(dim,nev+(*mpd)); | |
433 | } else { /* neither set: defaults depend on nev being small or large */ | ||
434 |
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746 | if (nev<500) *ncv = PetscMin(dim,PetscMax(2*nev,nev+15)); |
435 | else { | ||
436 | ✗ | *mpd = 500; | |
437 | ✗ | *ncv = PetscMin(dim,nev+(*mpd)); | |
438 | } | ||
439 | } | ||
440 |
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1468 | if (*mpd==PETSC_DETERMINE) *mpd = *ncv; |
441 |
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286 | PetscFunctionReturn(PETSC_SUCCESS); |
442 | } | ||
443 | |||
444 | /*@ | ||
445 | PEPAllocateSolution - Allocate memory storage for common variables such | ||
446 | as eigenvalues and eigenvectors. | ||
447 | |||
448 | Collective | ||
449 | |||
450 | Input Parameters: | ||
451 | + pep - eigensolver context | ||
452 | - extra - number of additional positions, used for methods that require a | ||
453 | working basis slightly larger than ncv | ||
454 | |||
455 | Developer Notes: | ||
456 | This is SLEPC_EXTERN because it may be required by user plugin PEP | ||
457 | implementations. | ||
458 | |||
459 | Level: developer | ||
460 | |||
461 | .seealso: PEPSetUp() | ||
462 | @*/ | ||
463 | 2169 | PetscErrorCode PEPAllocateSolution(PEP pep,PetscInt extra) | |
464 | { | ||
465 | 2169 | PetscInt oldsize,requested,requestedbv; | |
466 | 2169 | Vec t; | |
467 | |||
468 |
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2169 | PetscFunctionBegin; |
469 |
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2169 | requested = (pep->lineariz? pep->ncv: pep->ncv*(pep->nmat-1)) + extra; |
470 | 2169 | requestedbv = pep->ncv + extra; | |
471 | |||
472 | /* oldsize is zero if this is the first time setup is called */ | ||
473 |
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2169 | PetscCall(BVGetSizes(pep->V,NULL,NULL,&oldsize)); |
474 | |||
475 | /* allocate space for eigenvalues and friends */ | ||
476 |
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2169 | if (requested != oldsize || !pep->eigr) { |
477 |
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2129 | PetscCall(PetscFree4(pep->eigr,pep->eigi,pep->errest,pep->perm)); |
478 |
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2129 | PetscCall(PetscMalloc4(requested,&pep->eigr,requested,&pep->eigi,requested,&pep->errest,requested,&pep->perm)); |
479 | } | ||
480 | |||
481 | /* allocate V */ | ||
482 |
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2169 | if (!pep->V) PetscCall(PEPGetBV(pep,&pep->V)); |
483 |
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2169 | if (!oldsize) { |
484 |
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1956 | if (!((PetscObject)pep->V)->type_name) PetscCall(BVSetType(pep->V,BVMAT)); |
485 |
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1956 | PetscCall(STMatCreateVecsEmpty(pep->st,&t,NULL)); |
486 |
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1956 | PetscCall(BVSetSizesFromVec(pep->V,t,requestedbv)); |
487 |
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1956 | PetscCall(VecDestroy(&t)); |
488 |
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213 | } else PetscCall(BVResize(pep->V,requestedbv,PETSC_FALSE)); |
489 |
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425 | PetscFunctionReturn(PETSC_SUCCESS); |
490 | } | ||
491 |