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amg4psblas/amgprec/impl/amg_c_extprol_bld.F90

537 lines
18 KiB
Fortran
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!
!
! AMG4PSBLAS version 1.0
! Algebraic Multigrid Package
! based on PSBLAS (Parallel Sparse BLAS version 3.7)
!
! (C) Copyright 2021
!
! Salvatore Filippone
! Pasqua D'Ambra
! Fabio Durastante
!
! 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 AMG4PSBLAS 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 AMG4PSBLAS 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: amg_c_extprol_bld.f90
!
! Subroutine: amg_c_extprol_bld
! Version: real
!
! This routine builds the preconditioner according to the requirements made by
! the user trough the subroutines amg_precinit and amg_precset.
!
! A multilevel preconditioner is regarded as an array of 'one-level' data structures,
! each containing the part of the preconditioner associated to a certain level,
! (for more details see the description of amg_Tonelev_type in amg_prec_type.f90).
! The levels are numbered in increasing order starting from the finest one, i.e.
! level 1 is the finest level. No transfer operators are associated to level 1.
!
!
! Arguments:
! a - type(psb_cspmat_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(amg_cprec_type), input/output.
! The preconditioner data structure containing the local part
! of the preconditioner to be built.
! info - integer, output.
! Error code.
!
! amold - class(psb_c_base_sparse_mat), input, optional
! Mold for the inner format of matrices contained in the
! preconditioner
!
!
! vmold - class(psb_c_base_vect_type), input, optional
! Mold for the inner format of vectors contained in the
! preconditioner
!
!
!
subroutine amg_c_extprol_bld(a,desc_a,p,prolv,restrv,info,amold,vmold,imold)
use psb_base_mod
use amg_c_inner_mod
use amg_c_prec_mod, amg_protect_name => amg_c_extprol_bld
Implicit None
! Arguments
type(psb_cspmat_type),intent(in), target :: a
type(psb_cspmat_type),intent(inout), target :: prolv(:)
type(psb_cspmat_type),intent(inout), target :: restrv(:)
type(psb_desc_type), intent(inout), target :: desc_a
type(amg_cprec_type),intent(inout),target :: p
integer(psb_ipk_), intent(out) :: info
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
! !$ character, intent(in), optional :: upd
! Local Variables
type(psb_ctxt_type) :: ctxt
integer(psb_ipk_) :: me,np
integer(psb_ipk_) :: err,i,k, err_act, iszv, newsz, casize, nplevs, mxplevs
integer(psb_ipk_) :: nprolv, nrestrv
real(psb_spk_) :: mnaggratio
integer(psb_ipk_) :: ipv(amg_ifpsz_), val
class(amg_c_base_smoother_type), allocatable :: coarse_sm, base_sm, med_sm
type(amg_sml_parms) :: baseparms, medparms, coarseparms
type(amg_c_onelev_type), allocatable :: tprecv(:)
integer(psb_ipk_) :: int_err(5)
character :: upd_
integer(psb_ipk_) :: debug_level, debug_unit
character(len=20) :: name, ch_err
logical, parameter :: debug=.false.
info=psb_success_
err=0
call psb_erractionsave(err_act)
if (psb_errstatus_fatal()) then
info = psb_err_internal_error_; goto 9999
end if
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
name = 'amg_c_extprol_bld'
info = psb_success_
int_err(1) = 0
ctxt = desc_a%get_context()
call psb_info(ctxt, me, np)
p%ctxt = ctxt
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& 'Entering '
#if defined(LPK8)
info=psb_err_internal_error_
call psb_errpush(info,name,a_err='Need fix for LPK8')
goto 9999
#else
!
! 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 amg_cprecinit
info=3111
call psb_errpush(info,name)
goto 9999
end if
!
! Check to ensure all procs have the same
!
newsz = -1
mxplevs = p%ag_data%max_levs
mnaggratio = p%ag_data%min_cr_ratio
casize = p%ag_data%min_coarse_size
iszv = size(p%precv)
nprolv = size(prolv)
nrestrv = size(restrv)
call psb_bcast(ctxt,iszv)
call psb_bcast(ctxt,casize)
call psb_bcast(ctxt,mxplevs)
call psb_bcast(ctxt,mnaggratio)
call psb_bcast(ctxt,nprolv)
call psb_bcast(ctxt,nrestrv)
if (casize /= p%ag_data%min_coarse_size) then
info=psb_err_internal_error_
call psb_errpush(info,name,a_err='Inconsistent min_coarse_size')
goto 9999
end if
if (mxplevs /= p%ag_data%max_levs) then
info=psb_err_internal_error_
call psb_errpush(info,name,a_err='Inconsistent max_levs')
goto 9999
end if
if (mnaggratio /= p%ag_data%min_cr_ratio) then
info=psb_err_internal_error_
call psb_errpush(info,name,a_err='Inconsistent min_cr_ratio')
goto 9999
end if
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 (nprolv /= size(prolv)) then
info=psb_err_internal_error_
call psb_errpush(info,name,a_err='Inconsistent size of prolv')
goto 9999
end if
if (nrestrv /= size(restrv)) then
info=psb_err_internal_error_
call psb_errpush(info,name,a_err='Inconsistent size of restrv')
goto 9999
end if
if (nrestrv /= nprolv) then
info=psb_err_internal_error_
call psb_errpush(info,name,a_err='Inconsistent size prolv vs restrv')
goto 9999
end if
if (iszv <= 1) then
! We should only ever get here for multilevel.
info=psb_err_from_subroutine_
ch_err='size bpv'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
endif
if (nrestrv < 1) then
! We should only ever get here for multilevel.
info=psb_err_from_subroutine_
ch_err='size restrv'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
endif
!
nplevs = nrestrv + 1
p%ag_data%max_levs = nplevs
!
! Fixed number of levels.
!
nplevs = max(itwo,mxplevs)
coarseparms = p%precv(iszv)%parms
baseparms = p%precv(1)%parms
medparms = p%precv(2)%parms
allocate(coarse_sm, source=p%precv(iszv)%sm,stat=info)
if (info == psb_success_) &
& allocate(med_sm, source=p%precv(2)%sm,stat=info)
if (info == psb_success_) &
& allocate(base_sm, source=p%precv(1)%sm,stat=info)
if (info /= psb_success_) then
write(0,*) 'Error in saving smoothers',info
call psb_errpush(psb_err_internal_error_,name,a_err='Base level precbuild.')
goto 9999
end if
if (iszv /= nplevs) then
allocate(tprecv(nplevs),stat=info)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,&
& a_err='prec reallocation')
goto 9999
endif
tprecv(1)%parms = baseparms
allocate(tprecv(1)%sm,source=base_sm,stat=info)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,&
& a_err='prec reallocation')
goto 9999
endif
do i=2,nplevs-1
tprecv(i)%parms = medparms
allocate(tprecv(i)%sm,source=med_sm,stat=info)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,&
& a_err='prec reallocation')
goto 9999
endif
end do
tprecv(nplevs)%parms = coarseparms
allocate(tprecv(nplevs)%sm,source=coarse_sm,stat=info)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,&
& a_err='prec reallocation')
goto 9999
endif
do i=1,iszv
call p%precv(i)%free(info)
end do
call move_alloc(tprecv,p%precv)
iszv = size(p%precv)
end if
!
! Finest level first; remember to fix base_a and base_desc
!
p%precv(1)%base_a => a
p%precv(1)%base_desc => desc_a
newsz = 0
array_build_loop: do i=2, iszv
!
! Sanity checks on the parameters
!
if (i<iszv) then
!
! A replicated matrix only makes sense at the coarsest level
!
call amg_check_def(p%precv(i)%parms%coarse_mat,'Coarse matrix',&
& amg_distr_mat_,is_distr_ml_coarse_mat)
end if
if (debug.and.(me==0)) write(0,*)name,' Building aggregation at level ',i
call amg_c_extaggr_bld(p%precv(i-1)%base_a,&
& p%precv(i-1)%base_desc,p%precv(i),restrv(i-1),prolv(i-1),info)
p%precv(i)%base_a => p%precv(i)%ac
p%precv(i)%base_desc => p%precv(i)%desc_ac
if (i>2) then
if (all(p%precv(i)%linmap%naggr == p%precv(i-1)%linmap%naggr)) then
newsz=i-1
end if
call psb_bcast(ctxt,newsz)
if (newsz > 0) exit array_build_loop
end if
end do array_build_loop
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='Internal extprol build' )
goto 9999
endif
iszv = size(p%precv)
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& 'Exiting with',iszv,' levels'
#endif
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
contains
subroutine amg_c_extaggr_bld(a,desc_a,p,op_restr,op_prol,info)
use psb_base_mod
use amg_c_inner_mod
implicit none
! Arguments
type(psb_cspmat_type), intent(in), target :: a
type(psb_cspmat_type), intent(inout) :: op_restr,op_prol
type(psb_desc_type), intent(in), target :: desc_a
type(amg_c_onelev_type), intent(inout),target :: p
integer(psb_ipk_), intent(out) :: info
! Local variables
character(len=20) :: name
type(psb_ctxt_type) :: ctxt
integer(psb_mpk_) :: np, me, ncol
integer(psb_ipk_) :: err_act,ntaggr,nzl
integer(psb_ipk_), allocatable :: ilaggr(:), nlaggr(:)
type(psb_cspmat_type) :: ac, am2, am3, am4
type(psb_c_coo_sparse_mat) :: acoo, bcoo
type(psb_c_csr_sparse_mat) :: acsr1
logical, parameter :: debug=.false.
name='amg_c_extaggr_bld'
call psb_erractionsave(err_act)
if (psb_errstatus_fatal()) then
info = psb_err_internal_error_; goto 9999
end if
info = psb_success_
ctxt = desc_a%get_context()
call psb_info(ctxt,me,np)
#if defined(LPK8)
info=psb_err_internal_error_
call psb_errpush(info,name,a_err='Need fix for LPK8')
goto 9999
#else
allocate(nlaggr(np),ilaggr(1))
nlaggr = 0
ilaggr = 0
p%parms%par_aggr_alg = amg_ext_aggr_
call amg_check_def(p%parms%ml_cycle,'Multilevel cycle',&
& amg_mult_ml_,is_legal_ml_cycle)
call amg_check_def(p%parms%coarse_mat,'Coarse matrix',&
& amg_distr_mat_,is_legal_ml_coarse_mat)
nlaggr(me+1) = op_restr%get_nrows()
if (op_restr%get_nrows() /= op_prol%get_ncols()) then
info=psb_err_internal_error_
call psb_errpush(info,name,a_err='Inconsistent restr/prol sizes')
goto 9999
end if
call psb_sum(ctxt,nlaggr)
ntaggr = sum(nlaggr)
ncol = desc_a%get_local_cols()
if (debug) write(0,*)me,' Sizes:',op_restr%get_nrows(),op_restr%get_ncols(),&
& op_prol%get_nrows(),op_prol%get_ncols(), a%get_nrows(),a%get_ncols()
!
! Compute local part of AC
!
call op_prol%clone(am2,info)
if (info == psb_success_) call psb_sphalo(am2,desc_a,am4,info,&
& colcnv=.false.,rowscale=.true.)
if (info == psb_success_) call psb_rwextd(ncol,am2,info,b=am4)
if (info == psb_success_) call am4%free()
call psb_spspmm(a,am2,am3,info)
if(info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='spspmm 2')
goto 9999
end if
call psb_sphalo(am3,desc_a,am4,info,&
& colcnv=.false.,rowscale=.true.)
if (info == psb_success_) call psb_rwextd(ncol,am3,info,b=am4)
if (info == psb_success_) call am4%free()
if(info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,a_err='Extend am3')
goto 9999
end if
call psb_spspmm(op_restr,am3,ac,info)
if (info == psb_success_) call am3%free()
if (info == psb_success_) call ac%cscnv(info,type='csr',dupl=psb_dupl_add_)
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,a_err='Build ac = op_restr x am3')
goto 9999
end if
select case(p%parms%coarse_mat)
case(amg_distr_mat_)
call ac%mv_to(bcoo)
nzl = bcoo%get_nzeros()
if (info == psb_success_) call psb_cdall(ctxt,p%desc_ac,info,nl=nlaggr(me+1))
if (info == psb_success_) call psb_cdins(nzl,bcoo%ia,bcoo%ja,p%desc_ac,info)
if (info == psb_success_) call psb_cdasb(p%desc_ac,info)
if (info == psb_success_) call psb_glob_to_loc(bcoo%ia(1:nzl),p%desc_ac,info,iact='I')
if (info == psb_success_) call psb_glob_to_loc(bcoo%ja(1:nzl),p%desc_ac,info,iact='I')
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='Creating p%desc_ac and converting ac')
goto 9999
end if
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& 'Assembld aux descr. distr.'
call p%ac%mv_from(bcoo)
call p%ac%set_nrows(p%desc_ac%get_local_rows())
call p%ac%set_ncols(p%desc_ac%get_local_cols())
call p%ac%set_asb()
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='psb_sp_free')
goto 9999
end if
if (np>1) then
call op_prol%mv_to(acsr1)
nzl = acsr1%get_nzeros()
call psb_glob_to_loc(acsr1%ja(1:nzl),p%desc_ac,info,'I')
if(info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='psb_glob_to_loc')
goto 9999
end if
call op_prol%mv_from(acsr1)
endif
call op_prol%set_ncols(p%desc_ac%get_local_cols())
if (np>1) then
call op_restr%cscnv(info,type='coo',dupl=psb_dupl_add_)
call op_restr%mv_to(acoo)
nzl = acoo%get_nzeros()
if (info == psb_success_) call psb_glob_to_loc(acoo%ia(1:nzl),p%desc_ac,info,'I')
call acoo%set_dupl(psb_dupl_add_)
if (info == psb_success_) call op_restr%mv_from(acoo)
if (info == psb_success_) call op_restr%cscnv(info,type='csr')
if(info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='Converting op_restr to local')
goto 9999
end if
end if
call op_restr%set_nrows(p%desc_ac%get_local_cols())
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& 'Done ac '
case(amg_repl_mat_)
!
!
call psb_cdall(ctxt,p%desc_ac,info,mg=ntaggr,repl=.true.)
if (info == psb_success_) call psb_cdasb(p%desc_ac,info)
if (info == psb_success_) &
& call psb_gather(p%ac,ac,p%desc_ac,info,dupl=psb_dupl_add_,keeploc=.false.)
if (info /= psb_success_) goto 9999
case default
info = psb_err_internal_error_
call psb_errpush(info,name,a_err='invalid amg_coarse_mat_')
goto 9999
end select
call p%ac%cscnv(info,type='csr',dupl=psb_dupl_add_)
if(info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='spcnv')
goto 9999
end if
!
! Copy the prolongation/restriction matrices into the descriptor map.
! op_restr => PR^T i.e. restriction operator
! op_prol => PR i.e. prolongation operator
!
p%linmap = psb_linmap(psb_map_aggr_,desc_a,&
& p%desc_ac,op_restr,op_prol,ilaggr,nlaggr)
if(info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='sp_Free')
goto 9999
end if
#endif
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine amg_c_extaggr_bld
end subroutine amg_c_extprol_bld
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