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amg4psblas/mlprec/mld_c_ilu_solver.f90

689 lines
20 KiB
Fortran

!!$
!!$
!!$ MLD2P4 version 2.0
!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
!!$ based on PSBLAS (Parallel Sparse BLAS version 3.0)
!!$
!!$ (C) Copyright 2008,2009,2010, 2010
!!$
!!$ Salvatore Filippone 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.
!!$
!!$
!
!
!
!
!
!
module mld_c_ilu_solver
use mld_c_prec_type
use mld_c_ilu_fact_mod
type, extends(mld_c_base_solver_type) :: mld_c_ilu_solver_type
type(psb_cspmat_type) :: l, u
complex(psb_spk_), allocatable :: d(:)
integer :: fact_type, fill_in
real(psb_spk_) :: thresh
contains
procedure, pass(sv) :: dump => c_ilu_solver_dmp
procedure, pass(sv) :: build => c_ilu_solver_bld
procedure, pass(sv) :: apply => c_ilu_solver_apply
procedure, pass(sv) :: free => c_ilu_solver_free
procedure, pass(sv) :: seti => c_ilu_solver_seti
procedure, pass(sv) :: setc => c_ilu_solver_setc
procedure, pass(sv) :: setr => c_ilu_solver_setr
procedure, pass(sv) :: descr => c_ilu_solver_descr
procedure, pass(sv) :: sizeof => c_ilu_solver_sizeof
procedure, pass(sv) :: default => c_ilu_solver_default
end type mld_c_ilu_solver_type
private :: c_ilu_solver_bld, c_ilu_solver_apply, &
& c_ilu_solver_free, c_ilu_solver_seti, &
& c_ilu_solver_setc, c_ilu_solver_setr,&
& c_ilu_solver_descr, c_ilu_solver_sizeof, &
& c_ilu_solver_default, c_ilu_solver_dmp
character(len=15), parameter, private :: &
& fact_names(0:mld_slv_delta_+4)=(/&
& 'none ','none ',&
& 'none ','none ',&
& 'none ','DIAG ?? ',&
& 'ILU(n) ',&
& 'MILU(n) ','ILU(t,n) '/)
contains
subroutine c_ilu_solver_default(sv)
use psb_sparse_mod
Implicit None
! Arguments
class(mld_c_ilu_solver_type), intent(inout) :: sv
sv%fact_type = mld_ilu_n_
sv%fill_in = 0
sv%thresh = szero
return
end subroutine c_ilu_solver_default
subroutine c_ilu_solver_check(sv,info)
use psb_sparse_mod
Implicit None
! Arguments
class(mld_c_ilu_solver_type), intent(inout) :: sv
integer, intent(out) :: info
Integer :: err_act
character(len=20) :: name='c_ilu_solver_check'
call psb_erractionsave(err_act)
info = psb_success_
call mld_check_def(sv%fact_type,&
& 'Factorization',mld_ilu_n_,is_legal_ilu_fact)
select case(sv%fact_type)
case(mld_ilu_n_,mld_milu_n_)
call mld_check_def(sv%fill_in,&
& 'Level',0,is_legal_ml_lev)
case(mld_ilu_t_)
call mld_check_def(sv%thresh,&
& 'Eps',szero,is_legal_s_fact_thrs)
end select
if (info /= psb_success_) goto 9999
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine c_ilu_solver_check
subroutine c_ilu_solver_apply(alpha,sv,x,beta,y,desc_data,trans,work,info)
use psb_sparse_mod
type(psb_desc_type), intent(in) :: desc_data
class(mld_c_ilu_solver_type), intent(in) :: sv
complex(psb_spk_),intent(inout) :: x(:)
complex(psb_spk_),intent(inout) :: y(:)
complex(psb_spk_),intent(in) :: alpha,beta
character(len=1),intent(in) :: trans
complex(psb_spk_),target, intent(inout) :: work(:)
integer, intent(out) :: info
integer :: n_row,n_col
complex(psb_spk_), pointer :: ww(:), aux(:), tx(:),ty(:)
integer :: ictxt,np,me,i, err_act
character :: trans_
character(len=20) :: name='c_ilu_solver_apply'
call psb_erractionsave(err_act)
info = psb_success_
trans_ = psb_toupper(trans)
select case(trans_)
case('N')
case('T','C')
case default
call psb_errpush(psb_err_iarg_invalid_i_,name)
goto 9999
end select
n_row = psb_cd_get_local_rows(desc_data)
n_col = psb_cd_get_local_cols(desc_data)
if (n_col <= size(work)) then
ww => work(1:n_col)
if ((4*n_col+n_col) <= size(work)) then
aux => work(n_col+1:)
else
allocate(aux(4*n_col),stat=info)
if (info /= psb_success_) then
info=psb_err_alloc_request_
call psb_errpush(info,name,i_err=(/4*n_col,0,0,0,0/),&
& a_err='complex(psb_spk_)')
goto 9999
end if
endif
else
allocate(ww(n_col),aux(4*n_col),stat=info)
if (info /= psb_success_) then
info=psb_err_alloc_request_
call psb_errpush(info,name,i_err=(/5*n_col,0,0,0,0/),&
& a_err='complex(psb_spk_)')
goto 9999
end if
endif
select case(trans_)
case('N')
call psb_spsm(cone,sv%l,x,czero,ww,desc_data,info,&
& trans=trans_,scale='L',diag=sv%d,choice=psb_none_,work=aux)
if (info == psb_success_) call psb_spsm(alpha,sv%u,ww,beta,y,desc_data,info,&
& trans=trans_,scale='U',choice=psb_none_, work=aux)
case('T','C')
call psb_spsm(cone,sv%u,x,czero,ww,desc_data,info,&
& trans=trans_,scale='L',diag=sv%d,choice=psb_none_,work=aux)
if (info == psb_success_) call psb_spsm(alpha,sv%l,ww,beta,y,desc_data,info,&
& trans=trans_,scale='U',choice=psb_none_,work=aux)
case default
call psb_errpush(psb_err_internal_error_,name,a_err='Invalid TRANS in ILU subsolve')
goto 9999
end select
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,a_err='Error in subsolve')
goto 9999
endif
if (n_col <= size(work)) then
if ((4*n_col+n_col) <= size(work)) then
else
deallocate(aux)
endif
else
deallocate(ww,aux)
endif
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine c_ilu_solver_apply
subroutine c_ilu_solver_bld(a,desc_a,sv,upd,info,b)
use psb_sparse_mod
Implicit None
! Arguments
type(psb_cspmat_type), intent(in), target :: a
Type(psb_desc_type), Intent(in) :: desc_a
class(mld_c_ilu_solver_type), intent(inout) :: sv
character, intent(in) :: upd
integer, intent(out) :: info
type(psb_cspmat_type), intent(in), target, optional :: b
! Local variables
integer :: n_row,n_col, nrow_a, nztota
complex(psb_spk_), pointer :: ww(:), aux(:), tx(:),ty(:)
integer :: ictxt,np,me,i, err_act, debug_unit, debug_level
character(len=20) :: name='c_ilu_solver_bld', ch_err
info=psb_success_
call psb_erractionsave(err_act)
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
ictxt = psb_cd_get_context(desc_a)
call psb_info(ictxt, me, np)
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),' start'
n_row = psb_cd_get_local_rows(desc_a)
if (psb_toupper(upd) == 'F') then
nrow_a = a%get_nrows()
nztota = a%get_nzeros()
if (present(b)) then
nztota = nztota + b%get_nzeros()
end if
call sv%l%csall(n_row,n_row,info,nztota)
if (info == psb_success_) call sv%u%csall(n_row,n_row,info,nztota)
if(info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='psb_sp_all'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
if (allocated(sv%d)) then
if (size(sv%d) < n_row) then
deallocate(sv%d)
endif
endif
if (.not.allocated(sv%d)) then
allocate(sv%d(n_row),stat=info)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='Allocate')
goto 9999
end if
endif
select case(sv%fact_type)
case (mld_ilu_t_)
!
! ILU(k,t)
!
select case(sv%fill_in)
case(:-1)
! Error: fill-in <= -1
call psb_errpush(psb_err_input_value_invalid_i_,&
& name,i_err=(/3,sv%fill_in,0,0,0/))
goto 9999
case(0:)
! Fill-in >= 0
call mld_ilut_fact(sv%fill_in,sv%thresh,&
& a, sv%l,sv%u,sv%d,info,blck=b)
end select
if(info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='mld_ilut_fact'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
case(mld_ilu_n_,mld_milu_n_)
!
! ILU(k) and MILU(k)
!
select case(sv%fill_in)
case(:-1)
! Error: fill-in <= -1
call psb_errpush(psb_err_input_value_invalid_i_,&
& name,i_err=(/3,sv%fill_in,0,0,0/))
goto 9999
case(0)
! Fill-in 0
! Separate implementation of ILU(0) for better performance.
! There seems to be a problem with the separate implementation of MILU(0),
! contained into mld_ilu0_fact. This must be investigated. For the time being,
! resort to the implementation of MILU(k) with k=0.
if (sv%fact_type == mld_ilu_n_) then
call mld_ilu0_fact(sv%fact_type,a,sv%l,sv%u,&
& sv%d,info,blck=b,upd=upd)
else
call mld_iluk_fact(sv%fill_in,sv%fact_type,&
& a,sv%l,sv%u,sv%d,info,blck=b)
endif
case(1:)
! Fill-in >= 1
! The same routine implements both ILU(k) and MILU(k)
call mld_iluk_fact(sv%fill_in,sv%fact_type,&
& a,sv%l,sv%u,sv%d,info,blck=b)
end select
if (info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='mld_iluk_fact'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
case default
! If we end up here, something was wrong up in the call chain.
info = psb_err_input_value_invalid_i_
call psb_errpush(psb_err_input_value_invalid_i_,name,&
& i_err=(/3,sv%fact_type,0,0,0/))
goto 9999
end select
else
! Here we should add checks for reuse of L and U.
! For the time being just throw an error.
info = 31
call psb_errpush(info, name, i_err=(/3,0,0,0,0/),a_err=upd)
goto 9999
!
! What is an update of a factorization??
! A first attempt could be to reuse EXACTLY the existing indices
! as if it was an ILU(0) (since, effectively, the sparsity pattern
! should not grow beyond what is already there).
!
call mld_ilu0_fact(sv%fact_type,a,&
& sv%l,sv%u,&
& sv%d,info,blck=b,upd=upd)
end if
call sv%l%set_asb()
call sv%l%trim()
call sv%u%set_asb()
call sv%u%trim()
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),' end'
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine c_ilu_solver_bld
subroutine c_ilu_solver_seti(sv,what,val,info)
use psb_sparse_mod
Implicit None
! Arguments
class(mld_c_ilu_solver_type), intent(inout) :: sv
integer, intent(in) :: what
integer, intent(in) :: val
integer, intent(out) :: info
Integer :: err_act
character(len=20) :: name='c_ilu_solver_seti'
info = psb_success_
call psb_erractionsave(err_act)
select case(what)
case(mld_sub_solve_)
sv%fact_type = val
case(mld_sub_fillin_)
sv%fill_in = val
case default
!!$ write(0,*) name,': Error: invalid WHAT'
!!$ info = -2
end select
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine c_ilu_solver_seti
subroutine c_ilu_solver_setc(sv,what,val,info)
use psb_sparse_mod
Implicit None
! Arguments
class(mld_c_ilu_solver_type), intent(inout) :: sv
integer, intent(in) :: what
character(len=*), intent(in) :: val
integer, intent(out) :: info
Integer :: err_act, ival
character(len=20) :: name='c_ilu_solver_setc'
info = psb_success_
call psb_erractionsave(err_act)
call mld_stringval(val,ival,info)
if (info == psb_success_) call sv%set(what,ival,info)
if (info /= psb_success_) then
info = psb_err_from_subroutine_
call psb_errpush(info, name)
goto 9999
end if
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine c_ilu_solver_setc
subroutine c_ilu_solver_setr(sv,what,val,info)
use psb_sparse_mod
Implicit None
! Arguments
class(mld_c_ilu_solver_type), intent(inout) :: sv
integer, intent(in) :: what
real(psb_spk_), intent(in) :: val
integer, intent(out) :: info
Integer :: err_act
character(len=20) :: name='c_ilu_solver_setr'
call psb_erractionsave(err_act)
info = psb_success_
select case(what)
case(mld_sub_iluthrs_)
sv%thresh = val
case default
!!$ write(0,*) name,': Error: invalid WHAT'
!!$ info = -2
!!$ goto 9999
end select
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine c_ilu_solver_setr
subroutine c_ilu_solver_free(sv,info)
use psb_sparse_mod
Implicit None
! Arguments
class(mld_c_ilu_solver_type), intent(inout) :: sv
integer, intent(out) :: info
Integer :: err_act
character(len=20) :: name='c_ilu_solver_free'
call psb_erractionsave(err_act)
info = psb_success_
if (allocated(sv%d)) then
deallocate(sv%d,stat=info)
if (info /= psb_success_) then
info = psb_err_alloc_dealloc_
call psb_errpush(info,name)
goto 9999
end if
end if
call sv%l%free()
call sv%u%free()
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine c_ilu_solver_free
subroutine c_ilu_solver_descr(sv,info,iout,coarse)
use psb_sparse_mod
Implicit None
! Arguments
class(mld_c_ilu_solver_type), intent(in) :: sv
integer, intent(out) :: info
integer, intent(in), optional :: iout
logical, intent(in), optional :: coarse
! Local variables
integer :: err_act
integer :: ictxt, me, np
character(len=20), parameter :: name='mld_c_ilu_solver_descr'
integer :: iout_
call psb_erractionsave(err_act)
info = psb_success_
if (present(iout)) then
iout_ = iout
else
iout_ = 6
endif
write(iout_,*) ' Incomplete factorization solver: ',&
& fact_names(sv%fact_type)
select case(sv%fact_type)
case(mld_ilu_n_,mld_milu_n_)
write(iout_,*) ' Fill level:',sv%fill_in
case(mld_ilu_t_)
write(iout_,*) ' Fill level:',sv%fill_in
write(iout_,*) ' Fill threshold :',sv%thresh
end select
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine c_ilu_solver_descr
function c_ilu_solver_sizeof(sv) result(val)
use psb_sparse_mod
implicit none
! Arguments
class(mld_c_ilu_solver_type), intent(in) :: sv
integer(psb_long_int_k_) :: val
integer :: i
val = 2*psb_sizeof_int + psb_sizeof_sp
if (allocated(sv%d)) val = val + 2*psb_sizeof_sp * size(sv%d)
val = val + psb_sizeof(sv%l)
val = val + psb_sizeof(sv%u)
return
end function c_ilu_solver_sizeof
subroutine c_ilu_solver_dmp(sv,ictxt,level,info,prefix,head,solver)
use psb_sparse_mod
implicit none
class(mld_c_ilu_solver_type), intent(in) :: sv
integer, intent(in) :: ictxt,level
integer, intent(out) :: info
character(len=*), intent(in), optional :: prefix, head
logical, optional, intent(in) :: solver
integer :: i, j, il1, iln, lname, lev
integer :: icontxt,iam, np
character(len=80) :: prefix_
character(len=120) :: fname ! len should be at least 20 more than
logical :: solver_
! len of prefix_
info = 0
if (present(prefix)) then
prefix_ = trim(prefix(1:min(len(prefix),len(prefix_))))
else
prefix_ = "dump_slv_d"
end if
call psb_info(ictxt,iam,np)
if (present(solver)) then
solver_ = solver
else
solver_ = .false.
end if
lname = len_trim(prefix_)
fname = trim(prefix_)
write(fname(lname+1:lname+5),'(a,i3.3)') '_p',iam
lname = lname + 5
if (solver_) then
write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_lower.mtx'
if (sv%l%is_asb()) &
& call sv%l%print(fname,head=head)
write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_diag.mtx'
if (allocated(sv%d)) &
& call psb_geprt(fname,sv%d,head=head)
write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_upper.mtx'
if (sv%u%is_asb()) &
& call sv%u%print(fname,head=head)
end if
end subroutine c_ilu_solver_dmp
end module mld_c_ilu_solver