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.
253 lines
11 KiB
Fortran
253 lines
11 KiB
Fortran
!!$
|
|
!!$
|
|
!!$ MLD2P4 version 1.0
|
|
!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
|
|
!!$ based on PSBLAS (Parallel Sparse BLAS version 2.2)
|
|
!!$
|
|
!!$ (C) Copyright 2008
|
|
!!$
|
|
!!$ Salvatore Filippone University of Rome Tor Vergata
|
|
!!$ Alfredo Buttari University of Rome Tor Vergata
|
|
!!$ 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_dprecinit.f90
|
|
!
|
|
! Subroutine: mld_dprecinit
|
|
! Version: real
|
|
!
|
|
! This routine allocates and initializes the preconditioner data structure,
|
|
! according to the preconditioner type chosen by the user.
|
|
!
|
|
! A default preconditioner is set for each preconditioner type
|
|
! specified by the user:
|
|
!
|
|
! 'NONE', 'NOPREC' - no preconditioner
|
|
!
|
|
! 'DIAG' - diagonal preconditioner
|
|
!
|
|
! 'BJAC' - block Jacobi preconditioner, with ILU(0)
|
|
! on the local blocks
|
|
!
|
|
! 'AS' - Restricted Additive Schwarz (RAS), with
|
|
! overlap 1 and ILU(0) on the local submatrices
|
|
!
|
|
! 'ML' - Multilevel hybrid preconditioner (additive on the
|
|
! same level and multiplicative through the levels),
|
|
! with nlev levels and post-smoothing only. The block
|
|
! Jacobi preconditioner, with ILU(0) on the local
|
|
! blocks, is applied as post-smoother at each level
|
|
! but the coarsest one; four sweeps of the block-Jacobi
|
|
! solver, with ILU(0) on the blocks, are applied at
|
|
! the coarsest level, on the distributed coarse matrix.
|
|
!
|
|
! For the multilevel preconditioners, the levels are numbered in increasing
|
|
! order starting from the finest one, i.e. level 1 is the finest level.
|
|
!
|
|
!
|
|
! Arguments:
|
|
! p - type(mld_dprec_type), input/output.
|
|
! The preconditioner data structure.
|
|
! ptype - character(len=*), input.
|
|
! The type of preconditioner. Its values are 'NONE',
|
|
! 'NOPREC', 'DIAG', 'BJAC', 'AS', 'ML' (and the corresponding
|
|
! lowercase strings).
|
|
! info - integer, output.
|
|
! Error code.
|
|
! nlev - integer, optional, input.
|
|
! The number of levels of the multilevel preconditioner.
|
|
! If nlev is not present and ptype='ML', then nlev=2
|
|
! is assumed. If ptype/='ML', nlev is ignored.
|
|
!
|
|
subroutine mld_dprecinit(p,ptype,info,nlev)
|
|
|
|
use psb_base_mod
|
|
use mld_prec_mod, mld_protect_name => mld_dprecinit
|
|
|
|
implicit none
|
|
|
|
! Arguments
|
|
type(mld_dprec_type), intent(inout) :: p
|
|
character(len=*), intent(in) :: ptype
|
|
integer, intent(out) :: info
|
|
integer, optional, intent(in) :: nlev
|
|
|
|
! Local variables
|
|
integer :: nlev_, ilev_
|
|
character(len=*), parameter :: name='mld_precinit'
|
|
info = 0
|
|
|
|
if (allocated(p%baseprecv)) then
|
|
call mld_precfree(p,info)
|
|
if (info /=0) then
|
|
! Do we want to do something?
|
|
endif
|
|
endif
|
|
|
|
select case(toupper(ptype(1:len_trim(ptype))))
|
|
case ('NONE','NOPREC')
|
|
nlev_ = 1
|
|
ilev_ = 1
|
|
allocate(p%baseprecv(nlev_),stat=info)
|
|
if (info == 0) call psb_realloc(mld_ifpsz_,p%baseprecv(ilev_)%iprcparm,info)
|
|
if (info == 0) call psb_realloc(mld_dfpsz_,p%baseprecv(ilev_)%dprcparm,info)
|
|
if (info /= 0) return
|
|
p%baseprecv(ilev_)%iprcparm(:) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_prec_type_) = mld_noprec_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_solve_) = mld_f_none_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_restr_) = psb_none_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_prol_) = psb_none_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_ren_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_n_ovr_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_smooth_sweeps_) = 1
|
|
|
|
case ('DIAG')
|
|
nlev_ = 1
|
|
ilev_ = 1
|
|
allocate(p%baseprecv(nlev_),stat=info)
|
|
if (info == 0) call psb_realloc(mld_ifpsz_,p%baseprecv(ilev_)%iprcparm,info)
|
|
if (info == 0) call psb_realloc(mld_dfpsz_,p%baseprecv(ilev_)%dprcparm,info)
|
|
if (info /= 0) return
|
|
p%baseprecv(ilev_)%iprcparm(:) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_prec_type_) = mld_diag_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_solve_) = mld_f_none_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_restr_) = psb_none_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_prol_) = psb_none_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_ren_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_n_ovr_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_smooth_sweeps_) = 1
|
|
|
|
case ('BJAC')
|
|
nlev_ = 1
|
|
ilev_ = 1
|
|
allocate(p%baseprecv(nlev_),stat=info)
|
|
if (info == 0) call psb_realloc(mld_ifpsz_,p%baseprecv(ilev_)%iprcparm,info)
|
|
if (info == 0) call psb_realloc(mld_dfpsz_,p%baseprecv(ilev_)%dprcparm,info)
|
|
if (info /= 0) return
|
|
p%baseprecv(ilev_)%iprcparm(:) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_prec_type_) = mld_bjac_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_solve_) = mld_ilu_n_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_restr_) = psb_none_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_prol_) = psb_none_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_ren_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_n_ovr_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_fill_in_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_smooth_sweeps_) = 1
|
|
|
|
case ('AS')
|
|
nlev_ = 1
|
|
ilev_ = 1
|
|
allocate(p%baseprecv(nlev_),stat=info)
|
|
if (info == 0) call psb_realloc(mld_ifpsz_,p%baseprecv(ilev_)%iprcparm,info)
|
|
if (info == 0) call psb_realloc(mld_dfpsz_,p%baseprecv(ilev_)%dprcparm,info)
|
|
if (info /= 0) return
|
|
p%baseprecv(ilev_)%iprcparm(:) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_prec_type_) = mld_as_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_solve_) = mld_ilu_n_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_restr_) = psb_halo_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_prol_) = psb_none_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_ren_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_n_ovr_) = 1
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_fill_in_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_smooth_sweeps_) = 1
|
|
|
|
|
|
case ('ML')
|
|
|
|
if (present(nlev)) then
|
|
nlev_ = max(1,nlev)
|
|
else
|
|
nlev_ = 2
|
|
end if
|
|
ilev_ = 1
|
|
allocate(p%baseprecv(nlev_),stat=info)
|
|
if (info == 0) call psb_realloc(mld_ifpsz_,p%baseprecv(ilev_)%iprcparm,info)
|
|
if (info == 0) call psb_realloc(mld_dfpsz_,p%baseprecv(ilev_)%dprcparm,info)
|
|
if (info /= 0) return
|
|
p%baseprecv(ilev_)%iprcparm(:) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_prec_type_) = mld_as_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_solve_) = mld_ilu_n_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_restr_) = psb_halo_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_prol_) = psb_none_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_ren_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_n_ovr_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_fill_in_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_smooth_sweeps_) = 1
|
|
if (nlev_ == 1) return
|
|
|
|
do ilev_ = 2, nlev_ -1
|
|
if (info == 0) call psb_realloc(mld_ifpsz_,p%baseprecv(ilev_)%iprcparm,info)
|
|
if (info == 0) call psb_realloc(mld_dfpsz_,p%baseprecv(ilev_)%dprcparm,info)
|
|
if (info /= 0) return
|
|
p%baseprecv(ilev_)%iprcparm(:) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_prec_type_) = mld_bjac_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_restr_) = psb_none_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_prol_) = psb_none_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_ren_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_n_ovr_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_ml_type_) = mld_mult_ml_
|
|
p%baseprecv(ilev_)%iprcparm(mld_aggr_alg_) = mld_dec_aggr_
|
|
p%baseprecv(ilev_)%iprcparm(mld_aggr_kind_) = mld_smooth_prol_
|
|
p%baseprecv(ilev_)%iprcparm(mld_coarse_mat_) = mld_distr_mat_
|
|
p%baseprecv(ilev_)%iprcparm(mld_smooth_pos_) = mld_post_smooth_
|
|
p%baseprecv(ilev_)%iprcparm(mld_aggr_eig_) = mld_max_norm_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_solve_) = mld_ilu_n_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_fill_in_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_smooth_sweeps_) = 1
|
|
p%baseprecv(ilev_)%dprcparm(mld_aggr_damp_) = 4.d0/3.d0
|
|
end do
|
|
ilev_ = nlev_
|
|
if (info == 0) call psb_realloc(mld_ifpsz_,p%baseprecv(ilev_)%iprcparm,info)
|
|
if (info == 0) call psb_realloc(mld_dfpsz_,p%baseprecv(ilev_)%dprcparm,info)
|
|
if (info /= 0) return
|
|
p%baseprecv(ilev_)%iprcparm(:) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_prec_type_) = mld_bjac_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_restr_) = psb_none_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_prol_) = psb_none_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_ren_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_n_ovr_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_ml_type_) = mld_mult_ml_
|
|
p%baseprecv(ilev_)%iprcparm(mld_aggr_alg_) = mld_dec_aggr_
|
|
p%baseprecv(ilev_)%iprcparm(mld_aggr_kind_) = mld_smooth_prol_
|
|
p%baseprecv(ilev_)%iprcparm(mld_coarse_mat_) = mld_distr_mat_
|
|
p%baseprecv(ilev_)%iprcparm(mld_smooth_pos_) = mld_post_smooth_
|
|
p%baseprecv(ilev_)%iprcparm(mld_aggr_eig_) = mld_max_norm_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_solve_) = mld_ilu_n_
|
|
p%baseprecv(ilev_)%iprcparm(mld_sub_fill_in_) = 0
|
|
p%baseprecv(ilev_)%iprcparm(mld_smooth_sweeps_) = 4
|
|
p%baseprecv(ilev_)%dprcparm(mld_aggr_damp_) = 4.d0/3.d0
|
|
|
|
case default
|
|
write(0,*) name,': Warning: Unknown preconditioner type request "',ptype,'"'
|
|
info = 2
|
|
|
|
end select
|
|
|
|
|
|
end subroutine mld_dprecinit
|