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tea_leaf_ppcg.f90
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tea_leaf_ppcg.f90
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!Crown Copyright 2014 AWE.
!
! This file is part of TeaLeaf.
!
! TeaLeaf 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.
!
! TeaLeaf 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
! TeaLeaf. If not, see http://www.gnu.org/licenses/.
!> @brief Fortran heat conduction kernel
!> @author Michael Boulton, Wayne Gaudin, Douglas Shanks
!> @details Implicitly calculates the change in temperature using the PPCG method
MODULE tea_leaf_ppcg_module
USE tea_leaf_ppcg_kernel_module
USE tea_leaf_cheby_module
USE definitions_module
USE update_halo_module
IMPLICIT NONE
CONTAINS
SUBROUTINE tea_leaf_ppcg_init_sd(theta)
IMPLICIT NONE
INTEGER :: t
REAL(KIND=8) :: theta
IF (use_fortran_kernels) THEN
!$OMP PARALLEL
!$OMP DO
DO t=1,tiles_per_task
CALL tea_leaf_kernel_ppcg_init_sd(chunk%tiles(t)%field%x_min,&
chunk%tiles(t)%field%x_max, &
chunk%tiles(t)%field%y_min, &
chunk%tiles(t)%field%y_max, &
chunk%halo_exchange_depth, &
chunk%tiles(t)%field%vector_r, &
chunk%tiles(t)%field%vector_Kx, &
chunk%tiles(t)%field%vector_Ky, &
chunk%tiles(t)%field%vector_Di, &
chunk%tiles(t)%field%vector_sd, &
chunk%tiles(t)%field%vector_z, &
chunk%tiles(t)%field%vector_utemp, &
chunk%tiles(t)%field%vector_rtemp, &
chunk%tiles(t)%field%tri_cp, &
chunk%tiles(t)%field%tri_bfp, &
chunk%tiles(t)%field%vector_Mi, &
chunk%tiles(t)%field%rx, &
chunk%tiles(t)%field%ry, &
theta, tl_preconditioner_type)
ENDDO
!$OMP END DO NOWAIT
!$OMP END PARALLEL
ENDIF
END SUBROUTINE tea_leaf_ppcg_init_sd
! This routine is needed to initialise PPCG
SUBROUTINE tea_leaf_ppcg_init(ppcg_inner_iters, ch_alphas, ch_betas, theta, solve_time, step, rro)
IMPLICIT NONE
INTEGER :: ppcg_inner_iters,step
REAL(KIND=8) :: rro,theta,solve_time
REAL(KIND=8), DIMENSION(:) :: ch_alphas,ch_betas
INTEGER :: t
REAL(KIND=8) :: tile_rro
rro = 0.0_8
IF (use_fortran_kernels) THEN
!$OMP PARALLEL PRIVATE(tile_rro) REDUCTION(+:rro)
!$OMP DO
DO t=1,tiles_per_task
tile_rro = 0.0_8
CALL tea_leaf_ppcg_init_kernel(chunk%tiles(t)%field%x_min, &
chunk%tiles(t)%field%x_max, &
chunk%tiles(t)%field%y_min, &
chunk%tiles(t)%field%y_max, &
chunk%halo_exchange_depth, &
chunk%tiles(t)%field%vector_p, &
chunk%tiles(t)%field%vector_r, &
chunk%tiles(t)%field%vector_Mi, &
chunk%tiles(t)%field%vector_z, &
chunk%tiles(t)%field%vector_Kx, &
chunk%tiles(t)%field%vector_Ky, &
chunk%tiles(t)%field%vector_Di, &
chunk%tiles(t)%field%tri_cp, &
chunk%tiles(t)%field%tri_bfp, &
chunk%tiles(t)%field%rx, &
chunk%tiles(t)%field%ry, &
tile_rro, tl_preconditioner_type, &
ppcg_inner_iters, ch_alphas, ch_betas, theta, solve_time, step)
rro = rro + tile_rro
ENDDO
!$OMP END DO NOWAIT
!$OMP END PARALLEL
ENDIF
END SUBROUTINE tea_leaf_ppcg_init
SUBROUTINE tea_leaf_ppcg_calc_zrnorm(rrn)
IMPLICIT NONE
INTEGER :: t
REAL(KIND=8) :: rrn, tile_rrn
rrn = 0.0_8
IF (use_fortran_kernels) THEN
!$OMP PARALLEL PRIVATE(tile_rrn)
!$OMP DO REDUCTION(+:rrn)
DO t=1,tiles_per_task
tile_rrn = 0.0_8
CALL tea_leaf_ppcg_calc_zrnorm_kernel(chunk%tiles(t)%field%x_min, &
chunk%tiles(t)%field%x_max, &
chunk%tiles(t)%field%y_min, &
chunk%tiles(t)%field%y_max, &
chunk%halo_exchange_depth, &
chunk%tiles(t)%field%vector_z, &
chunk%tiles(t)%field%vector_r, &
tl_preconditioner_type, tile_rrn)
rrn = rrn + tile_rrn
ENDDO
!$OMP END DO NOWAIT
!$OMP END PARALLEL
ENDIF
END SUBROUTINE tea_leaf_ppcg_calc_zrnorm
SUBROUTINE tea_leaf_ppcg_update_z()
IMPLICIT NONE
INTEGER :: t
IF (use_fortran_kernels) THEN
!$OMP PARALLEL
!$OMP DO
DO t=1,tiles_per_task
CALL tea_leaf_ppcg_update_z_kernel(chunk%tiles(t)%field%x_min, &
chunk%tiles(t)%field%x_max, &
chunk%tiles(t)%field%y_min, &
chunk%tiles(t)%field%y_max, &
chunk%halo_exchange_depth, &
chunk%tiles(t)%field%vector_z, &
chunk%tiles(t)%field%vector_utemp)
ENDDO
!$OMP END DO NOWAIT
!$OMP END PARALLEL
ENDIF
END SUBROUTINE tea_leaf_ppcg_update_z
SUBROUTINE tea_leaf_ppcg_pupdate
IMPLICIT NONE
INTEGER :: t
IF (use_fortran_kernels) THEN
!$OMP PARALLEL
!$OMP DO
DO t=1,tiles_per_task
CALL tea_leaf_ppcg_pupdate_kernel(chunk%tiles(t)%field%x_min, &
chunk%tiles(t)%field%x_max, &
chunk%tiles(t)%field%y_min, &
chunk%tiles(t)%field%y_max, &
chunk%halo_exchange_depth, &
chunk%tiles(t)%field%vector_z, &
chunk%tiles(t)%field%vector_p)
ENDDO
!$OMP END DO NOWAIT
!$OMP END PARALLEL
ENDIF
END SUBROUTINE tea_leaf_ppcg_pupdate
SUBROUTINE tea_calc_ls_coefs(ch_alphas, ch_betas, eigmin, eigmax, &
theta, ppcg_inner_steps)
INTEGER :: ppcg_inner_steps
REAL(KIND=8), DIMENSION(ppcg_inner_steps) :: ch_alphas, ch_betas
REAL(KIND=8) :: eigmin, eigmax, theta
! TODO
CALL tea_calc_ch_coefs(ch_alphas, ch_betas, eigmin, eigmax, &
theta, ppcg_inner_steps)
END SUBROUTINE
SUBROUTINE tea_leaf_run_ppcg_inner_steps(ch_alphas, ch_betas, theta, &
ppcg_inner_steps, solve_time)
IMPLICIT NONE
INTEGER :: fields(NUM_FIELDS)
INTEGER :: ppcg_inner_steps, ppcg_cur_step
REAL(KIND=8) :: theta
REAL(KIND=8) :: halo_time, timer, solve_time
REAL(KIND=8), DIMENSION(max(ppcg_inner_steps,0)) :: ch_alphas, ch_betas
INTEGER :: t, inner_step, bounds_extra
INTEGER :: x_min_bound, x_max_bound, y_min_bound, y_max_bound
!$ INTEGER :: OMP_GET_THREAD_NUM
IF (ppcg_inner_steps < 0) RETURN
CALL tea_leaf_ppcg_init_sd(theta)
! inner steps
DO ppcg_cur_step=1,ppcg_inner_steps,chunk%halo_exchange_depth
fields = 0
fields(FIELD_SD) = 1
fields(FIELD_R) = 1
IF (profiler_on) halo_time = timer()
CALL update_halo(fields,chunk%halo_exchange_depth)
IF (profiler_on) solve_time = solve_time + (timer()-halo_time)
inner_step = ppcg_cur_step
fields = 0
fields(FIELD_SD) = 1
IF (reflective_boundary) then
!$OMP PARALLEL PRIVATE(x_min_bound, x_max_bound, y_min_bound, y_max_bound)
!$OMP DO
DO t=1,tiles_per_task
DO bounds_extra = chunk%halo_exchange_depth-1, 0, -1
IF (use_fortran_kernels) THEN
IF (chunk%tiles(t)%tile_neighbours(CHUNK_LEFT).NE.EXTERNAL_FACE .OR. &
chunk%chunk_neighbours(CHUNK_LEFT).NE.EXTERNAL_FACE) THEN
x_min_bound = chunk%tiles(t)%field%x_min - bounds_extra
ELSE
x_min_bound = chunk%tiles(t)%field%x_min
ENDIF
IF (chunk%tiles(t)%tile_neighbours(CHUNK_RIGHT).NE.EXTERNAL_FACE .OR. &
chunk%chunk_neighbours(CHUNK_RIGHT).NE.EXTERNAL_FACE) THEN
x_max_bound = chunk%tiles(t)%field%x_max + bounds_extra
ELSE
x_max_bound = chunk%tiles(t)%field%x_max
ENDIF
IF (chunk%tiles(t)%tile_neighbours(CHUNK_BOTTOM).NE.EXTERNAL_FACE .OR. &
chunk%chunk_neighbours(CHUNK_BOTTOM).NE.EXTERNAL_FACE) THEN
y_min_bound = chunk%tiles(t)%field%y_min - bounds_extra
ELSE
y_min_bound = chunk%tiles(t)%field%y_min
ENDIF
IF (chunk%tiles(t)%tile_neighbours(CHUNK_TOP).NE.EXTERNAL_FACE .OR. &
chunk%chunk_neighbours(CHUNK_TOP).NE.EXTERNAL_FACE) THEN
y_max_bound = chunk%tiles(t)%field%y_max + bounds_extra
ELSE
y_max_bound = chunk%tiles(t)%field%y_max
ENDIF
CALL tea_leaf_kernel_ppcg_inner(chunk%tiles(t)%field%x_min,&
chunk%tiles(t)%field%x_max, &
chunk%tiles(t)%field%y_min, &
chunk%tiles(t)%field%y_max, &
chunk%halo_exchange_depth, &
x_min_bound, &
x_max_bound, &
y_min_bound, &
y_max_bound, &
ch_alphas, ch_betas, &
chunk%tiles(t)%field%rx, &
chunk%tiles(t)%field%ry, &
ppcg_cur_step + chunk%halo_exchange_depth-1 - bounds_extra, &
chunk%tiles(t)%field%u, &
chunk%tiles(t)%field%vector_r, &
chunk%tiles(t)%field%vector_Kx, &
chunk%tiles(t)%field%vector_Ky, &
chunk%tiles(t)%field%vector_Di, &
chunk%tiles(t)%field%vector_sd, &
chunk%tiles(t)%field%vector_z, &
chunk%tiles(t)%field%vector_utemp, &
chunk%tiles(t)%field%vector_rtemp, &
chunk%tiles(t)%field%tri_cp, &
chunk%tiles(t)%field%tri_bfp, &
chunk%tiles(t)%field%vector_Mi, &
tl_preconditioner_type)
ENDIF
!$ IF(OMP_GET_THREAD_NUM().EQ.0) THEN
IF (profiler_on) halo_time = timer()
!$ ENDIF
IF (reflective_boundary .EQV. .TRUE. .AND. ANY(chunk%chunk_neighbours .EQ. EXTERNAL_FACE)) THEN
IF (use_fortran_kernels)THEN
CALL update_halo_kernel(chunk%tiles(t)%field%x_min, &
chunk%tiles(t)%field%x_max, &
chunk%tiles(t)%field%y_min, &
chunk%tiles(t)%field%y_max, &
chunk%halo_exchange_depth, &
chunk%chunk_neighbours, &
chunk%tiles(t)%tile_neighbours, &
chunk%tiles(t)%field%density, &
chunk%tiles(t)%field%energy0, &
chunk%tiles(t)%field%energy1, &
chunk%tiles(t)%field%u, &
chunk%tiles(t)%field%vector_p, &
chunk%tiles(t)%field%vector_sd, &
chunk%tiles(t)%field%vector_rtemp, &
chunk%tiles(t)%field%vector_z, &
chunk%tiles(t)%field%vector_kx, &
chunk%tiles(t)%field%vector_ky, &
chunk%tiles(t)%field%vector_di, &
fields, &
1)
ENDIF
ENDIF
!$ IF(OMP_GET_THREAD_NUM().EQ.0) THEN
IF (profiler_on) profiler%halo_update = profiler%halo_update + (timer() - halo_time)
IF (profiler_on) solve_time = solve_time + (timer() - halo_time)
!$ ENDIF
IF (ppcg_cur_step + chunk%halo_exchange_depth-1 - bounds_extra .eq. ppcg_inner_steps) EXIT
ENDDO
ENDDO
!$OMP END DO NOWAIT
!$OMP END PARALLEL
else ! .not. reflective_boundary
!$OMP PARALLEL PRIVATE(x_min_bound, x_max_bound, y_min_bound, y_max_bound)
!$OMP DO
DO t=1,tiles_per_task
DO bounds_extra = chunk%halo_exchange_depth-1, 0, -1
IF (use_fortran_kernels) THEN
IF (chunk%tiles(t)%tile_neighbours(CHUNK_LEFT).NE.EXTERNAL_FACE .OR. &
chunk%chunk_neighbours(CHUNK_LEFT).NE.EXTERNAL_FACE) THEN
x_min_bound = chunk%tiles(t)%field%x_min - bounds_extra
ELSE
x_min_bound = chunk%tiles(t)%field%x_min
ENDIF
IF (chunk%tiles(t)%tile_neighbours(CHUNK_RIGHT).NE.EXTERNAL_FACE .OR. &
chunk%chunk_neighbours(CHUNK_RIGHT).NE.EXTERNAL_FACE) THEN
x_max_bound = chunk%tiles(t)%field%x_max + bounds_extra
ELSE
x_max_bound = chunk%tiles(t)%field%x_max
ENDIF
IF (chunk%tiles(t)%tile_neighbours(CHUNK_BOTTOM).NE.EXTERNAL_FACE .OR. &
chunk%chunk_neighbours(CHUNK_BOTTOM).NE.EXTERNAL_FACE) THEN
y_min_bound = chunk%tiles(t)%field%y_min - bounds_extra
ELSE
y_min_bound = chunk%tiles(t)%field%y_min
ENDIF
IF (chunk%tiles(t)%tile_neighbours(CHUNK_TOP).NE.EXTERNAL_FACE .OR. &
chunk%chunk_neighbours(CHUNK_TOP).NE.EXTERNAL_FACE) THEN
y_max_bound = chunk%tiles(t)%field%y_max + bounds_extra
ELSE
y_max_bound = chunk%tiles(t)%field%y_max
ENDIF
CALL tea_leaf_kernel_ppcg_inner(chunk%tiles(t)%field%x_min,&
chunk%tiles(t)%field%x_max, &
chunk%tiles(t)%field%y_min, &
chunk%tiles(t)%field%y_max, &
chunk%halo_exchange_depth, &
x_min_bound, &
x_max_bound, &
y_min_bound, &
y_max_bound, &
ch_alphas, ch_betas, &
chunk%tiles(t)%field%rx, &
chunk%tiles(t)%field%ry, &
ppcg_cur_step + chunk%halo_exchange_depth-1 - bounds_extra, &
chunk%tiles(t)%field%u, &
chunk%tiles(t)%field%vector_r, &
chunk%tiles(t)%field%vector_Kx, &
chunk%tiles(t)%field%vector_Ky, &
chunk%tiles(t)%field%vector_Di, &
chunk%tiles(t)%field%vector_sd, &
chunk%tiles(t)%field%vector_z, &
chunk%tiles(t)%field%vector_utemp, &
chunk%tiles(t)%field%vector_rtemp, &
chunk%tiles(t)%field%tri_cp, &
chunk%tiles(t)%field%tri_bfp, &
chunk%tiles(t)%field%vector_Mi, &
tl_preconditioner_type)
ENDIF
IF (ppcg_cur_step + chunk%halo_exchange_depth-1 - bounds_extra .eq. ppcg_inner_steps) EXIT
ENDDO
ENDDO
!$OMP END DO NOWAIT
!$OMP END PARALLEL
ENDIF !reflective_boundary
ENDDO
fields = 0
fields(FIELD_P) = 1
CALL tea_leaf_ppcg_update_z()
END SUBROUTINE tea_leaf_run_ppcg_inner_steps
SUBROUTINE tea_leaf_ppcg_store_r()
IMPLICIT NONE
INTEGER :: t
IF (use_fortran_kernels) THEN
!$OMP PARALLEL
!$OMP DO
DO t=1,tiles_per_task
CALL tea_leaf_ppcg_store_r_kernel(chunk%tiles(t)%field%x_min, &
chunk%tiles(t)%field%x_max, &
chunk%tiles(t)%field%y_min, &
chunk%tiles(t)%field%y_max, &
chunk%halo_exchange_depth, &
chunk%tiles(t)%field%vector_r, &
chunk%tiles(t)%field%vector_r_store )
ENDDO
!$OMP END DO
!$OMP END PARALLEL
ENDIF
END SUBROUTINE tea_leaf_ppcg_store_r
SUBROUTINE tea_leaf_ppcg_calc_rrn(rrn)
IMPLICIT NONE
INTEGER :: t
REAL(KIND=8) :: rrn, tile_rrn
rrn = 0.0_8
IF (use_fortran_kernels) THEN
!$OMP PARALLEL PRIVATE(tile_rrn)
!$OMP DO REDUCTION(+:rrn)
DO t=1,tiles_per_task
tile_rrn = 0.0_8
CALL tea_leaf_ppcg_calc_rrn_kernel(chunk%tiles(t)%field%x_min, &
chunk%tiles(t)%field%x_max, &
chunk%tiles(t)%field%y_min, &
chunk%tiles(t)%field%y_max, &
chunk%halo_exchange_depth, &
chunk%tiles(t)%field%vector_r, &
chunk%tiles(t)%field%vector_r_store, &
chunk%tiles(t)%field%vector_z, &
tile_rrn)
rrn = rrn + tile_rrn
ENDDO
!$OMP END DO
!$OMP END PARALLEL
ENDIF
END SUBROUTINE tea_leaf_ppcg_calc_rrn
END MODULE tea_leaf_ppcg_module