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.
386 lines
12 KiB
Fortran
386 lines
12 KiB
Fortran
!!$
|
|
!!$
|
|
!!$ MLD2P4 version 1.0
|
|
!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
|
|
!!$ based on PSBLAS (Parallel Sparse BLAS version 2.2)
|
|
!!$
|
|
!!$ (C) Copyright 2008
|
|
!!$
|
|
!!$ Salvatore Filippone University of Rome Tor Vergata
|
|
!!$ Alfredo Buttari University of Rome Tor Vergata
|
|
!!$ 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_zprecbld.f90
|
|
!
|
|
! Subroutine: mld_zprecbld
|
|
! Version: complex
|
|
! Contains: subroutine init_baseprec_av
|
|
!
|
|
! 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 'base preconditioners',
|
|
! each representing the part of the preconditioner associated to a certain level.
|
|
! The levels are numbered in increasing order starting from the finest one, i.e.
|
|
! level 1 is the finest level.
|
|
!
|
|
!
|
|
! Arguments:
|
|
! a - type(psb_zspmat_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_zprec_type), input/output.
|
|
! The preconditioner data structure containing the local part
|
|
! of the preconditioner to be built.
|
|
! info - integer, output.
|
|
! Error code.
|
|
!
|
|
subroutine mld_zprecbld(a,desc_a,p,info)
|
|
|
|
use psb_base_mod
|
|
use mld_inner_mod
|
|
use mld_prec_mod, mld_protect_name => mld_zprecbld
|
|
Implicit None
|
|
|
|
! Arguments
|
|
type(psb_zspmat_type), target :: a
|
|
type(psb_desc_type), intent(in), target :: desc_a
|
|
type(mld_zprec_type),intent(inout), target :: p
|
|
integer, intent(out) :: info
|
|
!!$ character, intent(in), optional :: upd
|
|
|
|
|
|
! Local Variables
|
|
type(mld_zprec_type) :: t_prec
|
|
Integer :: err,i,k,ictxt, me,np, err_act, iszv, newsz
|
|
integer :: ipv(mld_ifpsz_), val
|
|
integer :: int_err(5)
|
|
character :: upd_
|
|
integer :: debug_level, debug_unit
|
|
character(len=20) :: name, ch_err
|
|
|
|
if(psb_get_errstatus().ne.0) return
|
|
info=0
|
|
err=0
|
|
call psb_erractionsave(err_act)
|
|
debug_unit = psb_get_debug_unit()
|
|
debug_level = psb_get_debug_level()
|
|
|
|
name = 'mld_zprecbld'
|
|
info = 0
|
|
int_err(1) = 0
|
|
ictxt = psb_cd_get_context(desc_a)
|
|
call psb_info(ictxt, me, np)
|
|
|
|
if (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& 'Entering ',desc_a%matrix_data(:)
|
|
!
|
|
! 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_zprecinit
|
|
info=3111
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
!
|
|
! Check to ensure all procs have the same
|
|
!
|
|
newsz = -1
|
|
iszv = size(p%precv)
|
|
call psb_bcast(ictxt,iszv)
|
|
if (iszv /= size(p%precv)) then
|
|
info=4001
|
|
call psb_errpush(info,name,a_err='Inconsistent size of precv')
|
|
goto 9999
|
|
end if
|
|
|
|
if (iszv >= 1) then
|
|
!
|
|
! Check on the iprcparm contents: they should be the same
|
|
! on all processes.
|
|
!
|
|
if (me == psb_root_) ipv(:) = p%precv(1)%iprcparm(:)
|
|
call psb_bcast(ictxt,ipv)
|
|
if (any(ipv(:) /= p%precv(1)%iprcparm(:) )) then
|
|
write(debug_unit,*) me,name,&
|
|
&': Inconsistent arguments among processes, forcing a default'
|
|
p%precv(1)%iprcparm(:) = ipv(:)
|
|
end if
|
|
!
|
|
! Finest level first; remember to fix base_a and base_desc
|
|
!
|
|
call init_baseprec_av(p%precv(1)%prec,info)
|
|
p%precv(1)%base_a => a
|
|
p%precv(1)%base_desc => desc_a
|
|
|
|
if (info /= 0) then
|
|
call psb_errpush(4001,name,a_err='Base level precbuild.')
|
|
goto 9999
|
|
end if
|
|
|
|
else
|
|
info=4010
|
|
ch_err='size bpv'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
endif
|
|
|
|
if (iszv > 1) then
|
|
|
|
!
|
|
! Build the base preconditioners corresponding to the remaining
|
|
! levels
|
|
!
|
|
do i=2, iszv
|
|
!
|
|
! Check on the iprcparm contents: they should be the same
|
|
! on all processes.
|
|
!
|
|
if (me == psb_root_) ipv(:) = p%precv(i)%iprcparm(:)
|
|
call psb_bcast(ictxt,ipv)
|
|
if (any(ipv(:) /= p%precv(i)%iprcparm(:) )) then
|
|
write(debug_unit,*) me,name,&
|
|
&': Inconsistent arguments among processes, resetting.'
|
|
p%precv(i)%iprcparm(:) = ipv(:)
|
|
end if
|
|
|
|
!
|
|
! 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)%iprcparm(mld_coarse_mat_),'Coarse matrix',&
|
|
& mld_distr_mat_,is_distr_ml_coarse_mat)
|
|
|
|
else if (i == iszv) then
|
|
|
|
call check_coarse_lev(p%precv(i))
|
|
|
|
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)
|
|
!
|
|
call init_baseprec_av(p%precv(i)%prec,info)
|
|
if (info == 0) call mld_aggr_bld(p%precv(i-1)%base_a,&
|
|
& p%precv(i-1)%base_desc, p%precv(i),info)
|
|
|
|
if (info /= 0) then
|
|
call psb_errpush(4001,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)%nlaggr == p%precv(i-1)%nlaggr)) 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 /= 0) then
|
|
call psb_errpush(4010,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 mld_precfree(p%precv(i),info)
|
|
end do
|
|
call mld_move_alloc(t_prec,p,info)
|
|
! Ignore errors from transfer
|
|
info = 0
|
|
!
|
|
! 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
|
|
call check_coarse_lev(p%precv(i))
|
|
call init_baseprec_av(p%precv(i)%prec,info)
|
|
if (info == 0) call mld_aggr_bld(p%precv(i-1)%base_a,&
|
|
& p%precv(i-1)%base_desc, p%precv(i),info)
|
|
if (info /= 0) then
|
|
call psb_errpush(4010,name,a_err='coarse rebuild')
|
|
goto 9999
|
|
endif
|
|
end if
|
|
end if
|
|
|
|
do i=1, iszv
|
|
|
|
if (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& 'Calling mlprcbld at level ',i
|
|
select case(p%precv(i)%prec%iprcparm(mld_sub_solve_))
|
|
case(mld_ilu_n_,mld_milu_n_)
|
|
call mld_check_def(p%precv(i)%prec%iprcparm(mld_sub_fillin_),&
|
|
& 'Level',0,is_legal_ml_lev)
|
|
case(mld_ilu_t_)
|
|
call mld_check_def(p%precv(i)%prec%rprcparm(mld_sub_iluthrs_),&
|
|
& 'Eps',dzero,is_legal_fact_thrs)
|
|
end select
|
|
call mld_check_def(p%precv(i)%prec%iprcparm(mld_smoother_sweeps_),&
|
|
& 'Jacobi sweeps',1,is_legal_jac_sweeps)
|
|
|
|
call mld_baseprec_bld(p%precv(i)%base_a,p%precv(i)%base_desc,&
|
|
& p%precv(i)%prec,info)
|
|
|
|
if (info /= 0) then
|
|
call psb_errpush(4001,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 init_baseprec_av(p,info)
|
|
type(mld_zbaseprec_type), intent(inout) :: p
|
|
integer :: info
|
|
if (allocated(p%av)) then
|
|
if (size(p%av) /= mld_max_avsz_) then
|
|
deallocate(p%av,stat=info)
|
|
if (info /= 0) return
|
|
endif
|
|
end if
|
|
if (.not.(allocated(p%av))) then
|
|
allocate(p%av(mld_max_avsz_),stat=info)
|
|
if (info /= 0) return
|
|
end if
|
|
do k=1,size(p%av)
|
|
call psb_nullify_sp(p%av(k))
|
|
end do
|
|
|
|
end subroutine init_baseprec_av
|
|
|
|
subroutine check_coarse_lev(prec)
|
|
type(mld_z_interlev_prec_type) :: prec
|
|
|
|
!
|
|
! At the coarsest level, check mld_coarse_solve_
|
|
!
|
|
val = prec%iprcparm(mld_coarse_solve_)
|
|
select case (val)
|
|
case(mld_umf_, mld_slu_)
|
|
if ((prec%iprcparm(mld_coarse_mat_) /= mld_repl_mat_).or.&
|
|
& (prec%prec%iprcparm(mld_sub_solve_) /= val)) then
|
|
if (me == 0) write(debug_unit,*)&
|
|
& 'Warning: inconsistent coarse level specification.'
|
|
if (me == 0) write(debug_unit,*)&
|
|
& ' Resetting according to the value specified for mld_coarse_solve_.'
|
|
prec%iprcparm(mld_coarse_mat_) = mld_repl_mat_
|
|
prec%prec%iprcparm(mld_sub_solve_) = val
|
|
prec%prec%iprcparm(mld_smoother_type_) = mld_bjac_
|
|
end if
|
|
case(mld_sludist_)
|
|
if ((prec%iprcparm(mld_coarse_mat_) /= mld_distr_mat_).or.&
|
|
& (prec%prec%iprcparm(mld_sub_solve_) /= val)) then
|
|
if (me == 0) write(debug_unit,*)&
|
|
& 'Warning: inconsistent coarse level specification.'
|
|
if (me == 0) write(debug_unit,*)&
|
|
& ' Resetting according to the value specified for mld_coarse_solve_.'
|
|
prec%iprcparm(mld_coarse_mat_) = mld_distr_mat_
|
|
prec%prec%iprcparm(mld_sub_solve_) = val
|
|
prec%prec%iprcparm(mld_smoother_type_) = mld_bjac_
|
|
prec%prec%iprcparm(mld_smoother_sweeps_) = 1
|
|
end if
|
|
end select
|
|
end subroutine check_coarse_lev
|
|
|
|
end subroutine mld_zprecbld
|
|
|