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!!$
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!!$
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!!$ MLD2P4 version 2.0
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!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
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!!$ based on PSBLAS (Parallel Sparse BLAS version 3.3)
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!!$
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!!$ (C) Copyright 2008, 2010, 2012, 2015
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!!$
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!!$ Salvatore Filippone University of Rome Tor Vergata
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!!$ Alfredo Buttari CNRS-IRIT, Toulouse
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!!$ Pasqua D'Ambra ICAR-CNR, Naples
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!!$ Daniela di Serafino Second University of Naples
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!!$
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!!$ Redistribution and use in source and binary forms, with or without
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!!$ modification, are permitted provided that the following conditions
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!!$ are met:
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!!$ 1. Redistributions of source code must retain the above copyright
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!!$ notice, this list of conditions and the following disclaimer.
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!!$ 2. Redistributions in binary form must reproduce the above copyright
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!!$ notice, this list of conditions, and the following disclaimer in the
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!!$ documentation and/or other materials provided with the distribution.
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!!$ 3. The name of the MLD2P4 group or the names of its contributors may
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!!$ not be used to endorse or promote products derived from this
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!!$ software without specific written permission.
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!!$
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!!$ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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!!$ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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!!$ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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!!$ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE MLD2P4 GROUP OR ITS CONTRIBUTORS
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!!$ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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!!$ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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!!$ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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!!$ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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!!$ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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!!$ POSSIBILITY OF SUCH DAMAGE.
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!!$
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!!$
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subroutine mld_z_bld_mlhier_array(nplevs,a,desc_a,precv,info)
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use psb_base_mod
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use mld_z_inner_mod, mld_protect_name => mld_z_bld_mlhier_array
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use mld_z_prec_mod
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implicit none
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integer(psb_ipk_), intent(inout) :: nplevs
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type(psb_zspmat_type),intent(in), target :: a
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type(psb_desc_type), intent(inout), target :: desc_a
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type(mld_z_onelev_type),intent(inout), allocatable, target :: precv(:)
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integer(psb_ipk_), intent(out) :: info
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! Local
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integer(psb_ipk_) :: ictxt, me,np
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integer(psb_ipk_) :: err,i,k, err_act, newsz, iszv
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integer(psb_ipk_) :: ipv(mld_ifpsz_), val
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class(mld_z_base_smoother_type), allocatable :: coarse_sm, base_sm, med_sm
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type(mld_dml_parms) :: baseparms, medparms, coarseparms
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type(mld_z_onelev_type), allocatable :: tprecv(:)
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integer(psb_ipk_) :: int_err(5)
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integer(psb_ipk_) :: debug_level, debug_unit
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character(len=20) :: name, ch_err
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name = 'mld_bld_array_hierarchy'
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if (psb_get_errstatus().ne.0) return
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info=psb_success_
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err=0
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call psb_erractionsave(err_act)
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debug_unit = psb_get_debug_unit()
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debug_level = psb_get_debug_level()
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ictxt = desc_a%get_ctxt()
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call psb_info(ictxt,me,np)
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iszv = size(precv)
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coarseparms = precv(iszv)%parms
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baseparms = precv(1)%parms
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medparms = precv(2)%parms
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allocate(coarse_sm, source=precv(iszv)%sm,stat=info)
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if (info == psb_success_) &
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& allocate(med_sm, source=precv(2)%sm,stat=info)
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if (info == psb_success_) &
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& allocate(base_sm, source=precv(1)%sm,stat=info)
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if (info /= psb_success_) then
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write(0,*) 'Error in saving smoothers',info
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call psb_errpush(psb_err_internal_error_,name,a_err='Base level precbuild.')
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goto 9999
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end if
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!
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!
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! Build the matrix and the transfer operators corresponding
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! to the remaining levels
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!
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!
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! Check on the iprcparm contents: they should be the same
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! on all processes.
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!
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call psb_bcast(ictxt,precv(1)%parms)
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iszv = size(precv)
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!
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! First set desired number of levels
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!
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if (iszv /= nplevs) then
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allocate(tprecv(nplevs),stat=info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,&
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& a_err='prec reallocation')
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goto 9999
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endif
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tprecv(1)%parms = baseparms
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allocate(tprecv(1)%sm,source=base_sm,stat=info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,&
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& a_err='prec reallocation')
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goto 9999
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endif
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do i=2,nplevs-1
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tprecv(i)%parms = medparms
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allocate(tprecv(i)%sm,source=med_sm,stat=info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,&
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& a_err='prec reallocation')
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goto 9999
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endif
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end do
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tprecv(nplevs)%parms = coarseparms
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allocate(tprecv(nplevs)%sm,source=coarse_sm,stat=info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,&
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& a_err='prec reallocation')
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goto 9999
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endif
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do i=1,iszv
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call precv(i)%free(info)
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end do
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call move_alloc(tprecv,precv)
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iszv = size(precv)
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end if
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!
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! Finest level first; remember to fix base_a and base_desc
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!
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precv(1)%base_a => a
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precv(1)%base_desc => desc_a
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newsz = 0
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array_build_loop: do i=2, iszv
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!
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! Check on the iprcparm contents: they should be the same
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! on all processes.
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!
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call psb_bcast(ictxt,precv(i)%parms)
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!
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! Sanity checks on the parameters
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!
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if (i<iszv) then
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!
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! A replicated matrix only makes sense at the coarsest level
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!
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call mld_check_def(precv(i)%parms%coarse_mat,'Coarse matrix',&
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& mld_distr_mat_,is_distr_ml_coarse_mat)
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end if
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& 'Calling mlprcbld at level ',i
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!
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! Build the mapping between levels i-1 and i and the matrix
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! at level i
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!
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if (info == psb_success_) call mld_coarse_bld(precv(i-1)%base_a,&
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& precv(i-1)%base_desc, precv(i),info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_internal_error_,name,&
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& a_err='Init upper level preconditioner')
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goto 9999
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endif
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& 'Return from ',i,' call to mlprcbld ',info
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if (i>2) then
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if (all(precv(i)%map%naggr == precv(i-1)%map%naggr)) then
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newsz=i-1
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end if
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call psb_bcast(ictxt,newsz)
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if (newsz > 0) exit array_build_loop
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end if
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end do array_build_loop
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if (newsz > 0) then
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if (me == 0) then
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write(debug_unit,*) trim(name),&
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&': Warning: aggregates from level ',&
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& newsz
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write(debug_unit,*) trim(name),&
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&': to level ',&
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& iszv,' coincide.'
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write(debug_unit,*) trim(name),&
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&': Number of levels actually used :',newsz
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write(debug_unit,*)
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end if
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allocate(tprecv(newsz),stat=info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,&
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& a_err='prec reallocation')
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goto 9999
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endif
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do i=1,newsz-1
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call precv(i)%move_alloc(tprecv(i),info)
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end do
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call precv(iszv)%move_alloc(tprecv(newsz),info)
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do i=newsz+1, iszv
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call precv(i)%free(info)
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end do
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call move_alloc(tprecv,precv)
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! Ignore errors from transfer
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info = psb_success_
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!
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! Restart
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iszv = newsz
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! Fix the pointers, but the level 1 should
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! be already OK
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do i=2, iszv - 1
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precv(i)%base_a => precv(i)%ac
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precv(i)%base_desc => precv(i)%desc_ac
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precv(i)%map%p_desc_X => precv(i-1)%base_desc
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precv(i)%map%p_desc_Y => precv(i)%base_desc
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end do
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i = iszv
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if (info == psb_success_) call mld_coarse_bld(precv(i-1)%base_a,&
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& precv(i-1)%base_desc, precv(i),info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,a_err='coarse rebuild')
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goto 9999
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endif
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end if
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(err_act)
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return
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end subroutine mld_z_bld_mlhier_array
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