You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
529 lines
17 KiB
Fortran
529 lines
17 KiB
Fortran
!!$
|
|
!!$
|
|
!!$ MLD2P4 version 2.0
|
|
!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
|
|
!!$ based on PSBLAS (Parallel Sparse BLAS version 3.0)
|
|
!!$
|
|
!!$ (C) Copyright 2008,2009,2010,2012
|
|
!!$
|
|
!!$ Salvatore Filippone University of Rome Tor Vergata
|
|
!!$ Alfredo Buttari CNRS-IRIT, Toulouse
|
|
!!$ Pasqua D'Ambra ICAR-CNR, Naples
|
|
!!$ Daniela di Serafino Second University of Naples
|
|
!!$
|
|
!!$ Redistribution and use in source and binary forms, with or without
|
|
!!$ modification, are permitted provided that the following conditions
|
|
!!$ are met:
|
|
!!$ 1. Redistributions of source code must retain the above copyright
|
|
!!$ notice, this list of conditions and the following disclaimer.
|
|
!!$ 2. Redistributions in binary form must reproduce the above copyright
|
|
!!$ notice, this list of conditions, and the following disclaimer in the
|
|
!!$ documentation and/or other materials provided with the distribution.
|
|
!!$ 3. The name of the MLD2P4 group or the names of its contributors may
|
|
!!$ not be used to endorse or promote products derived from this
|
|
!!$ software without specific written permission.
|
|
!!$
|
|
!!$ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
!!$ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
!!$ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
!!$ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE MLD2P4 GROUP OR ITS CONTRIBUTORS
|
|
!!$ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
!!$ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
!!$ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
!!$ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
!!$ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
!!$ POSSIBILITY OF SUCH DAMAGE.
|
|
!!$
|
|
!!$
|
|
! File: mld_dmlprec_bld.f90
|
|
!
|
|
! Subroutine: mld_dmlprec_bld
|
|
! Version: real
|
|
!
|
|
! This routine builds the preconditioner according to the requirements made by
|
|
! the user trough the subroutines mld_precinit and mld_precset.
|
|
!
|
|
! A multilevel preconditioner is regarded as an array of 'one-level' data structures,
|
|
! each containing the part of the preconditioner associated to a certain level,
|
|
! (for more details see the description of mld_Tonelev_type in mld_prec_type.f90).
|
|
! The levels are numbered in increasing order starting from the finest one, i.e.
|
|
! level 1 is the finest level. No transfer operators are associated to level 1.
|
|
!
|
|
!
|
|
! Arguments:
|
|
! a - type(psb_dspmat_type).
|
|
! The sparse matrix structure containing the local part of the
|
|
! matrix to be preconditioned.
|
|
! desc_a - type(psb_desc_type), input.
|
|
! The communication descriptor of a.
|
|
! p - type(mld_dprec_type), input/output.
|
|
! The preconditioner data structure containing the local part
|
|
! of the preconditioner to be built.
|
|
! info - integer, output.
|
|
! Error code.
|
|
!
|
|
! amold - class(psb_d_base_sparse_mat), input, optional
|
|
! Mold for the inner format of matrices contained in the
|
|
! preconditioner
|
|
!
|
|
!
|
|
! vmold - class(psb_d_base_vect_type), input, optional
|
|
! Mold for the inner format of vectors contained in the
|
|
! preconditioner
|
|
!
|
|
!
|
|
!
|
|
subroutine mld_dmlprec_bld(a,desc_a,p,info,amold,vmold)
|
|
|
|
use psb_base_mod
|
|
use mld_d_inner_mod, mld_protect_name => mld_dmlprec_bld
|
|
use mld_d_prec_mod
|
|
|
|
Implicit None
|
|
|
|
! Arguments
|
|
type(psb_dspmat_type),intent(in), target :: a
|
|
type(psb_desc_type), intent(in), target :: desc_a
|
|
type(mld_dprec_type),intent(inout),target :: p
|
|
integer(psb_ipk_), intent(out) :: info
|
|
class(psb_d_base_sparse_mat), intent(in), optional :: amold
|
|
class(psb_d_base_vect_type), intent(in), optional :: vmold
|
|
!!$ character, intent(in), optional :: upd
|
|
|
|
! Local Variables
|
|
type(mld_dprec_type) :: t_prec
|
|
integer(psb_ipk_) :: ictxt, me,np
|
|
integer(psb_ipk_) :: err,i,k, err_act, iszv, newsz, casize
|
|
integer(psb_ipk_) :: ipv(mld_ifpsz_), val
|
|
integer(psb_ipk_) :: int_err(5)
|
|
character :: upd_
|
|
class(mld_d_base_smoother_type), allocatable :: coarse_sm, base_sm, med_sm
|
|
type(mld_dml_parms) :: baseparms, medparms, coarseparms
|
|
type(mld_d_onelev_node), pointer :: head, tail, newnode, current
|
|
integer(psb_ipk_) :: debug_level, debug_unit
|
|
character(len=20) :: name, ch_err
|
|
|
|
if (psb_get_errstatus().ne.0) return
|
|
info=psb_success_
|
|
err=0
|
|
call psb_erractionsave(err_act)
|
|
debug_unit = psb_get_debug_unit()
|
|
debug_level = psb_get_debug_level()
|
|
|
|
name = 'mld_dmlprec_bld'
|
|
info = psb_success_
|
|
int_err(1) = 0
|
|
ictxt = desc_a%get_context()
|
|
call psb_info(ictxt, me, np)
|
|
|
|
if (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& 'Entering '
|
|
!
|
|
! For the time being we are commenting out the UPDATE argument
|
|
! we plan to resurrect it later.
|
|
!!$ if (present(upd)) then
|
|
!!$ if (debug_level >= psb_debug_outer_) &
|
|
!!$ & write(debug_unit,*) me,' ',trim(name),'UPD ', upd
|
|
!!$
|
|
!!$ if ((psb_toupper(upd).eq.'F').or.(psb_toupper(upd).eq.'T')) then
|
|
!!$ upd_=psb_toupper(upd)
|
|
!!$ else
|
|
!!$ upd_='F'
|
|
!!$ endif
|
|
!!$ else
|
|
!!$ upd_='F'
|
|
!!$ endif
|
|
upd_ = 'F'
|
|
|
|
if (.not.allocated(p%precv)) then
|
|
!! Error: should have called mld_dprecinit
|
|
info=3111
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
!
|
|
! Check to ensure all procs have the same
|
|
!
|
|
newsz = -1
|
|
casize = p%coarse_aggr_size
|
|
iszv = size(p%precv)
|
|
call psb_bcast(ictxt,iszv)
|
|
call psb_bcast(ictxt,casize)
|
|
if (casize > 0) then
|
|
if (casize /= p%coarse_aggr_size) then
|
|
info=psb_err_internal_error_
|
|
call psb_errpush(info,name,a_err='Inconsistent coarse_aggr_size')
|
|
goto 9999
|
|
end if
|
|
else
|
|
if (iszv /= size(p%precv)) then
|
|
info=psb_err_internal_error_
|
|
call psb_errpush(info,name,a_err='Inconsistent size of precv')
|
|
goto 9999
|
|
end if
|
|
end if
|
|
|
|
if (iszv <= 1) then
|
|
! We should only ever get here for multilevel.
|
|
info=psb_err_from_subroutine_
|
|
ch_err='size bpv'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
endif
|
|
|
|
|
|
|
|
if (casize>0) then
|
|
!
|
|
! New strategy to build according to coarse size.
|
|
!
|
|
coarseparms = p%precv(iszv)%parms
|
|
baseparms = p%precv(1)%parms
|
|
medparms = p%precv(2)%parms
|
|
|
|
allocate(coarse_sm, source=p%precv(iszv)%sm,stat=info)
|
|
if (info == psb_success_) &
|
|
& allocate(med_sm, source=p%precv(2)%sm,stat=info)
|
|
if (info == psb_success_) &
|
|
& allocate(base_sm, source=p%precv(1)%sm,stat=info)
|
|
if (info /= psb_success_) then
|
|
write(0,*) 'Error in saving smoothers',info
|
|
call psb_errpush(psb_err_internal_error_,name,a_err='Base level precbuild.')
|
|
goto 9999
|
|
end if
|
|
!
|
|
! Replicated matrix should only ever happen at coarse level.
|
|
!
|
|
call mld_check_def(baseparms%coarse_mat,'Coarse matrix',&
|
|
& mld_distr_mat_,is_distr_ml_coarse_mat)
|
|
!
|
|
! Now build a doubly linked list
|
|
!
|
|
allocate(newnode,stat=info)
|
|
if (info /= psb_success_) then
|
|
info = psb_err_internal_error_
|
|
call psb_errpush(info,name,a_err='List start'); goto 9999
|
|
end if
|
|
head => newnode
|
|
tail => newnode
|
|
newnode%item%base_a => a
|
|
newnode%item%base_desc => desc_a
|
|
newnode%item%parms = baseparms
|
|
newsz = 1
|
|
current => head
|
|
list_build_loop: do
|
|
allocate(newnode,stat=info)
|
|
if (info /= psb_success_) then
|
|
info = psb_err_internal_error_
|
|
call psb_errpush(info,name,a_err='List start'); goto 9999
|
|
end if
|
|
current%next => newnode
|
|
newnode%prev => current
|
|
newsz = newsz + 1
|
|
newnode%item%parms = medparms
|
|
newnode%item%parms%aggr_thresh = current%item%parms%aggr_thresh/2
|
|
call mld_coarse_bld(current%item%base_a, current%item%base_desc, &
|
|
& newnode%item,info)
|
|
if (info /= psb_success_) then
|
|
info = psb_err_internal_error_
|
|
call psb_errpush(info,name,a_err='build next level'); goto 9999
|
|
end if
|
|
|
|
if (newsz>2) then
|
|
if (all(current%item%map%naggr == newnode%item%map%naggr)) then
|
|
!
|
|
! We are not gaining anything
|
|
!
|
|
newsz = newsz-1
|
|
current%next => null()
|
|
call newnode%item%free(info)
|
|
if (info == psb_success_) deallocate(newnode,stat=info)
|
|
if (info /= psb_success_) then
|
|
info = psb_err_internal_error_
|
|
call psb_errpush(info,name,a_err='Deallocate at list end'); goto 9999
|
|
end if
|
|
end if
|
|
end if
|
|
|
|
current => current%next
|
|
tail => current
|
|
if (sum(newnode%item%map%naggr) <= casize) then
|
|
!
|
|
! Target reached; but we may need to rebuild.
|
|
!
|
|
exit list_build_loop
|
|
end if
|
|
end do list_build_loop
|
|
!
|
|
! At this point, we are at the list tail,
|
|
! and it needs to be rebuilt in case the parms were
|
|
! different.
|
|
!
|
|
! But the threshold has to be fixed before rebuliding
|
|
coarseparms%aggr_thresh = current%item%parms%aggr_thresh
|
|
current%item%parms = coarseparms
|
|
call mld_coarse_bld(current%prev%item%base_a,&
|
|
& current%prev%item%base_desc, &
|
|
& current%item,info)
|
|
if (info /= psb_success_) then
|
|
info = psb_err_internal_error_
|
|
call psb_errpush(info,name,a_err='build next level'); goto 9999
|
|
end if
|
|
|
|
!
|
|
! Ok, now allocate the output vector and fix items.
|
|
!
|
|
do i=1,iszv
|
|
if (info == psb_success_) call p%precv(i)%free(info)
|
|
end do
|
|
if (info == psb_success_) deallocate(p%precv,stat=info)
|
|
if (info == psb_success_) allocate(p%precv(newsz),stat=info)
|
|
if (info /= psb_success_) then
|
|
info = psb_err_internal_error_
|
|
call psb_errpush(info,name,a_err='Reallocate precv'); goto 9999
|
|
end if
|
|
newnode => head
|
|
do i=1, newsz
|
|
current => newnode
|
|
if (info == psb_success_) &
|
|
& call mld_move_alloc(current%item,p%precv(i),info)
|
|
if (info == psb_success_) then
|
|
if (i ==1) then
|
|
! This is a workaround for a bug in gfortran 4.7.2
|
|
call doallc(i,p%precv,base_sm,info)
|
|
! !$ allocate(p%precv(i)%sm,source=base_sm,stat=info)
|
|
else if (i < newsz) then
|
|
call doallc(i,p%precv,med_sm,info)
|
|
! !$ allocate(p%precv(i)%sm,source=med_sm,stat=info)
|
|
else
|
|
call doallc(i,p%precv,coarse_sm,info)
|
|
! !$ allocate(p%precv(i)%sm,source=coarse_sm,stat=info)
|
|
end if
|
|
end if
|
|
if (info /= psb_success_) then
|
|
info = psb_err_internal_error_
|
|
call psb_errpush(info,name,a_err='list cpy'); goto 9999
|
|
end if
|
|
if (i == 1) then
|
|
p%precv(i)%base_a => a
|
|
p%precv(i)%base_desc => desc_a
|
|
else
|
|
p%precv(i)%base_a => p%precv(i)%ac
|
|
p%precv(i)%base_desc => p%precv(i)%desc_ac
|
|
p%precv(i)%map%p_desc_X => p%precv(i-1)%base_desc
|
|
p%precv(i)%map%p_desc_Y => p%precv(i)%base_desc
|
|
end if
|
|
|
|
newnode => current%next
|
|
deallocate(current)
|
|
end do
|
|
call base_sm%free(info)
|
|
if (info == psb_success_) call med_sm%free(info)
|
|
if (info == psb_success_) call coarse_sm%free(info)
|
|
if (info == psb_success_) deallocate(coarse_sm,med_sm,base_sm,stat=info)
|
|
if (info /= psb_success_) then
|
|
info = psb_err_internal_error_
|
|
call psb_errpush(info,name,a_err='final cleanup'); goto 9999
|
|
end if
|
|
iszv = newsz
|
|
|
|
else
|
|
!
|
|
! Default, oldstyle
|
|
!
|
|
|
|
!
|
|
! Build the matrix and the transfer operators corresponding
|
|
! to the remaining levels
|
|
!
|
|
!
|
|
! Check on the iprcparm contents: they should be the same
|
|
! on all processes.
|
|
!
|
|
call psb_bcast(ictxt,p%precv(1)%parms)
|
|
!
|
|
! Finest level first; remember to fix base_a and base_desc
|
|
!
|
|
p%precv(1)%base_a => a
|
|
p%precv(1)%base_desc => desc_a
|
|
|
|
|
|
do i=2, iszv
|
|
!
|
|
! Check on the iprcparm contents: they should be the same
|
|
! on all processes.
|
|
!
|
|
call psb_bcast(ictxt,p%precv(i)%parms)
|
|
|
|
!
|
|
! Sanity checks on the parameters
|
|
!
|
|
if (i<iszv) then
|
|
!
|
|
! A replicated matrix only makes sense at the coarsest level
|
|
!
|
|
call mld_check_def(p%precv(i)%parms%coarse_mat,'Coarse matrix',&
|
|
& mld_distr_mat_,is_distr_ml_coarse_mat)
|
|
end if
|
|
|
|
if (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& 'Calling mlprcbld at level ',i
|
|
!
|
|
! Build the mapping between levels i-1 and i and the matrix
|
|
! at level i
|
|
!
|
|
if (info == psb_success_) call mld_coarse_bld(p%precv(i-1)%base_a,&
|
|
& p%precv(i-1)%base_desc, p%precv(i),info)
|
|
|
|
if (info /= psb_success_) then
|
|
call psb_errpush(psb_err_internal_error_,name,&
|
|
& a_err='Init upper level preconditioner')
|
|
goto 9999
|
|
endif
|
|
|
|
if (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& 'Return from ',i,' call to mlprcbld ',info
|
|
|
|
if (i>2) then
|
|
if (all(p%precv(i)%map%naggr == p%precv(i-1)%map%naggr)) then
|
|
newsz=i-1
|
|
end if
|
|
call psb_bcast(ictxt,newsz)
|
|
if (newsz > 0) exit
|
|
end if
|
|
end do
|
|
|
|
if (newsz > 0) then
|
|
if (me == 0) then
|
|
write(debug_unit,*) trim(name),&
|
|
&': Warning: aggregates from level ',&
|
|
& newsz
|
|
write(debug_unit,*) trim(name),&
|
|
&': to level ',&
|
|
& iszv,' coincide.'
|
|
write(debug_unit,*) trim(name),&
|
|
&': Number of levels actually used :',newsz
|
|
write(debug_unit,*)
|
|
end if
|
|
allocate(t_prec%precv(newsz),stat=info)
|
|
if (info /= psb_success_) then
|
|
call psb_errpush(psb_err_from_subroutine_,name,&
|
|
& a_err='prec reallocation')
|
|
goto 9999
|
|
endif
|
|
do i=1,newsz-1
|
|
call mld_move_alloc(p%precv(i),t_prec%precv(i),info)
|
|
end do
|
|
call mld_move_alloc(p%precv(iszv),t_prec%precv(newsz),info)
|
|
do i=newsz+1, iszv
|
|
call p%precv(i)%free(info)
|
|
end do
|
|
call mld_move_alloc(t_prec,p,info)
|
|
! Ignore errors from transfer
|
|
info = psb_success_
|
|
!
|
|
! Restart
|
|
iszv = newsz
|
|
! Fix the pointers, but the level 1 should
|
|
! be already OK
|
|
do i=2, iszv - 1
|
|
p%precv(i)%base_a => p%precv(i)%ac
|
|
p%precv(i)%base_desc => p%precv(i)%desc_ac
|
|
p%precv(i)%map%p_desc_X => p%precv(i-1)%base_desc
|
|
p%precv(i)%map%p_desc_Y => p%precv(i)%base_desc
|
|
end do
|
|
|
|
i = iszv
|
|
if (info == psb_success_) call mld_coarse_bld(p%precv(i-1)%base_a,&
|
|
& p%precv(i-1)%base_desc, p%precv(i),info)
|
|
if (info /= psb_success_) then
|
|
call psb_errpush(psb_err_from_subroutine_,name,a_err='coarse rebuild')
|
|
goto 9999
|
|
endif
|
|
end if
|
|
end if
|
|
|
|
!
|
|
! The coarse space hierarchy has been build.
|
|
!
|
|
! Now do the preconditioner build.
|
|
!
|
|
|
|
do i=1, iszv
|
|
!
|
|
! build the base preconditioner at level i
|
|
!
|
|
if (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& 'Calling mlprcbld at level ',i
|
|
call mld_check_def(p%precv(i)%parms%sweeps,&
|
|
& 'Jacobi sweeps',ione,is_legal_jac_sweeps)
|
|
call mld_check_def(p%precv(i)%parms%sweeps_pre,&
|
|
& 'Jacobi sweeps',ione,is_legal_jac_sweeps)
|
|
call mld_check_def(p%precv(i)%parms%sweeps_post,&
|
|
& 'Jacobi sweeps',ione,is_legal_jac_sweeps)
|
|
|
|
if (.not.allocated(p%precv(i)%sm)) then
|
|
!! Error: should have called mld_dprecinit
|
|
info=3111
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
if (.not.allocated(p%precv(i)%sm%sv)) then
|
|
!! Error: should have called mld_dprecinit
|
|
info=3111
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
call p%precv(i)%sm%build(p%precv(i)%base_a,p%precv(i)%base_desc,&
|
|
& 'F',info,amold=amold,vmold=vmold)
|
|
|
|
if ((info == psb_success_).and.(i>1).and.(present(amold))) then
|
|
call psb_map_cscnv(p%precv(i)%map,info,mold=amold)
|
|
call p%precv(i)%ac%cscnv(info,mold=amold)
|
|
end if
|
|
if (info /= psb_success_) then
|
|
call psb_errpush(psb_err_internal_error_,name,&
|
|
& a_err='One level preconditioner build.')
|
|
goto 9999
|
|
endif
|
|
|
|
if (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& 'Return from ',i,' call to mlprcbld ',info
|
|
end do
|
|
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 continue
|
|
call psb_erractionrestore(err_act)
|
|
if (err_act.eq.psb_act_abort_) then
|
|
call psb_error()
|
|
return
|
|
end if
|
|
return
|
|
|
|
|
|
contains
|
|
|
|
subroutine doallc(i,v,src,info)
|
|
type(mld_d_onelev_type), intent(inout) :: v(:)
|
|
integer(psb_ipk_), intent(in) :: i
|
|
class(mld_d_base_smoother_type), intent(in) :: src
|
|
integer(psb_ipk_), intent(out) :: info
|
|
|
|
if ((lbound(v,1)<=i).and.(i<=ubound(v,1))) then
|
|
allocate(v(i)%sm,source=src,stat=info)
|
|
end if
|
|
end subroutine doallc
|
|
|
|
end subroutine mld_dmlprec_bld
|