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evolveHK.f90
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!>
!! \brief This module contains routines for calculating the ionization and temperature evolution of the entire grid (3D).
!!
!! Module for Capreole / C2-Ray (f90)
!!
!! \b Author: Garrelt Mellema
!!
!! \b Date:
!!
!! \b Version: 3D, no OpenMP
module evolve
! This module contains routines having to do with the calculation of
! the ionization evolution of the entire grid (3D).
! This version has been adapted for efficiency in order to be able
! to calculate large meshes.
! - evolve3D : step through grid
! - get_rate : take care of one grid point
! - evolution_of_cell: update entire grid
use precision, only: dp
use my_mpi
use file_admin, only: logf,timefile,iterdump, results_dir
use clocks, only: timestamp_wallclock
use sizes, only: Ndim, mesh
use grid, only: x_coordinate, y_coordinate, z_coordinate, cell_vol, cell_size
use material, only: number_density_array, xHI_array, xHII_array, temperature_array
use sourceprops, only: NumSrc, srcpos, NormFlux
use radiation, only: NumFreqBnd
use cosmology, only: time2zred
use photonstatistics, only: state_before, calculate_photon_statistics, &
photon_loss, LLS_loss, report_photonstatistics, &
state_after, total_rates, total_ionizations, &
update_grandtotal_photonstatistics
use c2ray_parameters, only: convergence_fraction, max_subbox, S_star_nominal
implicit none
save
private
public :: evolve3D, photoionization_array, heating_array, evolve_ini
! Periodic boundary conditions, has to be true for this version
logical, parameter :: periodic_bc = .true.
! Minimum number of MPI processes for using the master-slave setup
integer, parameter :: min_numproc_master_slave=10
! Variables connected to checking converge of global average ionization
! fraction
! Sum of intermediate ionization fraction xh_intermed(*,1)
! (used for convergence checking)
real(kind=dp) :: current_sum_xHII
! Previous value of this sum
real(kind=dp) :: prev_sum_xHII
! Relative change in this sum (between iteration steps)
real(kind=dp) :: delta_sum_xHII
! Grid variables
!> H Photo-ionization rate on the entire grid
real(kind=dp),dimension(:,:,:),allocatable :: photoionization_array
real(kind=dp),dimension(:,:,:),allocatable :: heating_array
!> Time-averaged H ionization fraction
real(kind=dp),dimension(:,:,:),allocatable :: intermediate_average_xHI
real(kind=dp),dimension(:,:,:),allocatable :: intermediate_average_xHII
!> Intermediate result for H ionization fraction
real(kind=dp),dimension(:,:,:),allocatable,public :: intermediate_end_xHI
real(kind=dp),dimension(:,:,:),allocatable,public :: intermediate_end_xHII
!> Intermediate result for Temperature
real(kind=dp),dimension(:,:,:),allocatable,public :: intermediate_end_temperature
real(kind=dp),dimension(:,:,:),allocatable,public :: intermediate_average_temperature
!> H0 Column density (outgoing)
real(kind=dp),dimension(:,:,:),allocatable :: coldensh_out
!> Buffer for MPI communication
real(kind=dp),dimension(:,:,:),allocatable :: buffer
!> Photon loss from the grid
real(kind=dp) :: photon_loss_all(1:NumFreqBnd)
!> Photon loss from one source
real(kind=dp),dimension(:,:),allocatable :: photon_loss_src_thread
real(kind=dp) :: photon_loss_src(1:NumFreqBnd)
! mesh positions of end points for RT
integer,dimension(Ndim) :: last_l !< mesh position of left end point for RT
integer,dimension(Ndim) :: last_r !< mesh position of right end point for RT
! GM/121127: This variable should always be set. If not running OpenMP
! it should be equal to 1. We initialize it to 1 here.
integer :: tn=1 !< thread number
contains
! =======================================================================
!> Allocate the arrays needed for evolve
subroutine evolve_ini ()
allocate(photoionization_array(mesh(1),mesh(2),mesh(3)))
allocate(heating_array(mesh(1),mesh(2),mesh(3)))
allocate(intermediate_average_xHI(mesh(1),mesh(2),mesh(3)))
allocate(intermediate_average_xHII(mesh(1),mesh(2),mesh(3)))
allocate(intermediate_end_xHI(mesh(1),mesh(2),mesh(3)))
allocate(intermediate_end_xHII(mesh(1),mesh(2),mesh(3)))
allocate(intermediate_end_temperature(mesh(1),mesh(2),mesh(3)))
allocate(intermediate_average_temperature(mesh(1),mesh(2),mesh(3)))
allocate(coldensh_out(mesh(1),mesh(2),mesh(3)))
allocate(buffer(mesh(1),mesh(2),mesh(3)))
allocate(photon_loss_src_thread(1:NumFreqBnd,nthreads))
end subroutine evolve_ini
! ===========================================================================
!> Evolve the entire grid over a time step dt
subroutine evolve3D (time,dt,restart)
! Calculates the evolution of the hydrogen ionization state
! Author: Garrelt Mellema
! Date: 28-Feb-2008 (21-Aug-2006 (f77/OMP: 13-Jun-2005))
! Version: Multiple sources / Using average fractions to converge
! loop over sources
! History:
! 11-Jun-2004 (GM) : grid arrays now passed via common (in grid.h)
! and material arrays also (in material.h).
! 11-Jun-2004 (GM) : adapted for multiple sources.
! 3-Jan-2005 (GM) : reintegrated with updated Ifront3D
! 20-May-2005 (GM) : split original eveolve0D into two routines
! 13-Jun-2005 (HM) : OpenMP version : Hugh Merz
! 21-Aug-2006 (GM) : MPI parallelization over the sources (static model).
! 28-Feb-2008 (GM) : Added master-slave model for distributing
! over the processes. The program decides which
! model to use.
! The time step
real(kind=dp),intent(in) :: time !< time
real(kind=dp),intent(in) :: dt !< time step
integer,intent(in) :: restart !< restart flag
! Loop variables
integer :: iteration_counter ! iteration counter
! Wall clock counting
! 8 bytes to beat the maxcount
integer(kind=8) :: wallclock1
integer(kind=8) :: wallclock2
integer(kind=8) :: countspersec
! Flag variable (passed back from evolution_of_cell)
integer :: convergence_failure
! Minimum number of cells which are allowed to be non-converged
integer :: conv_criterion
#ifdef MPI
integer :: mympierror
#endif
! End of declarations
! Initialize wall clock counter (for dumps)
call system_clock(wallclock1)
! Initial state (for photon statistics)
call state_before (xHI_array, xHII_array)
! initialize average and intermediate results to initial values
if (restart == 0) then
intermediate_average_xHI(:,:,:) = xHI_array(:,:,:)
intermediate_average_xHII(:,:,:) = xHII_array(:,:,:)
intermediate_end_xHI(:,:,:) = xHI_array(:,:,:)
intermediate_end_xHII(:,:,:) = xHII_array(:,:,:)
intermediate_end_temperature(:,:,:) = temperature_array(:,:,:)
intermediate_average_temperature(:,:,:) = temperature_array(:,:,:)
iteration_counter = 0 ! iteration starts at zero
convergence_failure = mesh(1)*mesh(2)*mesh(3) ! initialize non-convergence
prev_sum_xHII = mesh(1)*mesh(2)*mesh(3) ! initialize non-convergence
delta_sum_xHII = 1.0 ! initialize non-convergence
else
! Reload xh_av,xh_intermed,photon_loss,iteration_counter
call start_from_dump(restart,iteration_counter)
call evolution_of_grid (convergence_failure,dt)
endif
! Set the conv_criterion, if there are few sources we should make
! sure that things are converged around these sources.
conv_criterion = min(int(convergence_fraction*mesh(1)*mesh(2)*mesh(3)),(NumSrc-1)/3)
! Report time
if (rank == 0) write(timefile,"(A,F8.1)") &
"Time before starting iteration: ", timestamp_wallclock ()
! Iterate to reach convergence for multiple sources
do
! Update xh if converged and exit
current_sum_xHII = sum(intermediate_end_xHII(:,:,:))
if (current_sum_xHII .gt. 0.0) then
delta_sum_xHII = abs(current_sum_xHII-prev_sum_xHII)/current_sum_xHII
else
delta_sum_xHII = 1.0
endif
! Convergence test
if (convergence_failure .le. conv_criterion .or. delta_sum_xHII .lt. convergence_fraction) then
xHI_array(:,:,:) = intermediate_end_xHI(:,:,:)
xHII_array(:,:,:) = intermediate_end_xHII(:,:,:)
temperature_array(:,:,:) = intermediate_end_temperature(:,:,:)
! Report
if (rank == 0) then
write(logf,*) "Multiple sources convergence reached"
write(logf,*) "Test 1 values: ",convergence_failure, conv_criterion
write(logf,*) "Test 2 values: ",delta_sum_xHII, &
convergence_fraction
endif
exit
else
if (iteration_counter > 100) then
! Complain about slow convergence
if (rank == 0) write(logf,*) 'Multiple sources not converging'
exit
endif
endif
! Save current value of mean ionization fraction
prev_sum_xHII = current_sum_xHII
! Iteration loop counter
iteration_counter = iteration_counter+1
call total_rate_by_all_source (dt)
if (rank == 0) then
call system_clock(wallclock2,countspersec)
! Write iteration dump if more than 15 minutes have passed.
! system_clock starts counting at 0 when it reaches
! a max value. To catch this, test also for negative
! values of wallclock2-wallclock1
write(logf,*) "Time and limit are: ", &
wallclock2-wallclock1, 15.0*60.0*countspersec
if (wallclock2-wallclock1 > 15*60*countspersec .or. &
wallclock2-wallclock1 < 0 ) then
call write_iteration_dump(iteration_counter)
wallclock1=wallclock2
endif
endif
call evolution_of_grid (convergence_failure,dt)
! Report time
if (rank == 0) write(timefile,"(A,I3,A,F8.1)") &
"Time after iteration ",iteration_counter," : ", timestamp_wallclock ()
enddo
! Calculate photon statistics
call calculate_photon_statistics (dt,xHI_array,xHII_array,intermediate_average_xHI,intermediate_average_xHII)
call report_photonstatistics (dt)
call update_grandtotal_photonstatistics (dt)
end subroutine evolve3D
! ===========================================================================
subroutine write_iteration_dump (iteration_counter)
integer,intent(in) :: iteration_counter ! iteration counter
integer :: ndump=0
character(len=20) :: iterfile
! Report time
write(timefile,"(A,F8.1)") &
"Time before writing iterdump: ", timestamp_wallclock ()
ndump=ndump+1
if (mod(ndump,2) == 0) then
iterfile="iterdump2.bin"
else
iterfile="iterdump1.bin"
endif
open(unit=iterdump,file=iterfile,form="unformatted", &
status="unknown")
write(iterdump) iteration_counter,prev_sum_xHII
write(iterdump) photon_loss_all
write(iterdump) photoionization_array
write(iterdump) heating_array
write(iterdump) intermediate_average_xHI
write(iterdump) intermediate_average_xHII
write(iterdump) intermediate_end_xHI
write(iterdump) intermediate_end_xHII
write(iterdump) intermediate_average_temperature
write(iterdump) intermediate_end_temperature
close(iterdump)
! Report time
write(timefile,"(A,F8.1)") "Time after writing iterdump: ", timestamp_wallclock ()
end subroutine write_iteration_dump
! ===========================================================================
subroutine start_from_dump(restart,iteration_counter)
integer,intent(in) :: restart ! restart flag
integer,intent(out) :: iteration_counter ! iteration counter
character(len=20) :: iterfile
#ifdef MPI
integer :: mympierror
#endif
if (restart == 0) then
if (rank == 0) &
write(logf,*) "Warning: start_from_dump called incorrectly"
else
if (rank == 0) then
! Report time
write(timefile,"(A,F8.1)") "Time before reading iterdump: ", timestamp_wallclock ()
! Set file to read (depending on restart flag)
select case (restart)
case (1)
iterfile="iterdump1.bin"
case (2)
iterfile="iterdump2.bin"
case (3)
iterfile="iterdump.bin"
end select
open(unit=iterdump,file=iterfile,form="unformatted",status="old")
read(iterdump) iteration_counter,prev_sum_xHII
read(iterdump) photon_loss_all
read(iterdump) photoionization_array
read(iterdump) heating_array
read(iterdump) intermediate_average_xHI
read(iterdump) intermediate_average_xHII
read(iterdump) intermediate_end_xHI
read(iterdump) intermediate_end_xHII
read(iterdump) intermediate_average_temperature
read(iterdump) intermediate_end_temperature
close(iterdump)
write(logf,*) "Read iteration ",iteration_counter," from dump file"
write(logf,*) 'photon loss counter: ',photon_loss_all
write(logf,*) "Intermediate result for mean ionization fraction: ", &
sum(intermediate_end_xHII(:,:,:))/real(mesh(1)*mesh(2)*mesh(3))
endif
#ifdef MPI
! Distribute the input parameters to the other nodes
call MPI_BCAST(iteration_counter,1, &
MPI_INTEGER,0,MPI_COMM_NEW,mympierror)
call MPI_BCAST(photon_loss_all,NumFreqBnd, &
MPI_DOUBLE_PRECISION,0,MPI_COMM_NEW,mympierror)
call MPI_BCAST(photoionization_array,mesh(1)*mesh(2)*mesh(3), &
MPI_DOUBLE_PRECISION,0,MPI_COMM_NEW,mympierror)
call MPI_BCAST(heating_array,mesh(1)*mesh(2)*mesh(3), &
MPI_DOUBLE_PRECISION,0,MPI_COMM_NEW,mympierror)
call MPI_BCAST(intermediate_average_xHI,mesh(1)*mesh(2)*mesh(3), &
MPI_DOUBLE_PRECISION,0,MPI_COMM_NEW,mympierror)
call MPI_BCAST(intermediate_average_xHII,mesh(1)*mesh(2)*mesh(3), &
MPI_DOUBLE_PRECISION,0,MPI_COMM_NEW,mympierror)
call MPI_BCAST(intermediate_end_xHI,mesh(1)*mesh(2)*mesh(3), &
MPI_DOUBLE_PRECISION,0,&
MPI_COMM_NEW,mympierror)
call MPI_BCAST(intermediate_end_xHII,mesh(1)*mesh(2)*mesh(3), &
MPI_DOUBLE_PRECISION,0,&
MPI_COMM_NEW,mympierror)
call MPI_BCAST(intermediate_average_temperature,mesh(1)*mesh(2)*mesh(3), &
MPI_DOUBLE_PRECISION,0,&
MPI_COMM_NEW,mympierror)
call MPI_BCAST(intermediate_end_temperature,mesh(1)*mesh(2)*mesh(3), &
MPI_DOUBLE_PRECISION,0,&
MPI_COMM_NEW,mympierror)
#endif
! Report time
write(timefile,"(A,F8.1)") &
"Time after reading iterdump: ", timestamp_wallclock ()
endif
end subroutine start_from_dump
! ===========================================================================
subroutine total_rate_by_all_source(dt)
! For random permutation of sources:
use m_ctrper, only: ctrper
real(kind=dp),intent(in) :: dt !< time step, passed on to evolve0D
real(kind=dp) :: LLS_loss_all
#ifdef MPI
integer :: mympierror
#endif
if (rank == 0) write(logf,*) 'Doing all sources '
! reset global rates to zero for this iteration
photoionization_array(:,:,:) = 0.0
heating_array(:,:,:) = 0.0
! reset photon loss counters
photon_loss(:) = 0.0
LLS_loss = 0.0 ! make this a NumFreqBnd vector if needed later (GM/101129)
! Make a randomized list of sources :: call in serial
! disabled / GM110512
!if ( rank == 0 ) call ctrper (SrcSeries(1:NumSrc),1.0)
#ifdef MPI
! Distribute the source list to the other nodes
! disabled / GM110512
!call MPI_BCAST(SrcSeries,NumSrc,MPI_INTEGER,0,MPI_COMM_NEW,mympierror)
#endif
! Ray trace the whole grid for all sources.
! We can do this in two ways, depending on
! the number of processors. For many processors
! the master-slave setup should be more efficient.
if (npr > min_numproc_master_slave) then
call do_grid_master_slave (dt)
else
call do_grid_static (dt)
endif
#ifdef MPI
! accumulate (sum) the MPI distributed photon losses
call MPI_ALLREDUCE(photon_loss, photon_loss_all, NumFreqBnd, &
MPI_DOUBLE_PRECISION, MPI_SUM, MPI_COMM_NEW, mympierror)
! accumulate (sum) the MPI distributed photon losses
call MPI_ALLREDUCE(LLS_loss, LLS_loss_all, 1, &
MPI_DOUBLE_PRECISION, MPI_SUM, MPI_COMM_NEW, mympierror)
! Put LLS_loss_all back in the LLS variable
LLS_loss = LLS_loss_all
! accumulate (sum) the MPI distributed photoionization_array
call MPI_ALLREDUCE(photoionization_array, buffer, mesh(1)*mesh(2)*mesh(3), &
MPI_DOUBLE_PRECISION, MPI_SUM, MPI_COMM_NEW, mympierror)
! Overwrite the processor local values with the accumulated value
photoionization_array(:,:,:) = buffer(:,:,:)
! accumulate (sum) the MPI distributed heating_array
call MPI_ALLREDUCE(heating_array, buffer, mesh(1)*mesh(2)*mesh(3), &
MPI_DOUBLE_PRECISION, MPI_SUM, MPI_COMM_NEW, mympierror)
! Overwrite the processor local values with the accumulated value
heating_array(:,:,:) = buffer(:,:,:)
photon_loss_all(:) = photon_loss(:)
#endif
end subroutine total_rate_by_all_source
! ===========================================================================
subroutine evolution_of_grid (convergence_failure,dt)
! Flag variable (passed back from evolution_of_cell)
integer,intent(out) :: convergence_failure
real(kind=dp),intent(in) :: dt !< time step, passed on to evolve0D
integer :: i,j,k ! mesh position
! Mesh position of the cell being treated
integer,dimension(Ndim) :: pos
character(len=40) :: file1
! Report photon losses over grid boundary
if (rank == 0) write(logf,*) 'photon loss counter: ',photon_loss_all(:)
! Turn total photon loss into a mean per cell (used in evolution_of_cell)
! GM/110225: Possibly this should be
! photon_loss_all(:)/(real(mesh(1))*real(mesh(2))
! Since this is the correct answer for an optically thin cell_volume
! Compromise: photon_loss_all(:)/(real(mesh(1))**3)*sum(xh_av(:,:,:,1))
! then if the box is fully ionized the optically thin 1/N^2 is used
! and if the box is more neutral something close to 1/N^3 is used.
! Not sure
photon_loss(:)=photon_loss_all(:)/(real(mesh(1))*real(mesh(2))*real(mesh(3)))
! Report minimum value of xh_av(0) to check for zeros
if (rank == 0) then
write(logf,*) "min xh_av(0): ",minval(intermediate_average_xHI(:,:,:))
endif
! Apply total photo-ionization rates from all sources (photoionization_array)
convergence_failure = 0 ! will be used to check for convergence
! Loop through the entire mesh
if (rank == 0) write(logf,*) 'Doing global '
do k = 1,mesh(3)
do j = 1,mesh(2)
do i = 1,mesh(1)
pos = (/ i,j,k /)
call evolution_of_cell(dt,pos,convergence_failure)
enddo
enddo
enddo
! Report on convergence and intermediate result
if (rank == 0) then
write(logf,*) "Number of non-converged points: ",convergence_failure
write(logf,*) "Intermediate result for mean H ionization fraction: ", &
sum(intermediate_end_xHII(:,:,:))/real(mesh(1)*mesh(2)*mesh(3))
endif
! Report on photon conservation
call calculate_photon_statistics (dt,intermediate_end_xHI,intermediate_end_xHII, &
intermediate_average_xHI,intermediate_average_xHII)
call report_photonstatistics (dt)
end subroutine evolution_of_grid
! ===========================================================================
!> Ray tracing the entire grid for all the sources using the
!! master-slave model for distributing the sources over the
!! MPI processes.
subroutine do_grid_master_slave (dt)
! Ray tracing the entire grid for all the sources using the
! master-slave model for distributing the sources over the
! MPI processes.
real(kind=dp),intent(in) :: dt !< time step, passed on to evolve0D
if (rank == 0) then
call do_grid_master()
else
call do_grid_slave (dt)
endif
end subroutine do_grid_master_slave
! ===========================================================================
!> The master task in the master-slave setup for distributing
!! the ray-tracing over the sources over the MPI processes.
subroutine do_grid_master ()
! The master task in the master-slave setup for distributing
! the ray-tracing over the sources over the MPI processes.
integer :: source_index
integer :: sources_done,whomax,who,answer
! counter for master-slave process
integer,dimension(:),allocatable :: counts
#ifdef MPI
integer :: mympierror
#endif
#ifdef MPI
! Source Loop - Master Slave with rank=0 as Master
sources_done = 0
source_index = 0
! Allocate counter for master-slave process
if (.not.(allocated(counts))) allocate(counts(0:npr-1))
! send tasks to slaves
whomax = min(NumSrc,npr-1)
do who = 1,whomax
if (source_index <= NumSrc) then
source_index=source_index+1
call MPI_Send (source_index, 1, MPI_INTEGER, who, 1, &
MPI_COMM_NEW, mympierror)
endif
enddo
do while (sources_done < NumSrc)
! wait for an answer from a slave.
call MPI_Recv (answer, & ! address of receive buffer
1, & ! number of items to receive
MPI_INTEGER, & ! type of data
MPI_ANY_SOURCE, & ! can receive from any other
1, & ! tag
MPI_COMM_NEW, & ! communicator
mympi_status, & ! status
mympierror)
who = mympi_status(MPI_SOURCE) ! find out who sent us the answer
sources_done = sources_done+1 ! and the number of sources done
! put the slave on work again,
! but only if not all tasks have been sent.
! we use the value of num to detect this */
if (source_index < NumSrc) then
source_index = source_index+1
call MPI_Send (source_index, 1, MPI_INTEGER, &
who, &
1, &
MPI_COMM_NEW, &
mympierror)
endif
enddo
! Now master sends a message to the slaves to signify that they
! should end the calculations. We use a special tag for that:
do who = 1,npr-1
call MPI_Send (0, 1, MPI_INTEGER, &
who, &
2, & ! tag
MPI_COMM_NEW, &
mympierror)
! the slave will send to master the number of calculations
! that have been performed.
! We put this number in the counts array.
call MPI_Recv (counts(who), & ! address of receive buffer
1, & ! number of items to receive
MPI_INTEGER, & ! type of data
who, & ! receive from process who
7, & ! tag
MPI_COMM_NEW, & ! communicator
mympi_status, & ! status
mympierror)
enddo
write(logf,*) 'Mean number of sources per processor: ', real(NumSrc)/real(npr-1)
write(logf,*) 'Counted mean number of sources per processor: ', real(sum(counts(1:npr-1)))/real(npr-1)
write(logf,*) 'Minimum and maximum number of sources ', 'per processor: ', &
minval(counts(1:npr-1)),maxval(counts(1:npr-1))
flush(logf)
#endif
end subroutine do_grid_master
! ===========================================================================
!> The slave task in the master-slave setup for distributing
!! the ray-tracing over the sources over the MPI processes.
subroutine do_grid_slave(dt)
! The slave task in the master-slave setup for distributing
! the ray-tracing over the sources over the MPI processes.
real(kind=dp),intent(in) :: dt !< time step, passed on to evolve0D
integer :: local_count
integer :: source_index
#ifdef MPI
integer :: mympierror
#endif
#ifdef MPI
local_count = 0
call MPI_Recv (source_index, & ! address of receive buffer
1, & ! number of items to receive
MPI_INTEGER, & ! type of data
0, & ! can receive from master only
MPI_ANY_TAG, & ! can expect two values, so
! we use the wildcard MPI_ANY_TAG
! here
MPI_COMM_NEW, & ! communicator
mympi_status, & ! status
mympierror)
! if tag equals 2, then skip the calculations
if (mympi_status(MPI_TAG) /= 2) then
do
#ifdef MPILOG
! Report
write(logf,*) 'Processor ',rank,' received: ',source_index
write(logf,*) ' that is source ',source_index !SrcSeries(source_index)
write(logf,*) ' at:',srcpos(:,source_index)
flush(logf)
#endif
! Do the source at hand
call do_source(dt,source_index)
! Update local counter
local_count = local_count+1
#ifdef MPILOG
! Report ionization fractions
! strange to report ionization fractiosn at this point
!write(logf,*) sum(intermediate_end_xHII(:,:,:))/real(mesh(1)*mesh(2)*mesh(3))
!write(logf,*) sum(intermediate_average_xHII(:,:,:))/real(mesh(1)*mesh(2)*mesh(3))
!write(logf,*) local_count
#endif
! Send 'answer'
call MPI_Send (local_count, 1, & ! sending one int
MPI_INTEGER, 0, & ! to master
1, & ! tag
MPI_COMM_NEW, & ! communicator
mympierror)
! Receive new source number
call MPI_Recv (source_index, & ! address of receive buffer
1, & ! number of items to receive
MPI_INTEGER, & ! type of data
0, & ! can receive from master only
MPI_ANY_TAG, & ! can expect two values, so
! we use the wildcard MPI_ANY_TAG
! here
MPI_COMM_NEW, & ! communicator
mympi_status, & ! status
mympierror)
! leave this loop if tag equals 2
if (mympi_status(MPI_TAG) == 2) then
#ifdef MPILOG
write(logf,*) 'Stop received'
flush(logf)
#endif
exit
endif
enddo
endif
! this is the point that is reached when a task is received with
! tag = 2
! send the number of calculations to master and return
#ifdef MPILOG
! Report
write(logf,*) 'Processor ',rank,' did ',local_count,' sources'
flush(logf)
#endif
call MPI_Send (local_count, &
1, &
MPI_INTEGER, & ! sending one int
0, & ! to master
7, & ! tag
MPI_COMM_NEW,& ! communicator
mympierror)
#endif
end subroutine do_grid_slave
! ===========================================================================
!> Does the ray-tracing over the sources by distributing
!! the sources evenly over the available MPI processes-
subroutine do_grid_static (dt)
! Does the ray-tracing over the sources by distributing
! the sources evenly over the available MPI processes-
real(kind=dp),intent(in) :: dt !< time step, passed on to evolve0D
integer :: source_index
! Source Loop - distributed for the MPI nodes
do source_index=1+rank,NumSrc,npr
call do_source(dt,source_index)
enddo
end subroutine do_grid_static
! ===========================================================================
!> Does the ray-tracing over the entire 3D grid for one source.
!! The number of this source in the current list is source_index.
subroutine do_source(dt,source_index)
! Does the ray-tracing over the entire 3D grid for one source.
! The number of this source in the current list is source_index.
real(kind=dp),intent(in) :: dt !< time step, passed on to evolve0D
integer, intent(in) :: source_index !< number of the source being done
integer :: i_axis,i_plane,i_quadrant
integer :: i,j,k
integer :: nbox
integer :: nnt
! Mesh position of the cell being treated
integer,dimension(Ndim) :: ray_traced_pos
character(len=40) :: file1
! reset column densities for new source point
! coldensh_out is unique for each source point
coldensh_out(:,:,:) = 0.0
! Find the mesh position for the end points of the loop
! We trace until we reach max_subbox (set in c2ray_parameters)
! or the end of the grid. In the periodic case the end of the
! grid is always mesh/2 away from the source. If the grid is
! even-sized we trave mesh/2 cells to the left and mesh/2-1
! cell to the right. If it is odd, it is mesh/2 in either direction.
! The mod(mesh,2) takes care of handling this.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! this thing need to be changed in adaptive method
if (periodic_bc) then
last_r(:) = srcpos(:,source_index)+mesh(:)/2-1+mod(mesh(:),2)
last_l(:) = srcpos(:,source_index)-mesh(:)/2
else
last_r(:) = min(srcpos(:,source_index)+max_subbox,mesh(:))
last_l(:) = max(srcpos(:,source_index)-max_subbox,1)
endif
! Loop through grid in the order required by
! short characteristics
! Transfer is done in a set of cubes of increasing size.
! If the HII region is small we do not waste time calculating
! column densities of parts of the grid where no radiation
! penetrates. To test whether the current subbox is large
! enough we use the photon_loss_src. If this is non-zero,
! photons are leaving this subbox and we need to do another
! one. We also stop once we have done the whole grid.
!nbox=0 ! subbox counter
!photon_loss_src(:)=NormFlux(source_index)*S_star_nominal !-1.0 ! to pass the first while test
!last_r(:)=srcpos(:,source_index) ! to pass the first while test
!last_l(:)=srcpos(:,source_index) ! to pass the first while test
photon_loss_src(:) = 0.0 ! reset photon_loss_src to zero
photon_loss_src_thread(:,:) = 0.0 ! reset photon_loss_src to zero
! First do source point (on first pass)
ray_traced_pos(:) = srcpos(:,source_index)
call get_rate(dt,ray_traced_pos,source_index)
! do independent areas of the mesh in parallel using OpenMP
!$omp parallel default(shared) private(tn)
!!!reduction(+:photon_loss_src)
! Find out your thread number
#ifdef MY_OPENMP
tn = omp_get_thread_num()+1
#else
tn = 1
#endif
! Then do the the axes
!$omp do schedule(dynamic,1)
do i_axis = 1,6
call ray_trace_1D_axis(dt,source_index,i_axis)
enddo
!$omp end do
! Then the source planes
!$omp do schedule (dynamic,1)
do i_plane = 1,12
call ray_trace_2D_plane(dt,source_index,i_plane)
end do
!$omp end do
! Then the quadrants
!$omp do schedule (dynamic,1)
do i_quadrant = 1,8
call ray_trace_3D_quadrant(dt,source_index,i_quadrant)
end do
!$omp end do
!$omp end parallel
! Collect photon losses for each thread
do nnt=1,nthreads
photon_loss_src(:) = photon_loss_src(:) + photon_loss_src_thread(:,nnt)
enddo
! Record the final photon loss, this is the photon loss that leaves
! the grid.
photon_loss(:) = photon_loss(:) + photon_loss_src(:)
end subroutine do_source
! ===========================================================================
! Ray tracing for the axes going through the source point
! should be called after having done the source point
subroutine ray_trace_1D_axis(dt,source_index,i_axis)
real(kind=dp),intent(in) :: dt ! passed on to get_rate
integer,intent(in) :: source_index ! current source
integer,intent(in) :: i_axis ! axis to do
integer :: i,j,k
integer,dimension(Ndim) :: ray_traced_pos ! mesh position
select case (i_axis)
case(1)
! sweep in +i direction
ray_traced_pos(2:3)=srcpos(2:3,source_index)
do i=srcpos(1,source_index)+1,last_r(1)
ray_traced_pos(1)=i
call get_rate(dt,ray_traced_pos,source_index) !# `positive' i
enddo
case(2)
! sweep in -i direction
ray_traced_pos(2:3)=srcpos(2:3,source_index)
do i=srcpos(1,source_index)-1,last_l(1),-1
ray_traced_pos(1)=i
call get_rate(dt,ray_traced_pos,source_index) !# `negative' i
end do
case(3)
! sweep in +j direction
ray_traced_pos(1)=srcpos(1,source_index)
ray_traced_pos(3)=srcpos(3,source_index)
do j=srcpos(2,source_index)+1,last_r(2)
ray_traced_pos(2)=j
call get_rate(dt,ray_traced_pos,source_index) !# `positive' j
end do
case(4)
! sweep in -j direction
ray_traced_pos(1)=srcpos(1,source_index)
ray_traced_pos(3)=srcpos(3,source_index)
do j=srcpos(2,source_index)-1,last_l(2),-1
ray_traced_pos(2)=j
call get_rate(dt,ray_traced_pos,source_index) !# `negative' j
end do
case(5)
! sweep in +k direction
ray_traced_pos(1:2)=srcpos(1:2,source_index)
do k=srcpos(3,source_index)+1,last_r(3)
ray_traced_pos(3)=k
call get_rate(dt,ray_traced_pos,source_index) !# `positive' k
end do
case(6)
! sweep in -k direction
ray_traced_pos(1:2)=srcpos(1:2,source_index)
do k=srcpos(3,source_index)-1,last_l(3),-1
ray_traced_pos(3)=k
call get_rate(dt,ray_traced_pos,source_index) !# `negative' k
end do
end select
end subroutine ray_trace_1D_axis
! ===========================================================================
!> Ray tracing for planes containing the source point
!! should be called after ray_trace_1D_axis
subroutine ray_trace_2D_plane(dt,source_index,i_plane)
! find column density for the axes going through the source point
! should be called after having done the source point
real(kind=dp),intent(in) :: dt ! passed on to get_rate
integer,intent(in) :: source_index ! current source
integer,intent(in) :: i_plane ! plane to do
integer :: i,j,k
integer,dimension(Ndim) :: ray_traced_pos ! mesh position
select case (i_plane)
case(1)
! sweep in +i,+j direction
ray_traced_pos(3)=srcpos(3,source_index)
do j=srcpos(2,source_index)+1,last_r(2)
ray_traced_pos(2)=j
do i=srcpos(1,source_index)+1,last_r(1)
ray_traced_pos(1)=i
call get_rate(dt,ray_traced_pos,source_index)
enddo
enddo
case(2)
! sweep in +i,-j direction
ray_traced_pos(3)=srcpos(3,source_index)
do j=srcpos(2,source_index)-1,last_l(2),-1
ray_traced_pos(2)=j
do i=srcpos(1,source_index)+1,last_r(1)
ray_traced_pos(1)=i
call get_rate(dt,ray_traced_pos,source_index)
enddo
enddo
case(3)