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202 lines
7.5 KiB
Fortran
202 lines
7.5 KiB
Fortran
!
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!
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! MLD2P4 version 2.1
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! MultiLevel Domain Decomposition Parallel Preconditioners Package
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! based on PSBLAS (Parallel Sparse BLAS version 3.5)
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!
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! (C) Copyright 2008, 2010, 2012, 2015, 2017 , 2017
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!
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! Salvatore Filippone Cranfield University
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! Ambra Abdullahi Hassan University of Rome Tor Vergata
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! Pasqua D'Ambra IAC-CNR, Naples, IT
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! Daniela di Serafino University of Campania "L. Vanvitelli", Caserta, IT
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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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! File: mld_d_bcmatch_aggregator_tprol.f90
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!
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! Subroutine: mld_d_bcmatch_aggregator_tprol
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! Version: real
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!
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!
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subroutine mld_d_bcmatch_aggregator_build_tprol(ag,parms,a,desc_a,ilaggr,nlaggr,op_prol,info)
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use psb_base_mod
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use mld_d_prec_type
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use mld_d_bcmatch_aggregator_mod, mld_protect_name => mld_d_bcmatch_aggregator_build_tprol
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use mld_d_inner_mod
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use bcm_csr_type_mod
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use iso_c_binding
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implicit none
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class(mld_d_bcmatch_aggregator_type), target, intent(inout) :: ag
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type(mld_dml_parms), intent(inout) :: parms
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type(psb_dspmat_type), intent(in) :: a
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type(psb_desc_type), intent(in) :: desc_a
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integer(psb_ipk_), allocatable, intent(out) :: ilaggr(:),nlaggr(:)
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type(psb_dspmat_type), intent(out) :: op_prol
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integer(psb_ipk_), intent(out) :: info
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! Local variables
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real(psb_dpk_), allocatable:: valaggr(:)
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type(psb_dspmat_type) :: a_tmp
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type(bcm_CSRMatrix) :: C, P
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integer(c_int) :: match_algorithm, n_sweeps, max_csize, max_nlevels
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character(len=20) :: name, ch_err
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integer(psb_mpik_) :: ictxt, np, me
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integer(psb_ipk_) :: err_act, ierr
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integer(psb_ipk_) :: debug_level, debug_unit
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integer(psb_ipk_) :: i, j, k, nr, nc, isz, num_pcols
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type(psb_d_csr_sparse_mat), target :: acsr
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integer(psb_ipk_), allocatable, target :: csr_ia(:), csr_ja(:)
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integer(psb_ipk_), allocatable :: aux(:)
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real(psb_dpk_), allocatable, target:: csr_val(:)
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interface
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function bootCMatch(C,match_alg,n_sweeps,max_nlevels,max_csize,w)bind(c,name='bootCMatch') result(P)
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use iso_c_binding
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use bcm_csr_type_mod
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implicit none
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type(bcm_CSRMatrix) :: C, P
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type(bcm_Vector) :: w
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integer(c_int) :: match_alg
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integer(c_int) :: n_sweeps
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integer(c_int) :: max_nlevels
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integer(c_int) :: max_csize
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end function bootCMatch
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end interface
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interface
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function mld_bootCMatch_if(C,match_alg,n_sweeps,max_nlevels,max_csize,&
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& w,isz,ilaggr,valaggr, num_cols) &
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& bind(c,name='mld_bootCMatch_if') result(iret)
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use iso_c_binding
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use bcm_csr_type_mod
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implicit none
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type(bcm_CSRMatrix) :: C, P
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type(bcm_Vector) :: w
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integer(c_int), value :: match_alg
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integer(c_int), value :: n_sweeps
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integer(c_int), value :: max_nlevels
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integer(c_int), value :: max_csize
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integer(c_int), value :: isz
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integer(c_int) :: num_cols
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integer(c_int) :: ilaggr(*)
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real(c_double) :: valaggr(*)
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integer(c_int) :: iret
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end function mld_bootCMatch_if
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end interface
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name='mld_d_bcmatch_aggregator_tprol'
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ictxt = desc_a%get_context()
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call psb_info(ictxt,me,np)
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if (psb_get_errstatus().ne.0) return
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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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info = psb_success_
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call mld_check_def(parms%ml_cycle,'Multilevel cycle',&
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& mld_mult_ml_,is_legal_ml_cycle)
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call mld_check_def(parms%par_aggr_alg,'Aggregation',&
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& mld_dec_aggr_,is_legal_ml_par_aggr_alg)
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call mld_check_def(parms%aggr_ord,'Ordering',&
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& mld_aggr_ord_nat_,is_legal_ml_aggr_ord)
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call mld_check_def(parms%aggr_thresh,'Aggr_Thresh',dzero,is_legal_d_aggr_thrs)
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call a%csclip(b=a_tmp, info=info, jmax=a%get_nrows(), imax=a%get_nrows())
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call a_tmp%mv_to(acsr)
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nr = a%get_nrows()
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if (psb_size(ag%w_tmp) < nr) call ag%bld_default_w(nr)
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!write(*,*) 'Build_tprol:',acsr%get_nrows(),acsr%get_ncols()
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C%num_rows = acsr%get_nrows()
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C%num_cols = acsr%get_ncols()
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C%num_nonzeros = acsr%get_nzeros()
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C%owns_data = 0
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acsr%irp = acsr%irp - 1
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acsr%ja = acsr%ja - 1
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C%i = c_loc(acsr%irp)
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C%j = c_loc(acsr%ja)
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C%data = c_loc(acsr%val)
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isz = a%get_ncols()
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call psb_realloc(isz,ilaggr,info)
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if (info == psb_success_) call psb_realloc(isz,valaggr,info)
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if (info /= psb_success_) then
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info=psb_err_from_subroutine_
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ch_err='psb_realloc'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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match_algorithm = ag%matching_alg
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n_sweeps = ag%n_sweeps
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max_csize = ag%max_csize
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max_nlevels = ag%max_nlevels
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info = mld_bootCMatch_if(C,match_algorithm,n_sweeps,max_nlevels,max_csize,&
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& ag%w_par, isz, ilaggr, valaggr, num_pcols)
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if (info /= psb_success_) then
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!!$ write(0,*) 'On return from bootCMatch_if:',info
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call psb_errpush(psb_err_from_subroutine_,name,a_err='mld_bootCMatch_if')
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goto 9999
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end if
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!!$ write(0,*) 'On output from BootCMatch',nr,num_pcols,size(ilaggr),maxval(ilaggr),&
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!!$ & minval(ilaggr),minval(ilaggr(1:nr)),a%get_nrows(),a%get_ncols()
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! Prepare vector W for next level, just in case
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call ag%bld_wnxt(ilaggr(1:nr),valaggr(1:nr),num_pcols)
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call psb_realloc(np,nlaggr,info)
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if (info /= psb_success_) then
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info=psb_err_alloc_request_
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call psb_errpush(info,name,i_err=(/np,izero,izero,izero,izero/),&
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& a_err='integer')
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goto 9999
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end if
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call acsr%free()
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nlaggr(:)=0
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nlaggr(me+1) = num_pcols
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call psb_sum(ictxt,nlaggr(1:np))
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call mld_d_bcmatch_map_to_tprol(desc_a,ilaggr,nlaggr,valaggr,op_prol,info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,a_err='mld_bcmatch_map_to_tprol')
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goto 9999
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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_d_bcmatch_aggregator_build_tprol
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