!!$ !!$ !!$ 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. !!$ !!$ ! 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 through the subroutines mld_precinit and mld_precset. ! ! ! 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,amold,vmold,imold) use psb_base_mod use mld_z_inner_mod use mld_z_prec_mod, mld_protect_name => mld_zprecbld Implicit None ! Arguments type(psb_zspmat_type),intent(in), target :: a type(psb_desc_type), intent(inout), target :: desc_a type(mld_zprec_type),intent(inout), target :: p integer(psb_ipk_), intent(out) :: info class(psb_z_base_sparse_mat), intent(in), optional :: amold class(psb_z_base_vect_type), intent(in), optional :: vmold class(psb_i_base_vect_type), intent(in), optional :: imold !!$ character, intent(in), optional :: upd ! Local Variables type(mld_zprec_type) :: t_prec integer(psb_ipk_) :: ictxt, me,np integer(psb_ipk_) :: err,i,k,err_act, iszv, newsz integer(psb_ipk_) :: ipv(mld_ifpsz_), val integer(psb_ipk_) :: int_err(5) character :: upd_ type(mld_dml_parms) :: prm 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_zprecbld' info = psb_success_ int_err(1) = 0 ictxt = desc_a%get_context() call psb_info(ictxt, me, np) p%ictxt = ictxt 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_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=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. ! call psb_bcast(ictxt,p%precv(1)%parms) 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 call p%precv(1)%check(info) if (info /= psb_success_) then write(0,*) ' Smoother check error',info call psb_errpush(psb_err_internal_error_,name,& & a_err='One level preconditioner check.') goto 9999 endif call p%precv(1)%sm%build(a,desc_a,upd_,info,& & amold=amold,vmold=vmold,imold=imold) if (info /= psb_success_) then 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,& & amold=amold,vmold=vmold,imold=imold) 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 call psb_error_handler(err_act) return end subroutine mld_zprecbld