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243 lines
7.6 KiB
Fortran
243 lines
7.6 KiB
Fortran
!!$
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!!$
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!!$ MLD2P4 version 1.1
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!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
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!!$ based on PSBLAS (Parallel Sparse BLAS version 2.3.1)
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!!$
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!!$ (C) Copyright 2008,2009
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!!$
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!!$ Salvatore Filippone University of Rome Tor Vergata
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!!$ Alfredo Buttari University of Rome Tor Vergata
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!!$ Pasqua D'Ambra ICAR-CNR, Naples
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!!$ Daniela di Serafino Second University of Naples
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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_zprecbld.f90
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!
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! Subroutine: mld_zprecbld
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! Version: complex
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! Contains: subroutine init_baseprec_av
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!
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! This routine builds the preconditioner according to the requirements made by
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! the user through the subroutines mld_precinit and mld_precset.
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!
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!
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! Arguments:
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! a - type(psb_zspmat_type).
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! The sparse matrix structure containing the local part of the
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! matrix to be preconditioned.
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! desc_a - type(psb_desc_type), input.
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! The communication descriptor of a.
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! p - type(mld_zprec_type), input/output.
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! The preconditioner data structure containing the local part
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! of the preconditioner to be built.
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! info - integer, output.
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! Error code.
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!
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subroutine mld_zprecbld(a,desc_a,p,info)
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use psb_sparse_mod
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use mld_inner_mod
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use mld_prec_mod, mld_protect_name => mld_zprecbld
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Implicit None
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! Arguments
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type(psb_zspmat_type),intent(in), target :: a
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type(psb_desc_type), intent(in), target :: desc_a
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type(mld_zprec_type),intent(inout), target :: p
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integer, intent(out) :: info
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!!$ character, intent(in), optional :: upd
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! Local Variables
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type(mld_zprec_type) :: t_prec
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Integer :: err,i,k,ictxt, me,np, err_act, iszv, newsz
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integer :: ipv(mld_ifpsz_), val
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integer :: int_err(5)
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character :: upd_
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integer :: debug_level, debug_unit
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character(len=20) :: name, ch_err
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if(psb_get_errstatus().ne.0) return
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info=psb_success_
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err=0
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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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name = 'mld_zprecbld'
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info = psb_success_
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int_err(1) = 0
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ictxt = psb_cd_get_context(desc_a)
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call psb_info(ictxt, me, np)
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& 'Entering ',desc_a%matrix_data(:)
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!
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! For the time being we are commenting out the UPDATE argument
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! we plan to resurrect it later.
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!!$ if (present(upd)) then
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!!$ if (debug_level >= psb_debug_outer_) &
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!!$ & write(debug_unit,*) me,' ',trim(name),'UPD ', upd
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!!$
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!!$ if ((psb_toupper(upd).eq.'F').or.(psb_toupper(upd).eq.'T')) then
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!!$ upd_=psb_toupper(upd)
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!!$ else
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!!$ upd_='F'
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!!$ endif
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!!$ else
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!!$ upd_='F'
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!!$ endif
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upd_ = 'F'
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if (.not.allocated(p%precv)) then
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!! Error: should have called mld_zprecinit
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info=3111
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call psb_errpush(info,name)
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goto 9999
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end if
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!
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! Check to ensure all procs have the same
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!
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newsz = -1
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iszv = size(p%precv)
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call psb_bcast(ictxt,iszv)
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if (iszv /= size(p%precv)) then
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info=psb_err_internal_error_
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call psb_errpush(info,name,a_err='Inconsistent size of precv')
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goto 9999
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end if
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if (iszv <= 0) then
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! Is this really possible? probably not.
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info=psb_err_from_subroutine_
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ch_err='size bpv'
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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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!
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! Number of levels = 1
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!
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if (iszv == 1) then
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!
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! Check on the iprcparm contents: they should be the same
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! on all processes.
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!
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if (me == psb_root_) ipv(:) = p%precv(1)%iprcparm(:)
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call psb_bcast(ictxt,ipv)
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if (any(ipv(:) /= p%precv(1)%iprcparm(:) )) then
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write(debug_unit,*) me,name,&
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&': Inconsistent arguments among processes, forcing a default'
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p%precv(1)%iprcparm(:) = ipv(:)
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end if
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!
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! Remember to fix base_a and base_desc
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!
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call init_baseprec_av(p%precv(1)%prec,info)
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p%precv(1)%base_a => a
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p%precv(1)%base_desc => desc_a
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if (info /= psb_success_) then
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call psb_errpush(psb_err_internal_error_,name,a_err='Base level precbuild.')
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goto 9999
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end if
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!
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! Build the base preconditioner
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!
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select case(p%precv(1)%prec%iprcparm(mld_sub_solve_))
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case(mld_ilu_n_,mld_milu_n_)
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call mld_check_def(p%precv(1)%prec%iprcparm(mld_sub_fillin_),&
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& 'Level',0,is_legal_ml_lev)
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case(mld_ilu_t_)
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call mld_check_def(p%precv(1)%prec%rprcparm(mld_sub_iluthrs_),&
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& 'Eps',dzero,is_legal_fact_thrs)
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end select
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call mld_check_def(p%precv(1)%prec%iprcparm(mld_smoother_sweeps_),&
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& 'Jacobi sweeps',1,is_legal_jac_sweeps)
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call mld_baseprec_bld(p%precv(1)%base_a,p%precv(1)%base_desc,&
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& p%precv(1)%prec,info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_internal_error_,name,a_err='One level preconditioner build.')
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goto 9999
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endif
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!
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! Number of levels > 1
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!
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else if (iszv > 1) then
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!
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! Build the multilevel preconditioner
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!
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call mld_mlprec_bld(a,desc_a,p,info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_internal_error_,name,a_err='Multilevel preconditioner build.')
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goto 9999
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endif
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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 continue
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call psb_erractionrestore(err_act)
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if (err_act.eq.psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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contains
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subroutine init_baseprec_av(p,info)
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type(mld_zbaseprec_type), intent(inout) :: p
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integer :: info
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if (allocated(p%av)) then
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if (size(p%av) /= mld_max_avsz_) then
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deallocate(p%av,stat=info)
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if (info /= psb_success_) return
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endif
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end if
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if (.not.(allocated(p%av))) then
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allocate(p%av(mld_max_avsz_),stat=info)
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if (info /= psb_success_) return
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end if
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do k=1,size(p%av)
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call psb_nullify_sp(p%av(k))
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end do
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end subroutine init_baseprec_av
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end subroutine mld_zprecbld
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