Actual source code: ex251.c
1: static char help[] = "Test MatAXPY \n\n";
3: #include <petscmat.h>
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;
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};
19: PetscInt Annz = sizeof(Ai)/sizeof(PetscInt);
20: PetscInt Bnnz = sizeof(Bi)/sizeof(PetscInt);
22: PetscInitialize(&argc,&args,(char*)0,help);
23: MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
25: MatCreate(PETSC_COMM_WORLD,&A);
26: MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,M,N);
27: MatSetFromOptions(A);
28: MatSeqAIJSetPreallocation(A,2,NULL);
29: MatMPIAIJSetPreallocation(A,2,NULL,2,NULL);
30: MatSetOption(A,MAT_NEW_NONZERO_ALLOCATION_ERR,PETSC_FALSE);
32: if (rank == 0) {
33: for (k=0; k<Annz; k++) MatSetValue(A,Ai[k],Aj[k],Ai[k]+Aj[k]+1.0,INSERT_VALUES);
34: }
36: MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
37: MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);
39: MatCreate(PETSC_COMM_WORLD,&B);
40: MatSetSizes(B,PETSC_DECIDE,PETSC_DECIDE,M,N);
41: MatSetFromOptions(B);
42: MatSeqAIJSetPreallocation(B,2,NULL);
43: MatMPIAIJSetPreallocation(B,2,NULL,2,NULL);
44: MatSetOption(B,MAT_NEW_NONZERO_ALLOCATION_ERR,PETSC_FALSE);
46: if (rank == 0) {
47: for (k=0; k<Bnnz; k++) MatSetValue(B,Bi[k],Bj[k],Bi[k]+Bj[k]+2.0,INSERT_VALUES);
48: }
49: MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY);
50: MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY);
52: MatAXPY(A,1.0,B,SUBSET_NONZERO_PATTERN); /* A += B */
53: MatView(A,PETSC_VIEWER_STDOUT_WORLD);
55: /* Blow up B so it will have the same nonzero pattern as A */
56: MatAXPY(B,5,A,DIFFERENT_NONZERO_PATTERN); /* B += 5A */
57: MatView(B,PETSC_VIEWER_STDOUT_WORLD);
59: MatAXPY(A,3,B,SAME_NONZERO_PATTERN); /* A += 7B */
60: MatView(A,PETSC_VIEWER_STDOUT_WORLD);
62: MatDestroy(&A);
63: MatDestroy(&B);
65: PetscFinalize();
66: return 0;
67: }
69: /*TEST
70: testset:
71: nsize: {{1 2}}
72: filter: grep -ve type -ve "Mat Object"
73: output_file: output/ex251_1.out
75: test:
76: suffix: 1
77: args: -mat_type aij
79: test:
80: suffix: cuda
81: requires: cuda
82: args: -mat_type aijcusparse
84: test:
85: suffix: kok
86: requires: kokkos_kernels
87: args: -mat_type aijkokkos
89: TEST*/