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cafsync.f90
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cafsync.f90
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!----------------------------------------------------------------------------!
! !
! Fortran Coarray MicroBenchmark Suite - Version 1.0 !
! !
! David Henty, EPCC; [email protected] !
! !
! Copyright 2013 the University of Edinburgh !
! !
! Licensed under the Apache License, Version 2.0 (the "License"); !
! you may not use this file except in compliance with the License. !
! You may obtain a copy of the License at !
! !
! http://www.apache.org/licenses/LICENSE-2.0 !
! !
! Unless required by applicable law or agreed to in writing, software !
! distributed under the License is distributed on an "AS IS" BASIS, !
! WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. !
! See the License for the specific language governing permissions and !
! limitations under the License. !
! !
!----------------------------------------------------------------------------!
module cafsync
use iso_fortran_env
use cafcore
use cafclock
implicit none
double precision :: conf95 = 1.96
contains
subroutine cafsyncbench(outerreps, innercount, dl, cafsynctype, numneigh)
integer :: outerreps, innercount, innerreps, dl, cafsynctype, numneigh
integer, allocatable, dimension(:) :: neighbours
logical :: active = .true.
double precision, dimension(0:outerreps) :: time
double precision :: tstart, tstop
double precision :: meantime, totaltime, sd, reftime, refsd
integer :: upimage, dnimage, imageshift
integer :: i, j, k, nout
type(lock_type), save :: caflock[*]
! !DIR$ INLINENEVER delay
if (thisimage == 1) then
write(*,*) 'cafsync: Synchronisation type: ', cafsyncname(cafsynctype)
write(*,*) 'cafsync: outerreps, innercount, delay = ', outerreps, innercount, dl
end if
select case (cafsynctype)
case (cafsyncring, cafsyncrand, cafsync3d, cafsyncpair)
if (numneigh .ge. numimages) then
write(*,*) 'cafsync: numneigh too large!'
stop
else if (thisimage == 1) then
write(*,*) 'cafsync: Number of neighbours is ', numneigh
end if
allocate(neighbours(numneigh))
call getneighs(thisimage, numimages, neighbours, cafsynctype)
case (cafsyncall, cafsyncmpi, cafsynccrit, cafsynclock)
case default
write(*,*) 'cafsync: Illegal cafsynctype: ', cafsynctype
stop
end select
innerreps = innercount
if (cafsynctype == cafsynclock .or. cafsynctype == cafsynccrit) then
! cope with the fact tha we scale innerreps by numimages for serialised
! synchronisation.
innerreps = max(2, innercount/numimages)
innerreps = innerreps * numimages
if (innerreps /= innercount) then
if (thisimage == 1) then
write(*,*) 'cafsync: rescaling reference innercount to ', innerreps
end if
end if
end if
sync all
! Reference time - always discard iteration 0
do k = 0, outerreps
tstart = caftime()
do j = 1, innerreps
call delay(dl)
end do
tstop = caftime()
time(k) = (tstop - tstart) / dble (innerreps)
end do
totaltime = sum(time(1:outerreps))*dble(innerreps)
call stats (time, outerreps, meantime, sd, nout)
reftime = meantime
refsd = sd
if (thisimage == 1) then
write(*,*) 'cafsync: reference time is ', reftime*1.0e6, &
' +/- ', refsd*1.0e6, 'usec'
! write(*,*) 'cafsync: median time is', mediantime*1.0e6, 'usecs'
write(*,*) 'cafsync: number of outliers was ', nout
end if
sync all
! Now do actual sync - always discard iteration 0
do k = 0, outerreps
sync all
tstart = caftime()
select case (cafsynctype)
case (cafsyncall, cafsyncmpi, &
cafsyncring, cafsyncrand, cafsync3d, cafsyncpair)
innerreps = innercount
do j = 1, innerreps
call delay(dl)
call cafdosync(cafsynctype, active, neighbours)
end do
case (cafsynccrit)
innerreps = max(2, innercount/numimages)
do j = 1, innerreps
critical
call delay(dl)
end critical
end do
case (cafsynclock)
innerreps = max(2, innercount/numimages)
do j = 1, innerreps
lock (caflock[1])
call delay(dl)
unlock (caflock[1])
end do
case default
write(*,*) 'cafsync: Illegal cafsynctype: ', cafsynctype
stop
end select
sync all
tstop = caftime()
time(k) = (tstop - tstart) / dble (innercount)
end do
totaltime = sum(time(1:outerreps))*dble(innercount)
call stats (time, outerreps, meantime, sd, nout)
if (thisimage == 1) then
write(*,*) 'cafsync: elapsed is ', totaltime, ' seconds'
write(*,*) 'cafsync: loop time is ', meantime*1.0e6, ' +/- ', sd*1.0e6, 'usecs'
! write(*,*) 'cafsync: median is ', mediantime*1.0e6, 'usecs'
write(*,*) 'cafsync: number of outliers was ', nout
write(*,*) 'cafsync: sync time is ', (meantime - reftime)*1.0e6, ' +/- ', conf95*(sd+refsd)*1.0e6, ' usecs'
write(*,*)
! do k = 0, outerreps
! write(*,*) k, time(k)*1.0e6
! end do
write(*,*)
end if
return
end subroutine cafsyncbench
subroutine stats (time, outerreps, meantime, sd, nr)
implicit none
integer :: outerreps
double precision, dimension(0:outerreps) :: time
! double precision, allocatable, dimension(:) :: tmptime
double precision :: meantime, totaltime
double precision :: sumsq, mintime, maxtime, sd
double precision :: cutoff
integer :: nr, i
! allocate(tmptime(outerreps))
mintime = time(1)
maxtime = time(1)
totaltime = 0.0
do i = 2, outerreps
mintime = min(mintime,time(i))
maxtime = max(maxtime,time(i))
totaltime = totaltime + time(i)
end do
meantime = totaltime / dble(outerreps)
sumsq = 0.
do i = 1, outerreps
sumsq = sumsq + (time(i)-meantime)**2
end do
sd = sqrt(sumsq/dble(outerreps-1))
! COUNT OUTLIERS
cutoff = 3.0 * sd
nr = 0
do i = 1, outerreps
if (abs(time(i)-meantime) > cutoff) nr = nr + 1
end do
! tmptime(1:outerreps) = time(1:outerreps)
!
! call qsort(tmptime)
!
! if (mod(outerreps,2) == 1) then
! mediantime = tmptime((outerreps+1)/2)
! else
! mediantime = (tmptime(outerreps/2) + tmptime(outerreps/2 + 1))/2.0d0
! end if
! if (thisimage == 1) write (*,*)
! if (thisimage == 1) write(*,'(a11,8x,a7,6x,a3,10x,a3,11x,a5,6x,a8)')&
! 'Sample_size','Average','Min','Max','S.D.','Outliers'
! if (thisimage == 1) write (*,1002) outerreps, meantime, mintime,maxtime, sd, nr
! if (thisimage == 1) write (*,*) 'mediantime = ', mediantime
! if (thisimage == 1) write (*,*)
!1002 format(4x,i7,4x,4f13.5,4x,i7)
!
! deallocate(tmptime)
return
end subroutine stats
end module cafsync