!!$ !!$ !!$ MLD2P4 version 2.1 !!$ MultiLevel Domain Decomposition Parallel Preconditioners Package !!$ based on PSBLAS (Parallel Sparse BLAS version 3.4) !!$ !!$ (C) Copyright 2008, 2010, 2012, 2015, 2017 !!$ !!$ Salvatore Filippone Cranfield University !!$ Ambra Abdullahi Hassan 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. !!$ !!$ subroutine mld_c_ilu_solver_bld(a,desc_a,sv,upd,info,b,amold,vmold,imold) use psb_base_mod use mld_c_ilu_solver, mld_protect_name => mld_c_ilu_solver_bld Implicit None ! Arguments type(psb_cspmat_type), intent(in), target :: a Type(psb_desc_type), Intent(in) :: desc_a class(mld_c_ilu_solver_type), intent(inout) :: sv character, intent(in) :: upd integer(psb_ipk_), intent(out) :: info type(psb_cspmat_type), intent(in), target, optional :: b class(psb_c_base_sparse_mat), intent(in), optional :: amold class(psb_c_base_vect_type), intent(in), optional :: vmold class(psb_i_base_vect_type), intent(in), optional :: imold ! Local variables integer(psb_ipk_) :: n_row,n_col, nrow_a, nztota !!$ complex(psb_spk_), pointer :: ww(:), aux(:), tx(:),ty(:) integer(psb_ipk_) :: ictxt,np,me,i, err_act, debug_unit, debug_level character(len=20) :: name='c_ilu_solver_bld', ch_err info=psb_success_ call psb_erractionsave(err_act) debug_unit = psb_get_debug_unit() debug_level = psb_get_debug_level() ictxt = desc_a%get_context() call psb_info(ictxt, me, np) if (debug_level >= psb_debug_outer_) & & write(debug_unit,*) me,' ',trim(name),' start' n_row = desc_a%get_local_rows() if (psb_toupper(upd) == 'F') then nrow_a = a%get_nrows() nztota = a%get_nzeros() if (present(b)) then nztota = nztota + b%get_nzeros() end if call sv%l%csall(n_row,n_row,info,nztota) if (info == psb_success_) call sv%u%csall(n_row,n_row,info,nztota) if(info /= psb_success_) then info=psb_err_from_subroutine_ ch_err='psb_sp_all' call psb_errpush(info,name,a_err=ch_err) goto 9999 end if if (allocated(sv%d)) then if (size(sv%d) < n_row) then deallocate(sv%d) endif endif if (.not.allocated(sv%d)) allocate(sv%d(n_row),stat=info) if (info /= psb_success_) then call psb_errpush(psb_err_from_subroutine_,name,a_err='Allocate') goto 9999 endif select case(sv%fact_type) case (mld_ilu_t_) ! ! ILU(k,t) ! select case(sv%fill_in) case(:-1) ! Error: fill-in <= -1 call psb_errpush(psb_err_input_value_invalid_i_,& & name,i_err=(/ithree,sv%fill_in,izero,izero,izero/)) goto 9999 case(0:) ! Fill-in >= 0 call mld_ilut_fact(sv%fill_in,sv%thresh,& & a, sv%l,sv%u,sv%d,info,blck=b) end select if(info /= psb_success_) then info=psb_err_from_subroutine_ ch_err='mld_ilut_fact' call psb_errpush(info,name,a_err=ch_err) goto 9999 end if case(mld_ilu_n_,mld_milu_n_) ! ! ILU(k) and MILU(k) ! select case(sv%fill_in) case(:-1) ! Error: fill-in <= -1 call psb_errpush(psb_err_input_value_invalid_i_,& & name,i_err=(/ithree,sv%fill_in,izero,izero,izero/)) goto 9999 case(0) ! Fill-in 0 ! Separate implementation of ILU(0) for better performance. ! There seems to be a problem with the separate implementation of MILU(0), ! contained into mld_ilu0_fact. This must be investigated. For the time being, ! resort to the implementation of MILU(k) with k=0. if (sv%fact_type == mld_ilu_n_) then call mld_ilu0_fact(sv%fact_type,a,sv%l,sv%u,& & sv%d,info,blck=b,upd=upd) else call mld_iluk_fact(sv%fill_in,sv%fact_type,& & a,sv%l,sv%u,sv%d,info,blck=b) endif case(1:) ! Fill-in >= 1 ! The same routine implements both ILU(k) and MILU(k) call mld_iluk_fact(sv%fill_in,sv%fact_type,& & a,sv%l,sv%u,sv%d,info,blck=b) end select if (info /= psb_success_) then info=psb_err_from_subroutine_ ch_err='mld_iluk_fact' call psb_errpush(info,name,a_err=ch_err) goto 9999 end if case default ! If we end up here, something was wrong up in the call chain. info = psb_err_input_value_invalid_i_ call psb_errpush(psb_err_input_value_invalid_i_,name,& & i_err=(/ithree,sv%fact_type,izero,izero,izero/)) goto 9999 end select else ! Here we should add checks for reuse of L and U. ! For the time being just throw an error. info = 31 call psb_errpush(info, name,& & i_err=(/ithree,izero,izero,izero,izero/),a_err=upd) goto 9999 ! ! What is an update of a factorization?? ! A first attempt could be to reuse EXACTLY the existing indices ! as if it was an ILU(0) (since, effectively, the sparsity pattern ! should not grow beyond what is already there). ! call mld_ilu0_fact(sv%fact_type,a,& & sv%l,sv%u,& & sv%d,info,blck=b,upd=upd) end if call sv%l%set_asb() call sv%l%trim() call sv%u%set_asb() call sv%u%trim() call sv%dv%bld(sv%d,mold=vmold) if (present(amold)) then call sv%l%cscnv(info,mold=amold) call sv%u%cscnv(info,mold=amold) end if if (debug_level >= psb_debug_outer_) & & write(debug_unit,*) me,' ',trim(name),' end' call psb_erractionrestore(err_act) return 9999 call psb_error_handler(err_act) return end subroutine mld_c_ilu_solver_bld