| 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 | Implements the ST class for preconditioned eigenvalue methods | ||
| 12 | */ | ||
| 13 | |||
| 14 | #include <slepc/private/stimpl.h> /*I "slepcst.h" I*/ | ||
| 15 | |||
| 16 | typedef struct { | ||
| 17 | PetscBool ksphasmat; /* the KSP must have the same matrix as PC */ | ||
| 18 | } ST_PRECOND; | ||
| 19 | |||
| 20 | 2851 | static PetscErrorCode STSetDefaultKSP_Precond(ST st) | |
| 21 | { | ||
| 22 | 2851 | PC pc; | |
| 23 | 2851 | PCType pctype; | |
| 24 | 2851 | PetscBool t0,t1; | |
| 25 | |||
| 26 |
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2851 | PetscFunctionBegin; |
| 27 |
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2851 | PetscCall(KSPGetPC(st->ksp,&pc)); |
| 28 |
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2851 | PetscCall(PCGetType(pc,&pctype)); |
| 29 |
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2851 | if (!pctype && st->A && st->A[0]) { |
| 30 |
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990 | if (st->matmode == ST_MATMODE_SHELL) PetscCall(PCSetType(pc,PCJACOBI)); |
| 31 | else { | ||
| 32 |
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970 | PetscCall(MatHasOperation(st->A[0],MATOP_DUPLICATE,&t0)); |
| 33 |
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970 | if (st->nmat>1) PetscCall(MatHasOperation(st->A[0],MATOP_AXPY,&t1)); |
| 34 | 724 | else t1 = PETSC_TRUE; | |
| 35 |
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970 | PetscCall(PCSetType(pc,(t0 && t1)?PCBJACOBI:PCNONE)); |
| 36 | } | ||
| 37 | } | ||
| 38 |
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2851 | PetscCall(KSPSetErrorIfNotConverged(st->ksp,PETSC_FALSE)); |
| 39 |
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591 | PetscFunctionReturn(PETSC_SUCCESS); |
| 40 | } | ||
| 41 | |||
| 42 | 1990 | static PetscErrorCode STPostSolve_Precond(ST st) | |
| 43 | { | ||
| 44 |
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1990 | PetscFunctionBegin; |
| 45 |
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1990 | if (st->matmode == ST_MATMODE_INPLACE && !(st->Pmat || (PetscAbsScalar(st->sigma)>=PETSC_MAX_REAL && st->nmat>1))) { |
| 46 |
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10 | if (st->nmat>1) PetscCall(MatAXPY(st->A[0],st->sigma,st->A[1],st->str)); |
| 47 |
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10 | else PetscCall(MatShift(st->A[0],st->sigma)); |
| 48 | 10 | st->Astate[0] = ((PetscObject)st->A[0])->state; | |
| 49 | 10 | st->state = ST_STATE_INITIAL; | |
| 50 | 10 | st->opready = PETSC_FALSE; | |
| 51 | } | ||
| 52 |
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408 | PetscFunctionReturn(PETSC_SUCCESS); |
| 53 | } | ||
| 54 | |||
| 55 | /* | ||
| 56 | Operator (precond): | ||
| 57 | Op P M | ||
| 58 | if nmat=1: --- A-sI NULL | ||
| 59 | if nmat=2: --- A-sB NULL | ||
| 60 | */ | ||
| 61 | 1727 | static PetscErrorCode STComputeOperator_Precond(ST st) | |
| 62 | { | ||
| 63 |
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1727 | PetscFunctionBegin; |
| 64 | /* if the user did not set the shift, use the target value */ | ||
| 65 |
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1727 | if (!st->sigma_set) st->sigma = st->defsigma; |
| 66 | 1727 | st->M = NULL; | |
| 67 | |||
| 68 | /* build custom preconditioner from the split matrices */ | ||
| 69 |
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1727 | if (st->Psplit) { |
| 70 |
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30 | if (!(PetscAbsScalar(st->sigma) < PETSC_MAX_REAL) && st->nmat>1) { |
| 71 | ✗ | PetscCall(PetscObjectReference((PetscObject)st->Psplit[0])); | |
| 72 | ✗ | PetscCall(MatDestroy(&st->Pmat)); | |
| 73 | ✗ | st->Pmat = st->Psplit[0]; | |
| 74 |
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30 | } else if (PetscAbsScalar(st->sigma)<PETSC_MAX_REAL) PetscCall(STMatMAXPY_Private(st,-st->sigma,0.0,0,NULL,PETSC_TRUE,PETSC_TRUE,&st->Pmat)); |
| 75 | } | ||
| 76 | |||
| 77 | /* P = A-sigma*B */ | ||
| 78 |
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1727 | if (st->Pmat) { |
| 79 |
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210 | PetscCall(PetscObjectReference((PetscObject)st->Pmat)); |
| 80 |
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210 | PetscCall(MatDestroy(&st->P)); |
| 81 | 210 | st->P = st->Pmat; | |
| 82 | } else { | ||
| 83 |
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1517 | PetscCall(PetscObjectReference((PetscObject)st->A[1])); |
| 84 |
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1517 | PetscCall(MatDestroy(&st->T[0])); |
| 85 | 1517 | st->T[0] = st->A[1]; | |
| 86 |
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1517 | if (!(PetscAbsScalar(st->sigma) < PETSC_MAX_REAL) && st->nmat>1) { |
| 87 |
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92 | PetscCall(PetscObjectReference((PetscObject)st->T[0])); |
| 88 |
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92 | PetscCall(MatDestroy(&st->P)); |
| 89 | 92 | st->P = st->T[0]; | |
| 90 |
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1425 | } else if (PetscAbsScalar(st->sigma)<PETSC_MAX_REAL) { |
| 91 |
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1083 | PetscCall(STMatMAXPY_Private(st,-st->sigma,0.0,0,NULL,PetscNot(st->state==ST_STATE_UPDATED),PETSC_FALSE,&st->T[1])); |
| 92 |
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1083 | PetscCall(PetscObjectReference((PetscObject)st->T[1])); |
| 93 |
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1083 | PetscCall(MatDestroy(&st->P)); |
| 94 | 1083 | st->P = st->T[1]; | |
| 95 | } | ||
| 96 | } | ||
| 97 |
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357 | PetscFunctionReturn(PETSC_SUCCESS); |
| 98 | } | ||
| 99 | |||
| 100 | 1842 | static PetscErrorCode STSetUp_Precond(ST st) | |
| 101 | { | ||
| 102 | 1842 | ST_PRECOND *ctx = (ST_PRECOND*)st->data; | |
| 103 | |||
| 104 |
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1842 | PetscFunctionBegin; |
| 105 |
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1842 | if (st->P) { |
| 106 |
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2148 | PetscCall(ST_KSPSetOperators(st,ctx->ksphasmat?st->P:NULL,st->P)); |
| 107 | /* NOTE: we do not call KSPSetUp() here because some eigensolvers such as JD require a lazy setup */ | ||
| 108 | } | ||
| 109 |
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380 | PetscFunctionReturn(PETSC_SUCCESS); |
| 110 | } | ||
| 111 | |||
| 112 | 30 | static PetscErrorCode STSetShift_Precond(ST st,PetscScalar newshift) | |
| 113 | { | ||
| 114 | 30 | ST_PRECOND *ctx = (ST_PRECOND*)st->data; | |
| 115 | |||
| 116 |
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30 | PetscFunctionBegin; |
| 117 |
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30 | if (st->Psplit) { /* update custom preconditioner from the split matrices */ |
| 118 | ✗ | if (PetscAbsScalar(st->sigma)<PETSC_MAX_REAL || st->nmat==1) PetscCall(STMatMAXPY_Private(st,-st->sigma,0.0,0,NULL,PETSC_FALSE,PETSC_TRUE,&st->Pmat)); | |
| 119 | } | ||
| 120 |
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30 | if (st->transform && !st->Pmat) { |
| 121 |
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30 | PetscCall(STMatMAXPY_Private(st,-newshift,-st->sigma,0,NULL,PETSC_FALSE,PETSC_FALSE,&st->T[1])); |
| 122 |
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30 | if (st->P!=st->T[1]) { |
| 123 |
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10 | PetscCall(PetscObjectReference((PetscObject)st->T[1])); |
| 124 |
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10 | PetscCall(MatDestroy(&st->P)); |
| 125 | 10 | st->P = st->T[1]; | |
| 126 | } | ||
| 127 | } | ||
| 128 |
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60 | if (st->P) PetscCall(ST_KSPSetOperators(st,ctx->ksphasmat?st->P:NULL,st->P)); |
| 129 |
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6 | PetscFunctionReturn(PETSC_SUCCESS); |
| 130 | } | ||
| 131 | |||
| 132 | 1276 | static PetscErrorCode STPrecondSetKSPHasMat_Precond(ST st,PetscBool ksphasmat) | |
| 133 | { | ||
| 134 | 1276 | ST_PRECOND *ctx = (ST_PRECOND*)st->data; | |
| 135 | |||
| 136 |
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1276 | PetscFunctionBegin; |
| 137 |
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1276 | if (ctx->ksphasmat != ksphasmat) { |
| 138 | 777 | ctx->ksphasmat = ksphasmat; | |
| 139 | 777 | st->state = ST_STATE_INITIAL; | |
| 140 | } | ||
| 141 |
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1276 | PetscFunctionReturn(PETSC_SUCCESS); |
| 142 | } | ||
| 143 | |||
| 144 | /*@ | ||
| 145 | STPrecondSetKSPHasMat - Sets a flag indicating that during STSetUp the coefficient | ||
| 146 | matrix of the KSP linear solver (A) must be set to be the same matrix as the | ||
| 147 | preconditioner (P). | ||
| 148 | |||
| 149 | Collective | ||
| 150 | |||
| 151 | Input Parameters: | ||
| 152 | + st - the spectral transformation context | ||
| 153 | - ksphasmat - the flag | ||
| 154 | |||
| 155 | Notes: | ||
| 156 | Often, the preconditioner matrix is used only in the PC object, but | ||
| 157 | in some solvers this matrix must be provided also as the A-matrix in | ||
| 158 | the KSP object. | ||
| 159 | |||
| 160 | Level: developer | ||
| 161 | |||
| 162 | .seealso: STPrecondGetKSPHasMat(), STSetShift() | ||
| 163 | @*/ | ||
| 164 | 1296 | PetscErrorCode STPrecondSetKSPHasMat(ST st,PetscBool ksphasmat) | |
| 165 | { | ||
| 166 |
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1296 | PetscFunctionBegin; |
| 167 |
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1296 | PetscValidHeaderSpecific(st,ST_CLASSID,1); |
| 168 |
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1296 | PetscValidLogicalCollectiveBool(st,ksphasmat,2); |
| 169 |
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1296 | PetscTryMethod(st,"STPrecondSetKSPHasMat_C",(ST,PetscBool),(st,ksphasmat)); |
| 170 |
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1296 | PetscFunctionReturn(PETSC_SUCCESS); |
| 171 | } | ||
| 172 | |||
| 173 | 20 | static PetscErrorCode STPrecondGetKSPHasMat_Precond(ST st,PetscBool *ksphasmat) | |
| 174 | { | ||
| 175 | 20 | ST_PRECOND *ctx = (ST_PRECOND*)st->data; | |
| 176 | |||
| 177 |
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20 | PetscFunctionBegin; |
| 178 | 20 | *ksphasmat = ctx->ksphasmat; | |
| 179 |
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20 | PetscFunctionReturn(PETSC_SUCCESS); |
| 180 | } | ||
| 181 | |||
| 182 | /*@ | ||
| 183 | STPrecondGetKSPHasMat - Returns the flag indicating if the coefficient | ||
| 184 | matrix of the KSP linear system (A) is set to be the same matrix as the | ||
| 185 | preconditioner (P). | ||
| 186 | |||
| 187 | Not Collective | ||
| 188 | |||
| 189 | Input Parameter: | ||
| 190 | . st - the spectral transformation context | ||
| 191 | |||
| 192 | Output Parameter: | ||
| 193 | . ksphasmat - the flag | ||
| 194 | |||
| 195 | Level: developer | ||
| 196 | |||
| 197 | .seealso: STPrecondSetKSPHasMat(), STSetShift() | ||
| 198 | @*/ | ||
| 199 | 20 | PetscErrorCode STPrecondGetKSPHasMat(ST st,PetscBool *ksphasmat) | |
| 200 | { | ||
| 201 |
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20 | PetscFunctionBegin; |
| 202 |
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20 | PetscValidHeaderSpecific(st,ST_CLASSID,1); |
| 203 |
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20 | PetscAssertPointer(ksphasmat,2); |
| 204 |
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20 | PetscUseMethod(st,"STPrecondGetKSPHasMat_C",(ST,PetscBool*),(st,ksphasmat)); |
| 205 |
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20 | PetscFunctionReturn(PETSC_SUCCESS); |
| 206 | } | ||
| 207 | |||
| 208 | 1522 | static PetscErrorCode STDestroy_Precond(ST st) | |
| 209 | { | ||
| 210 |
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1522 | PetscFunctionBegin; |
| 211 |
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1522 | PetscCall(PetscFree(st->data)); |
| 212 |
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1522 | PetscCall(PetscObjectComposeFunction((PetscObject)st,"STPrecondGetKSPHasMat_C",NULL)); |
| 213 |
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1522 | PetscCall(PetscObjectComposeFunction((PetscObject)st,"STPrecondSetKSPHasMat_C",NULL)); |
| 214 |
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316 | PetscFunctionReturn(PETSC_SUCCESS); |
| 215 | } | ||
| 216 | |||
| 217 | 1522 | SLEPC_EXTERN PetscErrorCode STCreate_Precond(ST st) | |
| 218 | { | ||
| 219 | 1522 | ST_PRECOND *ctx; | |
| 220 | |||
| 221 |
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1522 | PetscFunctionBegin; |
| 222 |
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1522 | PetscCall(PetscNew(&ctx)); |
| 223 | 1522 | st->data = (void*)ctx; | |
| 224 | |||
| 225 | 1522 | st->usesksp = PETSC_TRUE; | |
| 226 | |||
| 227 | 1522 | st->ops->apply = STApply_Generic; | |
| 228 | 1522 | st->ops->applymat = STApplyMat_Generic; | |
| 229 | 1522 | st->ops->applytrans = STApplyTranspose_Generic; | |
| 230 | 1522 | st->ops->applyhermtrans = STApplyHermitianTranspose_Generic; | |
| 231 | 1522 | st->ops->setshift = STSetShift_Precond; | |
| 232 | 1522 | st->ops->getbilinearform = STGetBilinearForm_Default; | |
| 233 | 1522 | st->ops->setup = STSetUp_Precond; | |
| 234 | 1522 | st->ops->computeoperator = STComputeOperator_Precond; | |
| 235 | 1522 | st->ops->postsolve = STPostSolve_Precond; | |
| 236 | 1522 | st->ops->destroy = STDestroy_Precond; | |
| 237 | 1522 | st->ops->setdefaultksp = STSetDefaultKSP_Precond; | |
| 238 | |||
| 239 |
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1522 | PetscCall(PetscObjectComposeFunction((PetscObject)st,"STPrecondGetKSPHasMat_C",STPrecondGetKSPHasMat_Precond)); |
| 240 |
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1522 | PetscCall(PetscObjectComposeFunction((PetscObject)st,"STPrecondSetKSPHasMat_C",STPrecondSetKSPHasMat_Precond)); |
| 241 |
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316 | PetscFunctionReturn(PETSC_SUCCESS); |
| 242 | } | ||
| 243 |