1 static char help[] = "Testing PtAP for SeqMAIJ matrix, P, with SeqAIJ matrix, A.\n\n"; 2 3 #include <petscmat.h> 4 5 int main(int argc, char **argv) { 6 Mat pA, P, aijP; 7 PetscScalar pa[] = {1., -1., 0., 0., 1., -1., 0., 0., 1.}; 8 PetscInt i, pij[] = {0, 1, 2}; 9 PetscInt aij[3][3] = { 10 {0, 1, 2}, 11 {3, 4, 5}, 12 {6, 7, 8} 13 }; 14 Mat A, mC, C; 15 PetscScalar one = 1.; 16 PetscMPIInt size; 17 PetscBool flg; 18 19 PetscFunctionBeginUser; 20 PetscCall(PetscInitialize(&argc, &argv, (char *)0, help)); 21 PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size)); 22 PetscCheck(size == 1, PETSC_COMM_WORLD, PETSC_ERR_WRONG_MPI_SIZE, "This is a uniprocessor example only!"); 23 24 /* Create MAIJ matrix, P */ 25 PetscCall(MatCreate(PETSC_COMM_SELF, &pA)); 26 PetscCall(MatSetSizes(pA, 3, 3, 3, 3)); 27 PetscCall(MatSetType(pA, MATSEQAIJ)); 28 PetscCall(MatSetUp(pA)); 29 PetscCall(MatSetOption(pA, MAT_IGNORE_ZERO_ENTRIES, PETSC_TRUE)); 30 PetscCall(MatSetValues(pA, 3, pij, 3, pij, pa, ADD_VALUES)); 31 PetscCall(MatAssemblyBegin(pA, MAT_FINAL_ASSEMBLY)); 32 PetscCall(MatAssemblyEnd(pA, MAT_FINAL_ASSEMBLY)); 33 PetscCall(MatCreateMAIJ(pA, 3, &P)); 34 PetscCall(MatDestroy(&pA)); 35 36 /* Create AIJ equivalent matrix, aijP, for comparison testing */ 37 PetscCall(MatConvert(P, MATSEQAIJ, MAT_INITIAL_MATRIX, &aijP)); 38 39 /* Create AIJ matrix A */ 40 PetscCall(MatCreate(PETSC_COMM_SELF, &A)); 41 PetscCall(MatSetSizes(A, 9, 9, 9, 9)); 42 PetscCall(MatSetType(A, MATSEQAIJ)); 43 PetscCall(MatSetUp(A)); 44 PetscCall(MatSetOption(A, MAT_IGNORE_ZERO_ENTRIES, PETSC_TRUE)); 45 PetscCall(MatSetValues(A, 3, aij[0], 3, aij[0], pa, ADD_VALUES)); 46 PetscCall(MatSetValues(A, 3, aij[1], 3, aij[1], pa, ADD_VALUES)); 47 PetscCall(MatSetValues(A, 3, aij[2], 3, aij[2], pa, ADD_VALUES)); 48 for (i = 0; i < 9; i++) { PetscCall(MatSetValue(A, i, i, one, ADD_VALUES)); } 49 PetscCall(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY)); 50 PetscCall(MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY)); 51 52 /* Perform PtAP_SeqAIJ_SeqAIJ for comparison testing */ 53 PetscCall(MatPtAP(A, aijP, MAT_INITIAL_MATRIX, 1., &C)); 54 55 /* Perform PtAP_SeqAIJ_SeqMAIJ */ 56 /* Developer API */ 57 PetscCall(MatProductCreate(A, P, NULL, &mC)); 58 PetscCall(MatProductSetType(mC, MATPRODUCT_PtAP)); 59 PetscCall(MatProductSetAlgorithm(mC, "default")); 60 PetscCall(MatProductSetFill(mC, PETSC_DEFAULT)); 61 PetscCall(MatProductSetFromOptions(mC)); 62 PetscCall(MatProductSymbolic(mC)); 63 PetscCall(MatProductNumeric(mC)); 64 PetscCall(MatProductNumeric(mC)); 65 66 /* Check mC = C */ 67 PetscCall(MatEqual(C, mC, &flg)); 68 PetscCheck(flg, PETSC_COMM_SELF, PETSC_ERR_ARG_INCOMP, "MatProduct C != mC"); 69 PetscCall(MatDestroy(&mC)); 70 71 /* User API */ 72 PetscCall(MatPtAP(A, P, MAT_INITIAL_MATRIX, 1., &mC)); 73 PetscCall(MatPtAP(A, P, MAT_REUSE_MATRIX, 1., &mC)); 74 75 /* Check mC = C */ 76 PetscCall(MatEqual(C, mC, &flg)); 77 PetscCheck(flg, PETSC_COMM_SELF, PETSC_ERR_ARG_INCOMP, "MatPtAP C != mC"); 78 PetscCall(MatDestroy(&mC)); 79 80 /* Cleanup */ 81 PetscCall(MatDestroy(&P)); 82 PetscCall(MatDestroy(&aijP)); 83 PetscCall(MatDestroy(&A)); 84 PetscCall(MatDestroy(&C)); 85 PetscCall(PetscFinalize()); 86 return 0; 87 } 88 89 /*TEST 90 91 test: 92 output_file: output/ex101.out 93 94 TEST*/ 95