| 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 | static char help[] = "Test ST with four matrices and split preconditioner.\n\n"; | ||
| 12 | |||
| 13 | #include <slepcst.h> | ||
| 14 | |||
| 15 | 20 | int main(int argc,char **argv) | |
| 16 | { | ||
| 17 | 20 | Mat A,B,C,D,Pa,Pb,Pc,Pd,Pmat,mat[4]; | |
| 18 | 20 | ST st; | |
| 19 | 20 | KSP ksp; | |
| 20 | 20 | PC pc; | |
| 21 | 20 | Vec v,w; | |
| 22 | 20 | STType type; | |
| 23 | 20 | PetscScalar sigma; | |
| 24 | 20 | PetscInt n=10,i,Istart,Iend; | |
| 25 | |||
| 26 |
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20 | PetscFunctionBeginUser; |
| 27 |
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20 | PetscCall(SlepcInitialize(&argc,&argv,NULL,help)); |
| 28 |
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20 | PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL)); |
| 29 |
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20 | PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\nTest ST with four matrices, n=%" PetscInt_FMT "\n\n",n)); |
| 30 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 31 | Compute the operator matrices | ||
| 32 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ | ||
| 33 | |||
| 34 |
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20 | PetscCall(MatCreate(PETSC_COMM_WORLD,&A)); |
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20 | PetscCall(MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,n,n)); |
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20 | PetscCall(MatSetFromOptions(A)); |
| 37 | |||
| 38 |
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20 | PetscCall(MatCreate(PETSC_COMM_WORLD,&B)); |
| 39 |
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20 | PetscCall(MatSetSizes(B,PETSC_DECIDE,PETSC_DECIDE,n,n)); |
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20 | PetscCall(MatSetFromOptions(B)); |
| 41 | |||
| 42 |
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20 | PetscCall(MatCreate(PETSC_COMM_WORLD,&C)); |
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20 | PetscCall(MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,n,n)); |
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20 | PetscCall(MatSetFromOptions(C)); |
| 45 | |||
| 46 |
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20 | PetscCall(MatCreate(PETSC_COMM_WORLD,&D)); |
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20 | PetscCall(MatSetSizes(D,PETSC_DECIDE,PETSC_DECIDE,n,n)); |
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20 | PetscCall(MatSetFromOptions(D)); |
| 49 | |||
| 50 |
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20 | PetscCall(MatGetOwnershipRange(A,&Istart,&Iend)); |
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220 | for (i=Istart;i<Iend;i++) { |
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200 | PetscCall(MatSetValue(A,i,i,2.0,INSERT_VALUES)); |
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200 | if (i>0) { |
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180 | PetscCall(MatSetValue(A,i,i-1,-1.0,INSERT_VALUES)); |
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180 | PetscCall(MatSetValue(B,i,i,(PetscScalar)i,INSERT_VALUES)); |
| 56 |
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20 | } else PetscCall(MatSetValue(B,i,i,-1.0,INSERT_VALUES)); |
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200 | if (i<n-1) PetscCall(MatSetValue(A,i,i+1,-1.0,INSERT_VALUES)); |
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200 | PetscCall(MatSetValue(C,i,n-i-1,1.0,INSERT_VALUES)); |
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200 | PetscCall(MatSetValue(D,i,i,i*.1,INSERT_VALUES)); |
| 60 |
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200 | if (i==0) PetscCall(MatSetValue(D,0,n-1,1.0,INSERT_VALUES)); |
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200 | if (i==n-1) PetscCall(MatSetValue(D,n-1,0,1.0,INSERT_VALUES)); |
| 62 | } | ||
| 63 | |||
| 64 |
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20 | PetscCall(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY)); |
| 65 |
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20 | PetscCall(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY)); |
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20 | PetscCall(MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY)); |
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20 | PetscCall(MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY)); |
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20 | PetscCall(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY)); |
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20 | PetscCall(MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY)); |
| 70 |
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20 | PetscCall(MatAssemblyBegin(D,MAT_FINAL_ASSEMBLY)); |
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20 | PetscCall(MatAssemblyEnd(D,MAT_FINAL_ASSEMBLY)); |
| 72 |
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20 | PetscCall(MatCreateVecs(A,&v,&w)); |
| 73 |
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20 | PetscCall(VecSet(v,1.0)); |
| 74 | |||
| 75 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 76 | Compute the split preconditioner matrices (four diagonals) | ||
| 77 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ | ||
| 78 | |||
| 79 |
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20 | PetscCall(MatCreate(PETSC_COMM_WORLD,&Pa)); |
| 80 |
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20 | PetscCall(MatSetSizes(Pa,PETSC_DECIDE,PETSC_DECIDE,n,n)); |
| 81 |
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20 | PetscCall(MatSetFromOptions(Pa)); |
| 82 | |||
| 83 |
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20 | PetscCall(MatCreate(PETSC_COMM_WORLD,&Pb)); |
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20 | PetscCall(MatSetSizes(Pb,PETSC_DECIDE,PETSC_DECIDE,n,n)); |
| 85 |
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20 | PetscCall(MatSetFromOptions(Pb)); |
| 86 | |||
| 87 |
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20 | PetscCall(MatCreate(PETSC_COMM_WORLD,&Pc)); |
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20 | PetscCall(MatSetSizes(Pc,PETSC_DECIDE,PETSC_DECIDE,n,n)); |
| 89 |
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20 | PetscCall(MatSetFromOptions(Pc)); |
| 90 | |||
| 91 |
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20 | PetscCall(MatCreate(PETSC_COMM_WORLD,&Pd)); |
| 92 |
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20 | PetscCall(MatSetSizes(Pd,PETSC_DECIDE,PETSC_DECIDE,n,n)); |
| 93 |
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20 | PetscCall(MatSetFromOptions(Pd)); |
| 94 | |||
| 95 |
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20 | PetscCall(MatGetOwnershipRange(Pa,&Istart,&Iend)); |
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220 | for (i=Istart;i<Iend;i++) { |
| 97 |
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200 | PetscCall(MatSetValue(Pa,i,i,2.0,INSERT_VALUES)); |
| 98 |
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200 | if (i>0) PetscCall(MatSetValue(Pb,i,i,(PetscScalar)i,INSERT_VALUES)); |
| 99 |
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20 | else PetscCall(MatSetValue(Pb,i,i,-1.0,INSERT_VALUES)); |
| 100 |
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200 | PetscCall(MatSetValue(Pd,i,i,i*.1,INSERT_VALUES)); |
| 101 | } | ||
| 102 | |||
| 103 |
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20 | PetscCall(MatAssemblyBegin(Pa,MAT_FINAL_ASSEMBLY)); |
| 104 |
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20 | PetscCall(MatAssemblyEnd(Pa,MAT_FINAL_ASSEMBLY)); |
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20 | PetscCall(MatAssemblyBegin(Pb,MAT_FINAL_ASSEMBLY)); |
| 106 |
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20 | PetscCall(MatAssemblyEnd(Pb,MAT_FINAL_ASSEMBLY)); |
| 107 |
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20 | PetscCall(MatAssemblyBegin(Pc,MAT_FINAL_ASSEMBLY)); |
| 108 |
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20 | PetscCall(MatAssemblyEnd(Pc,MAT_FINAL_ASSEMBLY)); |
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20 | PetscCall(MatAssemblyBegin(Pd,MAT_FINAL_ASSEMBLY)); |
| 110 |
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20 | PetscCall(MatAssemblyEnd(Pd,MAT_FINAL_ASSEMBLY)); |
| 111 | |||
| 112 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 113 | Create the spectral transformation object | ||
| 114 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ | ||
| 115 | |||
| 116 |
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20 | PetscCall(STCreate(PETSC_COMM_WORLD,&st)); |
| 117 | 20 | mat[0] = A; | |
| 118 | 20 | mat[1] = B; | |
| 119 | 20 | mat[2] = C; | |
| 120 | 20 | mat[3] = D; | |
| 121 |
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20 | PetscCall(STSetMatrices(st,4,mat)); |
| 122 | 20 | mat[0] = Pa; | |
| 123 | 20 | mat[1] = Pb; | |
| 124 | 20 | mat[2] = Pc; | |
| 125 | 20 | mat[3] = Pd; | |
| 126 |
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20 | PetscCall(STSetSplitPreconditioner(st,4,mat,SUBSET_NONZERO_PATTERN)); |
| 127 |
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20 | PetscCall(STGetKSP(st,&ksp)); |
| 128 |
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20 | PetscCall(KSPSetTolerances(ksp,100*PETSC_MACHINE_EPSILON,PETSC_CURRENT,PETSC_CURRENT,PETSC_CURRENT)); |
| 129 |
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20 | PetscCall(STSetTransform(st,PETSC_TRUE)); |
| 130 |
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20 | PetscCall(STSetFromOptions(st)); |
| 131 |
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20 | PetscCall(STGetKSP(st,&ksp)); |
| 132 |
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20 | PetscCall(KSPGetPC(ksp,&pc)); |
| 133 | |||
| 134 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 135 | Apply the operator | ||
| 136 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ | ||
| 137 | |||
| 138 | /* sigma=0.0 */ | ||
| 139 |
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20 | PetscCall(STSetUp(st)); |
| 140 |
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20 | PetscCall(STGetType(st,&type)); |
| 141 |
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20 | PetscCall(PetscPrintf(PETSC_COMM_WORLD,"ST type %s\n",type)); |
| 142 |
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20 | PetscCall(PCGetOperators(pc,NULL,&Pmat)); |
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20 | PetscCall(MatView(Pmat,NULL)); |
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20 | PetscCall(STMatSolve(st,v,w)); |
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20 | PetscCall(VecView(w,NULL)); |
| 146 | |||
| 147 | /* sigma=0.1 */ | ||
| 148 | 20 | sigma = 0.1; | |
| 149 |
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20 | PetscCall(STSetShift(st,sigma)); |
| 150 |
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20 | PetscCall(STGetShift(st,&sigma)); |
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20 | PetscCall(PetscPrintf(PETSC_COMM_WORLD,"With shift=%g\n",(double)PetscRealPart(sigma))); |
| 152 |
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20 | PetscCall(PCGetOperators(pc,NULL,&Pmat)); |
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20 | PetscCall(MatView(Pmat,NULL)); |
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20 | PetscCall(STMatSolve(st,v,w)); |
| 155 |
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20 | PetscCall(VecView(w,NULL)); |
| 156 | |||
| 157 |
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20 | PetscCall(STDestroy(&st)); |
| 158 |
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20 | PetscCall(MatDestroy(&A)); |
| 159 |
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20 | PetscCall(MatDestroy(&B)); |
| 160 |
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20 | PetscCall(MatDestroy(&C)); |
| 161 |
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20 | PetscCall(MatDestroy(&D)); |
| 162 |
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20 | PetscCall(MatDestroy(&Pa)); |
| 163 |
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20 | PetscCall(MatDestroy(&Pb)); |
| 164 |
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20 | PetscCall(MatDestroy(&Pc)); |
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20 | PetscCall(MatDestroy(&Pd)); |
| 166 |
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20 | PetscCall(VecDestroy(&v)); |
| 167 |
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20 | PetscCall(VecDestroy(&w)); |
| 168 |
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20 | PetscCall(SlepcFinalize()); |
| 169 | return 0; | ||
| 170 | } | ||
| 171 | |||
| 172 | /*TEST | ||
| 173 | |||
| 174 | test: | ||
| 175 | suffix: 1 | ||
| 176 | args: -st_type {{shift sinvert}separate output} -st_pc_type jacobi | ||
| 177 | requires: !single | ||
| 178 | |||
| 179 | TEST*/ | ||
| 180 |