Actual source code: test32.c

slepc-3.17.2 2022-08-09
Report Typos and Errors
  1: /*
  2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
  4:    Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain

  6:    This file is part of SLEPc.
  7:    SLEPc is distributed under a 2-clause BSD license (see LICENSE).
  8:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  9: */

 11: static char help[] = "Tests a GHEP problem with symmetric matrices.\n\n";

 13: #include <slepceps.h>

 15: int main(int argc,char **argv)
 16: {
 17:   Mat            A,B;        /* matrices */
 18:   EPS            eps;        /* eigenproblem solver context */
 19:   ST             st;
 20:   KSP            ksp;
 21:   PC             pc;
 22:   PCType         pctype;
 23:   PetscInt       N,n=45,m,Istart,Iend,II,i,j;
 24:   PetscBool      flag;

 26:   SlepcInitialize(&argc,&argv,(char*)0,help);
 27:   PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);
 28:   PetscOptionsGetInt(NULL,NULL,"-m",&m,&flag);
 29:   if (!flag) m=n;
 30:   N = n*m;
 31:   PetscPrintf(PETSC_COMM_WORLD,"\nGeneralized Symmetric Eigenproblem, N=%" PetscInt_FMT " (%" PetscInt_FMT "x%" PetscInt_FMT " grid)\n\n",N,n,m);

 33:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 34:      Compute the matrices that define the eigensystem, Ax=kBx
 35:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

 37:   MatCreate(PETSC_COMM_WORLD,&A);
 38:   MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,N,N);
 39:   MatSetFromOptions(A);
 40:   MatSetUp(A);

 42:   MatCreate(PETSC_COMM_WORLD,&B);
 43:   MatSetSizes(B,PETSC_DECIDE,PETSC_DECIDE,N,N);
 44:   MatSetFromOptions(B);
 45:   MatSetUp(B);

 47:   MatGetOwnershipRange(A,&Istart,&Iend);
 48:   for (II=Istart;II<Iend;II++) {
 49:     i = II/n; j = II-i*n;
 50:     if (i>0) MatSetValue(A,II,II-n,-1.0,INSERT_VALUES);
 51:     if (i<m-1) MatSetValue(A,II,II+n,-1.0,INSERT_VALUES);
 52:     if (j>0) MatSetValue(A,II,II-1,-1.0,INSERT_VALUES);
 53:     if (j<n-1) MatSetValue(A,II,II+1,-1.0,INSERT_VALUES);
 54:     MatSetValue(A,II,II,4.0,INSERT_VALUES);
 55:     MatSetValue(B,II,II,2.0/PetscLogScalar(II+2),INSERT_VALUES);
 56:   }
 57:   MatSetValue(B,0,1,0.4,INSERT_VALUES);
 58:   MatSetValue(B,1,0,0.4,INSERT_VALUES);

 60:   MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
 61:   MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);
 62:   MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY);
 63:   MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY);

 65:   MatSetOption(A,MAT_SYMMETRIC,PETSC_TRUE);
 66:   MatSetOption(A,MAT_HERMITIAN,PETSC_TRUE);
 67:   MatSetOption(B,MAT_SYMMETRIC,PETSC_TRUE);
 68:   MatSetOption(B,MAT_HERMITIAN,PETSC_TRUE);

 70:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 71:                 Create the eigensolver and solve the problem
 72:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

 74:   EPSCreate(PETSC_COMM_WORLD,&eps);
 75:   EPSSetOperators(eps,A,B);
 76:   EPSSetProblemType(eps,EPS_GHEP);
 77:   EPSSetFromOptions(eps);
 78:   EPSSetUp(eps);
 79:   EPSGetST(eps,&st);
 80:   STGetKSP(st,&ksp);
 81:   KSPGetPC(ksp,&pc);
 82:   PCGetType(pc,&pctype);
 83:   PetscPrintf(PETSC_COMM_WORLD," Using %s for the PC\n",pctype);
 84:   EPSSolve(eps);
 85:   EPSErrorView(eps,EPS_ERROR_BACKWARD,NULL);

 87:   EPSDestroy(&eps);
 88:   MatDestroy(&A);
 89:   MatDestroy(&B);
 90:   SlepcFinalize();
 91:   return 0;
 92: }

 94: /*TEST

 96:    test:
 97:       suffix: 1
 98:       args: -n 18 -eps_nev 3 -st_type sinvert -eps_target 1.02

100:    test:
101:       suffix: 2
102:       args: -n 18 -eps_type ciss -rg_interval_endpoints 1.0,1.2
103:       requires: !single

105:    testset:
106:       nsize: {{1 4}}
107:       args: -n 8 -eps_nev 60 -st_pc_type redundant
108:       filter: grep -v Using
109:       requires: !single
110:       output_file: output/test32_3.out
111:       test:
112:          suffix: 3
113:       test:
114:          suffix: 3_gnhep
115:          args: -eps_gen_non_hermitian

117:    testset:
118:       nsize: {{1 4}}
119:       args: -n 8 -eps_nev 64 -st_pc_type redundant
120:       filter: grep -v Using
121:       requires: !single
122:       output_file: output/test32_4.out
123:       test:
124:          suffix: 4
125:       test:
126:          suffix: 4_gnhep
127:          args: -eps_gen_non_hermitian

129:    testset:
130:       requires: !single
131:       args: -eps_tol 1e-10 -st_type sinvert -st_ksp_type preonly -st_pc_type cholesky -eps_interval .8,1.1 -eps_krylovschur_partitions 2
132:       output_file: output/test32_5.out
133:       nsize: 3
134:       filter: grep -v Using
135:       test:
136:          suffix: 5_redundant
137:          args: -st_pc_type redundant -st_redundant_pc_type cholesky
138:       test:
139:          suffix: 5_mumps
140:          requires: mumps !complex
141:          args: -st_pc_factor_mat_solver_type mumps -st_mat_mumps_icntl_13 1
142:       test:
143:          suffix: 5_superlu
144:          requires: superlu_dist
145:          args: -st_pc_factor_mat_solver_type superlu_dist -st_mat_superlu_dist_rowperm NOROWPERM
146:          timeoutfactor: 10

148: TEST*/