| Line | Branch | Exec | Source |
|---|---|---|---|
| 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 | EPS routines related to problem setup | ||
| 12 | */ | ||
| 13 | |||
| 14 | #include <slepc/private/epsimpl.h> /*I "slepceps.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 EPSSetFromOptions (before STSetFromOptions) | ||
| 20 | and also at EPSSetUp (in case EPSSetFromOptions was not called). | ||
| 21 | */ | ||
| 22 | 16359 | PetscErrorCode EPSSetDefaultST(EPS eps) | |
| 23 | { | ||
| 24 |
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16359 | PetscFunctionBegin; |
| 25 |
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16359 | PetscTryTypeMethod(eps,setdefaultst); |
| 26 |
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16359 | if (!((PetscObject)eps->st)->type_name) PetscCall(STSetType(eps->st,STSHIFT)); |
| 27 |
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3164 | PetscFunctionReturn(PETSC_SUCCESS); |
| 28 | } | ||
| 29 | |||
| 30 | /* | ||
| 31 | This is done by preconditioned eigensolvers that use the PC only. | ||
| 32 | It sets STPRECOND with KSPPREONLY. | ||
| 33 | */ | ||
| 34 | 1048 | PetscErrorCode EPSSetDefaultST_Precond(EPS eps) | |
| 35 | { | ||
| 36 | 1048 | KSP ksp; | |
| 37 | |||
| 38 |
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1048 | PetscFunctionBegin; |
| 39 |
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1048 | if (!((PetscObject)eps->st)->type_name) PetscCall(STSetType(eps->st,STPRECOND)); |
| 40 |
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1048 | PetscCall(STGetKSP(eps->st,&ksp)); |
| 41 |
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1048 | if (!((PetscObject)ksp)->type_name) PetscCall(KSPSetType(ksp,KSPPREONLY)); |
| 42 |
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208 | PetscFunctionReturn(PETSC_SUCCESS); |
| 43 | } | ||
| 44 | |||
| 45 | /* | ||
| 46 | This is done by preconditioned eigensolvers that can also use the KSP. | ||
| 47 | It sets STPRECOND with the default KSP (GMRES) and maxit=5. | ||
| 48 | */ | ||
| 49 | 952 | PetscErrorCode EPSSetDefaultST_GMRES(EPS eps) | |
| 50 | { | ||
| 51 | 952 | KSP ksp; | |
| 52 | |||
| 53 |
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952 | PetscFunctionBegin; |
| 54 |
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952 | if (!((PetscObject)eps->st)->type_name) PetscCall(STSetType(eps->st,STPRECOND)); |
| 55 |
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952 | PetscCall(STPrecondSetKSPHasMat(eps->st,PETSC_TRUE)); |
| 56 |
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952 | PetscCall(STGetKSP(eps->st,&ksp)); |
| 57 |
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952 | if (!((PetscObject)ksp)->type_name) { |
| 58 |
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391 | PetscCall(KSPSetType(ksp,KSPGMRES)); |
| 59 |
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391 | PetscCall(KSPSetTolerances(ksp,PETSC_CURRENT,PETSC_CURRENT,PETSC_CURRENT,5)); |
| 60 | } | ||
| 61 |
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216 | PetscFunctionReturn(PETSC_SUCCESS); |
| 62 | } | ||
| 63 | |||
| 64 | #if defined(SLEPC_HAVE_SCALAPACK) || defined(SLEPC_HAVE_ELPA) || defined(SLEPC_HAVE_ELEMENTAL) || defined(SLEPC_HAVE_EVSL) | ||
| 65 | /* | ||
| 66 | This is for direct eigensolvers that work with A and B directly, so | ||
| 67 | no need to factorize B. | ||
| 68 | */ | ||
| 69 | 192 | PetscErrorCode EPSSetDefaultST_NoFactor(EPS eps) | |
| 70 | { | ||
| 71 | 192 | KSP ksp; | |
| 72 | 192 | PC pc; | |
| 73 | |||
| 74 |
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192 | PetscFunctionBegin; |
| 75 |
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192 | if (!((PetscObject)eps->st)->type_name) PetscCall(STSetType(eps->st,STSHIFT)); |
| 76 |
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192 | PetscCall(STGetKSP(eps->st,&ksp)); |
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192 | if (!((PetscObject)ksp)->type_name) PetscCall(KSPSetType(ksp,KSPPREONLY)); |
| 78 |
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192 | PetscCall(KSPGetPC(ksp,&pc)); |
| 79 |
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192 | if (!((PetscObject)pc)->type_name) PetscCall(PCSetType(pc,PCNONE)); |
| 80 |
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24 | PetscFunctionReturn(PETSC_SUCCESS); |
| 81 | } | ||
| 82 | #endif | ||
| 83 | |||
| 84 | /* | ||
| 85 | Check that the ST selected by the user is compatible with the EPS solver and options | ||
| 86 | */ | ||
| 87 | 9742 | static PetscErrorCode EPSCheckCompatibleST(EPS eps) | |
| 88 | { | ||
| 89 | 9742 | PetscBool precond,shift,sinvert,cayley,lyapii; | |
| 90 | #if defined(PETSC_USE_COMPLEX) | ||
| 91 | 4670 | PetscScalar sigma; | |
| 92 | #endif | ||
| 93 | |||
| 94 |
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9742 | PetscFunctionBegin; |
| 95 |
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9742 | PetscCall(PetscObjectTypeCompare((PetscObject)eps->st,STPRECOND,&precond)); |
| 96 |
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9742 | PetscCall(PetscObjectTypeCompare((PetscObject)eps->st,STSHIFT,&shift)); |
| 97 |
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9742 | PetscCall(PetscObjectTypeCompare((PetscObject)eps->st,STSINVERT,&sinvert)); |
| 98 |
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9742 | PetscCall(PetscObjectTypeCompare((PetscObject)eps->st,STCAYLEY,&cayley)); |
| 99 | |||
| 100 | /* preconditioned eigensolvers */ | ||
| 101 |
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9742 | PetscCheck(eps->categ!=EPS_CATEGORY_PRECOND || precond,PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"This solver requires ST=PRECOND"); |
| 102 |
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9742 | PetscCheck(eps->categ==EPS_CATEGORY_PRECOND || !precond,PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"STPRECOND is intended for preconditioned eigensolvers only"); |
| 103 | |||
| 104 | /* harmonic extraction */ | ||
| 105 |
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9742 | PetscCheck(precond || shift || !eps->extraction || eps->extraction==EPS_RITZ,PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Cannot use a spectral transformation combined with harmonic extraction"); |
| 106 | |||
| 107 | /* real shifts in Hermitian problems */ | ||
| 108 | #if defined(PETSC_USE_COMPLEX) | ||
| 109 |
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4670 | PetscCall(STGetShift(eps->st,&sigma)); |
| 110 |
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4670 | PetscCheck(!eps->ishermitian || PetscImaginaryPart(sigma)==0.0,PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Hermitian problems are not compatible with complex shifts"); |
| 111 | #endif | ||
| 112 | |||
| 113 | /* Cayley with PGNHEP */ | ||
| 114 |
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9742 | PetscCheck(!cayley || eps->problem_type!=EPS_PGNHEP,PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Cayley spectral transformation is not compatible with PGNHEP"); |
| 115 | |||
| 116 | /* make sure that the user does not specify smallest magnitude with shift-and-invert */ | ||
| 117 |
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9742 | if ((cayley || sinvert) && (eps->categ==EPS_CATEGORY_KRYLOV || eps->categ==EPS_CATEGORY_OTHER)) { |
| 118 |
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1292 | PetscCall(PetscObjectTypeCompare((PetscObject)eps,EPSLYAPII,&lyapii)); |
| 119 |
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1292 | PetscCheck(lyapii || eps->which==EPS_TARGET_MAGNITUDE || eps->which==EPS_TARGET_REAL || eps->which==EPS_TARGET_IMAGINARY || eps->which==EPS_ALL || eps->which==EPS_WHICH_USER,PetscObjectComm((PetscObject)eps),PETSC_ERR_USER_INPUT,"Shift-and-invert requires a target 'which' (see EPSSetWhichEigenpairs), for instance -st_type sinvert -eps_target 0 -eps_target_magnitude"); |
| 120 | } | ||
| 121 |
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1874 | PetscFunctionReturn(PETSC_SUCCESS); |
| 122 | } | ||
| 123 | |||
| 124 | /* | ||
| 125 | MatEstimateSpectralRange_EPS: estimate the spectral range [left,right] of a | ||
| 126 | symmetric/Hermitian matrix A using an auxiliary EPS object | ||
| 127 | */ | ||
| 128 | 146 | PetscErrorCode MatEstimateSpectralRange_EPS(Mat A,PetscReal *left,PetscReal *right) | |
| 129 | { | ||
| 130 | 146 | PetscInt nconv; | |
| 131 | 146 | PetscScalar eig0; | |
| 132 | 146 | PetscReal tol=1e-3,errest=tol; | |
| 133 | 146 | EPS eps; | |
| 134 | |||
| 135 |
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146 | PetscFunctionBegin; |
| 136 | 146 | *left = 0.0; *right = 0.0; | |
| 137 |
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146 | PetscCall(EPSCreate(PetscObjectComm((PetscObject)A),&eps)); |
| 138 |
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146 | PetscCall(EPSSetOptionsPrefix(eps,"eps_filter_")); |
| 139 |
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146 | PetscCall(EPSSetOperators(eps,A,NULL)); |
| 140 |
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146 | PetscCall(EPSSetProblemType(eps,EPS_HEP)); |
| 141 |
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146 | PetscCall(EPSSetTolerances(eps,tol,50)); |
| 142 |
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146 | PetscCall(EPSSetConvergenceTest(eps,EPS_CONV_ABS)); |
| 143 |
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146 | PetscCall(EPSSetWhichEigenpairs(eps,EPS_SMALLEST_REAL)); |
| 144 |
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146 | PetscCall(EPSSolve(eps)); |
| 145 |
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146 | PetscCall(EPSGetConverged(eps,&nconv)); |
| 146 |
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146 | if (nconv>0) { |
| 147 |
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146 | PetscCall(EPSGetEigenvalue(eps,0,&eig0,NULL)); |
| 148 |
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146 | PetscCall(EPSGetErrorEstimate(eps,0,&errest)); |
| 149 | ✗ | } else eig0 = eps->eigr[0]; | |
| 150 | 146 | *left = PetscRealPart(eig0)-errest; | |
| 151 |
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146 | PetscCall(EPSSetWhichEigenpairs(eps,EPS_LARGEST_REAL)); |
| 152 |
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146 | PetscCall(EPSSolve(eps)); |
| 153 |
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146 | PetscCall(EPSGetConverged(eps,&nconv)); |
| 154 |
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146 | if (nconv>0) { |
| 155 |
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146 | PetscCall(EPSGetEigenvalue(eps,0,&eig0,NULL)); |
| 156 |
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146 | PetscCall(EPSGetErrorEstimate(eps,0,&errest)); |
| 157 | ✗ | } else eig0 = eps->eigr[0]; | |
| 158 | 146 | *right = PetscRealPart(eig0)+errest; | |
| 159 |
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146 | PetscCall(EPSDestroy(&eps)); |
| 160 |
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26 | PetscFunctionReturn(PETSC_SUCCESS); |
| 161 | } | ||
| 162 | |||
| 163 | /* | ||
| 164 | EPSSetUpSort_Basic: configure the EPS sorting criterion according to 'which' | ||
| 165 | */ | ||
| 166 | 9137 | PetscErrorCode EPSSetUpSort_Basic(EPS eps) | |
| 167 | { | ||
| 168 |
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9137 | PetscFunctionBegin; |
| 169 |
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9137 | switch (eps->which) { |
| 170 | 3760 | case EPS_LARGEST_MAGNITUDE: | |
| 171 | 3760 | eps->sc->comparison = SlepcCompareLargestMagnitude; | |
| 172 | 3760 | eps->sc->comparisonctx = NULL; | |
| 173 | 3760 | break; | |
| 174 | 322 | case EPS_SMALLEST_MAGNITUDE: | |
| 175 | 322 | eps->sc->comparison = SlepcCompareSmallestMagnitude; | |
| 176 | 322 | eps->sc->comparisonctx = NULL; | |
| 177 | 322 | break; | |
| 178 | 1185 | case EPS_LARGEST_REAL: | |
| 179 | 1185 | eps->sc->comparison = SlepcCompareLargestReal; | |
| 180 | 1185 | eps->sc->comparisonctx = NULL; | |
| 181 | 1185 | break; | |
| 182 | 1634 | case EPS_SMALLEST_REAL: | |
| 183 | 1634 | eps->sc->comparison = SlepcCompareSmallestReal; | |
| 184 | 1634 | eps->sc->comparisonctx = NULL; | |
| 185 | 1634 | break; | |
| 186 | 14 | case EPS_LARGEST_IMAGINARY: | |
| 187 | 14 | eps->sc->comparison = SlepcCompareLargestImaginary; | |
| 188 | 14 | eps->sc->comparisonctx = NULL; | |
| 189 | 14 | break; | |
| 190 | 10 | case EPS_SMALLEST_IMAGINARY: | |
| 191 | 10 | eps->sc->comparison = SlepcCompareSmallestImaginary; | |
| 192 | 10 | eps->sc->comparisonctx = NULL; | |
| 193 | 10 | break; | |
| 194 | 1257 | case EPS_TARGET_MAGNITUDE: | |
| 195 | 1257 | eps->sc->comparison = SlepcCompareTargetMagnitude; | |
| 196 | 1257 | eps->sc->comparisonctx = &eps->target; | |
| 197 | 1257 | break; | |
| 198 | 52 | case EPS_TARGET_REAL: | |
| 199 | 52 | eps->sc->comparison = SlepcCompareTargetReal; | |
| 200 | 52 | eps->sc->comparisonctx = &eps->target; | |
| 201 | 52 | break; | |
| 202 | 5 | case EPS_TARGET_IMAGINARY: | |
| 203 | 5 | eps->sc->comparison = SlepcCompareTargetImaginary; | |
| 204 | 5 | eps->sc->comparisonctx = &eps->target; | |
| 205 | 5 | break; | |
| 206 | 645 | case EPS_ALL: | |
| 207 | 645 | eps->sc->comparison = SlepcCompareSmallestReal; | |
| 208 | 645 | eps->sc->comparisonctx = NULL; | |
| 209 | 645 | break; | |
| 210 | case EPS_WHICH_USER: | ||
| 211 | break; | ||
| 212 | } | ||
| 213 | 9137 | eps->sc->map = NULL; | |
| 214 | 9137 | eps->sc->mapobj = NULL; | |
| 215 |
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9137 | PetscFunctionReturn(PETSC_SUCCESS); |
| 216 | } | ||
| 217 | |||
| 218 | /* | ||
| 219 | EPSSetUpSort_Default: configure both EPS and DS sorting criterion | ||
| 220 | */ | ||
| 221 | 8883 | PetscErrorCode EPSSetUpSort_Default(EPS eps) | |
| 222 | { | ||
| 223 | 8883 | SlepcSC sc; | |
| 224 | 8883 | PetscBool istrivial; | |
| 225 | |||
| 226 |
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8883 | PetscFunctionBegin; |
| 227 | /* fill sorting criterion context */ | ||
| 228 |
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8883 | PetscCall(EPSSetUpSort_Basic(eps)); |
| 229 | /* fill sorting criterion for DS */ | ||
| 230 |
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8883 | PetscCall(DSGetSlepcSC(eps->ds,&sc)); |
| 231 |
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8883 | PetscCall(RGIsTrivial(eps->rg,&istrivial)); |
| 232 |
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8883 | sc->rg = istrivial? NULL: eps->rg; |
| 233 | 8883 | sc->comparison = eps->sc->comparison; | |
| 234 | 8883 | sc->comparisonctx = eps->sc->comparisonctx; | |
| 235 | 8883 | sc->map = SlepcMap_ST; | |
| 236 | 8883 | sc->mapobj = (PetscObject)eps->st; | |
| 237 |
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8883 | PetscFunctionReturn(PETSC_SUCCESS); |
| 238 | } | ||
| 239 | |||
| 240 | /*@ | ||
| 241 | EPSSetDSType - Sets the type of the internal DS object based on the current | ||
| 242 | settings of the eigenvalue solver. | ||
| 243 | |||
| 244 | Collective | ||
| 245 | |||
| 246 | Input Parameter: | ||
| 247 | . eps - eigenproblem solver context | ||
| 248 | |||
| 249 | Note: | ||
| 250 | This function need not be called explicitly, since it will be called at | ||
| 251 | both EPSSetFromOptions() and EPSSetUp(). | ||
| 252 | |||
| 253 | Level: developer | ||
| 254 | |||
| 255 | .seealso: EPSSetFromOptions(), EPSSetUp() | ||
| 256 | @*/ | ||
| 257 | 15000 | PetscErrorCode EPSSetDSType(EPS eps) | |
| 258 | { | ||
| 259 |
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15000 | PetscFunctionBegin; |
| 260 |
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15000 | PetscValidHeaderSpecific(eps,EPS_CLASSID,1); |
| 261 |
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15000 | PetscTryTypeMethod(eps,setdstype); |
| 262 |
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2876 | PetscFunctionReturn(PETSC_SUCCESS); |
| 263 | } | ||
| 264 | |||
| 265 | /*@ | ||
| 266 | EPSSetUp - Sets up all the internal data structures necessary for the | ||
| 267 | execution of the eigensolver. Then calls STSetUp() for any set-up | ||
| 268 | operations associated to the ST object. | ||
| 269 | |||
| 270 | Collective | ||
| 271 | |||
| 272 | Input Parameter: | ||
| 273 | . eps - eigenproblem solver context | ||
| 274 | |||
| 275 | Notes: | ||
| 276 | This function need not be called explicitly in most cases, since EPSSolve() | ||
| 277 | calls it. It can be useful when one wants to measure the set-up time | ||
| 278 | separately from the solve time. | ||
| 279 | |||
| 280 | Level: developer | ||
| 281 | |||
| 282 | .seealso: EPSCreate(), EPSSolve(), EPSDestroy(), STSetUp(), EPSSetInitialSpace() | ||
| 283 | @*/ | ||
| 284 | 11582 | PetscErrorCode EPSSetUp(EPS eps) | |
| 285 | { | ||
| 286 | 11582 | Mat A,B; | |
| 287 | 11582 | PetscInt k,nmat; | |
| 288 | 11582 | PetscBool flg; | |
| 289 | 11582 | EPSStoppingCtx ctx; | |
| 290 | |||
| 291 |
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11582 | PetscFunctionBegin; |
| 292 |
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11582 | PetscValidHeaderSpecific(eps,EPS_CLASSID,1); |
| 293 |
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11582 | if (eps->state) PetscFunctionReturn(PETSC_SUCCESS); |
| 294 |
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9742 | PetscCall(PetscLogEventBegin(EPS_SetUp,eps,0,0,0)); |
| 295 | |||
| 296 | /* reset the convergence flag from the previous solves */ | ||
| 297 | 9742 | eps->reason = EPS_CONVERGED_ITERATING; | |
| 298 | |||
| 299 | /* Set default solver type (EPSSetFromOptions was not called) */ | ||
| 300 |
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9742 | if (!((PetscObject)eps)->type_name) PetscCall(EPSSetType(eps,EPSKRYLOVSCHUR)); |
| 301 |
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9742 | if (!eps->st) PetscCall(EPSGetST(eps,&eps->st)); |
| 302 |
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9742 | PetscCall(EPSSetDefaultST(eps)); |
| 303 | |||
| 304 |
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9742 | PetscCall(STSetTransform(eps->st,PETSC_TRUE)); |
| 305 |
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9742 | PetscCall(STSetStructured(eps->st,PETSC_FALSE)); |
| 306 |
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9742 | if (eps->useds && !eps->ds) PetscCall(EPSGetDS(eps,&eps->ds)); |
| 307 |
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9742 | if (eps->useds) PetscCall(EPSSetDSType(eps)); |
| 308 |
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9742 | if (eps->twosided) { |
| 309 |
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209 | PetscCheck(!eps->ishermitian || (eps->isgeneralized && !eps->ispositive),PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Two-sided methods are not intended for %s problems",SLEPC_STRING_HERMITIAN); |
| 310 | } | ||
| 311 |
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9742 | if (!eps->rg) PetscCall(EPSGetRG(eps,&eps->rg)); |
| 312 |
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9742 | if (!((PetscObject)eps->rg)->type_name) PetscCall(RGSetType(eps->rg,RGINTERVAL)); |
| 313 | |||
| 314 | /* Set problem dimensions */ | ||
| 315 |
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9742 | PetscCall(STGetNumMatrices(eps->st,&nmat)); |
| 316 |
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9742 | PetscCheck(nmat,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_WRONGSTATE,"EPSSetOperators must be called first"); |
| 317 |
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9742 | PetscCall(STMatGetSize(eps->st,&eps->n,NULL)); |
| 318 |
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9742 | PetscCall(STMatGetLocalSize(eps->st,&eps->nloc,NULL)); |
| 319 | |||
| 320 | /* Set default problem type */ | ||
| 321 |
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9742 | if (!eps->problem_type) { |
| 322 |
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433 | if (nmat==1) PetscCall(EPSSetProblemType(eps,EPS_NHEP)); |
| 323 |
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41 | else PetscCall(EPSSetProblemType(eps,EPS_GNHEP)); |
| 324 |
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9309 | } else if (nmat==1 && eps->isgeneralized) { |
| 325 |
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3 | PetscCall(PetscInfo(eps,"Eigenproblem set as generalized but no matrix B was provided; reverting to a standard eigenproblem\n")); |
| 326 | 3 | eps->isgeneralized = PETSC_FALSE; | |
| 327 |
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6 | eps->problem_type = eps->ishermitian? EPS_HEP: EPS_NHEP; |
| 328 |
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9306 | } else PetscCheck(nmat==1 || eps->isgeneralized,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_INCOMP,"Inconsistent EPS state: the problem type does not match the number of matrices"); |
| 329 | |||
| 330 |
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9742 | if (eps->isstructured) { |
| 331 | /* make sure the user has set the appropriate matrix */ | ||
| 332 |
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369 | PetscCall(STGetMatrix(eps->st,0,&A)); |
| 333 |
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369 | if (eps->problem_type==EPS_BSE) PetscCall(SlepcCheckMatStruct(A,SLEPC_MAT_STRUCT_BSE,NULL)); |
| 334 |
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369 | if (eps->problem_type==EPS_HAMILT) PetscCall(SlepcCheckMatStruct(A,SLEPC_MAT_STRUCT_HAMILT,NULL)); |
| 335 | } | ||
| 336 | |||
| 337 | /* safeguard for small problems */ | ||
| 338 |
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9742 | if (eps->n == 0) PetscFunctionReturn(PETSC_SUCCESS); |
| 339 |
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9742 | if (eps->nev > eps->n) eps->nev = eps->n; |
| 340 |
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9742 | if (eps->problem_type == EPS_BSE) { |
| 341 |
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334 | if (2*eps->ncv > eps->n) eps->ncv = eps->n/2; |
| 342 | } else { | ||
| 343 |
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9408 | if (eps->ncv > eps->n) eps->ncv = eps->n; |
| 344 | } | ||
| 345 | |||
| 346 | /* check some combinations of eps->which */ | ||
| 347 |
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9742 | PetscCheck(!eps->ishermitian || (eps->isgeneralized && !eps->ispositive) || (eps->which!=EPS_LARGEST_IMAGINARY && eps->which!=EPS_SMALLEST_IMAGINARY && eps->which!=EPS_TARGET_IMAGINARY),PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Sorting the eigenvalues along the imaginary axis is not allowed when all eigenvalues are real"); |
| 348 | |||
| 349 | /* initialization of matrix norms */ | ||
| 350 |
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9742 | if (eps->conv==EPS_CONV_NORM) { |
| 351 |
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496 | if (!eps->nrma) { |
| 352 |
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496 | PetscCall(STGetMatrix(eps->st,0,&A)); |
| 353 |
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496 | PetscCall(MatNorm(A,NORM_INFINITY,&eps->nrma)); |
| 354 | } | ||
| 355 |
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496 | if (nmat>1 && !eps->nrmb) { |
| 356 |
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486 | PetscCall(STGetMatrix(eps->st,1,&B)); |
| 357 |
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486 | PetscCall(MatNorm(B,NORM_INFINITY,&eps->nrmb)); |
| 358 | } | ||
| 359 | } | ||
| 360 | |||
| 361 | /* call specific solver setup */ | ||
| 362 |
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9742 | PetscUseTypeMethod(eps,setup); |
| 363 | |||
| 364 | /* threshold stopping test */ | ||
| 365 |
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9742 | if (eps->stop==EPS_STOP_THRESHOLD) { |
| 366 |
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146 | PetscCheck(eps->thres!=PETSC_MIN_REAL,PetscObjectComm((PetscObject)eps),PETSC_ERR_USER_INPUT,"Must give a threshold value with EPSSetThreshold()"); |
| 367 |
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146 | PetscCheck(eps->which==EPS_LARGEST_MAGNITUDE || eps->which==EPS_SMALLEST_MAGNITUDE || eps->which==EPS_LARGEST_REAL || eps->which==EPS_SMALLEST_REAL || eps->which==EPS_TARGET_MAGNITUDE,PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Threshold stopping test can only be used with largest/smallest/target magnitude or largest/smallest real selection of eigenvalues"); |
| 368 |
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146 | if (eps->which==EPS_LARGEST_REAL || eps->which==EPS_SMALLEST_REAL) PetscCheck(eps->problem_type==EPS_HEP || eps->problem_type==EPS_GHEP || eps->problem_type==EPS_BSE,PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Threshold stopping test with largest/smallest real can only be used in problems that have all eigenvaues real"); |
| 369 |
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146 | else PetscCheck(eps->thres>0.0,PetscObjectComm((PetscObject)eps),PETSC_ERR_USER_INPUT,"In case of largest/smallest/target magnitude the threshold value must be positive"); |
| 370 |
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146 | PetscCheck(eps->which==EPS_LARGEST_MAGNITUDE || eps->which==EPS_TARGET_MAGNITUDE || !eps->threlative,PetscObjectComm((PetscObject)eps),PETSC_ERR_USER_INPUT,"Can only use a relative threshold with largest/target magnitude selection of eigenvalues"); |
| 371 |
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146 | PetscCall(PetscNew(&ctx)); |
| 372 | 146 | ctx->thres = eps->thres; | |
| 373 | 146 | ctx->threlative = eps->threlative; | |
| 374 | 146 | ctx->which = eps->which; | |
| 375 |
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146 | PetscCall(EPSSetStoppingTestFunction(eps,EPSStoppingThreshold,ctx,PetscCtxDestroyDefault)); |
| 376 | } | ||
| 377 | |||
| 378 | /* if purification is set, check that it really makes sense */ | ||
| 379 |
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9742 | if (eps->purify) { |
| 380 |
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6921 | if (eps->categ==EPS_CATEGORY_PRECOND || eps->categ==EPS_CATEGORY_CONTOUR) eps->purify = PETSC_FALSE; |
| 381 | else { | ||
| 382 |
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5259 | if (!eps->isgeneralized) eps->purify = PETSC_FALSE; |
| 383 |
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|
1490 | else if (!eps->ishermitian && !eps->ispositive) eps->purify = PETSC_FALSE; |
| 384 | else { | ||
| 385 |
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1164 | PetscCall(PetscObjectTypeCompare((PetscObject)eps->st,STCAYLEY,&flg)); |
| 386 |
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1164 | if (flg) eps->purify = PETSC_FALSE; |
| 387 | } | ||
| 388 | } | ||
| 389 | } | ||
| 390 | |||
| 391 | /* set tolerance if not yet set */ | ||
| 392 |
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9742 | if (eps->tol==(PetscReal)PETSC_DETERMINE) eps->tol = SLEPC_DEFAULT_TOL; |
| 393 | |||
| 394 | /* set up sorting criterion */ | ||
| 395 |
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9742 | PetscTryTypeMethod(eps,setupsort); |
| 396 | |||
| 397 | /* Build balancing matrix if required */ | ||
| 398 |
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9742 | if (eps->balance!=EPS_BALANCE_USER) { |
| 399 |
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9742 | PetscCall(STSetBalanceMatrix(eps->st,NULL)); |
| 400 |
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9742 | if (!eps->ishermitian && (eps->balance==EPS_BALANCE_ONESIDE || eps->balance==EPS_BALANCE_TWOSIDE)) { |
| 401 |
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130 | if (!eps->D) PetscCall(BVCreateVec(eps->V,&eps->D)); |
| 402 |
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130 | PetscCall(EPSBuildBalance_Krylov(eps)); |
| 403 |
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130 | PetscCall(STSetBalanceMatrix(eps->st,eps->D)); |
| 404 | } | ||
| 405 | } | ||
| 406 | |||
| 407 | /* Setup ST */ | ||
| 408 |
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9742 | PetscCall(STSetUp(eps->st)); |
| 409 |
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9742 | PetscCall(EPSCheckCompatibleST(eps)); |
| 410 | |||
| 411 | /* process deflation and initial vectors */ | ||
| 412 |
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9742 | if (eps->nds<0) { |
| 413 |
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148 | PetscCheck(!eps->isstructured,PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Deflation space is not supported in structured eigenproblems"); |
| 414 | 148 | k = -eps->nds; | |
| 415 |
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148 | PetscCall(BVInsertConstraints(eps->V,&k,eps->defl)); |
| 416 |
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148 | PetscCall(SlepcBasisDestroy_Private(&eps->nds,&eps->defl)); |
| 417 | 148 | eps->nds = k; | |
| 418 |
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148 | PetscCall(STCheckNullSpace(eps->st,eps->V)); |
| 419 | } | ||
| 420 |
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9742 | if (eps->nini<0) { |
| 421 | 2553 | k = -eps->nini; | |
| 422 |
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2553 | PetscCheck(k<=eps->ncv,PetscObjectComm((PetscObject)eps),PETSC_ERR_USER_INPUT,"The number of initial vectors is larger than ncv"); |
| 423 |
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2553 | PetscCall(BVInsertVecs(eps->V,0,&k,eps->IS,PETSC_TRUE)); |
| 424 |
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2553 | PetscCall(SlepcBasisDestroy_Private(&eps->nini,&eps->IS)); |
| 425 | 2553 | eps->nini = k; | |
| 426 | } | ||
| 427 |
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9742 | if (eps->twosided && eps->ninil<0) { |
| 428 | 40 | k = -eps->ninil; | |
| 429 |
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40 | PetscCheck(k<=eps->ncv,PetscObjectComm((PetscObject)eps),PETSC_ERR_USER_INPUT,"The number of left initial vectors is larger than ncv"); |
| 430 |
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40 | PetscCall(BVInsertVecs(eps->W,0,&k,eps->ISL,PETSC_TRUE)); |
| 431 |
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40 | PetscCall(SlepcBasisDestroy_Private(&eps->ninil,&eps->ISL)); |
| 432 | 40 | eps->ninil = k; | |
| 433 | } | ||
| 434 | |||
| 435 |
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9742 | PetscCall(PetscLogEventEnd(EPS_SetUp,eps,0,0,0)); |
| 436 | 9742 | eps->state = EPS_STATE_SETUP; | |
| 437 |
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9742 | PetscFunctionReturn(PETSC_SUCCESS); |
| 438 | } | ||
| 439 | |||
| 440 | /*@ | ||
| 441 | EPSSetOperators - Sets the matrices associated with the eigenvalue problem. | ||
| 442 | |||
| 443 | Collective | ||
| 444 | |||
| 445 | Input Parameters: | ||
| 446 | + eps - the eigenproblem solver context | ||
| 447 | . A - the matrix associated with the eigensystem | ||
| 448 | - B - the second matrix in the case of generalized eigenproblems | ||
| 449 | |||
| 450 | Notes: | ||
| 451 | To specify a standard eigenproblem, use NULL for parameter B. | ||
| 452 | |||
| 453 | It must be called before EPSSetUp(). If it is called again after EPSSetUp() and | ||
| 454 | the matrix sizes have changed then the EPS object is reset. | ||
| 455 | |||
| 456 | For structured eigenproblem types such as EPS_BSE (see EPSSetProblemType()), the | ||
| 457 | provided matrices must have been created with the corresponding helper function, | ||
| 458 | i.e., MatCreateBSE(). | ||
| 459 | |||
| 460 | Level: beginner | ||
| 461 | |||
| 462 | .seealso: EPSSolve(), EPSSetUp(), EPSReset(), EPSGetST(), STGetMatrix(), EPSSetProblemType() | ||
| 463 | @*/ | ||
| 464 | 8169 | PetscErrorCode EPSSetOperators(EPS eps,Mat A,Mat B) | |
| 465 | { | ||
| 466 | 8169 | PetscInt m,n,m0,mloc,nloc,mloc0,nmat; | |
| 467 | 8169 | Mat mat[2]; | |
| 468 | |||
| 469 |
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8169 | PetscFunctionBegin; |
| 470 |
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8169 | PetscValidHeaderSpecific(eps,EPS_CLASSID,1); |
| 471 |
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8169 | PetscValidHeaderSpecific(A,MAT_CLASSID,2); |
| 472 |
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8169 | if (B) PetscValidHeaderSpecific(B,MAT_CLASSID,3); |
| 473 |
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8169 | PetscCheckSameComm(eps,1,A,2); |
| 474 |
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8169 | if (B) PetscCheckSameComm(eps,1,B,3); |
| 475 | |||
| 476 | /* Check matrix sizes */ | ||
| 477 |
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8169 | PetscCall(MatGetSize(A,&m,&n)); |
| 478 |
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8169 | PetscCall(MatGetLocalSize(A,&mloc,&nloc)); |
| 479 |
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8169 | PetscCheck(m==n,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_WRONG,"A is a non-square matrix (%" PetscInt_FMT " rows, %" PetscInt_FMT " cols)",m,n); |
| 480 |
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8169 | PetscCheck(mloc==nloc,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_WRONG,"A does not have equal row and column sizes (%" PetscInt_FMT ", %" PetscInt_FMT ")",mloc,nloc); |
| 481 |
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8169 | if (B) { |
| 482 |
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2311 | PetscCall(MatGetSize(B,&m0,&n)); |
| 483 |
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2311 | PetscCall(MatGetLocalSize(B,&mloc0,&nloc)); |
| 484 |
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2311 | PetscCheck(m0==n,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_WRONG,"B is a non-square matrix (%" PetscInt_FMT " rows, %" PetscInt_FMT " cols)",m0,n); |
| 485 |
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2311 | PetscCheck(mloc0==nloc,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_WRONG,"B does not have equal row and column local sizes (%" PetscInt_FMT ", %" PetscInt_FMT ")",mloc0,nloc); |
| 486 |
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2311 | PetscCheck(m==m0,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_INCOMP,"Dimensions of A and B do not match (%" PetscInt_FMT ", %" PetscInt_FMT ")",m,m0); |
| 487 |
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2311 | PetscCheck(mloc==mloc0,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_INCOMP,"Local dimensions of A and B do not match (%" PetscInt_FMT ", %" PetscInt_FMT ")",mloc,mloc0); |
| 488 | } | ||
| 489 |
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8169 | if (eps->state && (n!=eps->n || nloc!=eps->nloc)) PetscCall(EPSReset(eps)); |
| 490 | 8169 | eps->nrma = 0.0; | |
| 491 | 8169 | eps->nrmb = 0.0; | |
| 492 |
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8169 | if (!eps->st) PetscCall(EPSGetST(eps,&eps->st)); |
| 493 | 8169 | mat[0] = A; | |
| 494 |
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8169 | if (B) { |
| 495 | 2311 | mat[1] = B; | |
| 496 | 2311 | nmat = 2; | |
| 497 | } else nmat = 1; | ||
| 498 |
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8169 | PetscCall(STSetMatrices(eps->st,nmat,mat)); |
| 499 | 8169 | eps->state = EPS_STATE_INITIAL; | |
| 500 |
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8169 | PetscFunctionReturn(PETSC_SUCCESS); |
| 501 | } | ||
| 502 | |||
| 503 | /*@ | ||
| 504 | EPSGetOperators - Gets the matrices associated with the eigensystem. | ||
| 505 | |||
| 506 | Collective | ||
| 507 | |||
| 508 | Input Parameter: | ||
| 509 | . eps - the EPS context | ||
| 510 | |||
| 511 | Output Parameters: | ||
| 512 | + A - the matrix associated with the eigensystem | ||
| 513 | - B - the second matrix in the case of generalized eigenproblems | ||
| 514 | |||
| 515 | Note: | ||
| 516 | Does not increase the reference count of the matrices, so you should not destroy them. | ||
| 517 | |||
| 518 | Level: intermediate | ||
| 519 | |||
| 520 | .seealso: EPSSolve(), EPSGetST(), STGetMatrix(), STSetMatrices() | ||
| 521 | @*/ | ||
| 522 | 11367 | PetscErrorCode EPSGetOperators(EPS eps,Mat *A,Mat *B) | |
| 523 | { | ||
| 524 | 11367 | ST st; | |
| 525 | 11367 | PetscInt k; | |
| 526 | |||
| 527 |
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11367 | PetscFunctionBegin; |
| 528 |
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11367 | PetscValidHeaderSpecific(eps,EPS_CLASSID,1); |
| 529 |
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11367 | PetscCall(EPSGetST(eps,&st)); |
| 530 |
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11367 | PetscCall(STGetNumMatrices(st,&k)); |
| 531 |
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11367 | if (A) { |
| 532 |
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5879 | if (k<1) *A = NULL; |
| 533 |
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5879 | else PetscCall(STGetMatrix(st,0,A)); |
| 534 | } | ||
| 535 |
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11367 | if (B) { |
| 536 |
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7273 | if (k<2) *B = NULL; |
| 537 |
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|
6861 | else PetscCall(STGetMatrix(st,1,B)); |
| 538 | } | ||
| 539 |
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|
2238 | PetscFunctionReturn(PETSC_SUCCESS); |
| 540 | } | ||
| 541 | |||
| 542 | /*@ | ||
| 543 | EPSSetDeflationSpace - Specify a basis of vectors that constitute the deflation | ||
| 544 | space. | ||
| 545 | |||
| 546 | Collective | ||
| 547 | |||
| 548 | Input Parameters: | ||
| 549 | + eps - the eigenproblem solver context | ||
| 550 | . n - number of vectors | ||
| 551 | - v - set of basis vectors of the deflation space | ||
| 552 | |||
| 553 | Notes: | ||
| 554 | When a deflation space is given, the eigensolver seeks the eigensolution | ||
| 555 | in the restriction of the problem to the orthogonal complement of this | ||
| 556 | space. This can be used for instance in the case that an invariant | ||
| 557 | subspace is known beforehand (such as the nullspace of the matrix). | ||
| 558 | |||
| 559 | These vectors do not persist from one EPSSolve() call to the other, so the | ||
| 560 | deflation space should be set every time. | ||
| 561 | |||
| 562 | The vectors do not need to be mutually orthonormal, since they are explicitly | ||
| 563 | orthonormalized internally. | ||
| 564 | |||
| 565 | Level: intermediate | ||
| 566 | |||
| 567 | .seealso: EPSSetInitialSpace() | ||
| 568 | @*/ | ||
| 569 | 161 | PetscErrorCode EPSSetDeflationSpace(EPS eps,PetscInt n,Vec v[]) | |
| 570 | { | ||
| 571 |
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161 | PetscFunctionBegin; |
| 572 |
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161 | PetscValidHeaderSpecific(eps,EPS_CLASSID,1); |
| 573 |
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161 | PetscValidLogicalCollectiveInt(eps,n,2); |
| 574 |
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161 | PetscCheck(n>=0,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_OUTOFRANGE,"Argument n cannot be negative"); |
| 575 |
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161 | if (n>0) { |
| 576 |
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158 | PetscAssertPointer(v,3); |
| 577 |
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158 | PetscValidHeaderSpecific(*v,VEC_CLASSID,3); |
| 578 | } | ||
| 579 |
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161 | PetscCall(SlepcBasisReference_Private(n,v,&eps->nds,&eps->defl)); |
| 580 |
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161 | if (n>0) eps->state = EPS_STATE_INITIAL; |
| 581 |
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31 | PetscFunctionReturn(PETSC_SUCCESS); |
| 582 | } | ||
| 583 | |||
| 584 | /*@ | ||
| 585 | EPSSetInitialSpace - Specify a basis of vectors that constitute the initial | ||
| 586 | space, that is, the subspace from which the solver starts to iterate. | ||
| 587 | |||
| 588 | Collective | ||
| 589 | |||
| 590 | Input Parameters: | ||
| 591 | + eps - the eigenproblem solver context | ||
| 592 | . n - number of vectors | ||
| 593 | - is - set of basis vectors of the initial space | ||
| 594 | |||
| 595 | Notes: | ||
| 596 | Some solvers start to iterate on a single vector (initial vector). In that case, | ||
| 597 | the other vectors are ignored. | ||
| 598 | |||
| 599 | These vectors do not persist from one EPSSolve() call to the other, so the | ||
| 600 | initial space should be set every time. | ||
| 601 | |||
| 602 | The vectors do not need to be mutually orthonormal, since they are explicitly | ||
| 603 | orthonormalized internally. | ||
| 604 | |||
| 605 | Common usage of this function is when the user can provide a rough approximation | ||
| 606 | of the wanted eigenspace. Then, convergence may be faster. | ||
| 607 | |||
| 608 | Level: intermediate | ||
| 609 | |||
| 610 | .seealso: EPSSetLeftInitialSpace(), EPSSetDeflationSpace() | ||
| 611 | @*/ | ||
| 612 | 2570 | PetscErrorCode EPSSetInitialSpace(EPS eps,PetscInt n,Vec is[]) | |
| 613 | { | ||
| 614 |
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2570 | PetscFunctionBegin; |
| 615 |
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2570 | PetscValidHeaderSpecific(eps,EPS_CLASSID,1); |
| 616 |
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2570 | PetscValidLogicalCollectiveInt(eps,n,2); |
| 617 |
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2570 | PetscCheck(n>=0,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_OUTOFRANGE,"Argument n cannot be negative"); |
| 618 |
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2570 | if (n>0) { |
| 619 |
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2563 | PetscAssertPointer(is,3); |
| 620 |
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2563 | PetscValidHeaderSpecific(*is,VEC_CLASSID,3); |
| 621 | } | ||
| 622 |
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2570 | PetscCall(SlepcBasisReference_Private(n,is,&eps->nini,&eps->IS)); |
| 623 |
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2570 | if (n>0) eps->state = EPS_STATE_INITIAL; |
| 624 |
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478 | PetscFunctionReturn(PETSC_SUCCESS); |
| 625 | } | ||
| 626 | |||
| 627 | /*@ | ||
| 628 | EPSSetLeftInitialSpace - Specify a basis of vectors that constitute the left | ||
| 629 | initial space, used by two-sided solvers to start the left subspace. | ||
| 630 | |||
| 631 | Collective | ||
| 632 | |||
| 633 | Input Parameters: | ||
| 634 | + eps - the eigenproblem solver context | ||
| 635 | . n - number of vectors | ||
| 636 | - isl - set of basis vectors of the left initial space | ||
| 637 | |||
| 638 | Notes: | ||
| 639 | Left initial vectors are used to initiate the left search space in two-sided | ||
| 640 | eigensolvers. Users should pass here an approximation of the left eigenspace, | ||
| 641 | if available. | ||
| 642 | |||
| 643 | The same comments in EPSSetInitialSpace() are applicable here. | ||
| 644 | |||
| 645 | Level: intermediate | ||
| 646 | |||
| 647 | .seealso: EPSSetInitialSpace(), EPSSetTwoSided() | ||
| 648 | @*/ | ||
| 649 | 40 | PetscErrorCode EPSSetLeftInitialSpace(EPS eps,PetscInt n,Vec isl[]) | |
| 650 | { | ||
| 651 |
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40 | PetscFunctionBegin; |
| 652 |
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40 | PetscValidHeaderSpecific(eps,EPS_CLASSID,1); |
| 653 |
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40 | PetscValidLogicalCollectiveInt(eps,n,2); |
| 654 |
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40 | PetscCheck(n>=0,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_OUTOFRANGE,"Argument n cannot be negative"); |
| 655 |
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40 | if (n>0) { |
| 656 |
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40 | PetscAssertPointer(isl,3); |
| 657 |
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40 | PetscValidHeaderSpecific(*isl,VEC_CLASSID,3); |
| 658 | } | ||
| 659 |
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40 | PetscCall(SlepcBasisReference_Private(n,isl,&eps->ninil,&eps->ISL)); |
| 660 |
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40 | if (n>0) eps->state = EPS_STATE_INITIAL; |
| 661 |
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8 | PetscFunctionReturn(PETSC_SUCCESS); |
| 662 | } | ||
| 663 | |||
| 664 | /* | ||
| 665 | EPSSetDimensions_Default - Set reasonable values for ncv, mpd if not set | ||
| 666 | by the user. This is called at setup. | ||
| 667 | */ | ||
| 668 | 6961 | PetscErrorCode EPSSetDimensions_Default(EPS eps,PetscInt *nev,PetscInt *ncv,PetscInt *mpd) | |
| 669 | { | ||
| 670 | 6961 | PetscBool krylov; | |
| 671 |
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6961 | PetscInt nev2, n = eps->problem_type==EPS_BSE? eps->n/2: eps->n; |
| 672 | |||
| 673 |
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6961 | PetscFunctionBegin; |
| 674 |
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6961 | if (*nev==0 && eps->stop!=EPS_STOP_THRESHOLD) *nev = 1; |
| 675 |
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6961 | nev2 = eps->problem_type==EPS_BSE? (*nev+1)/2: *nev; |
| 676 |
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6961 | if (*ncv!=PETSC_DETERMINE) { /* ncv set */ |
| 677 |
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|
3711 | PetscCall(PetscObjectTypeCompareAny((PetscObject)eps,&krylov,EPSKRYLOVSCHUR,EPSARNOLDI,EPSLANCZOS,"")); |
| 678 |
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3711 | if (krylov) { |
| 679 |
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3533 | PetscCheck(*ncv>=nev2+1 || (*ncv==nev2 && *ncv==n),PetscObjectComm((PetscObject)eps),PETSC_ERR_USER_INPUT,"The value of ncv must be at least nev+1"); |
| 680 | } else { | ||
| 681 |
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178 | PetscCheck(*ncv>=nev2,PetscObjectComm((PetscObject)eps),PETSC_ERR_USER_INPUT,"The value of ncv must be at least nev"); |
| 682 | } | ||
| 683 |
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3250 | } else if (*mpd!=PETSC_DETERMINE) { /* mpd set */ |
| 684 | 60 | *ncv = PetscMin(n,nev2+(*mpd)); | |
| 685 | } else { /* neither set: defaults depend on nev being small or large */ | ||
| 686 |
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3190 | if (nev2<500) *ncv = PetscMin(n,PetscMax(2*(nev2),nev2+15)); |
| 687 | else { | ||
| 688 | ✗ | *mpd = 500; | |
| 689 | ✗ | *ncv = PetscMin(n,nev2+(*mpd)); | |
| 690 | } | ||
| 691 | } | ||
| 692 |
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6961 | if (*mpd==PETSC_DETERMINE) *mpd = *ncv; |
| 693 |
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|
1308 | PetscFunctionReturn(PETSC_SUCCESS); |
| 694 | } | ||
| 695 | |||
| 696 | /*@ | ||
| 697 | EPSAllocateSolution - Allocate memory storage for common variables such | ||
| 698 | as eigenvalues and eigenvectors. | ||
| 699 | |||
| 700 | Collective | ||
| 701 | |||
| 702 | Input Parameters: | ||
| 703 | + eps - eigensolver context | ||
| 704 | - extra - number of additional positions, used for methods that require a | ||
| 705 | working basis slightly larger than ncv | ||
| 706 | |||
| 707 | Developer Notes: | ||
| 708 | This is SLEPC_EXTERN because it may be required by user plugin EPS | ||
| 709 | implementations. | ||
| 710 | |||
| 711 | Level: developer | ||
| 712 | |||
| 713 | .seealso: EPSSetUp() | ||
| 714 | @*/ | ||
| 715 | 9742 | PetscErrorCode EPSAllocateSolution(EPS eps,PetscInt extra) | |
| 716 | { | ||
| 717 | 9742 | PetscInt oldsize,requested; | |
| 718 | 9742 | PetscRandom rand; | |
| 719 | 9742 | Vec t; | |
| 720 | |||
| 721 |
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9742 | PetscFunctionBegin; |
| 722 | 9742 | requested = eps->ncv + extra; | |
| 723 | |||
| 724 | /* oldsize is zero if this is the first time setup is called */ | ||
| 725 |
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9742 | PetscCall(BVGetSizes(eps->V,NULL,NULL,&oldsize)); |
| 726 | |||
| 727 | /* allocate space for eigenvalues and friends */ | ||
| 728 |
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9742 | if (requested != oldsize || !eps->eigr) { |
| 729 |
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7294 | PetscCall(PetscFree4(eps->eigr,eps->eigi,eps->errest,eps->perm)); |
| 730 |
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7294 | PetscCall(PetscMalloc4(requested,&eps->eigr,requested,&eps->eigi,requested,&eps->errest,requested,&eps->perm)); |
| 731 | } | ||
| 732 | |||
| 733 | /* workspace for the case of arbitrary selection */ | ||
| 734 |
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9742 | if (eps->arbitrary) { |
| 735 |
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82 | if (eps->rr) PetscCall(PetscFree2(eps->rr,eps->ri)); |
| 736 |
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82 | PetscCall(PetscMalloc2(requested,&eps->rr,requested,&eps->ri)); |
| 737 | } | ||
| 738 | |||
| 739 | /* allocate V */ | ||
| 740 |
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9742 | if (!eps->V) PetscCall(EPSGetBV(eps,&eps->V)); |
| 741 |
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9742 | if (!oldsize) { |
| 742 |
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7153 | if (!((PetscObject)eps->V)->type_name) PetscCall(BVSetType(eps->V,BVMAT)); |
| 743 |
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7153 | PetscCall(STMatCreateVecsEmpty(eps->st,&t,NULL)); |
| 744 |
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7153 | PetscCall(BVSetSizesFromVec(eps->V,t,requested)); |
| 745 |
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7153 | PetscCall(VecDestroy(&t)); |
| 746 |
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2589 | } else PetscCall(BVResize(eps->V,requested,PETSC_FALSE)); |
| 747 | |||
| 748 | /* allocate W */ | ||
| 749 |
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9742 | if (eps->twosided) { |
| 750 |
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209 | PetscCall(BVGetRandomContext(eps->V,&rand)); /* make sure the random context is available when duplicating */ |
| 751 |
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209 | PetscCall(BVDestroy(&eps->W)); |
| 752 |
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209 | PetscCall(BVDuplicate(eps->V,&eps->W)); |
| 753 | } | ||
| 754 |
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1874 | PetscFunctionReturn(PETSC_SUCCESS); |
| 755 | } | ||
| 756 | |||
| 757 | /*@ | ||
| 758 | EPSReallocateSolution - Reallocate memory storage for common variables such | ||
| 759 | as the eigenvalues and the basis vectors. | ||
| 760 | |||
| 761 | Collective | ||
| 762 | |||
| 763 | Input Parameters: | ||
| 764 | + eps - eigensolver context | ||
| 765 | - newsize - new size | ||
| 766 | |||
| 767 | Developer Notes: | ||
| 768 | This is SLEPC_EXTERN because it may be required by user plugin EPS | ||
| 769 | implementations. | ||
| 770 | |||
| 771 | This is called during the iteration in case the threshold stopping test has | ||
| 772 | been selected. | ||
| 773 | |||
| 774 | Level: developer | ||
| 775 | |||
| 776 | .seealso: EPSAllocateSolution(), EPSSetThreshold() | ||
| 777 | @*/ | ||
| 778 | 73 | PetscErrorCode EPSReallocateSolution(EPS eps,PetscInt newsize) | |
| 779 | { | ||
| 780 | 73 | PetscInt oldsize,*nperm; | |
| 781 | 73 | PetscReal *nerrest; | |
| 782 | 73 | PetscScalar *neigr,*neigi; | |
| 783 | |||
| 784 |
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73 | PetscFunctionBegin; |
| 785 |
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73 | PetscCall(BVGetSizes(eps->V,NULL,NULL,&oldsize)); |
| 786 |
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73 | if (oldsize>=newsize) PetscFunctionReturn(PETSC_SUCCESS); |
| 787 |
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73 | PetscCall(PetscInfo(eps,"Reallocating basis vectors to %" PetscInt_FMT " columns\n",newsize)); |
| 788 | |||
| 789 | /* reallocate eigenvalues */ | ||
| 790 |
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73 | PetscCall(PetscMalloc4(newsize,&neigr,newsize,&neigi,newsize,&nerrest,newsize,&nperm)); |
| 791 |
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73 | PetscCall(PetscArraycpy(neigr,eps->eigr,oldsize)); |
| 792 |
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73 | PetscCall(PetscArraycpy(neigi,eps->eigi,oldsize)); |
| 793 |
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73 | PetscCall(PetscArraycpy(nerrest,eps->errest,oldsize)); |
| 794 |
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73 | PetscCall(PetscArraycpy(nperm,eps->perm,oldsize)); |
| 795 |
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73 | PetscCall(PetscFree4(eps->eigr,eps->eigi,eps->errest,eps->perm)); |
| 796 | 73 | eps->eigr = neigr; | |
| 797 | 73 | eps->eigi = neigi; | |
| 798 | 73 | eps->errest = nerrest; | |
| 799 | 73 | eps->perm = nperm; | |
| 800 | /* reallocate V,W */ | ||
| 801 |
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73 | PetscCall(BVResize(eps->V,newsize,PETSC_TRUE)); |
| 802 |
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73 | if (eps->twosided) PetscCall(BVResize(eps->W,newsize,PETSC_TRUE)); |
| 803 |
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15 | PetscFunctionReturn(PETSC_SUCCESS); |
| 804 | } | ||
| 805 |