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qp2/scripts/verif_omp/check_omp.f90

176 lines
4.2 KiB
Fortran

program check_omp_v2
use omp_lib
implicit none
integer :: accu, accu2
integer :: s, n_setting
logical :: verbose, test_versions
logical, allocatable :: is_working(:)
verbose = .False.
test_versions = .True.
n_setting = 4
allocate(is_working(n_setting))
is_working = .False.
! set the number of threads
call omp_set_num_threads(2)
do s = 1, n_setting
accu = 0
accu2 = 0
call omp_set_max_active_levels(1)
call omp_set_nested(.False.)
if (s==1) then
!call set_multiple_levels_omp()
cycle
elseif (s==2) then
call omp_set_max_active_levels(5)
elseif (s==3) then
call omp_set_nested(.True.)
else
call omp_set_nested(.True.)
call omp_set_max_active_levels(5)
endif
! Level 1
!$OMP PARALLEL
if (verbose) then
print*,'Num threads level 1:',omp_get_num_threads()
endif
! Level 2
!$OMP PARALLEL
if (verbose) then
print*,'Num threads level 2:',omp_get_num_threads()
endif
! Level 3
!$OMP PARALLEL
if (verbose) then
print*,'Num threads level 3:',omp_get_num_threads()
endif
call check_omp_in_subroutine(accu2)
! Level 4
!$OMP PARALLEL
if (verbose) then
print*,'Num threads level 4:',omp_get_num_threads()
endif
!$OMP ATOMIC
accu = accu + 1
!$OMP END ATOMIC
!$OMP END PARALLEL
!$OMP END PARALLEL
!$OMP END PARALLEL
!$OMP END PARALLEL
if (verbose) then
print*,'Setting:',s,'accu=',accu
print*,'Setting:',s,'accu2=',accu2
endif
if (accu == 16 .and. accu2 == 16) then
is_working(s) = .True.
endif
enddo
if (verbose) then
if (is_working(2)) then
print*,'The parallelization works on 4 levels with:'
print*,'call omp_set_max_active_levels(5)'
print*,''
print*,'Please use the irpf90 flags -DSET_MAX_ACT in qp2/config/${compiler_name}.cfg'
elseif (is_working(3)) then
print*,'The parallelization works on 4 levels with:'
print*,'call omp_set_nested(.True.)'
print*,''
print*,'Please use the irpf90 flag -DSET_NESTED in qp2/config/${compiler_name}.cfg'
elseif (is_working(4)) then
print*,'The parallelization works on 4 levels with:'
print*,'call omp_set_nested(.True.)'
print*,'+'
print*,'call omp_set_max_active_levels(5)'
print*,''
print*,'Please use the irpf90 flags -DSET_NESTED -DSET_MAX_ACT in qp2/config/${compiler_name}.cfg'
else
print*,'The parallelization on multiple levels does not work with:'
print*,'call omp_set_max_active_levels(5)'
print*,'or'
print*,'call omp_set_nested(.True.)'
print*,'or'
print*,'call omp_set_nested(.True.)'
print*,'+'
print*,'call omp_set_max_active_levels(5)'
print*,''
print*,'Try an other compiler and good luck...'
endif
! if (is_working(1)) then
! print*,''
! print*,'=========================================================='
! print*,'Your actual set up works for parallelization with 4 levels'
! print*,'=========================================================='
! print*,''
! else
! print*,''
! print*,'==================================================================='
! print*,'Your actual set up does not work for parallelization with 4 levels'
! print*,'Please look at the previous messages to understand the requirements'
! print*,'==================================================================='
! print*,''
! endif
endif
! List of working flags
if (test_versions) then
print*,'Tests:',is_working(2:4)
endif
! IRPF90_FLAGS
if (is_working(2)) then
print*,'-DSET_MAX_ACT'
elseif (is_working(3)) then
print*,'-DSET_NESTED'
elseif (is_working(4)) then
print*,'-DSET_MAX_ACT -DSET_NESTED'
else
print*,'ERROR'
endif
end
subroutine check_omp_in_subroutine(accu2)
implicit none
integer, intent(inout) :: accu2
!$OMP PARALLEL
!$OMP ATOMIC
accu2 = accu2 + 1
!$OMP END ATOMIC
!$OMP END PARALLEL
end