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clover.f90
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clover.f90
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!Crown Copyright 2012 AWE.
!
! This file is part of CloverLeaf.
!
! CloverLeaf is free software: you can redistribute it and/or modify it under
! the terms of the GNU General Public License as published by the
! Free Software Foundation, either version 3 of the License, or (at your option)
! any later version.
!
! CloverLeaf is distributed in the hope that it will be useful, but
! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
! FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
! details.
!
! You should have received a copy of the GNU General Public License along with
! CloverLeaf. If not, see http://www.gnu.org/licenses/.
!> @brief Communication Utilities
!> @author Wayne Gaudin
!> @details Contains all utilities required to run CloverLeaf in a distributed
!> environment, including initialisation, mesh decompostion, reductions and
!> halo exchange using explicit buffers.
!>
!> Note the halo exchange is currently coded as simply as possible and no
!> optimisations have been implemented, such as post receives before sends or packing
!> buffers with multiple data fields. This is intentional so the effect of these
!> optimisations can be measured on large systems, as and when they are added.
!>
!> Even without these modifications CloverLeaf weak scales well on moderately sized
!> systems of the order of 10K cores.
MODULE clover_module
USE data_module
USE definitions_module
USE MPI
USE iso_c_binding
USE mpi_interface
IMPLICIT NONE
CONTAINS
SUBROUTINE clover_barrier
integer(c_int) :: err
CALL my_MPI_Barrier(MPI_COMM_WORLD,err)
END SUBROUTINE clover_barrier
SUBROUTINE clover_abort
integer(c_int) :: ierr,err
CALL my_MPI_Abort(MPI_COMM_WORLD,ierr,err)
END SUBROUTINE clover_abort
SUBROUTINE clover_finalize
integer(c_int) :: err
CLOSE(g_out)
CALL FLUSH(0)
CALL FLUSH(6)
CALL FLUSH(g_out)
CALL MPI_FINALIZE(err)
END SUBROUTINE clover_finalize
SUBROUTINE clover_init_comms
IMPLICIT NONE
integer(c_int) :: err,rank,size
integer(c_int) :: c_mpi_comm
integer(c_int) :: c_mpi_comm_slf
rank=0
size=1
CALL MPI_INIT(err)
! I added
c_mpi_comm = MPI_COMM_WORLD
c_mpi_comm_slf = MPI_COMM_SELF
CALL my_MPI_Init(c_mpi_comm, c_mpi_comm_slf, err)
! substituted this with my own function
call my_MPI_Comm_rank(c_mpi_comm, rank, err)
! CALL MPI_COMM_RANK(MPI_COMM_WORLD,rank,err)
CALL my_MPI_Comm_size(MPI_COMM_WORLD,size,err)
parallel%parallel=.TRUE.
parallel%task=rank
IF(rank.EQ.0) THEN
parallel%boss=.TRUE.
ENDIF
parallel%boss_task=0
parallel%max_task=size
END SUBROUTINE clover_init_comms
SUBROUTINE clover_get_num_chunks(count)
IMPLICIT NONE
integer(c_int) :: count
! Should be changed so there can be more than one chunk per mpi task
count=parallel%max_task
END SUBROUTINE clover_get_num_chunks
SUBROUTINE clover_decompose(x_cells,y_cells,left,right,bottom,top,chunk_x,chunk_y)
! This decomposes the mesh into a number of chunks.
! The number of chunks may be a multiple of the number of mpi tasks
! Doesn't always return the best split if there are few factors
! All factors need to be stored and the best picked. But its ok for now
IMPLICIT NONE
integer(c_int) :: x_cells,y_cells,left,right,top,bottom
integer(c_int) :: c,delta_x,delta_y
REAL(KIND=8) :: mesh_ratio,factor_x,factor_y
integer(c_int) :: chunk_x,chunk_y,mod_x,mod_y,split_found
integer(c_int) :: cx,cy,cnk,add_x,add_y,add_x_prev,add_y_prev
! 2D Decomposition of the mesh
mesh_ratio=real(x_cells)/real(y_cells)
chunk_x=number_of_chunks
chunk_y=1
split_found=0 ! Used to detect 1D decomposition
DO c=1,number_of_chunks
IF (MOD(number_of_chunks,c).EQ.0) THEN
factor_x=number_of_chunks/real(c)
factor_y=c
!Compare the factor ratio with the mesh ratio
IF(factor_x/factor_y.LE.mesh_ratio) THEN
chunk_y=c
chunk_x=number_of_chunks/c
split_found=1
EXIT
ENDIF
ENDIF
ENDDO
IF(split_found.EQ.0.OR.chunk_y.EQ.number_of_chunks) THEN ! Prime number or 1D decomp detected
IF(mesh_ratio.GE.1.0) THEN
chunk_x=number_of_chunks
chunk_y=1
ELSE
chunk_x=1
chunk_y=number_of_chunks
ENDIF
ENDIF
delta_x=x_cells/chunk_x
delta_y=y_cells/chunk_y
mod_x=MOD(x_cells,chunk_x)
mod_y=MOD(y_cells,chunk_y)
! print *, "chunk_y:", chunk_y
! print *, "chunk_x:", chunk_x
! Set up chunk mesh ranges and chunk connectivity
add_x_prev=0
add_y_prev=0
cnk=1
DO cy=1,chunk_y
DO cx=1,chunk_x
add_x=0
add_y=0
IF(cx.LE.mod_x)add_x=1
IF(cy.LE.mod_y)add_y=1
IF (cnk .EQ. parallel%task+1) THEN
left = (cx-1)*delta_x+1+add_x_prev
right = left+delta_x-1+add_x
bottom = (cy-1)*delta_y+1+add_y_prev
top = bottom+delta_y-1+add_y
chunk%chunk_neighbours(chunk_left)=chunk_x*(cy-1)+cx-1
chunk%chunk_neighbours(chunk_right)=chunk_x*(cy-1)+cx+1
chunk%chunk_neighbours(chunk_bottom)=chunk_x*(cy-2)+cx
chunk%chunk_neighbours(chunk_top)=chunk_x*(cy)+cx
IF(cx.EQ.1) chunk%chunk_neighbours(chunk_left)=external_face
IF(cx.EQ.chunk_x) chunk%chunk_neighbours(chunk_right)=external_face
IF(cy.EQ.1) chunk%chunk_neighbours(chunk_bottom)=external_face
IF(cy.EQ.chunk_y) chunk%chunk_neighbours(chunk_top)=external_face
ENDIF
IF(cx.LE.mod_x)add_x_prev=add_x_prev+1
cnk=cnk+1
ENDDO
add_x_prev=0
IF(cy.LE.mod_y)add_y_prev=add_y_prev+1
ENDDO
IF(parallel%boss)THEN
WRITE(g_out,*)
WRITE(g_out,*)"Mesh ratio of ",mesh_ratio
WRITE(g_out,*)"Decomposing the mesh into ",chunk_x," by ",chunk_y," chunks"
WRITE(g_out,*)"Decomposing the chunk with ",tiles_per_chunk," tiles"
WRITE(g_out,*)
ENDIF
END SUBROUTINE clover_decompose
SUBROUTINE clover_tile_decompose(chunk_x_cells, chunk_y_cells)
IMPLICIT NONE
integer(c_int) :: chunk_x_cells, chunk_y_cells
integer(c_int) :: chunk_mesh_ratio, tile_x, tile_y, split_found, factor_x, factor_y, t
integer(c_int) :: chunk_delta_x, chunk_delta_y, chunk_mod_x, chunk_mod_y
integer(c_int) :: add_x_prev, add_y_prev, tile, tx, ty, add_x, add_y, left, right, top, bottom
chunk_mesh_ratio=real(chunk_x_cells)/real(chunk_y_cells)
tile_x=tiles_per_chunk
tile_y=1
split_found=0 ! Used to detect 1D decomposition
DO t=1,tiles_per_chunk
IF (MOD(tiles_per_chunk,t).EQ.0) THEN
factor_x=tiles_per_chunk/real(t)
factor_y=t
!Compare the factor ratio with the mesh ratio
IF(factor_x/factor_y.LE.chunk_mesh_ratio) THEN
tile_y=t
tile_x=tiles_per_chunk/t
split_found=1
EXIT
ENDIF
ENDIF
ENDDO
IF(split_found.EQ.0.OR.tile_y.EQ.tiles_per_chunk) THEN ! Prime number or 1D decomp detected
IF(chunk_mesh_ratio.GE.1.0) THEN
tile_x=tiles_per_chunk
tile_y=1
ELSE
tile_x=1
tile_y=tiles_per_chunk
ENDIF
ENDIF
chunk_delta_x=chunk_x_cells/tile_x
chunk_delta_y=chunk_y_cells/tile_y
chunk%delta_x = chunk_delta_x
chunk%delta_y = chunk_delta_y
chunk_mod_x=MOD(chunk_x_cells,tile_x)
chunk_mod_y=MOD(chunk_y_cells,tile_y)
add_x_prev=0
add_y_prev=0
tile=1
DO ty=1,tile_y
DO tx=1,tile_x
add_x=0
add_y=0
IF(tx.LE.chunk_mod_x)add_x=1
IF(ty.LE.chunk_mod_y)add_y=1
left = chunk%left+(tx-1)*chunk_delta_x+add_x_prev
right = left+chunk_delta_x-1+add_x
bottom = chunk%bottom+(ty-1)*chunk_delta_y+add_y_prev
top = bottom+chunk_delta_y-1+add_y
chunk%tiles(tile)%tile_neighbours(tile_left)=tile_x*(ty-1)+tx-1
chunk%tiles(tile)%tile_neighbours(tile_right)=tile_x*(ty-1)+tx+1
chunk%tiles(tile)%tile_neighbours(tile_bottom)=tile_x*(ty-2)+tx
chunk%tiles(tile)%tile_neighbours(tile_top)=tile_x*(ty)+tx
!initial set the external tile mask to 0 for each tile
chunk%tiles(tile)%external_tile_mask = 0
IF(tx.EQ.1) THEN
chunk%tiles(tile)%tile_neighbours(tile_left)=external_tile
chunk%tiles(tile)%external_tile_mask(TILE_LEFT) = 1
ENDIF
IF(tx.EQ.tile_x) THEN
chunk%tiles(tile)%tile_neighbours(tile_right)=external_tile
chunk%tiles(tile)%external_tile_mask(TILE_RIGHT) = 1
ENDIF
IF(ty.EQ.1) THEN
chunk%tiles(tile)%tile_neighbours(tile_bottom)=external_tile
chunk%tiles(tile)%external_tile_mask(TILE_BOTTOM) = 1
ENDIF
IF(ty.EQ.tile_y) THEN
chunk%tiles(tile)%tile_neighbours(tile_top)=external_tile
chunk%tiles(tile)%external_tile_mask(TILE_TOP) = 1
ENDIF
IF(tx.LE.chunk_mod_x)add_x_prev=add_x_prev+1
chunk%tiles(tile)%t_xmin = 1
chunk%tiles(tile)%t_xmax = right - left + 1
chunk%tiles(tile)%t_ymin = 1
chunk%tiles(tile)%t_ymax = top - bottom + 1
chunk%tiles(tile)%t_left = left
chunk%tiles(tile)%t_right = right
chunk%tiles(tile)%t_top = top
chunk%tiles(tile)%t_bottom = bottom
tile=tile+1
ENDDO
add_x_prev=0
IF(ty.LE.chunk_mod_y)add_y_prev=add_y_prev+1
ENDDO
END SUBROUTINE clover_tile_decompose
SUBROUTINE clover_allocate_buffers()
IMPLICIT NONE
! Unallocated buffers for external boundaries caused issues on some systems so they are now
! all allocated
IF(parallel%task.EQ.chunk%task)THEN
!IF(chunk%chunk_neighbours(chunk_left).NE.external_face) THEN
ALLOCATE(chunk%left_snd_buffer(10*2*(chunk%y_max+5)))
ALLOCATE(chunk%left_rcv_buffer(10*2*(chunk%y_max+5)))
ALLOCATE(chunk%init_left_buffer(10*2*(chunk%y_max+5)))
!ENDIF
!IF(chunk%chunk_neighbours(chunk_right).NE.external_face) THEN
ALLOCATE(chunk%right_snd_buffer(10*2*(chunk%y_max+5)))
ALLOCATE(chunk%right_rcv_buffer(10*2*(chunk%y_max+5)))
ALLOCATE(chunk%init_right_buffer(10*2*(chunk%y_max+5)))
!ENDIF
!IF(chunk%chunk_neighbours(chunk_bottom).NE.external_face) THEN
ALLOCATE(chunk%bottom_snd_buffer(10*2*(chunk%x_max+5)))
ALLOCATE(chunk%bottom_rcv_buffer(10*2*(chunk%x_max+5)))
ALLOCATE(chunk%init_bottom_buffer(10*2*(chunk%x_max+5)))
!ENDIF
!IF(chunk%chunk_neighbours(chunk_top).NE.external_face) THEN
ALLOCATE(chunk%top_snd_buffer(10*2*(chunk%x_max+5)))
ALLOCATE(chunk%top_rcv_buffer(10*2*(chunk%x_max+5)))
ALLOCATE(chunk%init_top_buffer(10*2*(chunk%x_max+5)))
!ENDIF
ENDIF
END SUBROUTINE clover_allocate_buffers
SUBROUTINE clover_exchange(fields,depth)
IMPLICIT NONE
integer(c_int) :: fields(:),depth, tile, cnk
integer(c_int) :: left_right_offset(15),bottom_top_offset(15)
integer(c_int) :: request(4)
integer(c_int) :: message_count,err
integer(c_int) :: status(MPI_STATUS_SIZE,4)
integer(c_int) :: end_pack_index_left_right, end_pack_index_bottom_top,field
integer(c_int) :: rank
! Assuming 1 patch per task, this will be changed
request=0
message_count=0
cnk = 1
call my_MPI_Comm_rank(MPI_COMM_WORLD, rank, err)
end_pack_index_left_right=0
end_pack_index_bottom_top=0
DO field=1,15
IF(fields(field).EQ.1) THEN
left_right_offset(field)=end_pack_index_left_right
bottom_top_offset(field)=end_pack_index_bottom_top
end_pack_index_left_right=end_pack_index_left_right+depth*(chunk%y_max+5)
end_pack_index_bottom_top=end_pack_index_bottom_top+depth*(chunk%x_max+5)
ENDIF
ENDDO
IF(chunk%chunk_neighbours(chunk_left).NE.external_face .and. rank /= 6) THEN
! do left exchanges
! Find left hand tiles
DO tile=1,tiles_per_chunk
IF(chunk%tiles(tile)%external_tile_mask(TILE_LEFT).EQ.1) THEN
CALL clover_pack_left(tile, fields, depth, left_right_offset)
ENDIF
ENDDO
!send and recv messagse to the left
CALL clover_send_recv_message_left(chunk%left_snd_buffer, &
chunk%left_rcv_buffer, &
end_pack_index_left_right, &
1, 2, &
request(message_count+1), request(message_count+2))
message_count = message_count + 2
ENDIF
IF(chunk%chunk_neighbours(chunk_right).NE.external_face .and. rank /= 5) THEN
! do right exchanges
DO tile=1,tiles_per_chunk
IF(chunk%tiles(tile)%external_tile_mask(TILE_RIGHT).EQ.1) THEN
CALL clover_pack_right(tile, fields, depth, left_right_offset)
ENDIF
ENDDO
!send message to the right
CALL clover_send_recv_message_right(chunk%right_snd_buffer, &
chunk%right_rcv_buffer, &
end_pack_index_left_right, &
2, 1, &
request(message_count+1), request(message_count+2))
message_count = message_count + 2
ENDIF
!unpack in left direction
IF(chunk%chunk_neighbours(chunk_left).NE.external_face) THEN
DO tile=1,tiles_per_chunk
IF(chunk%tiles(tile)%external_tile_mask(TILE_LEFT).EQ.1) THEN
CALL clover_unpack_left(fields, tile, depth, &
chunk%left_rcv_buffer, &
left_right_offset)
ENDIF
ENDDO
ENDIF
!unpack in right direction
IF(chunk%chunk_neighbours(chunk_right).NE.external_face) THEN
DO tile=1,tiles_per_chunk
IF(chunk%tiles(tile)%external_tile_mask(TILE_RIGHT).EQ.1) THEN
CALL clover_unpack_right(fields, tile, depth, &
chunk%right_rcv_buffer, &
left_right_offset)
ENDIF
ENDDO
ENDIF
message_count = 0
request = 0
IF(chunk%chunk_neighbours(chunk_bottom).NE.external_face) THEN
! do bottom exchanges
DO tile=1,tiles_per_chunk
IF(chunk%tiles(tile)%external_tile_mask(TILE_BOTTOM).EQ.1) THEN
CALL clover_pack_bottom(tile, fields, depth, bottom_top_offset)
ENDIF
ENDDO
!send message downwards
CALL clover_send_recv_message_bottom(chunk%bottom_snd_buffer, &
chunk%bottom_rcv_buffer, &
end_pack_index_bottom_top, &
3, 4, &
request(message_count+1), request(message_count+2))
message_count = message_count + 2
ENDIF
IF(chunk%chunk_neighbours(chunk_top).NE.external_face) THEN
! do top exchanges
DO tile=1,tiles_per_chunk
IF(chunk%tiles(tile)%external_tile_mask(TILE_TOP).EQ.1) THEN
CALL clover_pack_top(tile, fields, depth, bottom_top_offset)
ENDIF
ENDDO
!send message upwards
CALL clover_send_recv_message_top(chunk%top_snd_buffer, &
chunk%top_rcv_buffer, &
end_pack_index_bottom_top, &
4, 3, &
request(message_count+1), request(message_count+2))
message_count = message_count + 2
ENDIF
!unpack in top direction
IF( chunk%chunk_neighbours(chunk_top).NE.external_face ) THEN
DO tile=1,tiles_per_chunk
IF(chunk%tiles(tile)%external_tile_mask(TILE_TOP).EQ.1) THEN
CALL clover_unpack_top(fields, tile, depth, &
chunk%top_rcv_buffer, &
bottom_top_offset)
ENDIF
ENDDO
ENDIF
!unpack in bottom direction
IF(chunk%chunk_neighbours(chunk_bottom).NE.external_face) THEN
DO tile=1,tiles_per_chunk
IF(chunk%tiles(tile)%external_tile_mask(TILE_BOTTOM).EQ.1) THEN
CALL clover_unpack_bottom(fields, tile, depth, &
chunk%bottom_rcv_buffer, &
bottom_top_offset)
ENDIF
ENDDO
ENDIF
END SUBROUTINE clover_exchange
SUBROUTINE clover_pack_left(tile, fields, depth, left_right_offset)
USE pack_kernel_module
IMPLICIT NONE
integer(c_int) :: fields(:),depth, tile, t_offset
integer(c_int) :: left_right_offset(:)
t_offset = (chunk%tiles(tile)%t_bottom - chunk%bottom)*depth
IF(use_fortran_kernels) THEN
IF(fields(FIELD_DENSITY0).EQ.1) THEN
CALL clover_pack_message_left(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%density0, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, CELL_DATA, &
left_right_offset(FIELD_DENSITY0)+t_offset)
ENDIF
IF(fields(FIELD_DENSITY1).EQ.1) THEN
CALL clover_pack_message_left(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%density1, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, CELL_DATA, &
left_right_offset(FIELD_DENSITY1)+t_offset)
ENDIF
IF(fields(FIELD_ENERGY0).EQ.1) THEN
CALL clover_pack_message_left(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%energy0, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, CELL_DATA, &
left_right_offset(FIELD_ENERGY0)+t_offset)
ENDIF
IF(fields(FIELD_ENERGY1).EQ.1) THEN
CALL clover_pack_message_left(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%energy1, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, CELL_DATA, &
left_right_offset(FIELD_ENERGY1)+t_offset)
ENDIF
IF(fields(FIELD_PRESSURE).EQ.1) THEN
CALL clover_pack_message_left(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%pressure, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, CELL_DATA, &
left_right_offset(FIELD_PRESSURE)+t_offset)
ENDIF
IF(fields(FIELD_VISCOSITY).EQ.1) THEN
CALL clover_pack_message_left(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%viscosity, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, CELL_DATA, &
left_right_offset(FIELD_VISCOSITY)+t_offset)
ENDIF
IF(fields(FIELD_SOUNDSPEED).EQ.1) THEN
CALL clover_pack_message_left(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%soundspeed, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, CELL_DATA, &
left_right_offset(FIELD_SOUNDSPEED)+t_offset)
ENDIF
IF(fields(FIELD_XVEL0).EQ.1) THEN
CALL clover_pack_message_left(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%xvel0, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, VERTEX_DATA, &
left_right_offset(FIELD_XVEL0)+t_offset)
ENDIF
IF(fields(FIELD_XVEL1).EQ.1) THEN
CALL clover_pack_message_left(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%xvel1, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, VERTEX_DATA, &
left_right_offset(FIELD_XVEL1)+t_offset)
ENDIF
IF(fields(FIELD_YVEL0).EQ.1) THEN
CALL clover_pack_message_left(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%yvel0, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, VERTEX_DATA, &
left_right_offset(FIELD_YVEL0)+t_offset)
ENDIF
IF(fields(FIELD_YVEL1).EQ.1) THEN
CALL clover_pack_message_left(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%yvel1, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, VERTEX_DATA, &
left_right_offset(FIELD_YVEL1)+t_offset)
ENDIF
IF(fields(FIELD_VOL_FLUX_X).EQ.1) THEN
CALL clover_pack_message_left(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%vol_flux_x, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, X_FACE_DATA, &
left_right_offset(FIELD_VOL_FLUX_X)+t_offset)
ENDIF
IF(fields(FIELD_VOL_FLUX_Y).EQ.1) THEN
CALL clover_pack_message_left(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%vol_flux_y, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, Y_FACE_DATA, &
left_right_offset(FIELD_VOL_FLUX_Y)+t_offset)
ENDIF
IF(fields(FIELD_MASS_FLUX_X).EQ.1) THEN
CALL clover_pack_message_left(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%mass_flux_x, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, X_FACE_DATA, &
left_right_offset(FIELD_MASS_FLUX_X)+t_offset)
ENDIF
IF(fields(FIELD_MASS_FLUX_Y).EQ.1) THEN
CALL clover_pack_message_left(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%mass_flux_y, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, Y_FACE_DATA, &
left_right_offset(FIELD_MASS_FLUX_Y)+t_offset)
ENDIF
ELSEIF(use_C_kernels) THEN
IF(fields(FIELD_DENSITY0).EQ.1) THEN
CALL clover_pack_message_left_c(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%density0, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, CELL_DATA, &
left_right_offset(FIELD_DENSITY0)+t_offset)
ENDIF
IF(fields(FIELD_DENSITY1).EQ.1) THEN
CALL clover_pack_message_left_c(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%density1, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, CELL_DATA, &
left_right_offset(FIELD_DENSITY1)+t_offset)
ENDIF
IF(fields(FIELD_ENERGY0).EQ.1) THEN
CALL clover_pack_message_left_c(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%energy0, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, CELL_DATA, &
left_right_offset(FIELD_ENERGY0)+t_offset)
ENDIF
IF(fields(FIELD_ENERGY1).EQ.1) THEN
CALL clover_pack_message_left_c(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%energy1, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, CELL_DATA, &
left_right_offset(FIELD_ENERGY1)+t_offset)
ENDIF
IF(fields(FIELD_PRESSURE).EQ.1) THEN
CALL clover_pack_message_left_c(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%pressure, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, CELL_DATA, &
left_right_offset(FIELD_PRESSURE)+t_offset)
ENDIF
IF(fields(FIELD_VISCOSITY).EQ.1) THEN
CALL clover_pack_message_left_c(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%viscosity, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, CELL_DATA, &
left_right_offset(FIELD_VISCOSITY)+t_offset)
ENDIF
IF(fields(FIELD_SOUNDSPEED).EQ.1) THEN
CALL clover_pack_message_left_c(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%soundspeed, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, CELL_DATA, &
left_right_offset(FIELD_SOUNDSPEED)+t_offset)
ENDIF
IF(fields(FIELD_XVEL0).EQ.1) THEN
CALL clover_pack_message_left_c(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%xvel0, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, VERTEX_DATA, &
left_right_offset(FIELD_XVEL0)+t_offset)
ENDIF
IF(fields(FIELD_XVEL1).EQ.1) THEN
CALL clover_pack_message_left_c(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%xvel1, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, VERTEX_DATA, &
left_right_offset(FIELD_XVEL1)+t_offset)
ENDIF
IF(fields(FIELD_YVEL0).EQ.1) THEN
CALL clover_pack_message_left_c(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%yvel0, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, VERTEX_DATA, &
left_right_offset(FIELD_YVEL0)+t_offset)
ENDIF
IF(fields(FIELD_YVEL1).EQ.1) THEN
CALL clover_pack_message_left_c(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%yvel1, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, VERTEX_DATA, &
left_right_offset(FIELD_YVEL1)+t_offset)
ENDIF
IF(fields(FIELD_VOL_FLUX_X).EQ.1) THEN
CALL clover_pack_message_left_c(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%vol_flux_x, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, X_FACE_DATA, &
left_right_offset(FIELD_VOL_FLUX_X)+t_offset)
ENDIF
IF(fields(FIELD_VOL_FLUX_Y).EQ.1) THEN
CALL clover_pack_message_left_c(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%vol_flux_y, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, Y_FACE_DATA, &
left_right_offset(FIELD_VOL_FLUX_Y)+t_offset)
ENDIF
IF(fields(FIELD_MASS_FLUX_X).EQ.1) THEN
CALL clover_pack_message_left_c(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%mass_flux_x, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, X_FACE_DATA, &
left_right_offset(FIELD_MASS_FLUX_X)+t_offset)
ENDIF
IF(fields(FIELD_MASS_FLUX_Y).EQ.1) THEN
CALL clover_pack_message_left_c(chunk%tiles(tile)%t_xmin, &
chunk%tiles(tile)%t_xmax, &
chunk%tiles(tile)%t_ymin, &
chunk%tiles(tile)%t_ymax, &
chunk%tiles(tile)%field%mass_flux_y, &
chunk%left_snd_buffer, &
CELL_DATA,VERTEX_DATA,X_FACE_DATA,Y_FACE_DATA,&
depth, Y_FACE_DATA, &
left_right_offset(FIELD_MASS_FLUX_Y)+t_offset)
ENDIF
ENDIF
END SUBROUTINE clover_pack_left
SUBROUTINE clover_send_recv_message_left(left_snd_buffer, left_rcv_buffer, &
total_size, &
tag_send, tag_recv, &
req_send, req_recv)
USE global_vars
IMPLICIT NONE
REAL(KIND=8), POINTER :: left_snd_buffer(:), left_rcv_buffer(:)
integer(c_int) :: left_task
integer(c_int) :: total_size, tag_send, tag_recv, err
integer(c_int) :: req_send, req_recv
integer(c_int) :: rank, index, failed_size
integer(c_int) :: i, j, flag
integer(c_int) :: x, x0, x1
! new
! pointer to communicate with the c library
type(c_ptr) :: ptr_snd, ptr_rec
! status for the receive calls
integer :: status(MPI_STATUS_SIZE)
! current processe's coordinates
integer :: row, col
! number of neighboring nodes to the left
integer :: num_left_chunks
! array to store all the ranks that are left to this node
integer, POINTER :: left_chunks(:)
! array to store the ranks of failed nodes
integer, POINTER :: failed_nodes(:)
! pointer to the above array
type(c_ptr) :: failed_ptr
flag = 1
! source rank
call my_MPI_Comm_rank(MPI_COMM_WORLD, rank, err)
! destination rank
left_task =chunk%chunk_neighbours(chunk_left) - 1
! get a list of failed nodes
call fort_fault_number(MPI_COMM_WORLD, failed_size)
allocate(failed_nodes(failed_size))
failed_ptr = c_loc(failed_nodes)
call fort_who_failed(MPI_COMM_WORLD, failed_size, failed_ptr)
! Calculate the row (i) and column (j) of the chunk_id
row = rank / chunk_x
col = mod(rank, chunk_x)
num_left_chunks = col
allocate(left_chunks(num_left_chunks))
! get a list of all lefts in order of closeness
j = col
do while (j > 0)
j = j - 1
left_chunks(num_left_chunks - j) = row * chunk_x + j
end do
! mirroring
do index = 1, total_size
left_rcv_buffer(index) = left_snd_buffer(index)
end do
if (global_method == 3 .or. global_method == 4) then
i = 1
do while (i <= num_left_chunks)
j = 1
do while (j <= failed_size)
if (left_chunks(i) /= failed_nodes(j)) then
! print *, "left was:", left_task, "now:", left_chunks(i)
left_task = left_chunks(i)
i = num_left_chunks + 1
EXIT
endif
j = j+1
end do
i = i+1
end do
endif
! print *, "source: ", rank, "left_task :", left_task
ptr_snd = c_loc(left_snd_buffer)
ptr_rec = c_loc(left_rcv_buffer)
IF (rank < left_task) then
CALL my_MPI_Send(ptr_snd ,total_size,MPI_DOUBLE_PRECISION,left_task,tag_send &
,MPI_COMM_WORLD,err)
CALL my_MPI_Recv(ptr_rec,total_size,MPI_DOUBLE_PRECISION,left_task,tag_recv &
,MPI_COMM_WORLD,status,err)
ELSE
CALL my_MPI_Recv(ptr_rec,total_size,MPI_DOUBLE_PRECISION,left_task,tag_recv &