UseTheForce/DarkSide/simParallel.F90

!!
!! Copyright (c) 2005 The University of Notre Dame. All Rights Reserved.
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!! using, modifying or distributing the software or its
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!!
!! SUPPORT OPEN SCIENCE!  If you use OpenMD or its source code in your
!! research, please cite the appropriate papers when you publish your
!! work.  Good starting points are:
!!                                                                      
!! [1]  Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).             
!! [2]  Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).          
!! [3]  Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008).          
!! [4]  Vardeman & Gezelter, in progress (2009).
!!


!! MPI support for long range forces using force decomposition 
!! on a square grid of processors.
!! Corresponds to mpiSimulation.cpp for C++
!! mpi_module also contains a private interface for mpi f90 routines.
!!
!! @author Charles F. Vardeman II
!! @author Matthew Meineke
!! @version $Id$, $Date$, $Name: not supported by cvs2svn $, $Revision$

module mpiSimulation  
  use definitions
  use status
#ifdef IS_MPI
  use OpenMDMPI
  implicit none
  PRIVATE
#endif


  !! Include mpiComponentPlan type. mpiComponentPlan is a 
  !! dual header file for both c and fortran.
#define __FORTRAN90
#include "UseTheForce/mpiComponentPlan.h"
public :: setupSimParallel

#ifdef IS_MPI

  !! PUBLIC  Subroutines contained in this module
  !! gather and scatter are a generic interface
  !! to gather and scatter routines
  public :: gather, scatter
  public :: setupSimParallel
  public :: replanSimParallel
  public :: getNatomsInCol
  public :: getNatomsInRow
  public :: getNgroupsInCol
  public :: getNgroupsInRow
  public :: isMPISimSet
  public :: printComponentPlan
  public :: getMyNode

  !! PUBLIC  Subroutines contained in MPI module
  public :: mpi_bcast
  public :: mpi_allreduce
  !  public :: mpi_reduce
  public :: mpi_send
  public :: mpi_recv
  public :: mpi_get_processor_name
  public :: mpi_finalize

  !! PUBLIC mpi variables
  public :: mpi_comm_world
  public :: mpi_character
  public :: mpi_integer
  public :: mpi_lor
  public :: mpi_logical
  public :: mpi_real
  public :: mpi_double_precision
  public :: mpi_sum
  public :: mpi_max
  public :: mpi_status_size
  public :: mpi_any_source


  !! Safety logical to prevent access to ComponetPlan until
  !! set by C++.
  logical, save :: ComponentPlanSet = .false.


  !! generic mpi error declaration.
  integer, public :: mpi_err
  character(len = statusMsgSize) :: errMsg

#ifdef PROFILE
  public :: printCommTime
  public :: getCommTime
  real,save   :: commTime = 0.0
  real   :: commTimeInitial,commTimeFinal
#endif


  !! Tags used during force loop for parallel simulation
  integer, public, allocatable, dimension(:) :: AtomLocalToGlobal
  integer, public, allocatable, dimension(:) :: AtomRowToGlobal
  integer, public, allocatable, dimension(:) :: AtomColToGlobal
  integer, public, allocatable, dimension(:) :: AtomGlobalToLocal
  integer, public, allocatable, dimension(:) :: GroupLocalToGlobal
  integer, public, allocatable, dimension(:) :: GroupRowToGlobal
  integer, public, allocatable, dimension(:) :: GroupColToGlobal

  !! Logical set true if mpiSimulation has been initialized
  logical, save :: isSimSet = .false.


  type (mpiComponentPlan), save :: mpiSim

  !! gs_plan contains plans for gather and scatter routines
  type, public :: gs_plan
     private
     type (mpiComponentPlan), pointer :: gsComponentPlan => NULL()
     integer :: gsPlanSize !! size of this plan (nDim*nComponents)
     integer :: globalPlanSize !! size of all components in plan
     integer, dimension(:), pointer :: displs !! Displacements array for mpi indexed from 0.
     integer, dimension(:), pointer :: counts !! Counts array for mpi indexed from 0.
     integer :: myPlanComm  !! My communicator for this plan
     integer :: myPlanRank  !! My rank in this plan
     integer :: planNprocs  !! Number of processors in this plan
  end type gs_plan

  ! plans for different decompositions
  type (gs_plan), public, save :: plan_atom_row
  type (gs_plan), public, save :: plan_atom_row_3d
  type (gs_plan), public, save :: plan_atom_col
  type (gs_plan), public, save :: plan_atom_col_3d
  type (gs_plan),  public, save :: plan_atom_row_Rotation
  type (gs_plan),  public, save :: plan_atom_col_Rotation
  type (gs_plan),  public, save :: plan_group_row
  type (gs_plan),  public, save :: plan_group_col
  type (gs_plan),  public, save :: plan_group_row_3d
  type (gs_plan),  public, save :: plan_group_col_3d

  type (mpiComponentPlan), pointer :: simComponentPlan

  ! interface for gather scatter routines
  !! Generic interface for gather.
  !! Gathers an local array into row or column array
  !! Interface provided for integer, double and double
  !! rank 2 arrays.
  interface gather
     module procedure gather_integer
     module procedure gather_double
     module procedure gather_double_2d
  end interface

  !! Generic interface for scatter.
  !! Scatters a row or column array, adding componets
  !! and reducing them to a local nComponent array.
  !! Interface provided for double and double rank=2 arrays.

  interface scatter
     module procedure scatter_double
     module procedure scatter_double_2d
  end interface


contains

  !! Sets up mpiComponentPlan with structure passed from C++.
  subroutine setupSimParallel(thisComponentPlan, nAtomTags, atomTags, &
       nGroupTags, groupTags, status)
    !! Passed Arguments
    !! mpiComponentPlan struct from C
    type (mpiComponentPlan), intent(inout) :: thisComponentPlan
    !! Number of tags passed
    integer, intent(in) :: nAtomTags, nGroupTags
    !! Result status, 0 = normal, -1 = error
    integer, intent(out) :: status
    integer :: localStatus
    !! Global reference tag for local particles
    integer, dimension(nAtomTags), intent(inout) :: atomTags
    integer, dimension(nGroupTags), intent(inout) :: groupTags

    !write(*,*) 'mpiSim_mod thinks node', thisComponentPlan%myNode, &
    !     ' has atomTags(1) = ', atomTags(1)

    status = 0
    if (componentPlanSet) then
       return
    endif
    componentPlanSet = .true.

    !! copy c component plan to fortran   
    mpiSim = thisComponentPlan 

    call make_Force_Grid(mpiSim, localStatus)
    if (localStatus /= 0) then
       write(errMsg, *) 'An error in making the force grid has occurred'
       call handleError("setupSimParallel", errMsg)
       status = -1
       return
    endif

    call updateGridComponents(mpiSim, localStatus)
    if (localStatus /= 0) then
       write(errMsg,*) "Error updating grid components"
       call handleError("setupSimParallel", errMsg)
       status = -1
       return
    endif

    !! initialize gather and scatter plans used in this simulation
    call plan_gather_scatter(1, mpiSim%nAtomsLocal, &
         mpiSim, mpiSim%rowComm, plan_atom_row)
    call plan_gather_scatter(nDim, mpiSim%nAtomsLocal, &
         mpiSim, mpiSim%rowComm, plan_atom_row_3d)
    call plan_gather_scatter(9, mpiSim%nAtomsLocal, &
         mpiSim, mpiSim%rowComm, plan_atom_row_Rotation)
    call plan_gather_scatter(1, mpiSim%nGroupsLocal, &
         mpiSim, mpiSim%rowComm, plan_group_row)
    call plan_gather_scatter(nDim, mpiSim%nGroupsLocal, &
         mpiSim, mpiSim%rowComm, plan_group_row_3d)

    call plan_gather_scatter(1, mpiSim%nAtomsLocal, &
         mpiSim, mpiSim%columnComm, plan_atom_col)
    call plan_gather_scatter(nDim, mpiSim%nAtomsLocal, &
         mpiSim, mpiSim%columnComm, plan_atom_col_3d)
    call plan_gather_scatter(9, mpiSim%nAtomsLocal, &
         mpiSim, mpiSim%columnComm, plan_atom_col_Rotation)
    call plan_gather_scatter(1, mpiSim%nGroupsLocal, &
         mpiSim, mpiSim%columnComm, plan_group_col)
    call plan_gather_scatter(nDim, mpiSim%nGroupsLocal, &
         mpiSim, mpiSim%columnComm, plan_group_col_3d)

    !  Initialize tags    

    call setAtomTags(atomTags,localStatus)
    if (localStatus /= 0) then
       write(errMsg, *) 'An error in setting Atom Tags has occured'
       call handleError("setupSimParallel", errMsg)
       status = -1
       return
    endif


    call setGroupTags(groupTags,localStatus)
    if (localStatus /= 0) then
       write(errMsg, *) 'An error in setting Group Tags has occured'
       call handleError("setupSimParallel", errMsg)
       status = -1
       return
    endif

    isSimSet = .true.

    !    call printComponentPlan(mpiSim,0)
  end subroutine setupSimParallel

  subroutine replanSimParallel(thisComponentPlan,status)
    !  Passed Arguments
    !! mpiComponentPlan struct from C
    type (mpiComponentPlan), intent(inout) :: thisComponentPlan   
    integer, intent(out) :: status
    integer :: localStatus
    integer :: mpierror
    status = 0

    call updateGridComponents(thisComponentPlan,localStatus)
    if (localStatus /= 0) then
       status = -1
       return
    endif

    !! Unplan Gather Scatter plans
    call unplan_gather_scatter(plan_atom_row)
    call unplan_gather_scatter(plan_atom_row_3d)
    call unplan_gather_scatter(plan_atom_row_Rotation)
    call unplan_gather_scatter(plan_group_row)
    call unplan_gather_scatter(plan_group_row_3d)

    call unplan_gather_scatter(plan_atom_col)
    call unplan_gather_scatter(plan_atom_col_3d)
    call unplan_gather_scatter(plan_atom_col_Rotation)
    call unplan_gather_scatter(plan_group_col)
    call unplan_gather_scatter(plan_group_col_3d)

    !! initialize gather and scatter plans used in this simulation
    call plan_gather_scatter(1, mpiSim%nAtomsLocal, &
         mpiSim, mpiSim%rowComm, plan_atom_row)
    call plan_gather_scatter(nDim, mpiSim%nAtomsLocal, &
         mpiSim, mpiSim%rowComm, plan_atom_row_3d)
    call plan_gather_scatter(9, mpiSim%nAtomsLocal, &
         mpiSim, mpiSim%rowComm, plan_atom_row_Rotation)
    call plan_gather_scatter(1, mpiSim%nGroupsLocal, &
         mpiSim, mpiSim%rowComm, plan_group_row)
    call plan_gather_scatter(nDim, mpiSim%nGroupsLocal, &
         mpiSim, mpiSim%rowComm, plan_group_row_3d)

    call plan_gather_scatter(1, mpiSim%nAtomsLocal, &
         mpiSim, mpiSim%columnComm, plan_atom_col)
    call plan_gather_scatter(nDim, mpiSim%nAtomsLocal, &
         mpiSim, mpiSim%columnComm, plan_atom_col_3d)
    call plan_gather_scatter(9, mpiSim%nAtomsLocal, &
         mpiSim, mpiSim%columnComm, plan_atom_col_Rotation)
    call plan_gather_scatter(1, mpiSim%nGroupsLocal, &
         mpiSim, mpiSim%columnComm, plan_group_col)
    call plan_gather_scatter(nDim, mpiSim%nGroupsLocal, &
         mpiSim, mpiSim%columnComm, plan_group_col_3d)

  end subroutine replanSimParallel

  !! Updates number of row and column components for long range forces.
  subroutine updateGridComponents(thisComponentPlan, status)
    type (mpiComponentPlan) :: thisComponentPlan !! mpiComponentPlan

    !! Status return
    !! -  0 Success
    !! - -1 Failure
    integer, intent(out) :: status 
    integer :: nAtomsLocal
    integer :: nAtomsInRow = 0
    integer :: nAtomsInColumn = 0
    integer :: nGroupsLocal
    integer :: nGroupsInRow = 0
    integer :: nGroupsInColumn = 0
    integer :: mpiErrors

    status = 0
    if (.not. componentPlanSet) return

    if (thisComponentPlan%nAtomsLocal == 0) then
       status = -1
       return
    endif
    if (thisComponentPlan%nGroupsLocal == 0) then
       write(*,*) 'tcp%ngl = ', thisComponentPlan%nGroupsLocal
       status = -1
       return
    endif

    nAtomsLocal = thisComponentPlan%nAtomsLocal
    nGroupsLocal = thisComponentPlan%nGroupsLocal

    call mpi_allreduce(nAtomsLocal, nAtomsInRow, 1, mpi_integer, &
         mpi_sum, thisComponentPlan%rowComm, mpiErrors)
    if (mpiErrors /= 0) then
       status = -1
       return
    endif

    call mpi_allreduce(nAtomsLocal, nAtomsInColumn, 1, mpi_integer, &
         mpi_sum, thisComponentPlan%columnComm, mpiErrors)    
    if (mpiErrors /= 0) then
       status = -1
       return
    endif

    call mpi_allreduce(nGroupsLocal, nGroupsInRow, 1, mpi_integer, &
         mpi_sum, thisComponentPlan%rowComm, mpiErrors)
    if (mpiErrors /= 0) then
       status = -1
       return
    endif

    call mpi_allreduce(nGroupsLocal, nGroupsInColumn, 1, mpi_integer, &
         mpi_sum, thisComponentPlan%columnComm, mpiErrors)    
    if (mpiErrors /= 0) then
       status = -1
       return
    endif

    thisComponentPlan%nAtomsInRow = nAtomsInRow
    thisComponentPlan%nAtomsInColumn = nAtomsInColumn
    thisComponentPlan%nGroupsInRow = nGroupsInRow
    thisComponentPlan%nGroupsInColumn = nGroupsInColumn

  end subroutine updateGridComponents


  !! Creates a square force decomposition of processors into row and column
  !! communicators.
  subroutine make_Force_Grid(thisComponentPlan,status)
    type (mpiComponentPlan) :: thisComponentPlan
    integer, intent(out) :: status !! status returns -1 if error
    integer :: nColumnsMax !! Maximum number of columns
    integer :: nWorldProcessors !! Total number of processors in World comm.
    integer :: rowIndex !! Row for this processor.
    integer :: columnIndex !! Column for this processor.
    integer :: nRows !! Total number of rows.
    integer :: nColumns !! Total number of columns.
    integer :: mpiErrors !! MPI errors.
    integer :: rowCommunicator !! MPI row communicator.
    integer :: columnCommunicator
    integer :: myWorldRank
    integer :: i


    if (.not. ComponentPlanSet) return
    status = 0

    !! We make a dangerous assumption here that if numberProcessors is
    !! zero, then we need to get the information from MPI.
    if (thisComponentPlan%nProcessors == 0 ) then 
       call mpi_comm_size( MPI_COMM_WORLD, nWorldProcessors,mpiErrors)
       if ( mpiErrors /= 0 ) then
          status = -1 
          return
       endif
       call mpi_comm_rank( MPI_COMM_WORLD,myWorldRank,mpiErrors)
       if ( mpiErrors /= 0 ) then
          status = -1 
          return
       endif

    else
       nWorldProcessors = thisComponentPlan%nProcessors
       myWorldRank = thisComponentPlan%myNode
    endif

    nColumnsMax = nint(sqrt(real(nWorldProcessors,kind=dp)))

    do i = 1, nColumnsMax
       if (mod(nWorldProcessors,i) == 0) nColumns = i
    end do

    nRows = nWorldProcessors/nColumns

    rowIndex = myWorldRank/nColumns

    call mpi_comm_split(mpi_comm_world,rowIndex,0,rowCommunicator,mpiErrors)
    if ( mpiErrors /= 0 ) then
       write(errMsg, *) 'An error ',mpiErrors ,'occurred in splitting communicators'
       call handleError("makeForceGrid", errMsg)
       status = -1 
       return
    endif

    columnIndex = mod(myWorldRank,nColumns)
    call mpi_comm_split(mpi_comm_world,columnIndex,0,columnCommunicator,mpiErrors)
    if ( mpiErrors /= 0 ) then
       write(errMsg, *) "MPI comm split faild at columnCommunicator by error ",mpiErrors 
       call handleError("makeForceGrid", errMsg)
       status = -1 
       return
    endif

    ! Set appropriate components of thisComponentPlan
    thisComponentPlan%rowComm = rowCommunicator
    thisComponentPlan%columnComm = columnCommunicator
    thisComponentPlan%rowIndex = rowIndex
    thisComponentPlan%columnIndex = columnIndex
    thisComponentPlan%nRows = nRows
    thisComponentPlan%nColumns = nColumns

  end subroutine make_Force_Grid

  !! initalizes a gather scatter plan
  subroutine plan_gather_scatter( nDim, nObjects, thisComponentPlan, &
       thisComm, this_plan, status)  
    integer, intent(in) :: nDim !! Number of dimensions for gather scatter plan
    integer, intent(in) :: nObjects
    type (mpiComponentPlan), intent(in), target :: thisComponentPlan
    type (gs_plan), intent(out) :: this_plan !! MPI Component Plan
    integer, intent(in) :: thisComm !! MPI communicator for this plan

    integer :: arraySize !! size to allocate plan for
    integer, intent(out), optional :: status
    integer :: ierror
    integer :: i,junk

    if (present(status)) status = 0

    !! Set gsComponentPlan pointer 
    !! to the componet plan we want to use for this gather scatter plan.
    !! WARNING this could be dangerous since thisComponentPlan was origionally
    !! allocated in C++ and there is a significant difference between c and 
    !! f95 pointers....  
    this_plan%gsComponentPlan => thisComponentPlan

    ! Set this plan size for displs array.
    this_plan%gsPlanSize = nDim * nObjects

    ! Duplicate communicator for this plan
    call mpi_comm_dup(thisComm, this_plan%myPlanComm, mpi_err)
    if (mpi_err /= 0) then
       if (present(status)) status = -1
       return
    end if
    call mpi_comm_rank(this_plan%myPlanComm, this_plan%myPlanRank, mpi_err)
    if (mpi_err /= 0) then
       if (present(status)) status = -1
       return
    end if

    call mpi_comm_size(this_plan%myPlanComm, this_plan%planNprocs, mpi_err)

    if (mpi_err /= 0) then
       if (present(status)) status = -1
       return
    end if

    !! counts and displacements arrays are indexed from 0 to be compatable
    !! with MPI arrays.
    allocate (this_plan%counts(0:this_plan%planNprocs-1),STAT=ierror)
    if (ierror /= 0) then
       if (present(status)) status = -1
       return
    end if

    allocate (this_plan%displs(0:this_plan%planNprocs-1),STAT=ierror)
    if (ierror /= 0) then
       if (present(status)) status = -1
       return
    end if

    !! gather all the local sizes into a size # processors array.
    call mpi_allgather(this_plan%gsPlanSize,1,mpi_integer,this_plan%counts, &
         1,mpi_integer,thisComm,mpi_err)

    if (mpi_err /= 0) then
       if (present(status)) status = -1
       return
    end if

    !! figure out the total number of particles in this plan
    this_plan%globalPlanSize = sum(this_plan%counts)

    !! initialize plan displacements.
    this_plan%displs(0) = 0
    do i = 1, this_plan%planNprocs - 1,1
       this_plan%displs(i) = this_plan%displs(i-1) + this_plan%counts(i-1) 
    end do
  end subroutine plan_gather_scatter

  subroutine unplan_gather_scatter(this_plan)
    type (gs_plan), intent(inout) :: this_plan

    this_plan%gsComponentPlan => null()
    call mpi_comm_free(this_plan%myPlanComm,mpi_err)

    deallocate(this_plan%counts)
    deallocate(this_plan%displs)

  end subroutine unplan_gather_scatter

  subroutine gather_integer( sbuffer, rbuffer, this_plan, status)

    type (gs_plan), intent(inout) :: this_plan
    integer, dimension(:), intent(inout) :: sbuffer
    integer, dimension(:), intent(inout) :: rbuffer
    integer :: noffset
    integer, intent(out), optional :: status
    integer :: i

    if (present(status)) status = 0
    noffset = this_plan%displs(this_plan%myPlanRank)

    !    if (getmyNode() == 1) then
    !       write(*,*) "Node 0 printing allgatherv vars"
    !       write(*,*) "Noffset: ", noffset
    !       write(*,*) "PlanSize: ", this_plan%gsPlanSize
    !       write(*,*) "PlanComm: ", this_plan%myPlanComm
    !    end if

    call mpi_allgatherv(sbuffer,this_plan%gsPlanSize, mpi_integer, &
         rbuffer,this_plan%counts,this_plan%displs,mpi_integer, &
         this_plan%myPlanComm, mpi_err)

    if (mpi_err /= 0) then
       write(errMsg, *) "mpi_allgatherv failed by error message ",mpi_err 
       call handleError("gather_integer", errMsg)
       if (present(status)) status  = -1
    endif

  end subroutine gather_integer

  subroutine gather_double( sbuffer, rbuffer, this_plan, status)

    type (gs_plan), intent(in) :: this_plan
    real( kind = DP ), dimension(:), intent(inout) :: sbuffer
    real( kind = DP ), dimension(:), intent(inout) :: rbuffer
    integer :: noffset
    integer, intent(out), optional :: status


    if (present(status)) status = 0
    noffset = this_plan%displs(this_plan%myPlanRank)
#ifdef PROFILE
    call cpu_time(commTimeInitial)
#endif
#ifdef SINGLE_PRECISION
    call mpi_allgatherv(sbuffer,this_plan%gsPlanSize, mpi_real, &
         rbuffer,this_plan%counts,this_plan%displs,mpi_real, &
         this_plan%myPlanComm, mpi_err)
#else
    call mpi_allgatherv(sbuffer,this_plan%gsPlanSize, mpi_double_precision, &
         rbuffer,this_plan%counts,this_plan%displs,mpi_double_precision, &
         this_plan%myPlanComm, mpi_err)
#endif
#ifdef PROFILE
    call cpu_time(commTimeFinal)
    commTime = commTime + commTimeFinal - commTimeInitial
#endif

    if (mpi_err /= 0) then
       write(errMsg, *) "mpi_allgatherv failed by error message ",mpi_err 
       call handleError("gather_double", errMsg)
       if (present(status)) status  = -1
    endif

  end subroutine gather_double

  subroutine gather_double_2d( sbuffer, rbuffer, this_plan, status)

    type (gs_plan), intent(in) :: this_plan
    real( kind = DP ), dimension(:,:), intent(inout) :: sbuffer
    real( kind = DP ), dimension(:,:), intent(inout) :: rbuffer
    integer :: noffset,i,ierror
    integer, intent(out), optional :: status

    external  mpi_allgatherv

    if (present(status)) status = 0

    !    noffset = this_plan%displs(this_plan%me)
#ifdef PROFILE
    call cpu_time(commTimeInitial)
#endif

#ifdef SINGLE_PRECISION
    call mpi_allgatherv(sbuffer,this_plan%gsPlanSize, mpi_real, &
         rbuffer,this_plan%counts,this_plan%displs,mpi_real, &
         this_plan%myPlanComm, mpi_err)
#else
    call mpi_allgatherv(sbuffer,this_plan%gsPlanSize, mpi_double_precision, &
         rbuffer,this_plan%counts,this_plan%displs,mpi_double_precision, &
         this_plan%myPlanComm, mpi_err)
#endif

#ifdef PROFILE
    call cpu_time(commTimeFinal)
    commTime = commTime + commTimeFinal - commTimeInitial
#endif

    if (mpi_err /= 0) then
       write(errMsg, *) "mpi_allgatherv failed by error message ",mpi_err 
       call handleError("gather_double_2d", errMsg)
       if (present(status)) status = -1
    endif

  end subroutine gather_double_2d

  subroutine scatter_double( sbuffer, rbuffer, this_plan, status)

    type (gs_plan), intent(in) :: this_plan
    real( kind = DP ), dimension(:), intent(inout) :: sbuffer
    real( kind = DP ), dimension(:), intent(inout) :: rbuffer
    integer, intent(out), optional :: status
    external mpi_reduce_scatter

    if (present(status)) status = 0

#ifdef PROFILE
    call cpu_time(commTimeInitial)
#endif
#ifdef SINGLE_PRECISION
    call mpi_reduce_scatter(sbuffer,rbuffer, this_plan%counts, &
         mpi_real, MPI_SUM, this_plan%myPlanComm, mpi_err)
#else
    call mpi_reduce_scatter(sbuffer,rbuffer, this_plan%counts, &
         mpi_double_precision, MPI_SUM, this_plan%myPlanComm, mpi_err)
#endif
#ifdef PROFILE
    call cpu_time(commTimeFinal)
    commTime = commTime + commTimeFinal - commTimeInitial
#endif

    if (mpi_err /= 0) then
       write(errMsg, *) "mpi_reduce_scatter failed by error message ",mpi_err 
       call handleError("scatter_double", errMsg)
       if (present(status))  status = -1
    endif

  end subroutine scatter_double

  subroutine scatter_double_2d( sbuffer, rbuffer, this_plan, status)

    type (gs_plan), intent(in) :: this_plan
    real( kind = DP ), dimension(:,:), intent(inout) :: sbuffer
    real( kind = DP ), dimension(:,:), intent(inout) :: rbuffer
    integer, intent(out), optional :: status
    external mpi_reduce_scatter

    if (present(status)) status = 0
#ifdef PROFILE
    call cpu_time(commTimeInitial)
#endif
#ifdef SINGLE_PRECISION
    call mpi_reduce_scatter(sbuffer,rbuffer, this_plan%counts, &
         mpi_real, MPI_SUM, this_plan%myPlanComm, mpi_err)
#else
    call mpi_reduce_scatter(sbuffer,rbuffer, this_plan%counts, &
         mpi_double_precision, MPI_SUM, this_plan%myPlanComm, mpi_err)
#endif
#ifdef PROFILE
    call cpu_time(commTimeFinal)
    commTime = commTime + commTimeFinal - commTimeInitial
#endif

    if (mpi_err /= 0) then
       write(errMsg, *) "mpi_reduce_scatter failed by error message ",mpi_err 
       call handleError("scatter_double_2d", errMsg)
       if (present(status)) status = -1
    endif

  end subroutine scatter_double_2d

  subroutine setAtomTags(tags, status)
    integer, dimension(:) :: tags
    integer :: status

    integer :: alloc_stat

    integer :: nAtomsInCol
    integer :: nAtomsInRow
    integer :: i, glob, nAtomTags, maxGlobal
    

    status = 0
    ! allocate row arrays
    nAtomsInRow = getNatomsInRow(plan_atom_row)
    nAtomsInCol = getNatomsInCol(plan_atom_col)

    if(.not. allocated(AtomLocalToGlobal)) then
       allocate(AtomLocalToGlobal(size(tags)),STAT=alloc_stat)
       if (alloc_stat /= 0 ) then
          status = -1 
          return
       endif
    else
       deallocate(AtomLocalToGlobal)
       allocate(AtomLocalToGlobal(size(tags)),STAT=alloc_stat)
       if (alloc_stat /= 0 ) then
          status = -1 
          return
       endif

    endif

    AtomLocalToGlobal = tags

    if (.not. allocated(AtomRowToGlobal)) then
       allocate(AtomRowToGlobal(nAtomsInRow),STAT=alloc_stat)
       if (alloc_stat /= 0 ) then
          status = -1 
          return
       endif
    else
       deallocate(AtomRowToGlobal)
       allocate(AtomRowToGlobal(nAtomsInRow),STAT=alloc_stat)
       if (alloc_stat /= 0 ) then
          status = -1 
          return
       endif

    endif
    ! allocate column arrays
    if (.not. allocated(AtomColToGlobal)) then
       allocate(AtomColToGlobal(nAtomsInCol),STAT=alloc_stat)
       if (alloc_stat /= 0 ) then
          status = -1 
          return
       endif
    else
       deallocate(AtomColToGlobal)
       allocate(AtomColToGlobal(nAtomsInCol),STAT=alloc_stat)
       if (alloc_stat /= 0 ) then
          status = -1 
          return
       endif
    endif

    call gather(tags, AtomRowToGlobal, plan_atom_row)
    call gather(tags, AtomColToGlobal, plan_atom_col)

    nAtomTags = size(tags)
    maxGlobal = -1
    do i = 1, nAtomTags
       if (tags(i).gt.maxGlobal) maxGlobal = tags(i)
    enddo

    if(.not. allocated(AtomGlobalToLocal)) then
       allocate(AtomGlobalToLocal(maxGlobal),STAT=alloc_stat)
       if (alloc_stat /= 0 ) then
          status = -1 
          return
       endif
    else
       deallocate(AtomGlobalToLocal)
       allocate(AtomGlobalToLocal(maxGlobal),STAT=alloc_stat)
       if (alloc_stat /= 0 ) then
          status = -1 
          return
       endif

    endif

    do i = 1, nAtomTags
       glob = AtomLocalToGlobal(i)
       AtomGlobalToLocal(glob) = i
    enddo

  end subroutine setAtomTags

  subroutine setGroupTags(tags, status)
    integer, dimension(:) :: tags
    integer :: status

    integer :: alloc_stat

    integer :: nGroupsInCol
    integer :: nGroupsInRow

    status = 0

    nGroupsInRow = getNgroupsInRow(plan_group_row)
    nGroupsInCol = getNgroupsInCol(plan_group_col)

    if(allocated(GroupLocalToGlobal)) then
       deallocate(GroupLocalToGlobal)
    endif
    allocate(GroupLocalToGlobal(size(tags)),STAT=alloc_stat)
    if (alloc_stat /= 0 ) then
       status = -1 
       return
    endif

    GroupLocalToGlobal = tags

    if(allocated(GroupRowToGlobal)) then
       deallocate(GroupRowToGlobal)
    endif
    allocate(GroupRowToGlobal(nGroupsInRow),STAT=alloc_stat)
    if (alloc_stat /= 0 ) then
       status = -1 
       return
    endif

    if(allocated(GroupColToGlobal)) then
       deallocate(GroupColToGlobal)
    endif
    allocate(GroupColToGlobal(nGroupsInCol),STAT=alloc_stat)
    if (alloc_stat /= 0 ) then
       status = -1 
       return
    endif

    call gather(tags, GroupRowToGlobal, plan_group_row)
    call gather(tags, GroupColToGlobal, plan_group_col)

  end subroutine setGroupTags

  function getNatomsInCol(thisplan) result(nInCol)
    type (gs_plan), intent(in) :: thisplan
    integer :: nInCol
    nInCol = thisplan%gsComponentPlan%nAtomsInColumn
  end function getNatomsInCol

  function getNatomsInRow(thisplan) result(nInRow)
    type (gs_plan), intent(in) :: thisplan
    integer :: nInRow
    nInRow = thisplan%gsComponentPlan%nAtomsInRow
  end function getNatomsInRow

  function getNgroupsInCol(thisplan) result(nInCol)
    type (gs_plan), intent(in) :: thisplan
    integer :: nInCol
    nInCol = thisplan%gsComponentPlan%nGroupsInColumn
  end function getNgroupsInCol

  function getNgroupsInRow(thisplan) result(nInRow)
    type (gs_plan), intent(in) :: thisplan
    integer :: nInRow
    nInRow = thisplan%gsComponentPlan%nGroupsInRow
  end function getNgroupsInRow

  function isMPISimSet() result(isthisSimSet)
    logical :: isthisSimSet
    if (isSimSet) then 
       isthisSimSet = .true.
    else
       isthisSimSet = .false.
    endif
  end function isMPISimSet

  subroutine printComponentPlan(this_plan,printNode)

    type (mpiComponentPlan), intent(in) :: this_plan
    integer, optional :: printNode
    logical :: print_me = .false.

    if (present(printNode)) then
       if (printNode == mpiSim%myNode) print_me = .true.
    else
       print_me = .true.
    endif

    if (print_me) then
       write(default_error,*) "SetupSimParallel: writing component plan"

       write(default_error,*) "nMolGlobal: ", mpiSim%nMolGlobal
       write(default_error,*) "nAtomsGlobal: ", mpiSim%nAtomsGlobal
       write(default_error,*) "nAtomsLocal: ", mpiSim%nAtomsLocal
       write(default_error,*) "myNode: ", mpiSim%myNode
       write(default_error,*) "nProcessors: ", mpiSim%nProcessors
       write(default_error,*) "rowComm: ", mpiSim%rowComm
       write(default_error,*) "columnComm: ", mpiSim%columnComm
       write(default_error,*) "nRows: ", mpiSim%nRows
       write(default_error,*) "nColumns: ", mpiSim%nColumns
       write(default_error,*) "nAtomsInRow: ", mpiSim%nAtomsInRow
       write(default_error,*) "nAtomsInColumn: ", mpiSim%nAtomsInColumn
       write(default_error,*) "rowIndex: ", mpiSim%rowIndex
       write(default_error,*) "columnIndex: ", mpiSim%columnIndex
    endif
  end subroutine printComponentPlan

  function getMyNode() result(myNode)
    integer :: myNode
    myNode = mpiSim%myNode
  end function getMyNode

#ifdef PROFILE
  subroutine printCommTime()
    write(*,*) "MPI communication time is: ", commTime
  end subroutine printCommTime

  function getCommTime() result(comm_time)
    real :: comm_time
    comm_time = commTime
  end function getCommTime

#endif

#else
contains
  subroutine setupSimParallel(thisComponentPlan, nAtomTags, atomTags, &
       nGroupTags, groupTags, status)
  !! Passed Arguments
    !! mpiComponentPlan struct from C
    type (mpiComponentPlan), intent(inout) :: thisComponentPlan
    !! Number of tags passed
    integer, intent(in) :: nAtomTags, nGroupTags
    !! Result status, 0 = normal, -1 = error
    integer, intent(out) :: status
    integer :: localStatus
    !! Global reference tag for local particles
    integer, dimension(nAtomTags), intent(inout) :: atomTags
    integer, dimension(nGroupTags), intent(inout) :: groupTags
   
  end subroutine setupSimParallel

#endif


end module mpiSimulation

Revision:	1496
Committed:	Wed Sep 8 20:42:24 2010 UTC (14 years, 8 months ago) by chuckv
File size:	32204 byte(s)
Log Message:	Somewhat working cmake build system now. Does not yet build a parallel target. Builds all non-mpi programs.