Actual source code: ex7.c
2: static char help[] = "Demonstrates constructing an application ordering.\n\n";
4: #include <petscao.h>
5: #include <petscviewer.h>
7: int main(int argc,char **argv)
8: {
9: PetscInt n = 5;
10: PetscMPIInt rank,size;
11: IS ispetsc,isapp;
12: AO ao;
14: PetscInitialize(&argc,&argv,(char*)0,help);
15: PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);
16: MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
17: MPI_Comm_size(PETSC_COMM_WORLD,&size);
19: /* create the index sets */
20: ISCreateStride(PETSC_COMM_WORLD,n,rank,size,&ispetsc);
21: ISCreateStride(PETSC_COMM_WORLD,n,n*rank,1,&isapp);
23: /* create the application ordering */
24: AOCreateBasicIS(isapp,ispetsc,&ao);
26: AOView(ao,PETSC_VIEWER_STDOUT_WORLD);
28: ISView(ispetsc,PETSC_VIEWER_STDOUT_WORLD);
29: ISView(isapp,PETSC_VIEWER_STDOUT_WORLD);
30: AOPetscToApplicationIS(ao,ispetsc);
31: ISView(isapp,PETSC_VIEWER_STDOUT_WORLD);
32: ISView(ispetsc,PETSC_VIEWER_STDOUT_WORLD);
34: ISDestroy(&ispetsc);
35: ISDestroy(&isapp);
37: AODestroy(&ao);
38: PetscFinalize();
39: return 0;
40: }
42: /*TEST
44: test:
45: nsize: 2
47: TEST*/