Actual source code: test5.c

slepc-3.21.1 2024-04-26
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  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[] = "Test various ST interface functions.\n\n";

 13: #include <slepceps.h>

 15: int main (int argc,char **argv)
 16: {
 17:   ST             st;
 18:   KSP            ksp;
 19:   PC             pc;
 20:   Mat            A,mat[1],Op;
 21:   Vec            v,w;
 22:   PetscInt       N,n=4,i,j,II,Istart,Iend;
 23:   PetscScalar    d,val1,val2;
 24:   PetscBool      test_compl=PETSC_FALSE;

 26:   PetscFunctionBeginUser;
 27:   PetscCall(SlepcInitialize(&argc,&argv,(char*)0,help));
 28:   PetscCall(PetscOptionsGetBool(NULL,NULL,"-complex",&test_compl,NULL));
 29:   PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
 30:   N = n*n;

 32:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 33:      Create non-symmetric matrix
 34:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

 36:   PetscCall(MatCreate(PETSC_COMM_WORLD,&A));
 37:   PetscCall(MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,N,N));
 38:   PetscCall(MatSetFromOptions(A));

 40:   PetscCall(MatGetOwnershipRange(A,&Istart,&Iend));
 41: #if defined(PETSC_USE_COMPLEX)
 42:   val1 = test_compl? PetscCMPLX(1.0,-0.2): 1.0;
 43:   val2 = test_compl? PetscCMPLX(-1.0,0.4): -1.0;
 44: #else
 45:   val1 = 1.0;
 46:   val2 = -1.0;
 47: #endif
 48:   for (II=Istart;II<Iend;II++) {
 49:     i = II/n; j = II-i*n;
 50:     d = 0.0;
 51:     if (i>0) { PetscCall(MatSetValue(A,II,II-n,val1,INSERT_VALUES)); d=d+1.0; }
 52:     if (i<n-1) { PetscCall(MatSetValue(A,II,II+n,val2,INSERT_VALUES)); d=d+1.0; }
 53:     if (j>0) { PetscCall(MatSetValue(A,II,II-1,val1,INSERT_VALUES)); d=d+1.0; }
 54:     if (j<n-1) { PetscCall(MatSetValue(A,II,II+1,val2,INSERT_VALUES)); d=d+1.0; }
 55:     PetscCall(MatSetValue(A,II,II,d,INSERT_VALUES));
 56:   }
 57:   PetscCall(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY));
 58:   PetscCall(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY));

 60: #if defined(PETSC_USE_COMPLEX)
 61:   val1 = test_compl? PetscCMPLX(-0.5,0.01): -0.5;
 62: #else
 63:   val1 = -0.5;
 64: #endif
 65:   PetscCall(MatCreateVecs(A,&v,&w));
 66:   PetscCall(VecSetValue(v,0,val1,INSERT_VALUES));
 67:   PetscCall(VecSetValue(v,1,1.5,INSERT_VALUES));
 68:   PetscCall(VecSetValue(v,2,2,INSERT_VALUES));
 69:   PetscCall(VecAssemblyBegin(v));
 70:   PetscCall(VecAssemblyEnd(v));
 71:   PetscCall(VecView(v,NULL));

 73:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 74:      Create the spectral transformation object
 75:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 76:   PetscCall(STCreate(PETSC_COMM_WORLD,&st));
 77:   mat[0] = A;
 78:   PetscCall(STSetMatrices(st,1,mat));
 79:   PetscCall(STSetType(st,STCAYLEY));
 80:   PetscCall(STSetShift(st,2.0));
 81:   PetscCall(STCayleySetAntishift(st,1.0));
 82:   PetscCall(STSetTransform(st,PETSC_TRUE));

 84:   PetscCall(KSPCreate(PETSC_COMM_WORLD,&ksp));
 85:   PetscCall(KSPSetType(ksp,KSPPREONLY));
 86:   PetscCall(KSPGetPC(ksp,&pc));
 87:   PetscCall(PCSetType(pc,PCLU));
 88:   PetscCall(KSPSetTolerances(ksp,100*PETSC_MACHINE_EPSILON,PETSC_DEFAULT,PETSC_DEFAULT,PETSC_DEFAULT));
 89:   PetscCall(KSPSetFromOptions(ksp));
 90:   PetscCall(STSetKSP(st,ksp));
 91:   PetscCall(KSPDestroy(&ksp));

 93:   PetscCall(STSetFromOptions(st));

 95:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 96:      Apply the operator
 97:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 98:   PetscCall(STApply(st,v,w));
 99:   PetscCall(VecView(w,NULL));

101:   PetscCall(STApplyTranspose(st,v,w));
102:   PetscCall(VecView(w,NULL));

104:   if (test_compl) {
105:     PetscCall(STApplyHermitianTranspose(st,v,w));
106:     PetscCall(VecView(w,NULL));
107:   }

109:   PetscCall(STMatMult(st,1,v,w));
110:   PetscCall(VecView(w,NULL));

112:   PetscCall(STMatMultTranspose(st,1,v,w));
113:   PetscCall(VecView(w,NULL));

115:   if (test_compl) {
116:     PetscCall(STMatMultHermitianTranspose(st,1,v,w));
117:     PetscCall(VecView(w,NULL));
118:   }

120:   PetscCall(STMatSolve(st,v,w));
121:   PetscCall(VecView(w,NULL));

123:   PetscCall(STMatSolveTranspose(st,v,w));
124:   PetscCall(VecView(w,NULL));

126:   if (test_compl) {
127:     PetscCall(STMatSolveHermitianTranspose(st,v,w));
128:     PetscCall(VecView(w,NULL));
129:   }

131:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
132:      Get the operator matrix
133:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
134:   PetscCall(STGetOperator(st,&Op));
135:   PetscCall(MatMult(Op,v,w));
136:   PetscCall(VecView(w,NULL));
137:   PetscCall(MatMultTranspose(Op,v,w));
138:   PetscCall(VecView(w,NULL));
139:   if (test_compl) {
140:     PetscCall(MatMultHermitianTranspose(Op,v,w));
141:     PetscCall(VecView(w,NULL));
142:   }
143:   PetscCall(STRestoreOperator(st,&Op));

145:   PetscCall(STDestroy(&st));
146:   PetscCall(MatDestroy(&A));
147:   PetscCall(VecDestroy(&v));
148:   PetscCall(VecDestroy(&w));
149:   PetscCall(SlepcFinalize());
150:   return 0;
151: }

153: /*TEST

155:    testset:
156:       output_file: output/test5_1.out
157:       requires: !single
158:       test:
159:          suffix: 1
160:          args: -st_matmode {{copy inplace}}
161:       test:
162:          suffix: 1_shell
163:          args: -st_matmode shell -ksp_type bcgs -pc_type jacobi

165:    testset:
166:       output_file: output/test5_2.out
167:       requires: complex !single
168:       args: -complex
169:       test:
170:          suffix: 2
171:          args: -st_matmode {{copy inplace}}
172:       test:
173:          suffix: 2_shell
174:          args: -st_matmode shell -ksp_type bcgs -pc_type jacobi

176: TEST*/