!!$ !!$ !!$ MLD2P4 version 2.0 !!$ MultiLevel Domain Decomposition Parallel Preconditioners Package !!$ based on PSBLAS (Parallel Sparse BLAS version 3.0) !!$ !!$ (C) Copyright 2008,2009,2010 !!$ !!$ 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_dprecbld.f90 ! ! Subroutine: mld_dprecbld ! Version: real ! Contains: subroutine init_baseprec_av ! ! This routine builds the preconditioner according to the requirements made by ! the user through the subroutines mld_precinit and mld_precset. ! ! ! 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. ! subroutine mld_dprecbld(a,desc_a,p,info) use psb_sparse_mod use mld_inner_mod use mld_prec_mod, mld_protect_name => mld_dprecbld use mld_d_jac_smoother use mld_d_as_smoother use mld_d_diag_solver use mld_d_ilu_solver 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, intent(out) :: info !!$ character, intent(in), optional :: upd ! Local Variables type(mld_dprec_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=psb_success_ err=0 call psb_erractionsave(err_act) debug_unit = psb_get_debug_unit() debug_level = psb_get_debug_level() name = 'mld_dprecbld' info = psb_success_ int_err(1) = 0 ictxt = psb_cd_get_context(desc_a) call psb_info(ictxt, me, np) p%ictxt = ictxt 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_dprecinit 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=psb_err_internal_error_ call psb_errpush(info,name,a_err='Inconsistent size of precv') goto 9999 end if if (iszv <= 0) then ! Is this really possible? probably not. info=psb_err_from_subroutine_ ch_err='size bpv' call psb_errpush(info,name,a_err=ch_err) goto 9999 end if ! ! Number of levels = 1 ! 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 ! ! 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 /= psb_success_) then call psb_errpush(psb_err_internal_error_,name,a_err='Base level precbuild.') goto 9999 end if ! ! Build the base preconditioner ! select case(p%precv(1)%prec%iprcparm(mld_sub_solve_)) case(mld_ilu_n_,mld_milu_n_) call mld_check_def(p%precv(1)%prec%iprcparm(mld_sub_fillin_),& & 'Level',0,is_legal_ml_lev) case(mld_ilu_t_) call mld_check_def(p%precv(1)%prec%rprcparm(mld_sub_iluthrs_),& & 'Eps',dzero,is_legal_fact_thrs) end select call mld_check_def(p%precv(1)%iprcparm(mld_smoother_sweeps_),& & 'Jacobi sweeps',1,is_legal_jac_sweeps) ! ! Test version for beginning of OO stuff. ! if (allocated(p%precv(1)%sm)) then call p%precv(1)%sm%free(info) if (info == psb_success_) deallocate(p%precv(1)%sm,stat=info) if (info /= psb_success_) then call psb_errpush(psb_err_alloc_dealloc_,name,a_err='One level preconditioner build.') goto 9999 endif end if select case (p%precv(1)%prec%iprcparm(mld_smoother_type_)) case(mld_jac_, mld_bjac_) allocate(mld_d_jac_smoother_type :: p%precv(1)%sm, stat=info) case(mld_as_) allocate(mld_d_as_smoother_type :: p%precv(1)%sm, stat=info) case default info = -1 end select if (info /= psb_success_) then write(0,*) ' Smoother allocation error',info,& & p%precv(1)%prec%iprcparm(mld_smoother_type_) call psb_errpush(psb_err_internal_error_,name,a_err='One level preconditioner build.') goto 9999 endif call p%precv(1)%sm%set(mld_sub_restr_,p%precv(1)%prec%iprcparm(mld_sub_restr_),info) call p%precv(1)%sm%set(mld_sub_prol_,p%precv(1)%prec%iprcparm(mld_sub_prol_),info) call p%precv(1)%sm%set(mld_sub_ovr_,p%precv(1)%prec%iprcparm(mld_sub_ovr_),info) select case (p%precv(1)%prec%iprcparm(mld_sub_solve_)) case(mld_ilu_n_,mld_milu_n_,mld_ilu_t_) allocate(mld_d_ilu_solver_type :: p%precv(1)%sm%sv, stat=info) if (info == psb_success_) call p%precv(1)%sm%sv%set(mld_sub_solve_,& & p%precv(1)%prec%iprcparm(mld_sub_solve_),info) if (info == psb_success_) call p%precv(1)%sm%sv%set(mld_sub_fillin_,& & p%precv(1)%prec%iprcparm(mld_sub_fillin_),info) if (info == psb_success_) call p%precv(1)%sm%sv%set(mld_sub_iluthrs_,& & p%precv(1)%prec%rprcparm(mld_sub_iluthrs_),info) case(mld_diag_scale_) allocate(mld_d_diag_solver_type :: p%precv(1)%sm%sv, stat=info) case default info = -1 end select if (info /= psb_success_) then write(0,*) ' Solver allocation error',info,& & p%precv(1)%prec%iprcparm(mld_sub_solve_) call psb_errpush(psb_err_internal_error_,name,a_err='One level preconditioner build.') goto 9999 endif call p%precv(1)%sm%build(a,desc_a,upd_,info) if (info /= psb_success_) then write(0,*) ' Smoother build error',info call psb_errpush(psb_err_internal_error_,name,a_err='One level preconditioner build.') goto 9999 endif ! ! Number of levels > 1 ! else if (iszv > 1) then ! ! Build the multilevel preconditioner ! call mld_mlprec_bld(a,desc_a,p,info) if (info /= psb_success_) then call psb_errpush(psb_err_internal_error_,name,a_err='Multilevel preconditioner build.') goto 9999 endif end if 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_dbaseprec_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 /= psb_success_) return !!$ endif !!$ end if !!$ if (.not.(allocated(p%av))) then !!$ allocate(p%av(mld_max_avsz_),stat=info) !!$ if (info /= psb_success_) return !!$ end if !!$ do k=1,size(p%av) !!$ call psb_nullify_sp(p%av(k)) !!$ end do end subroutine init_baseprec_av end subroutine mld_dprecbld