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*/