| 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 EPSSetArbitrarySelection.\n\n"; | ||
| 12 | |||
| 13 | #include <slepceps.h> | ||
| 14 | |||
| 15 | 144732 | PetscErrorCode MyArbitrarySelection(PetscScalar eigr,PetscScalar eigi,Vec xr,Vec xi,PetscScalar *rr,PetscScalar *ri,void *ctx) | |
| 16 | { | ||
| 17 | 144732 | Vec xref = *(Vec*)ctx; | |
| 18 | |||
| 19 |
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144732 | PetscFunctionBeginUser; |
| 20 |
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144732 | PetscCall(VecDot(xr,xref,rr)); |
| 21 | 144732 | *rr = PetscAbsScalar(*rr); | |
| 22 |
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144732 | if (ri) *ri = 0.0; |
| 23 |
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29972 | PetscFunctionReturn(PETSC_SUCCESS); |
| 24 | } | ||
| 25 | |||
| 26 | 80 | int main(int argc,char **argv) | |
| 27 | { | ||
| 28 | 80 | Mat A; /* problem matrices */ | |
| 29 | 80 | EPS eps; /* eigenproblem solver context */ | |
| 30 | 80 | PetscScalar seigr,seigi; | |
| 31 | 80 | PetscReal tol=1000*PETSC_MACHINE_EPSILON; | |
| 32 | 80 | Vec sxr,sxi; | |
| 33 | 80 | PetscInt n=30,i,Istart,Iend,nconv; | |
| 34 | |||
| 35 |
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80 | PetscFunctionBeginUser; |
| 36 |
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80 | PetscCall(SlepcInitialize(&argc,&argv,NULL,help)); |
| 37 | |||
| 38 |
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80 | PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL)); |
| 39 |
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80 | PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\nTridiagonal with zero diagonal, n=%" PetscInt_FMT "\n\n",n)); |
| 40 | |||
| 41 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 42 | Create matrix tridiag([-1 0 -1]) | ||
| 43 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ | ||
| 44 |
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80 | PetscCall(MatCreate(PETSC_COMM_WORLD,&A)); |
| 45 |
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80 | PetscCall(MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,n,n)); |
| 46 |
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80 | PetscCall(MatSetFromOptions(A)); |
| 47 | |||
| 48 |
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80 | PetscCall(MatGetOwnershipRange(A,&Istart,&Iend)); |
| 49 |
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2480 | for (i=Istart;i<Iend;i++) { |
| 50 |
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2400 | if (i>0) PetscCall(MatSetValue(A,i,i-1,-1.0,INSERT_VALUES)); |
| 51 |
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2400 | if (i<n-1) PetscCall(MatSetValue(A,i,i+1,-1.0,INSERT_VALUES)); |
| 52 | } | ||
| 53 |
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80 | PetscCall(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY)); |
| 54 |
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80 | PetscCall(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY)); |
| 55 | |||
| 56 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 57 | Create the eigensolver | ||
| 58 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ | ||
| 59 |
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80 | PetscCall(EPSCreate(PETSC_COMM_WORLD,&eps)); |
| 60 |
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80 | PetscCall(EPSSetProblemType(eps,EPS_HEP)); |
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80 | PetscCall(EPSSetTolerances(eps,tol,PETSC_CURRENT)); |
| 62 |
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80 | PetscCall(EPSSetOperators(eps,A,NULL)); |
| 63 |
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80 | PetscCall(EPSSetWhichEigenpairs(eps,EPS_SMALLEST_REAL)); |
| 64 |
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80 | PetscCall(EPSSetFromOptions(eps)); |
| 65 | |||
| 66 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 67 | Solve eigenproblem and store some solution | ||
| 68 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ | ||
| 69 |
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80 | PetscCall(EPSSolve(eps)); |
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80 | PetscCall(MatCreateVecs(A,&sxr,NULL)); |
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80 | PetscCall(MatCreateVecs(A,&sxi,NULL)); |
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80 | PetscCall(EPSGetConverged(eps,&nconv)); |
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80 | if (nconv>0) { |
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80 | PetscCall(EPSGetEigenpair(eps,0,&seigr,&seigi,sxr,sxi)); |
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80 | PetscCall(EPSErrorView(eps,EPS_ERROR_RELATIVE,NULL)); |
| 76 | |||
| 77 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 78 | Solve eigenproblem using an arbitrary selection | ||
| 79 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ | ||
| 80 |
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80 | PetscCall(EPSSetArbitrarySelection(eps,MyArbitrarySelection,&sxr)); |
| 81 |
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80 | PetscCall(EPSSetWhichEigenpairs(eps,EPS_LARGEST_MAGNITUDE)); |
| 82 |
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80 | PetscCall(EPSSolve(eps)); |
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80 | PetscCall(EPSErrorView(eps,EPS_ERROR_RELATIVE,NULL)); |
| 84 | ✗ | } else PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Problem: no eigenpairs converged.\n")); | |
| 85 | |||
| 86 |
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80 | PetscCall(EPSDestroy(&eps)); |
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80 | PetscCall(VecDestroy(&sxr)); |
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80 | PetscCall(VecDestroy(&sxi)); |
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80 | PetscCall(MatDestroy(&A)); |
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80 | PetscCall(SlepcFinalize()); |
| 91 | return 0; | ||
| 92 | } | ||
| 93 | |||
| 94 | /*TEST | ||
| 95 | |||
| 96 | testset: | ||
| 97 | args: -eps_max_it 5000 -st_pc_type jacobi | ||
| 98 | output_file: output/test13_1.out | ||
| 99 | filter: sed -e "s/-1.98975/-1.98974/" | ||
| 100 | test: | ||
| 101 | suffix: 1 | ||
| 102 | args: -eps_type {{krylovschur gd}} | ||
| 103 | test: | ||
| 104 | suffix: 1_jd | ||
| 105 | args: -eps_type jd -st_ksp_type gmres | ||
| 106 | test: | ||
| 107 | suffix: 1_gd2 | ||
| 108 | args: -eps_type gd -eps_gd_double_expansion | ||
| 109 | test: | ||
| 110 | suffix: 2 | ||
| 111 | args: -eps_non_hermitian -eps_type {{krylovschur gd jd}} | ||
| 112 | test: | ||
| 113 | suffix: 2_gd2 | ||
| 114 | args: -eps_non_hermitian -eps_type gd -eps_gd_double_expansion | ||
| 115 | timeoutfactor: 2 | ||
| 116 | |||
| 117 | TEST*/ | ||
| 118 |