Actual source code: ex3.c

  2: static char help[] = "Tests AOData.\n\n";

 4:  #include petscao.h
 5:  #include petscbt.h

  9: int main(int argc,char **argv)
 10: {
 11:   int         n = 2,nglobal,bs = 2,*keys,*data,ierr,rank,size,i,start;
 12:   PetscReal   *gd;
 13:   AOData      aodata;
 14:   PetscViewer binary;
 15:   PetscBT     ld;

 17:   PetscInitialize(&argc,&argv,(char*)0,help);
 18:   PetscOptionsGetInt(PETSC_NULL,"-n",&n,PETSC_NULL);

 20:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank); n = n + rank;
 21:   MPI_Allreduce(&n,&nglobal,1,MPI_INT,MPI_SUM,PETSC_COMM_WORLD);
 22:   MPI_Comm_size(PETSC_COMM_WORLD,&size);

 24:   /*
 25:        Create a database with two sets of keys 
 26:   */
 27:   AODataCreateBasic(PETSC_COMM_WORLD,&aodata);
 28:   AODataKeyAdd(aodata,"key1",PETSC_DECIDE,nglobal);
 29:   AODataKeyAdd(aodata,"key2",PETSC_DECIDE,nglobal);

 31:   /* allocate space for the keys each processor will provide */
 32:   PetscMalloc(n*sizeof(int),&keys);

 34:   /*
 35:      We assign the first set of keys (0 to 2) to processor 0, etc.
 36:      This computes the first local key on each processor
 37:   */
 38:   MPI_Scan(&n,&start,1,MPI_INT,MPI_SUM,PETSC_COMM_WORLD);
 39:   start -= n;

 41:   for (i=0; i<n; i++) {
 42:     keys[i]     = start + i;
 43:   }

 45:   /* 
 46:       Allocate data for the first key and first segment 
 47:   */
 48:   PetscMalloc(bs*n*sizeof(int),&data);
 49:   for (i=0; i<n; i++) {
 50:     data[2*i]   = -(start + i);
 51:     data[2*i+1] = -(start + i) - 10000;
 52:   }
 53:   AODataSegmentAdd(aodata,"key1","seg1",bs,n,keys,data,PETSC_INT);
 54:   PetscFree(data);

 56:   /*
 57:       Allocate data for first key and second segment 
 58:   */
 59:   bs   = 3;
 60:   PetscMalloc(bs*n*sizeof(PetscReal),&gd);
 61:   for (i=0; i<n; i++) {
 62:     gd[3*i]   = -(start + i);
 63:     gd[3*i+1] = -(start + i) - 10000;
 64:     gd[3*i+2] = -(start + i) - 100000;
 65:   }
 66:   AODataSegmentAdd(aodata,"key1","seg2",bs,n,keys,gd,PETSC_REAL);

 68:   /*
 69:       Allocate data for first key and third segment 
 70:   */
 71:   bs   = 1;
 72:   PetscBTCreate(n,ld);
 73:   for (i=0; i<n; i++) {
 74:     if (i % 2) PetscBTSet(ld,i);
 75:   }
 76:   AODataSegmentAdd(aodata,"key1","seg3",bs,n,keys,ld,PETSC_LOGICAL);
 77:   PetscBTDestroy(ld);

 79:   /*
 80:        Use same data for second key and first segment 
 81:   */
 82:   bs   = 3;
 83:   AODataSegmentAdd(aodata,"key2","seg1",bs,n,keys,gd,PETSC_REAL);
 84:   PetscFree(gd);
 85:   PetscFree(keys);

 87:   AODataView(aodata,PETSC_VIEWER_STDOUT_WORLD);

 89:   /*
 90:         Save the database to a file
 91:   */
 92:   PetscViewerBinaryOpen(PETSC_COMM_WORLD,"dataoutput",PETSC_FILE_CREATE,&binary);
 93:   AODataView(aodata,binary);
 94:   PetscViewerDestroy(binary);
 95: 
 96:   AODataDestroy(aodata);

 98:   PetscFinalize();
 99:   return 0;
100: }
101: