1 static char help[] = "Test MatAXPY \n\n";
2
3 #include <petscmat.h>
main(int argc,char ** args)4 int main(int argc, char **args)
5 {
6 Mat A = NULL, B = NULL;
7 PetscInt k;
8 const PetscInt M = 18, N = 18;
9 PetscMPIInt rank;
10
11 /* A, B are 18 x 18 nonsymmetric matrices. Initially, B's nonzero pattern is a subset of A.
12 Big enough to have complex communication patterns but still small enough for debugging.
13 */
14 PetscInt Ai[] = {0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17};
15 PetscInt Aj[] = {0, 1, 2, 7, 3, 8, 4, 9, 5, 8, 2, 6, 11, 0, 7, 1, 6, 2, 4, 10, 16, 11, 15, 12, 17, 12, 13, 14, 15, 17, 11, 13, 3, 16, 9, 15, 11, 13};
16 PetscInt Bi[] = {0, 0, 1, 1, 2, 2, 4, 4, 5, 5, 5, 6, 7, 7, 8, 8, 9, 9, 10, 10, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17};
17 PetscInt Bj[] = {0, 1, 2, 7, 3, 8, 5, 8, 2, 6, 11, 0, 1, 6, 2, 4, 10, 16, 11, 15, 12, 13, 14, 17, 11, 13, 3, 16, 9, 15, 11, 13};
18
19 PetscInt Annz = PETSC_STATIC_ARRAY_LENGTH(Ai);
20 PetscInt Bnnz = PETSC_STATIC_ARRAY_LENGTH(Bi);
21
22 PetscFunctionBeginUser;
23 PetscCall(PetscInitialize(&argc, &args, NULL, help));
24 PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank));
25
26 PetscCall(MatCreate(PETSC_COMM_WORLD, &A));
27 PetscCall(MatSetSizes(A, PETSC_DECIDE, PETSC_DECIDE, M, N));
28 PetscCall(MatSetFromOptions(A));
29 PetscCall(MatSeqAIJSetPreallocation(A, 2, NULL));
30 PetscCall(MatMPIAIJSetPreallocation(A, 2, NULL, 2, NULL));
31 PetscCall(MatSetOption(A, MAT_NEW_NONZERO_ALLOCATION_ERR, PETSC_FALSE));
32
33 if (rank == 0) {
34 for (k = 0; k < Annz; k++) PetscCall(MatSetValue(A, Ai[k], Aj[k], Ai[k] + Aj[k] + 1.0, INSERT_VALUES));
35 }
36
37 PetscCall(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY));
38 PetscCall(MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY));
39
40 PetscCall(MatCreate(PETSC_COMM_WORLD, &B));
41 PetscCall(MatSetSizes(B, PETSC_DECIDE, PETSC_DECIDE, M, N));
42 PetscCall(MatSetFromOptions(B));
43 PetscCall(MatSeqAIJSetPreallocation(B, 2, NULL));
44 PetscCall(MatMPIAIJSetPreallocation(B, 2, NULL, 2, NULL));
45 PetscCall(MatSetOption(B, MAT_NEW_NONZERO_ALLOCATION_ERR, PETSC_FALSE));
46
47 if (rank == 0) {
48 for (k = 0; k < Bnnz; k++) PetscCall(MatSetValue(B, Bi[k], Bj[k], Bi[k] + Bj[k] + 2.0, INSERT_VALUES));
49 }
50 PetscCall(MatAssemblyBegin(B, MAT_FINAL_ASSEMBLY));
51 PetscCall(MatAssemblyEnd(B, MAT_FINAL_ASSEMBLY));
52
53 PetscCall(MatAXPY(A, 1.0, B, SUBSET_NONZERO_PATTERN)); /* A += B */
54 PetscCall(MatView(A, PETSC_VIEWER_STDOUT_WORLD));
55
56 /* Blow up B so it will have the same nonzero pattern as A */
57 PetscCall(MatAXPY(B, 5, A, DIFFERENT_NONZERO_PATTERN)); /* B += 5A */
58 PetscCall(MatView(B, PETSC_VIEWER_STDOUT_WORLD));
59
60 PetscCall(MatAXPY(A, 3, B, SAME_NONZERO_PATTERN)); /* A += 7B */
61 PetscCall(MatView(A, PETSC_VIEWER_STDOUT_WORLD));
62
63 PetscCall(MatDestroy(&A));
64 PetscCall(MatDestroy(&B));
65
66 PetscCall(PetscFinalize());
67 return 0;
68 }
69
70 /*TEST
71 testset:
72 nsize: {{1 2}}
73 filter: grep -ve type -ve "Mat Object"
74 output_file: output/ex251_1.out
75
76 test:
77 suffix: 1
78 args: -mat_type aij
79
80 test:
81 suffix: cuda
82 requires: cuda
83 args: -mat_type aijcusparse
84
85 test:
86 suffix: kok
87 requires: kokkos_kernels
88 args: -mat_type aijkokkos
89
90 TEST*/
91