| 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 interface to external package PRIMME.\n\n" | ||
| 12 | "This is based on ex3.c. The command line options are:\n" | ||
| 13 | " -n <n>, where <n> = number of grid subdivisions in x dimension.\n" | ||
| 14 | " -m <m>, where <m> = number of grid subdivisions in y dimension.\n\n"; | ||
| 15 | |||
| 16 | #include <slepceps.h> | ||
| 17 | |||
| 18 | 24 | int main(int argc,char **argv) | |
| 19 | { | ||
| 20 | 24 | Mat A; /* matrix */ | |
| 21 | 24 | EPS eps; /* eigenproblem solver context */ | |
| 22 | 24 | ST st; /* spectral transformation context */ | |
| 23 | 24 | KSP ksp; | |
| 24 | 24 | PC pc; | |
| 25 | 24 | PetscInt N,n=35,m,Istart,Iend,II,i,j,bs; | |
| 26 | 24 | PetscBool flag; | |
| 27 | 24 | EPSPRIMMEMethod meth; | |
| 28 | |||
| 29 |
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24 | PetscFunctionBeginUser; |
| 30 |
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24 | PetscCall(SlepcInitialize(&argc,&argv,NULL,help)); |
| 31 | |||
| 32 |
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24 | PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL)); |
| 33 |
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24 | PetscCall(PetscOptionsGetInt(NULL,NULL,"-m",&m,&flag)); |
| 34 |
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24 | if (!flag) m=n; |
| 35 | 24 | N = n*m; | |
| 36 |
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24 | PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\nStandard eigenproblem with PRIMME, N=%" PetscInt_FMT " (%" PetscInt_FMT "x%" PetscInt_FMT " grid)\n\n",N,n,m)); |
| 37 | |||
| 38 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 39 | Compute the matrices that define the eigensystem, Ax=kBx | ||
| 40 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ | ||
| 41 | |||
| 42 |
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24 | PetscCall(MatCreate(PETSC_COMM_WORLD,&A)); |
| 43 |
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24 | PetscCall(MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,N,N)); |
| 44 |
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24 | PetscCall(MatSetFromOptions(A)); |
| 45 | |||
| 46 |
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24 | PetscCall(MatGetOwnershipRange(A,&Istart,&Iend)); |
| 47 |
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22074 | for (II=Istart;II<Iend;II++) { |
| 48 | 22050 | i = II/n; j = II-i*n; | |
| 49 |
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22050 | if (i>0) PetscCall(MatSetValue(A,II,II-n,-1.0,INSERT_VALUES)); |
| 50 |
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22050 | if (i<m-1) PetscCall(MatSetValue(A,II,II+n,-1.0,INSERT_VALUES)); |
| 51 |
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22050 | if (j>0) PetscCall(MatSetValue(A,II,II-1,-1.0,INSERT_VALUES)); |
| 52 |
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22050 | if (j<n-1) PetscCall(MatSetValue(A,II,II+1,-1.0,INSERT_VALUES)); |
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22050 | PetscCall(MatSetValue(A,II,II,4.0,INSERT_VALUES)); |
| 54 | } | ||
| 55 | |||
| 56 |
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24 | PetscCall(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY)); |
| 57 |
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24 | PetscCall(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY)); |
| 58 | |||
| 59 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 60 | Create the eigensolver and set various options | ||
| 61 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ | ||
| 62 | |||
| 63 |
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24 | PetscCall(EPSCreate(PETSC_COMM_WORLD,&eps)); |
| 64 |
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24 | PetscCall(EPSSetOperators(eps,A,NULL)); |
| 65 |
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24 | PetscCall(EPSSetProblemType(eps,EPS_HEP)); |
| 66 |
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24 | PetscCall(EPSSetType(eps,EPSPRIMME)); |
| 67 | |||
| 68 | /* | ||
| 69 | Set several options | ||
| 70 | */ | ||
| 71 |
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24 | PetscCall(EPSSetWhichEigenpairs(eps,EPS_SMALLEST_REAL)); |
| 72 |
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24 | PetscCall(EPSGetST(eps,&st)); |
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24 | PetscCall(STSetType(st,STPRECOND)); |
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24 | PetscCall(STGetKSP(st,&ksp)); |
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24 | PetscCall(KSPGetPC(ksp,&pc)); |
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24 | PetscCall(KSPSetType(ksp,KSPPREONLY)); |
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24 | PetscCall(PCSetType(pc,PCICC)); |
| 78 | |||
| 79 |
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24 | PetscCall(EPSPRIMMESetBlockSize(eps,4)); |
| 80 |
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24 | PetscCall(EPSPRIMMESetMethod(eps,EPS_PRIMME_GD_OLSEN_PLUSK)); |
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24 | PetscCall(EPSSetFromOptions(eps)); |
| 82 | |||
| 83 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 84 | Compute eigenvalues and display info | ||
| 85 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ | ||
| 86 | |||
| 87 |
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24 | PetscCall(EPSSolve(eps)); |
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24 | PetscCall(EPSPRIMMEGetBlockSize(eps,&bs)); |
| 89 |
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24 | PetscCall(EPSPRIMMEGetMethod(eps,&meth)); |
| 90 |
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24 | PetscCall(PetscPrintf(PETSC_COMM_WORLD," PRIMME: using block size %" PetscInt_FMT ", method %s\n",bs,EPSPRIMMEMethods[meth])); |
| 91 | |||
| 92 |
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24 | PetscCall(EPSErrorView(eps,EPS_ERROR_ABSOLUTE,NULL)); |
| 93 | |||
| 94 |
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24 | PetscCall(EPSDestroy(&eps)); |
| 95 |
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24 | PetscCall(MatDestroy(&A)); |
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24 | PetscCall(SlepcFinalize()); |
| 97 | return 0; | ||
| 98 | } | ||
| 99 | |||
| 100 | /*TEST | ||
| 101 | |||
| 102 | build: | ||
| 103 | requires: primme | ||
| 104 | |||
| 105 | testset: | ||
| 106 | args: -eps_nev 4 | ||
| 107 | requires: primme | ||
| 108 | output_file: output/test34_1.out | ||
| 109 | test: | ||
| 110 | suffix: 1 | ||
| 111 | test: | ||
| 112 | suffix: 2 | ||
| 113 | args: -st_pc_type bjacobi -eps_target 0.01 -eps_target_real -eps_refined | ||
| 114 | nsize: 2 | ||
| 115 | test: | ||
| 116 | suffix: 3 | ||
| 117 | args: -eps_smallest_magnitude -eps_harmonic | ||
| 118 | |||
| 119 | TEST*/ | ||
| 120 |