Actual source code: ex30f.F

petsc-3.3-p6 2013-02-11
  1: !
  2: !
  3: !  Tests parallel to parallel scatter where a to from index are
  4: !  duplicated
  5:       program main
  6:       implicit none

  8: #include <finclude/petscsys.h>
  9: #include <finclude/petscis.h>
 10: #include <finclude/petscvec.h>

 12:       PetscErrorCode ierr
 13:       PetscInt  nlocal, n, row
 14:       PetscInt  nlocal2,n2,eight
 15:       PetscMPIInt rank, size
 16:       PetscInt from(10), to(10)

 18:       PetscScalar num
 19:       Vec v1, v2, v3
 20:       VecScatter scat1, scat2
 21:       IS fromis, tois
 22:       n=8
 23:       nlocal=2
 24:       call PetscInitialize(PETSC_NULL_CHARACTER,ierr)
 25:       call MPI_COMM_RANK(PETSC_COMM_WORLD,rank,ierr)
 26:       call MPI_COMM_SIZE(PETSC_COMM_WORLD,size,ierr)
 27:       if (size.ne.4) then
 28:          print *, 'Four processor test'
 29:          stop
 30:       end if
 31: 
 32:       nlocal2 = 2*nlocal
 33:       n2      = 2*n
 34:       call VecCreateMPI(PETSC_COMM_WORLD,nlocal2,n2,v1,ierr)
 35:       call VecCreateMPI(PETSC_COMM_WORLD,nlocal,n,v2,ierr)
 36:       call VecCreateSeq(PETSC_COMM_SELF,n,v3,ierr)

 38:       num=2.0
 39:       row = 1
 40:       call VecSetValue(v1,row,num,INSERT_VALUES,ierr)
 41:       row = 5
 42:       call VecSetValue(v1,row,num,INSERT_VALUES,ierr)
 43:       row = 9
 44:       call VecSetValue(v1,row,num,INSERT_VALUES,ierr)
 45:       row = 13
 46:       call VecSetValue(v1,row,num,INSERT_VALUES,ierr)
 47:       num=1.0
 48:       row = 15
 49:       call VecSetValue(v1,row,num,INSERT_VALUES,ierr)
 50:       row = 3
 51:       call VecSetValue(v1,row,num,INSERT_VALUES,ierr)
 52:       row = 7
 53:       call VecSetValue(v1,row,num,INSERT_VALUES,ierr)
 54:       row = 11
 55:       call VecSetValue(v1,row,num,INSERT_VALUES,ierr)

 57:       call VecAssemblyBegin(v1,ierr)
 58:       call VecAssemblyEnd(v1,ierr)

 60:       num=0.0
 61:       call VecScale(v2,num,ierr)
 62:       call VecScale(v3,num,ierr)

 64:       from(1)=1
 65:       from(2)=5
 66:       from(3)=9
 67:       from(4)=13
 68:       from(5)=3
 69:       from(6)=7
 70:       from(7)=11
 71:       from(8)=15
 72:       to(1)=0
 73:       to(2)=0
 74:       to(3)=0
 75:       to(4)=0
 76:       to(5)=7
 77:       to(6)=7
 78:       to(7)=7
 79:       to(8)=7

 81:       eight = 8
 82:       call ISCreateGeneral(PETSC_COMM_SELF,eight,from,PETSC_COPY_VALUES,      &
 83:      &                     fromis,ierr)
 84:       call ISCreateGeneral(PETSC_COMM_SELF,eight,to,PETSC_COPY_VALUES,        &
 85:      &                     tois,ierr)
 86:       call VecScatterCreate(v1,fromis,v2,tois,scat1,ierr)
 87:       call VecScatterCreate(v1,fromis,v3,tois,scat2,ierr)
 88:       call ISDestroy(fromis,ierr)
 89:       call ISDestroy(tois,ierr)
 90: 
 91:       call VecScatterBegin(scat1,v1,v2,ADD_VALUES,SCATTER_FORWARD,ierr)
 92:       call VecScatterEnd(scat1,v1,v2,ADD_VALUES,SCATTER_FORWARD,ierr)
 93: 
 94:       call VecScatterBegin(scat2,v1,v3,ADD_VALUES,SCATTER_FORWARD,ierr)
 95:       call VecScatterEnd(scat2,v1,v3,ADD_VALUES,SCATTER_FORWARD,ierr)
 96: 
 97:       call PetscObjectSetName(v1, "V1",ierr)
 98:       call VecView(v1,PETSC_VIEWER_STDOUT_WORLD,ierr)

100:       call PetscObjectSetName(v2, "V2",ierr)
101:       call VecView(v2,PETSC_VIEWER_STDOUT_WORLD,ierr)
102: 
103:       if (rank.eq.0) then
104:          call PetscObjectSetName(v3, "V3",ierr)
105:          call VecView(v3,PETSC_VIEWER_STDOUT_SELF,ierr)
106:       end if

108:       call VecScatterDestroy(scat1,ierr)
109:       call VecScatterDestroy(scat2,ierr)
110:       call VecDestroy(v1,ierr)
111:       call VecDestroy(v2,ierr)
112:       call VecDestroy(v3,ierr)

114:       call PetscFinalize(ierr)
115: 
116:       end
117: