You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
269 lines
8.9 KiB
Fortran
269 lines
8.9 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
|
|
!!$
|
|
!!$ 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.
|
|
!!$
|
|
!!$
|
|
! File: mld_dprecaply.f90
|
|
!
|
|
! Subroutine: mld_dprecaply
|
|
! Version: real
|
|
!
|
|
! This routine applies the preconditioner built by mld_dprecbld, i.e. it computes
|
|
!
|
|
! Y = op(M^(-1)) * X,
|
|
! where
|
|
! - M is the preconditioner,
|
|
! - op(M^(-1)) is M^(-1) or its transpose, according to the value of trans,
|
|
! - X and Y are vectors.
|
|
! This operation is performed at each iteration of a preconditioned Krylov solver.
|
|
!
|
|
!
|
|
! Arguments:
|
|
! prec - type(mld_dprec_type), input.
|
|
! The preconditioner data structure containing the local part
|
|
! of the preconditioner to be applied.
|
|
! x - real(psb_dpk_), dimension(:), input.
|
|
! The local part of the vector X in Y=op(M^(-1))*X.
|
|
! y - real(psb_dpk_), dimension(:), output.
|
|
! The local part of the vector Y in Y=op(M^(-1))*X.
|
|
! desc_data - type(psb_desc_type), input.
|
|
! The communication descriptor associated to the matrix to be
|
|
! preconditioned.
|
|
! info - integer, output.
|
|
! Error code.
|
|
! trans - character(len=1), optional.
|
|
! If trans='N','n' then op(M^(-1)) = M^(-1);
|
|
! if trans='T','t' then op(M^(-1)) = M^(-T) (transpose of M^(-1)).
|
|
! work - real(psb_dpk_), dimension (:), optional, target.
|
|
! Workspace. Its size must be at
|
|
! least 4*psb_cd_get_local_cols(desc_data).
|
|
!
|
|
subroutine mld_dprecaply(prec,x,y,desc_data,info,trans,work)
|
|
|
|
use psb_sparse_mod
|
|
use mld_inner_mod, mld_protect_name => mld_dprecaply
|
|
!use mld_prec_mod, mld_protect_name2 => mld_dprecaply
|
|
|
|
implicit none
|
|
|
|
! Arguments
|
|
type(psb_desc_type),intent(in) :: desc_data
|
|
type(mld_dprec_type), intent(in) :: prec
|
|
real(psb_dpk_),intent(in) :: x(:)
|
|
real(psb_dpk_),intent(inout) :: y(:)
|
|
integer, intent(out) :: info
|
|
character(len=1), optional :: trans
|
|
real(psb_dpk_),intent(inout), optional, target :: work(:)
|
|
|
|
! Local variables
|
|
character :: trans_
|
|
real(psb_dpk_), pointer :: work_(:)
|
|
integer :: ictxt,np,me,err_act,iwsz
|
|
character(len=20) :: name
|
|
|
|
name='mld_dprecaply'
|
|
info = psb_success_
|
|
call psb_erractionsave(err_act)
|
|
|
|
ictxt = psb_cd_get_context(desc_data)
|
|
call psb_info(ictxt, me, np)
|
|
|
|
if (present(trans)) then
|
|
trans_=psb_toupper(trans)
|
|
else
|
|
trans_='N'
|
|
end if
|
|
|
|
if (present(work)) then
|
|
work_ => work
|
|
else
|
|
iwsz = max(1,4*psb_cd_get_local_cols(desc_data))
|
|
allocate(work_(iwsz),stat=info)
|
|
if (info /= psb_success_) then
|
|
call psb_errpush(psb_err_alloc_request_,name,i_err=(/iwsz,0,0,0,0/),&
|
|
&a_err='real(psb_dpk_)')
|
|
goto 9999
|
|
end if
|
|
|
|
end if
|
|
|
|
if (.not.(allocated(prec%precv))) then
|
|
!! Error 1: should call mld_dprecbld
|
|
info=3112
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
if (size(prec%precv) >1) then
|
|
!
|
|
! Number of levels > 1: apply the multilevel preconditioner
|
|
!
|
|
call mld_mlprec_aply(done,prec,x,dzero,y,desc_data,trans_,work_,info)
|
|
if(info /= psb_success_) then
|
|
call psb_errpush(psb_err_from_subroutine_,name,a_err='mld_dmlprec_aply')
|
|
goto 9999
|
|
end if
|
|
|
|
else if (size(prec%precv) == 1) then
|
|
!
|
|
! Number of levels = 1: apply the base preconditioner
|
|
!
|
|
!!$ call mld_baseprec_aply(done,prec%precv(1)%prec,x,dzero,y,desc_data,trans_, work_,info)
|
|
call prec%precv(1)%sm%apply(done,x,dzero,y,desc_data,trans_,&
|
|
& prec%precv(1)%iprcparm(mld_smoother_sweeps_), work_,info)
|
|
else
|
|
info = psb_err_from_subroutine_ai_
|
|
call psb_errpush(info,name,a_err='Invalid size of precv',&
|
|
& i_Err=(/size(prec%precv),0,0,0,0/))
|
|
goto 9999
|
|
endif
|
|
|
|
! If the original distribution has an overlap we should fix that.
|
|
call psb_halo(y,desc_data,info,data=psb_comm_mov_)
|
|
|
|
|
|
if (present(work)) then
|
|
else
|
|
deallocate(work_)
|
|
end if
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 continue
|
|
call psb_erractionrestore(err_act)
|
|
if (err_act.eq.psb_act_abort_) then
|
|
call psb_error()
|
|
return
|
|
end if
|
|
return
|
|
|
|
end subroutine mld_dprecaply
|
|
|
|
|
|
!
|
|
! Subroutine: mld_dprecaply1
|
|
! Version: real
|
|
!
|
|
! Applies the preconditioner built by mld_dprecbld, i.e. computes
|
|
!
|
|
! X = op(M^(-1)) * X,
|
|
! where
|
|
! - M is the preconditioner,
|
|
! - op(M^(-1)) is M^(-1) or its transpose, according to the value of trans,
|
|
! - X is a vectors.
|
|
! This operation is performed at each iteration of a preconditioned Krylov solver.
|
|
!
|
|
! This routine differs from mld_dprecaply because the preconditioned vector X
|
|
! overwrites the original one.
|
|
!
|
|
!
|
|
! Arguments:
|
|
! prec - type(mld_dprec_type), input.
|
|
! The preconditioner data structure containing the local part
|
|
! of the preconditioner to be applied.
|
|
! x - real(psb_dpk_), dimension(:), input/output.
|
|
! The local part of vector X in X := op(M^(-1)) * X.
|
|
! desc_data - type(psb_desc_type), input.
|
|
! The communication descriptor associated to the matrix to be
|
|
! preconditioned.
|
|
! info - integer, output.
|
|
! Error code.
|
|
! trans - character(len=1), optional.
|
|
! If trans='N','n' then op(M^(-1)) = M^(-1);
|
|
! if trans='T','t' then op(M^(-1)) = M^(-T) (transpose of M^(-1)).
|
|
!
|
|
subroutine mld_dprecaply1(prec,x,desc_data,info,trans)
|
|
|
|
use psb_sparse_mod
|
|
use mld_inner_mod, mld_protect_name => mld_dprecaply1
|
|
! use mld_prec_mod, mld_protect_name => mld_dprecaply1
|
|
|
|
implicit none
|
|
|
|
! Arguments
|
|
type(psb_desc_type),intent(in) :: desc_data
|
|
type(mld_dprec_type), intent(in) :: prec
|
|
real(psb_dpk_),intent(inout) :: x(:)
|
|
integer, intent(out) :: info
|
|
character(len=1), optional :: trans
|
|
|
|
! Local variables
|
|
integer :: ictxt,np,me, err_act
|
|
real(psb_dpk_), pointer :: WW(:), w1(:)
|
|
character(len=20) :: name
|
|
|
|
name='mld_dprecaply1'
|
|
info = psb_success_
|
|
call psb_erractionsave(err_act)
|
|
|
|
|
|
ictxt = psb_cd_get_context(desc_data)
|
|
call psb_info(ictxt, me, np)
|
|
|
|
allocate(ww(size(x)),w1(size(x)),stat=info)
|
|
if (info /= psb_success_) then
|
|
info=psb_err_alloc_request_
|
|
call psb_errpush(info,name,i_err=(/2*size(x),0,0,0,0/),&
|
|
& a_err='real(psb_dpk_)')
|
|
goto 9999
|
|
end if
|
|
|
|
call mld_precaply(prec,x,ww,desc_data,info,trans=trans,work=w1)
|
|
if (info /= psb_success_) then
|
|
call psb_errpush(psb_err_from_subroutine_,name,a_err='mld_precaply')
|
|
goto 9999
|
|
end if
|
|
|
|
x(:) = ww(:)
|
|
deallocate(ww,W1,stat=info)
|
|
if (info /= psb_success_) then
|
|
info = psb_err_alloc_dealloc_
|
|
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.eq.psb_act_abort_) then
|
|
call psb_error()
|
|
return
|
|
end if
|
|
return
|
|
end subroutine mld_dprecaply1
|