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simpleRCB.F90
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simpleRCB.F90
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program simpleRCB
use mpi
use zoltan
use zoltanRCB
implicit none
integer(Zoltan_INT) :: error
real(Zoltan_FLOAT) :: version
interface
subroutine readInputObjects(fname,ps)
use zoltanRCB
implicit none
character (len=*), intent(in) :: fname
type(particlesType),intent(inout) :: ps
end subroutine readInputObjects
end interface
call MPI_Init(error)
error = Zoltan_Initialize(version)
call readInputObjects("particles.xyz",particles)
print *, particles%gids
call partitionParticlesWithRCB()
call visualizePartition(particles)
deallocate(particles%labels)
deallocate(particles%z,particles%y,particles%x)
deallocate(particles%GIDs)
call zoltanCleanUp()
call MPI_Finalize(error)
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
end program simpleRCB
subroutine readInputObjects(fname, ps)
use mpi
use zoltanRCB
implicit none
character (len=*),intent(in) :: fname
type(particlesType),intent(inout) :: ps
integer :: fnum = 101, i, currIndx
integer :: myRank, numProcs, mpi_ierr
character(len=6) :: label
real :: tmpX, tmpY,tmpZ
call MPI_Comm_rank(MPI_COMM_WORLD, myrank, mpi_ierr)
call MPI_Comm_size(MPI_COMM_WORLD, numProcs, mpi_ierr)
open(unit = fnum, file = fname)
read(fnum,*) ps%nGParticles
ps%nLParticles=0
do i = 1, ps%nGParticles, 1
!! assumes i start at 1, gives round robin initial distribution
if ( MOD(i-1,numProcs) == myRank) then
ps%nLParticles = ps%nLParticles + 1
end if
end do
allocate(ps%GIDs(ps%nLParticles))
allocate(ps%x(ps%nLParticles))
allocate(ps%y(ps%nLParticles))
allocate(ps%z(ps%nLParticles))
allocate(ps%labels(ps%nLParticles))
read(fnum,*) label
currIndx = 1
do i = 1, ps%nGParticles, 1
read(fnum,*) label, tmpX, tmpY,tmpZ
if ( MOD(i-1,numProcs) == myRank) then
ps%GIDs(currIndx) = i
ps%labels(currIndx) = trim(label)
ps%x(currIndx) = tmpX
ps%y(currIndx) = tmpY
ps%z(currIndx) = tmpZ
currIndx = currIndx + 1
end if
end do
close(fnum)
end subroutine readInputObjects
subroutine showSimpleParticlePartitions(myProc,parts,ps,label)
use mpi
use zoltanRCB
implicit none
integer,intent(in) :: myProc
integer,intent(in) :: parts(*)
type(particlesType), intent(in) :: ps
character(len=*),intent(in) :: label
!! Local variables
integer :: i, j, part, ierr
do i=1,ps%nLParticles
write(*,*)label,ps%GIDs(i),parts(i)
enddo
call MPI_Barrier(MPI_COMM_WORLD,ierr)
end subroutine showSimpleParticlePartitions
subroutine visualizePartition(ps)
use mpi
use zoltanRCB
implicit none
type(particlesType),intent(inout) :: ps
integer :: parts(ps%nLParticles)
integer :: myrank, i, error
call MPI_Comm_rank(MPI_COMM_WORLD, myrank, error)
do i=1, ps%nLParticles, 1
parts(i) = myRank;
end do
if (myRank== 0) then
write (*,*) 'Particles assignments before calling Zoltan'
end if
call showSimpleParticlePartitions(myRank, parts,ps,"B");
do i=1, zolt%numExport, 1
parts(zolt%exportLocalGids(i)) = zolt%exportToPart(i)
end do
if (myRank == 0) then
write (*,*) 'Particles assignments after calling Zoltan'
end if
call showSimpleParticlePartitions(myRank,parts,ps,"A")
end subroutine visualizePartition