Actual source code: ex98.c
2: static char help[] = "Tests MatMPIAIJSetPreallocationCSR()\n\n";
4: /*T
5: Concepts: partitioning
6: Processors: 4
7: T*/
9: /*
10: Include "petscmat.h" so that we can use matrices. Note that this file
11: automatically includes:
12: petscsys.h - base PETSc routines petscvec.h - vectors
13: petscmat.h - matrices
14: petscis.h - index sets
15: petscviewer.h - viewers
16: */
17: #include <petscmat.h>
19: int main(int argc,char **args)
20: {
21: Mat A;
22: PetscInt *ia,*ja;
23: PetscMPIInt rank,size;
25: PetscInitialize(&argc,&args,(char*)0,help);
26: MPI_Comm_size(PETSC_COMM_WORLD,&size);
28: MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
30: PetscMalloc1(5,&ia);
31: PetscMalloc1(16,&ja);
32: if (rank == 0) {
33: ja[0] = 1; ja[1] = 4; ja[2] = 0; ja[3] = 2; ja[4] = 5; ja[5] = 1; ja[6] = 3; ja[7] = 6;
34: ja[8] = 2; ja[9] = 7;
35: ia[0] = 0; ia[1] = 2; ia[2] = 5; ia[3] = 8; ia[4] = 10;
36: } else if (rank == 1) {
37: ja[0] = 0; ja[1] = 5; ja[2] = 8; ja[3] = 1; ja[4] = 4; ja[5] = 6; ja[6] = 9; ja[7] = 2;
38: ja[8] = 5; ja[9] = 7; ja[10] = 10; ja[11] = 3; ja[12] = 6; ja[13] = 11;
39: ia[0] = 0; ia[1] = 3; ia[2] = 7; ia[3] = 11; ia[4] = 14;
40: } else if (rank == 2) {
41: ja[0] = 4; ja[1] = 9; ja[2] = 12; ja[3] = 5; ja[4] = 8; ja[5] = 10; ja[6] = 13; ja[7] = 6;
42: ja[8] = 9; ja[9] = 11; ja[10] = 14; ja[11] = 7; ja[12] = 10; ja[13] = 15;
43: ia[0] = 0; ia[1] = 3; ia[2] = 7; ia[3] = 11; ia[4] = 14;
44: } else {
45: ja[0] = 8; ja[1] = 13; ja[2] = 9; ja[3] = 12; ja[4] = 14; ja[5] = 10; ja[6] = 13; ja[7] = 15;
46: ja[8] = 11; ja[9] = 14;
47: ia[0] = 0; ia[1] = 2; ia[2] = 5; ia[3] = 8; ia[4] = 10;
48: }
50: MatCreate(PETSC_COMM_WORLD,&A);
51: MatSetSizes(A,4,4,16,16);
52: MatSetType(A,MATMPIAIJ);
53: MatMPIAIJSetPreallocationCSR(A,ia,ja,NULL);
54: PetscFree(ia);
55: PetscFree(ja);
56: MatView(A,PETSC_VIEWER_STDOUT_WORLD);
57: MatDestroy(&A);
58: PetscFinalize();
59: return 0;
60: }
62: /*TEST
64: test:
65: nsize: 4
67: TEST*/