! ! ! 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 University of Campania "L. Vanvitelli", Caserta ! ! 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_z_lev_aggrmap_bld.f90 ! ! Subroutine: mld_z_lev_aggrmap_bld ! Version: complex ! ! This routine is just an interface to aggrmap_bld where the real work is performed. ! It takes care of some consistency checking though. ! ! See mld_zaggrmap_bld for constraints on input/oput arguments. ! ! ! Arguments: ! p - type(mld_z_onelev_type), input/output. ! The 'one-level' data structure containing the control ! parameters and (eventually) coarse matrix and prolongator/restrictors. ! ! a - type(psb_zspmat_type). ! The sparse matrix structure containing the local part of the ! fine-level matrix. ! desc_a - type(psb_desc_type), input. ! The communication descriptor of a. ! ilaggr - integer, dimension(:), allocatable, output ! The mapping between the row indices of the coarse-level ! matrix and the row indices of the fine-level matrix. ! ilaggr(i)=j means that node i in the adjacency graph ! of the fine-level matrix is mapped onto node j in the ! adjacency graph of the coarse-level matrix. Note that on exit the indices ! will be shifted so as to make sure the ranges on the various processes do not ! overlap. ! nlaggr - integer, dimension(:), allocatable, output ! nlaggr(i) contains the aggregates held by process i. ! op_prol - type(psb_zspmat_type), output ! The tentative prolongator, based on ilaggr. ! ! info - integer, output. ! Error code. ! subroutine mld_z_lev_aggrmap_bld(p,a,desc_a,ilaggr,nlaggr,op_prol,info) use psb_base_mod use mld_base_prec_type use mld_z_inner_mod, mld_protect_name => mld_z_lev_aggrmap_bld implicit none ! Arguments type(mld_z_onelev_type), intent(inout), target :: p type(psb_zspmat_type), intent(in) :: a type(psb_desc_type), intent(in) :: desc_a integer(psb_ipk_), allocatable, intent(out) :: ilaggr(:),nlaggr(:) type(psb_zspmat_type), intent(out) :: op_prol integer(psb_ipk_), intent(out) :: info ! Local variables character(len=20) :: name integer(psb_mpik_) :: ictxt, np, me integer(psb_ipk_) :: err_act integer(psb_ipk_) :: nzl, ntaggr integer(psb_ipk_) :: debug_level, debug_unit name='mld_z_lev_aggrmap_bld' if (psb_get_errstatus().ne.0) return call psb_erractionsave(err_act) debug_unit = psb_get_debug_unit() debug_level = psb_get_debug_level() info = psb_success_ ictxt = desc_a%get_context() call psb_info(ictxt,me,np) call mld_check_def(p%parms%ml_cycle,'Multilevel cycle',& & mld_mult_ml_,is_legal_ml_cycle) call mld_check_def(p%parms%par_aggr_alg,'Aggregation',& & mld_dec_aggr_,is_legal_ml_par_aggr_alg) call mld_check_def(p%parms%aggr_ord,'Ordering',& & mld_aggr_ord_nat_,is_legal_ml_aggr_ord) call mld_check_def(p%parms%aggr_thresh,'Aggr_Thresh',dzero,is_legal_d_aggr_thrs) select case(p%parms%par_aggr_alg) case (mld_dec_aggr_, mld_sym_dec_aggr_) ! ! Build a mapping between the row indices of the fine-level matrix ! and the row indices of the coarse-level matrix, according to a decoupled ! aggregation algorithm. This also defines a tentative prolongator from ! the coarse to the fine level. ! call mld_aggrmap_bld(p%parms%par_aggr_alg,p%parms%aggr_ord,p%parms%aggr_thresh,& & a,desc_a,ilaggr,nlaggr,op_prol,info) if (info /= psb_success_) then call psb_errpush(psb_err_from_subroutine_,name,a_err='mld_aggrmap_bld') goto 9999 end if case (mld_bcmatch_aggr_) write(0,*) 'Matching is not implemented yet ' info = -1111 call psb_errpush(psb_err_input_value_invalid_i_,name,& & i_err=(/ione,p%parms%par_aggr_alg,izero,izero,izero/)) goto 9999 case default info = -1 call psb_errpush(psb_err_input_value_invalid_i_,name,& & i_err=(/ione,p%parms%par_aggr_alg,izero,izero,izero/)) goto 9999 end select call psb_erractionrestore(err_act) return 9999 call psb_error_handler(err_act) return end subroutine mld_z_lev_aggrmap_bld