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hydro.f90
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hydro.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 Controls the main hydro cycle.
!> @author Wayne Gaudin
!> @details Controls the top level cycle, invoking all the drivers and checks
!> for outputs and completion.
SUBROUTINE hydro
USE clover_module
USE timestep_module
USE viscosity_module
USE PdV_module
USE accelerate_module
USE flux_calc_module
USE advection_module
USE reset_field_module
IMPLICIT NONE
INTEGER :: loc(1)
REAL(KIND=8) :: timer,timerstart,wall_clock,step_clock
REAL(KIND=8) :: grind_time,cells,rstep
REAL(KIND=8) :: step_time,step_grind
REAL(KIND=8) :: first_step,second_step
REAL(KIND=8) :: kernel_total,totals(parallel%max_task)
timerstart = timer()
DO
step_time = timer()
step = step + 1
CALL timestep()
CALL PdV(.TRUE.)
CALL accelerate()
CALL PdV(.FALSE.)
CALL flux_calc()
CALL advection()
CALL reset_field()
advect_x = .NOT. advect_x
time = time + dt
IF(summary_frequency.NE.0) THEN
IF(MOD(step, summary_frequency).EQ.0) CALL field_summary()
ENDIF
IF(visit_frequency.NE.0) THEN
IF(MOD(step, visit_frequency).EQ.0) CALL visit()
ENDIF
! Sometimes there can be a significant start up cost that appears in the first step.
! Sometimes it is due to the number of MPI tasks, or OpenCL kernel compilation.
! On the short test runs, this can skew the results, so should be taken into account
! in recorded run times.
IF(step.EQ.1) first_step=(timer() - step_time)
IF(step.EQ.2) second_step=(timer() - step_time)
IF(time+g_small.GT.end_time.OR.step.GE.end_step) THEN
complete=.TRUE.
CALL field_summary()
IF(visit_frequency.NE.0) CALL visit()
wall_clock=timer() - timerstart
IF ( parallel%boss ) THEN
WRITE(g_out,*)
WRITE(g_out,*) 'Calculation complete'
WRITE(g_out,*) 'Clover is finishing'
WRITE(g_out,*) 'Wall clock ', wall_clock
WRITE(g_out,*) 'First step overhead', first_step-second_step
WRITE( 0,*) 'Wall clock ', wall_clock
WRITE( 0,*) 'First step overhead', first_step-second_step
ENDIF
IF ( profiler_on ) THEN
! First we need to find the maximum kernel time for each task. This
! seems to work better than finding the maximum time for each kernel and
! adding it up, which always gives over 100%. I think this is because it
! does not take into account compute overlaps before syncronisations
! caused by halo exhanges.
kernel_total=profiler%timestep+profiler%ideal_gas+profiler%viscosity+profiler%PdV &
+profiler%revert+profiler%acceleration+profiler%flux+profiler%cell_advection &
+profiler%mom_advection+profiler%reset+profiler%halo_exchange+profiler%summary &
+profiler%visit
CALL clover_allgather(kernel_total,totals)
! So then what I do is use the individual kernel times for the
! maximum kernel time task for the profile print
loc=MAXLOC(totals)
kernel_total=totals(loc(1))
CALL clover_allgather(profiler%timestep,totals)
profiler%timestep=totals(loc(1))
CALL clover_allgather(profiler%ideal_gas,totals)
profiler%ideal_gas=totals(loc(1))
CALL clover_allgather(profiler%viscosity,totals)
profiler%viscosity=totals(loc(1))
CALL clover_allgather(profiler%PdV,totals)
profiler%PdV=totals(loc(1))
CALL clover_allgather(profiler%revert,totals)
profiler%revert=totals(loc(1))
CALL clover_allgather(profiler%acceleration,totals)
profiler%acceleration=totals(loc(1))
CALL clover_allgather(profiler%flux,totals)
profiler%flux=totals(loc(1))
CALL clover_allgather(profiler%cell_advection,totals)
profiler%cell_advection=totals(loc(1))
CALL clover_allgather(profiler%mom_advection,totals)
profiler%mom_advection=totals(loc(1))
CALL clover_allgather(profiler%reset,totals)
profiler%reset=totals(loc(1))
CALL clover_allgather(profiler%halo_exchange,totals)
profiler%halo_exchange=totals(loc(1))
CALL clover_allgather(profiler%summary,totals)
profiler%summary=totals(loc(1))
CALL clover_allgather(profiler%visit,totals)
profiler%visit=totals(loc(1))
IF ( parallel%boss ) THEN
WRITE(g_out,*)
WRITE(g_out,'(a58,2f16.4)')"Profiler Output Time Percentage"
WRITE(g_out,'(a23,2f16.4)')"Timestep :",profiler%timestep,100.0*(profiler%timestep/wall_clock)
WRITE(g_out,'(a23,2f16.4)')"Ideal Gas :",profiler%ideal_gas,100.0*(profiler%ideal_gas/wall_clock)
WRITE(g_out,'(a23,2f16.4)')"Viscosity :",profiler%viscosity,100.0*(profiler%viscosity/wall_clock)
WRITE(g_out,'(a23,2f16.4)')"PdV :",profiler%PdV,100.0*(profiler%PdV/wall_clock)
WRITE(g_out,'(a23,2f16.4)')"Revert :",profiler%revert,100.0*(profiler%revert/wall_clock)
WRITE(g_out,'(a23,2f16.4)')"Acceleration :",profiler%acceleration,100.0*(profiler%acceleration/wall_clock)
WRITE(g_out,'(a23,2f16.4)')"Fluxes :",profiler%flux,100.0*(profiler%flux/wall_clock)
WRITE(g_out,'(a23,2f16.4)')"Cell Advection :",profiler%cell_advection,100.0*(profiler%cell_advection/wall_clock)
WRITE(g_out,'(a23,2f16.4)')"Momentum Advection :",profiler%mom_advection,100.0*(profiler%mom_advection/wall_clock)
WRITE(g_out,'(a23,2f16.4)')"Reset :",profiler%reset,100.0*(profiler%reset/wall_clock)
WRITE(g_out,'(a23,2f16.4)')"Halo Exchange :",profiler%halo_exchange,100.0*(profiler%halo_exchange/wall_clock)
WRITE(g_out,'(a23,2f16.4)')"Summary :",profiler%summary,100.0*(profiler%summary/wall_clock)
WRITE(g_out,'(a23,2f16.4)')"Visit :",profiler%visit,100.0*(profiler%visit/wall_clock)
WRITE(g_out,'(a23,2f16.4)')"Total :",kernel_total,100.0*(kernel_total/wall_clock)
WRITE(g_out,'(a23,2f16.4)')"The Rest :",wall_clock-kernel_total,100.0*(wall_clock-kernel_total)/wall_clock
ENDIF
ENDIF
CALL clover_finalize
EXIT
END IF
IF (parallel%boss) THEN
wall_clock=timer()-timerstart
step_clock=timer()-step_time
WRITE(g_out,*)"Wall clock ",wall_clock
WRITE(0 ,*)"Wall clock ",wall_clock
cells = grid%x_cells * grid%y_cells
rstep = step
grind_time = wall_clock/(rstep * cells)
step_grind = step_clock/cells
WRITE(0 ,*)"Average time per cell ",grind_time
WRITE(g_out,*)"Average time per cell ",grind_time
WRITE(0 ,*)"Step time per cell ",step_grind
WRITE(g_out,*)"Step time per cell ",step_grind
END IF
END DO
END SUBROUTINE hydro