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mpi.f90
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MODULE mpi
USE parameters
IMPLICIT NONE
include 'mpif.h'
integer :: mype,size,ierror
integer :: status(MPI_STATUS_SIZE) !for mpitranspose...
integer :: tag_nlt = 123
integer :: tag_kzs = 124
integer :: tag_kzu = 125
integer :: tag_pzs = 126
integer :: tag_dz = 127
integer :: tag_kzs2 = 128
integer :: tag_kzu2 = 129
integer :: tag_pzs2 = 130
integer :: tag_r1 = 131
integer :: tag_r2 = 132
integer :: tag_p0 = 133
integer :: tag_slice_xz(nfields) = [141,142,143,144,145,146,147,148] !Up to 14X where X is the number of fields to slice
integer :: tag_slice_xz2(nfields2) = [1141,1142,1143,1144,1145,1146,1147,1148,1149] !Up to 114X where X is the number of fields to slice
integer :: tag_slice_xz3(nfields3) = [11141,11142,11143,11144,11145,11146,11147,11148] !Up to 114X where X is the number of fields to slice
integer :: tag_nzs = 151
integer :: tag_nzu = 152
integer :: tag_lzs = 153
integer :: tag_ezs = 154
integer :: tag_ezu = 155
integer :: tag_rzs = 156
integer :: tag_rzu = 157
integer :: tag_hb = 158
integer :: tag_hw = 159
integer :: tag_hb2 = 1582
integer :: tag_hw2 = 1592
integer :: tag_ns = 160
integer :: tag_us = 161
integer :: tag_vs = 162
integer :: tag_ws = 163
integer :: tag_ts = 164
integer :: tag_cond =165
integer :: tag_condwz=166
integer :: tag_psir=167
integer :: tag_psik=168
integer :: tag_cont = 169
integer :: tag_eta = 170
integer :: tag_eta2 = 171
integer :: tag_grow = 172
CONTAINS
SUBROUTINE initialize_mpi
call mpi_init(ierror)
call mpi_comm_size(mpi_comm_world,size,ierror)
call mpi_comm_rank(mpi_comm_world,mype,ierror)
! if (mype.eq.0) print*,'size = ',size
if (size.ne.npe) then
print*,size,npe,'Wrong number of processors!'
stop
end if
END SUBROUTINE initialize_mpi
SUBROUTINE kill_mpi
call mpi_finalize(ierror)
END SUBROUTINE kill_mpi
SUBROUTINE mpitranspose(x,d1,d2,d3p,xt,d3,d2p)
integer :: d1,d2,d3,d2p,d3p !I change the names to avoid confusion...
integer :: incr,j,k,ip,ito,ifrom,jblock,kblock,koff,n123p
double complex, dimension(d1,d2,d3p), intent(in) :: x
double complex, dimension(d1,d3,d2p), intent(out) :: xt
double complex, dimension(d1,d2p,d3p,npe) :: xsend,xrecv
n123p=d1*d2p*d3p
do ip=1,npe
do k=1,d3p
do j=1,d2p
jblock=j+(ip-1)*d2p
do incr=1,d1
xsend(incr,j,k,ip) = x(incr,jblock,k)
enddo
enddo
enddo
enddo
call mpi_alltoall(xsend,n123p,MPI_DOUBLE_COMPLEX,xrecv,n123p,MPI_DOUBLE_COMPLEX,MPI_COMM_WORLD,ierror)
do ip=1,npe
do j=1,d2p
do k=1,d3p
do incr=1,d1
xt(incr,k+(ip-1)*d3p,j) = xrecv(incr,j,k,ip)
enddo
enddo
enddo
enddo
END SUBROUTINE mpitranspose
SUBROUTINE generate_halo(uk,vk,wk,tk)
!This subroutine distributes the data to create the proper halo for velocity fields. On the input, fields are also n3h2, but the values in the halo (first and last 2 levels) are insignificant.
!The way it proceeds is that it first save the 2 first and last significant levels for each processor on a chunk (chun_send_..._...). This chunk will become the previous and next processor's new top and bottom halo.
!So first, the even taged (mype 0, 2, 4 ...) processor send both of their chunk (execpt for mype 0 and npe-1 that respectively just send their top and bottom) to the right (previous or next) processor.
!Then, we do the inverse: odd processors (mype = 1, 3, ...) send their chunk to the even ones.
!This subroutine is based on the fact that the number of processors is even and that n3h0 is at least 2, and must be modified otherwise.
integer :: prev,next,tag
integer :: nrec,maxrec
integer :: ikx,iky,incrz
integer :: chunksize
integer, parameter :: tag_u=1,tag_v=2,tag_w=3,tag_t=4
double complex, dimension(iktx,ikty,2) :: chunk_send_bot_u,chunk_send_top_u,chunk_send_bot_v,chunk_send_top_v,chunk_send_bot_w,chunk_send_top_w,chunk_send_bot_t,chunk_send_top_t
double complex, dimension(iktx,ikty,2) :: chunk_recv_u,chunk_recv_v,chunk_recv_w,chunk_recv_t
double complex, dimension(iktx,ikty,n3h2), intent(inout) :: uk,vk,wk,tk
!maxsend is the number of processors from which mype receives velocity fields
if(mype==0) then
maxrec=1
elseif(mype==(npe-1)) then
maxrec=1
else
maxrec=2
end if
!Send to which processor
prev=mype-1
next=mype+1
!Create the chunks to send
do ikx=1,iktx
do iky=1,ikty
do incrz=1,2
if(mype/=0) then
chunk_send_bot_u(ikx,iky,3-incrz)=uk(ikx,iky,2+incrz)
chunk_send_bot_v(ikx,iky,3-incrz)=vk(ikx,iky,2+incrz)
chunk_send_bot_w(ikx,iky,3-incrz)=wk(ikx,iky,2+incrz)
chunk_send_bot_t(ikx,iky,3-incrz)=tk(ikx,iky,2+incrz)
end if
if(mype/=(npe-1)) then
chunk_send_top_u(ikx,iky,3-incrz)=uk(ikx,iky,n3h0+3-incrz)
chunk_send_top_v(ikx,iky,3-incrz)=vk(ikx,iky,n3h0+3-incrz)
chunk_send_top_w(ikx,iky,3-incrz)=wk(ikx,iky,n3h0+3-incrz)
chunk_send_top_t(ikx,iky,3-incrz)=tk(ikx,iky,n3h0+3-incrz)
end if
end do
end do
end do
chunksize=iktx*ikty*2
!Even processors send their chunks
if(mod( (mype+2),2)==0) then
if(mype/=0) then
call mpi_send(chunk_send_bot_u,chunksize,MPI_DOUBLE_COMPLEX,prev,tag_u,MPI_COMM_WORLD,ierror)
call mpi_send(chunk_send_bot_v,chunksize,MPI_DOUBLE_COMPLEX,prev,tag_v,MPI_COMM_WORLD,ierror)
call mpi_send(chunk_send_bot_w,chunksize,MPI_DOUBLE_COMPLEX,prev,tag_w,MPI_COMM_WORLD,ierror)
call mpi_send(chunk_send_bot_t,chunksize,MPI_DOUBLE_COMPLEX,prev,tag_t,MPI_COMM_WORLD,ierror)
end if
call mpi_send(chunk_send_top_u,chunksize,MPI_DOUBLE_COMPLEX,next,tag_u,MPI_COMM_WORLD,ierror)
call mpi_send(chunk_send_top_v,chunksize,MPI_DOUBLE_COMPLEX,next,tag_v,MPI_COMM_WORLD,ierror)
call mpi_send(chunk_send_top_w,chunksize,MPI_DOUBLE_COMPLEX,next,tag_w,MPI_COMM_WORLD,ierror)
call mpi_send(chunk_send_top_t,chunksize,MPI_DOUBLE_COMPLEX,next,tag_t,MPI_COMM_WORLD,ierror)
else
!Odd processors receive chunks from the even ones
do nrec=1,maxrec
call mpi_recv(chunk_recv_u,chunksize,MPI_DOUBLE_COMPLEX,MPI_ANY_SOURCE,tag_u,MPI_COMM_WORLD,status,ierror)
call mpi_recv(chunk_recv_v,chunksize,MPI_DOUBLE_COMPLEX,MPI_ANY_SOURCE,tag_v,MPI_COMM_WORLD,status,ierror)
call mpi_recv(chunk_recv_w,chunksize,MPI_DOUBLE_COMPLEX,MPI_ANY_SOURCE,tag_w,MPI_COMM_WORLD,status,ierror)
call mpi_recv(chunk_recv_t,chunksize,MPI_DOUBLE_COMPLEX,MPI_ANY_SOURCE,tag_t,MPI_COMM_WORLD,status,ierror)
if(status(MPI_SOURCE)==next) then
do ikx=1,iktx
do iky=1,ikty
do incrz=1,2
uk(ikx,iky,n3h2+1-incrz)=chunk_recv_u(ikx,iky,incrz)
vk(ikx,iky,n3h2+1-incrz)=chunk_recv_v(ikx,iky,incrz)
wk(ikx,iky,n3h2+1-incrz)=chunk_recv_w(ikx,iky,incrz)
tk(ikx,iky,n3h2+1-incrz)=chunk_recv_t(ikx,iky,incrz)
end do
end do
end do
elseif(status(MPI_SOURCE)==prev) then
do ikx=1,iktx
do iky=1,ikty
do incrz=1,2
uk(ikx,iky,incrz)=chunk_recv_u(ikx,iky,incrz)
vk(ikx,iky,incrz)=chunk_recv_v(ikx,iky,incrz)
wk(ikx,iky,incrz)=chunk_recv_w(ikx,iky,incrz)
tk(ikx,iky,incrz)=chunk_recv_t(ikx,iky,incrz)
end do
end do
end do
else
write(*,*) "There is a tag/source mismatch in mype=",mype
end if
end do
end if
!Now, the inverse, odd processors send their chunks
if(mod( (mype+2),2)/=0) then
call mpi_send(chunk_send_bot_u,chunksize,MPI_DOUBLE_COMPLEX,prev,tag_u,MPI_COMM_WORLD,ierror)
call mpi_send(chunk_send_bot_v,chunksize,MPI_DOUBLE_COMPLEX,prev,tag_v,MPI_COMM_WORLD,ierror)
call mpi_send(chunk_send_bot_w,chunksize,MPI_DOUBLE_COMPLEX,prev,tag_w,MPI_COMM_WORLD,ierror)
call mpi_send(chunk_send_bot_t,chunksize,MPI_DOUBLE_COMPLEX,prev,tag_t,MPI_COMM_WORLD,ierror)
if(mype/=(npe-1)) then
call mpi_send(chunk_send_top_u,chunksize,MPI_DOUBLE_COMPLEX,next,tag_u,MPI_COMM_WORLD,ierror)
call mpi_send(chunk_send_top_v,chunksize,MPI_DOUBLE_COMPLEX,next,tag_v,MPI_COMM_WORLD,ierror)
call mpi_send(chunk_send_top_w,chunksize,MPI_DOUBLE_COMPLEX,next,tag_w,MPI_COMM_WORLD,ierror)
call mpi_send(chunk_send_top_t,chunksize,MPI_DOUBLE_COMPLEX,next,tag_t,MPI_COMM_WORLD,ierror)
end if
else
!And even ones receive chunks from odds
do nrec=1,maxrec
call mpi_recv(chunk_recv_u,chunksize,MPI_DOUBLE_COMPLEX,MPI_ANY_SOURCE,tag_u,MPI_COMM_WORLD,status,ierror)
call mpi_recv(chunk_recv_v,chunksize,MPI_DOUBLE_COMPLEX,MPI_ANY_SOURCE,tag_v,MPI_COMM_WORLD,status,ierror)
call mpi_recv(chunk_recv_w,chunksize,MPI_DOUBLE_COMPLEX,MPI_ANY_SOURCE,tag_w,MPI_COMM_WORLD,status,ierror)
call mpi_recv(chunk_recv_t,chunksize,MPI_DOUBLE_COMPLEX,MPI_ANY_SOURCE,tag_t,MPI_COMM_WORLD,status,ierror)
if(status(MPI_SOURCE)==next) then
do ikx=1,iktx
do iky=1,ikty
do incrz=1,2
uk(ikx,iky,n3h2+1-incrz)=chunk_recv_u(ikx,iky,incrz)
vk(ikx,iky,n3h2+1-incrz)=chunk_recv_v(ikx,iky,incrz)
wk(ikx,iky,n3h2+1-incrz)=chunk_recv_w(ikx,iky,incrz)
tk(ikx,iky,n3h2+1-incrz)=chunk_recv_t(ikx,iky,incrz)
end do
end do
end do
elseif(status(MPI_SOURCE)==prev) then
do ikx=1,iktx
do iky=1,ikty
do incrz=1,2
uk(ikx,iky,incrz)=chunk_recv_u(ikx,iky,incrz)
vk(ikx,iky,incrz)=chunk_recv_v(ikx,iky,incrz)
wk(ikx,iky,incrz)=chunk_recv_w(ikx,iky,incrz)
tk(ikx,iky,incrz)=chunk_recv_t(ikx,iky,incrz)
end do
end do
end do
else
write(*,*) "There is a tag/source mismatch in mype=",mype
end if
end do
end if
END SUBROUTINE generate_halo
SUBROUTINE generate_halo_q(qk)
!This subroutine distributes the data to create the proper halo for qk. On the input, q is also n3h1, but the values in the halo (first and last levels) are insignificant.
!The way it proceeds is that it first save the first and last significant levels for each processor on a chunk (chun_send_..._...). This chunk will become the previous and next processor's new top and bottom halo.
!So first, the even taged (mype 0, 2, 4 ...) processor send both of their chunk (execpt for mype 0 and npe-1 that respectively just send their top and bottom) to the right (previous or next) processor.
!Then, we do the inverse: odd processors (mype = 1, 3, ...) send their chunk to the even ones.
!This subroutine is based on the fact that the number of processors is even and that n3h0 is at least 2, and must be modified otherwise.
integer :: prev,next,tag
integer :: nrec,maxrec
integer :: ikx,iky,incrz
integer :: chunksize
integer, parameter :: tag_q=5
double complex, dimension(iktx,ikty) :: chunk_send_bot_q,chunk_send_top_q
double complex, dimension(iktx,ikty) :: chunk_recv_q
double complex, dimension(iktx,ikty,n3h1), intent(inout) :: qk
!maxsend is the number of processors from which mype receives velocity fields
if(mype==0) then
maxrec=1
elseif(mype==(npe-1)) then
maxrec=1
else
maxrec=2
end if
!Send to which processor
prev=mype-1
next=mype+1
!Create the chunks to send
do ikx=1,iktx
do iky=1,ikty
if(mype/=0) then
chunk_send_bot_q(ikx,iky)=qk(ikx,iky,2)
end if
if(mype/=(npe-1)) then
chunk_send_top_q(ikx,iky)=qk(ikx,iky,n3h0+1)
end if
end do
end do
chunksize=iktx*ikty
!Even processors send their chunks
if(mod( (mype+2),2)==0) then
if(mype/=0) then
call mpi_send(chunk_send_bot_q,chunksize,MPI_DOUBLE_COMPLEX,prev,tag_q,MPI_COMM_WORLD,ierror)
end if
call mpi_send(chunk_send_top_q,chunksize,MPI_DOUBLE_COMPLEX,next,tag_q,MPI_COMM_WORLD,ierror)
else
!Odd processors receive chunks from the even ones
do nrec=1,maxrec
call mpi_recv(chunk_recv_q,chunksize,MPI_DOUBLE_COMPLEX,MPI_ANY_SOURCE,tag_q,MPI_COMM_WORLD,status,ierror)
if(status(MPI_SOURCE)==next) then
do ikx=1,iktx
do iky=1,ikty
qk(ikx,iky,n3h1)=chunk_recv_q(ikx,iky)
end do
end do
elseif(status(MPI_SOURCE)==prev) then
do ikx=1,iktx
do iky=1,ikty
qk(ikx,iky,1)=chunk_recv_q(ikx,iky)
end do
end do
else
write(*,*) "There is a tag/source mismatch in mype=",mype
end if
end do
end if
!Now, the inverse, odd processors send their chunks
if(mod( (mype+2),2)/=0) then
call mpi_send(chunk_send_bot_q,chunksize,MPI_DOUBLE_COMPLEX,prev,tag_q,MPI_COMM_WORLD,ierror)
if(mype/=(npe-1)) then
call mpi_send(chunk_send_top_q,chunksize,MPI_DOUBLE_COMPLEX,next,tag_q,MPI_COMM_WORLD,ierror)
end if
else
!And even ones receive chunks from odds
do nrec=1,maxrec
call mpi_recv(chunk_recv_q,chunksize,MPI_DOUBLE_COMPLEX,MPI_ANY_SOURCE,tag_q,MPI_COMM_WORLD,status,ierror)
if(status(MPI_SOURCE)==next) then
do ikx=1,iktx
do iky=1,ikty
qk(ikx,iky,n3h1)=chunk_recv_q(ikx,iky)
end do
end do
elseif(status(MPI_SOURCE)==prev) then
do ikx=1,iktx
do iky=1,ikty
qk(ikx,iky,1)=chunk_recv_q(ikx,iky)
end do
end do
else
write(*,*) "There is a tag/source mismatch in mype=",mype
end if
end do
end if
END SUBROUTINE generate_halo_q
END MODULE mpi