1 static const char help[] = "Tests MatCreateSubMatrix with MatSubMatrix versus MatAIJ, square, shifted (copied from ex97)\n"; 2 3 #include <petscmat.h> 4 5 static PetscErrorCode AssembleMatrix(MPI_Comm comm, Mat *A) { 6 Mat B; 7 PetscInt i, ms, me; 8 9 PetscFunctionBegin; 10 PetscCall(MatCreate(comm, &B)); 11 PetscCall(MatSetSizes(B, 6, 6, PETSC_DETERMINE, PETSC_DETERMINE)); 12 PetscCall(MatSetFromOptions(B)); 13 PetscCall(MatSetUp(B)); 14 PetscCall(MatGetOwnershipRange(B, &ms, &me)); 15 for (i = ms; i < me; i++) { PetscCall(MatSetValue(B, i, i, 1.0 * i, INSERT_VALUES)); } 16 PetscCall(MatSetValue(B, me - 1, me - 1, me * me, INSERT_VALUES)); 17 PetscCall(MatAssemblyBegin(B, MAT_FINAL_ASSEMBLY)); 18 PetscCall(MatAssemblyEnd(B, MAT_FINAL_ASSEMBLY)); 19 *A = B; 20 PetscFunctionReturn(0); 21 } 22 23 static PetscErrorCode Compare2(Vec *X, const char *test) { 24 PetscReal norm; 25 Vec Y; 26 PetscInt verbose = 0; 27 28 PetscFunctionBegin; 29 PetscCall(VecDuplicate(X[0], &Y)); 30 PetscCall(VecCopy(X[0], Y)); 31 PetscCall(VecAYPX(Y, -1.0, X[1])); 32 PetscCall(VecNorm(Y, NORM_INFINITY, &norm)); 33 34 PetscCall(PetscOptionsGetInt(NULL, NULL, "-verbose", &verbose, NULL)); 35 if (norm < PETSC_SQRT_MACHINE_EPSILON && verbose < 1) { 36 PetscCall(PetscPrintf(PETSC_COMM_WORLD, "%30s: norm difference < sqrt(eps_machine)\n", test)); 37 } else { 38 PetscCall(PetscPrintf(PETSC_COMM_WORLD, "%30s: norm difference %g\n", test, (double)norm)); 39 } 40 if (verbose > 1) { 41 PetscCall(VecView(X[0], PETSC_VIEWER_STDOUT_WORLD)); 42 PetscCall(VecView(X[1], PETSC_VIEWER_STDOUT_WORLD)); 43 PetscCall(VecView(Y, PETSC_VIEWER_STDOUT_WORLD)); 44 } 45 PetscCall(VecDestroy(&Y)); 46 PetscFunctionReturn(0); 47 } 48 49 static PetscErrorCode CheckMatrices(Mat A, Mat B, Vec left, Vec right, Vec X, Vec Y, Vec X1, Vec Y1) { 50 Vec *ltmp, *rtmp; 51 52 PetscFunctionBegin; 53 PetscCall(VecDuplicateVecs(right, 2, &rtmp)); 54 PetscCall(VecDuplicateVecs(left, 2, <mp)); 55 PetscCall(MatScale(A, PETSC_PI)); 56 PetscCall(MatScale(B, PETSC_PI)); 57 PetscCall(MatDiagonalScale(A, left, right)); 58 PetscCall(MatDiagonalScale(B, left, right)); 59 PetscCall(MatShift(A, PETSC_PI)); 60 PetscCall(MatShift(B, PETSC_PI)); 61 62 PetscCall(MatMult(A, X, ltmp[0])); 63 PetscCall(MatMult(B, X, ltmp[1])); 64 PetscCall(Compare2(ltmp, "MatMult")); 65 66 PetscCall(MatMultTranspose(A, Y, rtmp[0])); 67 PetscCall(MatMultTranspose(B, Y, rtmp[1])); 68 PetscCall(Compare2(rtmp, "MatMultTranspose")); 69 70 PetscCall(VecCopy(Y1, ltmp[0])); 71 PetscCall(VecCopy(Y1, ltmp[1])); 72 PetscCall(MatMultAdd(A, X, ltmp[0], ltmp[0])); 73 PetscCall(MatMultAdd(B, X, ltmp[1], ltmp[1])); 74 PetscCall(Compare2(ltmp, "MatMultAdd v2==v3")); 75 76 PetscCall(MatMultAdd(A, X, Y1, ltmp[0])); 77 PetscCall(MatMultAdd(B, X, Y1, ltmp[1])); 78 PetscCall(Compare2(ltmp, "MatMultAdd v2!=v3")); 79 80 PetscCall(VecCopy(X1, rtmp[0])); 81 PetscCall(VecCopy(X1, rtmp[1])); 82 PetscCall(MatMultTransposeAdd(A, Y, rtmp[0], rtmp[0])); 83 PetscCall(MatMultTransposeAdd(B, Y, rtmp[1], rtmp[1])); 84 PetscCall(Compare2(rtmp, "MatMultTransposeAdd v2==v3")); 85 86 PetscCall(MatMultTransposeAdd(A, Y, X1, rtmp[0])); 87 PetscCall(MatMultTransposeAdd(B, Y, X1, rtmp[1])); 88 PetscCall(Compare2(rtmp, "MatMultTransposeAdd v2!=v3")); 89 90 PetscCall(VecDestroyVecs(2, <mp)); 91 PetscCall(VecDestroyVecs(2, &rtmp)); 92 PetscFunctionReturn(0); 93 } 94 95 int main(int argc, char *argv[]) { 96 Mat A, B, Asub, Bsub; 97 PetscInt ms, idxrow[3], idxcol[3]; 98 Vec left, right, X, Y, X1, Y1; 99 IS isrow, iscol; 100 PetscBool random = PETSC_TRUE; 101 102 PetscFunctionBeginUser; 103 PetscCall(PetscInitialize(&argc, &argv, NULL, help)); 104 PetscCall(AssembleMatrix(PETSC_COMM_WORLD, &A)); 105 PetscCall(AssembleMatrix(PETSC_COMM_WORLD, &B)); 106 PetscCall(MatSetOperation(B, MATOP_CREATE_SUBMATRIX, NULL)); 107 PetscCall(MatSetOperation(B, MATOP_CREATE_SUBMATRICES, NULL)); 108 PetscCall(MatGetOwnershipRange(A, &ms, NULL)); 109 110 idxrow[0] = ms + 1; 111 idxrow[1] = ms + 2; 112 idxrow[2] = ms + 4; 113 PetscCall(ISCreateGeneral(PETSC_COMM_WORLD, 3, idxrow, PETSC_USE_POINTER, &isrow)); 114 115 idxcol[0] = ms + 1; 116 idxcol[1] = ms + 2; 117 idxcol[2] = ms + 4; 118 PetscCall(ISCreateGeneral(PETSC_COMM_WORLD, 3, idxcol, PETSC_USE_POINTER, &iscol)); 119 120 PetscCall(MatCreateSubMatrix(A, isrow, iscol, MAT_INITIAL_MATRIX, &Asub)); 121 PetscCall(MatCreateSubMatrix(B, isrow, iscol, MAT_INITIAL_MATRIX, &Bsub)); 122 123 PetscCall(MatCreateVecs(Asub, &right, &left)); 124 PetscCall(VecDuplicate(right, &X)); 125 PetscCall(VecDuplicate(right, &X1)); 126 PetscCall(VecDuplicate(left, &Y)); 127 PetscCall(VecDuplicate(left, &Y1)); 128 129 PetscCall(PetscOptionsGetBool(NULL, NULL, "-random", &random, NULL)); 130 if (random) { 131 PetscCall(VecSetRandom(right, NULL)); 132 PetscCall(VecSetRandom(left, NULL)); 133 PetscCall(VecSetRandom(X, NULL)); 134 PetscCall(VecSetRandom(Y, NULL)); 135 PetscCall(VecSetRandom(X1, NULL)); 136 PetscCall(VecSetRandom(Y1, NULL)); 137 } else { 138 PetscCall(VecSet(right, 1.0)); 139 PetscCall(VecSet(left, 2.0)); 140 PetscCall(VecSet(X, 3.0)); 141 PetscCall(VecSet(Y, 4.0)); 142 PetscCall(VecSet(X1, 3.0)); 143 PetscCall(VecSet(Y1, 4.0)); 144 } 145 PetscCall(CheckMatrices(Asub, Bsub, left, right, X, Y, X1, Y1)); 146 PetscCall(ISDestroy(&isrow)); 147 PetscCall(ISDestroy(&iscol)); 148 PetscCall(MatDestroy(&A)); 149 PetscCall(MatDestroy(&B)); 150 PetscCall(MatDestroy(&Asub)); 151 PetscCall(MatDestroy(&Bsub)); 152 PetscCall(VecDestroy(&left)); 153 PetscCall(VecDestroy(&right)); 154 PetscCall(VecDestroy(&X)); 155 PetscCall(VecDestroy(&Y)); 156 PetscCall(VecDestroy(&X1)); 157 PetscCall(VecDestroy(&Y1)); 158 PetscCall(PetscFinalize()); 159 return 0; 160 } 161 162 /*TEST 163 164 test: 165 nsize: 3 166 167 TEST*/ 168