Actual source code: ex266.c
1: static char help[] = "Test MatDuplicate() with new nonzeros on the duplicate\n\n";
3: #include <petscmat.h>
4: int main(int argc, char **args)
5: {
6: Mat A, B, C;
7: PetscInt k;
8: const PetscInt M = 18, N = 18;
9: PetscBool equal;
10: PetscScalar *vals;
11: PetscMPIInt rank;
13: // clang-format off
14: // i0/j0[] has a dense diagonal
15: PetscInt i0[] = {7, 7, 8, 8, 9, 16, 17, 9, 10, 1, 1, -2, 2, 3, 3, 14, 4, 5, 10, 13, 9, 9, 10, 1, 0, 0, 5, 5, 6, 6, 13, 13, 14, -14, 4, 4, 5, 11, 11, 12, 15, 15, 16};
16: PetscInt j0[] = {7, 6, 8, 4, 9, 16, 17, 16, 10, 2, 1, 3, 2, 4, 3, 14, 4, 5, 15, 13, 10, 16, 11, 2, 0, 1, 5, -11, 0, 6, 15, 17, 11, 13, 4, 8, 2, 11, 17, 12, 3, 15, 9};
18: // i0/j0[] miss some diagonals
19: PetscInt i1[] = {8, 5, 15, 16, 6, 13, 4, 17, 8, 9, 9, 10, -6, 12, 7, 3, -4, 1, 1, 2, 5, 5, 6, 14, 17, 8, 9, 9, 10, 4, 5, 10, 11, 1, 2};
20: PetscInt j1[] = {2, 3, 16, 9, 5, 17, 1, 13, 4, 10, 16, 11, -5, 12, 1, 7, -1, 2, 7, 3, 6, 11, 0, 11, 13, 4, 10, 16, 11, 8, -2, 15, 12, 7, 3};
22: PetscInt i2[] = {3, 4, 1, 10, 0, 1, 1, 2, 1, 1, 2, 2, 3, 3, 4, 4, 1, 2, 5, 5, 6, 4, 17, 0, 1, 1, 8, 5, 5, 6, 4, 7, 8, 5};
23: PetscInt j2[] = {7, 1, 2, 11, 5, 2, 7, 3, 2, 7, 3, 8, 4, 9, 3, 5, 7, 3, 6, 11, 0, 1, 13, 5, 2, 7, 4, 6, 11, 0, 1, 3, 4, 2};
24: // clang-format on
26: typedef struct {
27: PetscInt *i, *j, n;
28: } coo_data;
30: coo_data coos[3] = {
31: {i0, j0, PETSC_STATIC_ARRAY_LENGTH(i0)},
32: {i1, j1, PETSC_STATIC_ARRAY_LENGTH(i1)},
33: {i2, j2, PETSC_STATIC_ARRAY_LENGTH(i2)}
34: };
35: coo_data mycoo;
37: PetscFunctionBeginUser;
38: PetscCall(PetscInitialize(&argc, &args, NULL, help));
39: PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank));
41: mycoo = coos[rank / 3];
43: PetscCall(MatCreate(PETSC_COMM_WORLD, &A));
44: PetscCall(MatSetSizes(A, PETSC_DECIDE, PETSC_DECIDE, M, N));
45: PetscCall(MatSetFromOptions(A));
47: // Assemble matrix A with the full arrays
48: PetscCall(PetscMalloc1(mycoo.n, &vals));
49: for (k = 0; k < mycoo.n; k++) {
50: vals[k] = mycoo.j[k];
51: PetscCall(MatSetValue(A, mycoo.i[k], mycoo.j[k], vals[k], ADD_VALUES));
52: }
53: PetscCall(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY));
54: PetscCall(MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY));
56: // Assemble matrix B with the 1st half of the arrays
57: PetscCall(MatCreate(PETSC_COMM_WORLD, &B));
58: PetscCall(MatSetSizes(B, PETSC_DECIDE, PETSC_DECIDE, M, N));
59: PetscCall(MatSetFromOptions(B));
60: for (k = 0; k < mycoo.n / 2; k++) PetscCall(MatSetValue(B, mycoo.i[k], mycoo.j[k], vals[k], ADD_VALUES));
61: PetscCall(MatAssemblyBegin(B, MAT_FINAL_ASSEMBLY));
62: PetscCall(MatAssemblyEnd(B, MAT_FINAL_ASSEMBLY));
64: // Duplicate B to C and continue adding nozeros to C with the 2nd half
65: PetscCall(MatDuplicate(B, MAT_COPY_VALUES, &C));
66: for (k = mycoo.n / 2; k < mycoo.n; k++) PetscCall(MatSetValue(C, mycoo.i[k], mycoo.j[k], vals[k], ADD_VALUES));
67: PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY));
68: PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY));
70: // Test if A == C
71: PetscCall(MatMultEqual(A, C, 10, &equal));
72: if (!equal) PetscCall(PetscPrintf(PETSC_COMM_WORLD, "MatDuplicate() on regular matrices failed\n"));
74: PetscCall(PetscFree(vals));
75: PetscCall(MatDestroy(&A));
76: PetscCall(MatDestroy(&B));
77: PetscCall(MatDestroy(&C));
78: PetscCall(PetscFinalize());
79: return 0;
80: }
82: /*TEST
84: test:
85: nsize: 3
86: output_file: output/empty.out
88: TEST*/