Actual source code: ex2.c
2: static char help[] = "Tests application ordering.\n\n";
4: #include <petscsys.h>
5: #include <petscao.h>
6: #include <petscviewer.h>
8: int main(int argc,char **argv)
9: {
10: PetscMPIInt rank,size;
11: PetscInt n,*ispetsc,*isapp,start,N,i;
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);n = rank + 2;
17: MPI_Comm_size(PETSC_COMM_WORLD,&size);
19: /* create the orderings */
20: PetscMalloc2(n,&ispetsc,n,&isapp);
22: MPI_Scan(&n,&start,1,MPIU_INT,MPI_SUM,PETSC_COMM_WORLD);
23: MPI_Allreduce(&n,&N,1,MPIU_INT,MPI_SUM,PETSC_COMM_WORLD);
24: start -= n;
26: for (i=0; i<n; i++) {
27: ispetsc[i] = start + i;
28: isapp[i] = N - start - i - 1;
29: }
31: /* create the application ordering */
32: AOCreateBasic(PETSC_COMM_WORLD,n,isapp,ispetsc,&ao);
33: AOView(ao,PETSC_VIEWER_STDOUT_WORLD);
35: /* check the mapping */
36: AOPetscToApplication(ao,n,ispetsc);
37: for (i=0; i<n; i++) {
38: if (ispetsc[i] != isapp[i]) {
39: PetscPrintf(PETSC_COMM_WORLD,"[%d] Problem with mapping %" PetscInt_FMT " to %" PetscInt_FMT "\n",rank,i,ispetsc[i]);
40: }
41: }
42: PetscFree2(ispetsc,isapp);
44: AODestroy(&ao);
45: PetscFinalize();
46: return 0;
47: }
49: /*TEST
51: test:
53: test:
54: suffix: 2
55: nsize: 2
57: test:
58: suffix: 3
59: nsize: 3
61: TEST*/