!!$
!!$
!!$ MLD2P4 version 1.1
!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
!!$ based on PSBLAS (Parallel Sparse BLAS version 2.3.1)
!!$
!!$ (C) Copyright 2008,2009
!!$
!!$ 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_cprecinit.f90
!
! Subroutine: mld_cprecinit
! Version: complex
!
! 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:
!
! '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 2 levels and post-smoothing only. RAS with
! overlap 1 and 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 LU from SuperLU on the blocks, are applied at
! the coarsest level, on the distributed coarse matrix.
! The smoothed aggregation algorithm with threshold 0
! is used to build the 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_cprec_type), input/output.
! The preconditioner data structure.
! ptype - character(len=*), input.
! The type of preconditioner. Its values are '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_cprecinit(p,ptype,info,nlev)
use psb_base_mod
use mld_prec_mod, psb_protect_name => mld_cprecinit
implicit none
! Arguments
type(mld_cprec_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%precv)) then
call mld_precfree(p,info)
if (info /=0) then
! Do we want to do something?
endif
endif
select case(psb_toupper(ptype(1:len_trim(ptype))))
case ('NOPREC')
nlev_ = 1
ilev_ = 1
allocate(p%precv(nlev_),stat=info)
if (info == 0) call psb_realloc(mld_ifpsz_,p%precv(ilev_)%iprcparm,info)
if (info == 0) call psb_realloc(mld_rfpsz_,p%precv(ilev_)%rprcparm,info)
if (info == 0) call psb_realloc(mld_ifpsz_,p%precv(ilev_)%prec%iprcparm,info)
if (info == 0) call psb_realloc(mld_rfpsz_,p%precv(ilev_)%prec%rprcparm,info)
if (info /= 0) return
p%precv(ilev_)%iprcparm(:) = 0
p%precv(ilev_)%rprcparm(:) = szero
p%precv(ilev_)%prec%iprcparm(:) = 0
p%precv(ilev_)%prec%rprcparm(:) = szero
p%precv(ilev_)%prec%iprcparm(mld_smoother_type_) = mld_noprec_
p%precv(ilev_)%prec%iprcparm(mld_sub_solve_) = mld_f_none_
p%precv(ilev_)%prec%iprcparm(mld_sub_restr_) = psb_none_
p%precv(ilev_)%prec%iprcparm(mld_sub_prol_) = psb_none_
p%precv(ilev_)%prec%iprcparm(mld_sub_ren_) = 0
p%precv(ilev_)%prec%iprcparm(mld_sub_ovr_) = 0
p%precv(ilev_)%prec%iprcparm(mld_smoother_sweeps_) = 1
case ('DIAG')
nlev_ = 1
ilev_ = 1
allocate(p%precv(nlev_),stat=info)
if (info == 0) call psb_realloc(mld_ifpsz_,p%precv(ilev_)%iprcparm,info)
if (info == 0) call psb_realloc(mld_rfpsz_,p%precv(ilev_)%rprcparm,info)
if (info == 0) call psb_realloc(mld_ifpsz_,p%precv(ilev_)%prec%iprcparm,info)
if (info == 0) call psb_realloc(mld_rfpsz_,p%precv(ilev_)%prec%rprcparm,info)
if (info /= 0) return
p%precv(ilev_)%iprcparm(:) = 0
p%precv(ilev_)%rprcparm(:) = szero
p%precv(ilev_)%prec%iprcparm(:) = 0
p%precv(ilev_)%prec%rprcparm(:) = szero
p%precv(ilev_)%prec%iprcparm(mld_smoother_type_) = mld_diag_
p%precv(ilev_)%prec%iprcparm(mld_sub_solve_) = mld_f_none_
p%precv(ilev_)%prec%iprcparm(mld_sub_restr_) = psb_none_
p%precv(ilev_)%prec%iprcparm(mld_sub_prol_) = psb_none_
p%precv(ilev_)%prec%iprcparm(mld_sub_ren_) = 0
p%precv(ilev_)%prec%iprcparm(mld_sub_ovr_) = 0
p%precv(ilev_)%prec%iprcparm(mld_smoother_sweeps_) = 1
case ('BJAC')
nlev_ = 1
ilev_ = 1
allocate(p%precv(nlev_),stat=info)
if (info == 0) call psb_realloc(mld_ifpsz_,p%precv(ilev_)%iprcparm,info)
if (info == 0) call psb_realloc(mld_rfpsz_,p%precv(ilev_)%rprcparm,info)
if (info == 0) call psb_realloc(mld_ifpsz_,p%precv(ilev_)%prec%iprcparm,info)
if (info == 0) call psb_realloc(mld_rfpsz_,p%precv(ilev_)%prec%rprcparm,info)
if (info /= 0) return
p%precv(ilev_)%iprcparm(:) = 0
p%precv(ilev_)%rprcparm(:) = szero
p%precv(ilev_)%prec%iprcparm(:) = 0
p%precv(ilev_)%prec%rprcparm(:) = szero
p%precv(ilev_)%prec%iprcparm(mld_smoother_type_) = mld_bjac_
p%precv(ilev_)%prec%iprcparm(mld_sub_solve_) = mld_ilu_n_
p%precv(ilev_)%prec%iprcparm(mld_sub_restr_) = psb_none_
p%precv(ilev_)%prec%iprcparm(mld_sub_prol_) = psb_none_
p%precv(ilev_)%prec%iprcparm(mld_sub_ren_) = 0
p%precv(ilev_)%prec%iprcparm(mld_sub_ovr_) = 0
p%precv(ilev_)%prec%iprcparm(mld_sub_fillin_) = 0
p%precv(ilev_)%prec%iprcparm(mld_smoother_sweeps_) = 1
case ('AS')
nlev_ = 1
ilev_ = 1
allocate(p%precv(nlev_),stat=info)
if (info == 0) call psb_realloc(mld_ifpsz_,p%precv(ilev_)%iprcparm,info)
if (info == 0) call psb_realloc(mld_rfpsz_,p%precv(ilev_)%rprcparm,info)
if (info == 0) call psb_realloc(mld_ifpsz_,p%precv(ilev_)%prec%iprcparm,info)
if (info == 0) call psb_realloc(mld_rfpsz_,p%precv(ilev_)%prec%rprcparm,info)
if (info /= 0) return
p%precv(ilev_)%iprcparm(:) = 0
p%precv(ilev_)%rprcparm(:) = szero
p%precv(ilev_)%prec%iprcparm(:) = 0
p%precv(ilev_)%prec%rprcparm(:) = szero
p%precv(ilev_)%prec%iprcparm(mld_smoother_type_) = mld_as_
p%precv(ilev_)%prec%iprcparm(mld_sub_solve_) = mld_ilu_n_
p%precv(ilev_)%prec%iprcparm(mld_sub_restr_) = psb_halo_
p%precv(ilev_)%prec%iprcparm(mld_sub_prol_) = psb_none_
p%precv(ilev_)%prec%iprcparm(mld_sub_ren_) = 0
p%precv(ilev_)%prec%iprcparm(mld_sub_ovr_) = 1
p%precv(ilev_)%prec%iprcparm(mld_sub_fillin_) = 0
p%precv(ilev_)%prec%iprcparm(mld_smoother_sweeps_) = 1
case ('ML')
if (present(nlev)) then
nlev_ = max(1,nlev)
else
nlev_ = 2
end if
ilev_ = 1
allocate(p%precv(nlev_),stat=info)
if (info == 0) call psb_realloc(mld_ifpsz_,p%precv(ilev_)%iprcparm,info)
if (info == 0) call psb_realloc(mld_rfpsz_,p%precv(ilev_)%rprcparm,info)
if (info == 0) call psb_realloc(mld_ifpsz_,p%precv(ilev_)%prec%iprcparm,info)
if (info == 0) call psb_realloc(mld_rfpsz_,p%precv(ilev_)%prec%rprcparm,info)
if (info /= 0) return
p%precv(ilev_)%iprcparm(:) = 0
p%precv(ilev_)%rprcparm(:) = szero
p%precv(ilev_)%prec%iprcparm(:) = 0
p%precv(ilev_)%prec%rprcparm(:) = szero
p%precv(ilev_)%prec%iprcparm(mld_smoother_type_) = mld_as_
p%precv(ilev_)%prec%iprcparm(mld_sub_solve_) = mld_ilu_n_
p%precv(ilev_)%prec%iprcparm(mld_sub_restr_) = psb_halo_
p%precv(ilev_)%prec%iprcparm(mld_sub_prol_) = psb_none_
p%precv(ilev_)%prec%iprcparm(mld_sub_ren_) = 0
p%precv(ilev_)%prec%iprcparm(mld_sub_ovr_) = 1
p%precv(ilev_)%prec%iprcparm(mld_sub_fillin_) = 0
p%precv(ilev_)%prec%iprcparm(mld_smoother_sweeps_) = 1
if (nlev_ == 1) return
do ilev_ = 2, nlev_ -1
if (info == 0) call psb_realloc(mld_ifpsz_,p%precv(ilev_)%iprcparm,info)
if (info == 0) call psb_realloc(mld_rfpsz_,p%precv(ilev_)%rprcparm,info)
if (info == 0) call psb_realloc(mld_ifpsz_,p%precv(ilev_)%prec%iprcparm,info)
if (info == 0) call psb_realloc(mld_rfpsz_,p%precv(ilev_)%prec%rprcparm,info)
if (info /= 0) return
p%precv(ilev_)%iprcparm(:) = 0
p%precv(ilev_)%rprcparm(:) = szero
p%precv(ilev_)%prec%iprcparm(:) = 0
p%precv(ilev_)%prec%rprcparm(:) = szero
p%precv(ilev_)%prec%iprcparm(mld_smoother_type_) = mld_as_
p%precv(ilev_)%prec%iprcparm(mld_sub_restr_) = psb_halo_
p%precv(ilev_)%prec%iprcparm(mld_sub_prol_) = psb_none_
p%precv(ilev_)%prec%iprcparm(mld_sub_ren_) = 0
p%precv(ilev_)%prec%iprcparm(mld_sub_ovr_) = 1
p%precv(ilev_)%prec%iprcparm(mld_sub_solve_) = mld_ilu_n_
p%precv(ilev_)%prec%iprcparm(mld_sub_fillin_) = 0
p%precv(ilev_)%prec%iprcparm(mld_smoother_sweeps_) = 1
p%precv(ilev_)%iprcparm(mld_ml_type_) = mld_mult_ml_
p%precv(ilev_)%iprcparm(mld_aggr_alg_) = mld_dec_aggr_
p%precv(ilev_)%iprcparm(mld_aggr_kind_) = mld_smooth_prol_
p%precv(ilev_)%iprcparm(mld_coarse_mat_) = mld_distr_mat_
p%precv(ilev_)%iprcparm(mld_smoother_pos_) = mld_post_smooth_
p%precv(ilev_)%iprcparm(mld_aggr_omega_alg_) = mld_eig_est_
p%precv(ilev_)%iprcparm(mld_aggr_eig_) = mld_max_norm_
p%precv(ilev_)%iprcparm(mld_aggr_filter_) = mld_no_filter_mat_
p%precv(ilev_)%rprcparm(mld_aggr_omega_val_) = szero
p%precv(ilev_)%rprcparm(mld_aggr_thresh_) = szero
end do
ilev_ = nlev_
if (info == 0) call psb_realloc(mld_ifpsz_,p%precv(ilev_)%iprcparm,info)
if (info == 0) call psb_realloc(mld_rfpsz_,p%precv(ilev_)%rprcparm,info)
if (info == 0) call psb_realloc(mld_ifpsz_,p%precv(ilev_)%prec%iprcparm,info)
if (info == 0) call psb_realloc(mld_rfpsz_,p%precv(ilev_)%prec%rprcparm,info)
if (info /= 0) return
p%precv(ilev_)%iprcparm(:) = 0
p%precv(ilev_)%rprcparm(:) = szero
p%precv(ilev_)%prec%iprcparm(:) = 0
p%precv(ilev_)%prec%rprcparm(:) = szero
p%precv(ilev_)%prec%iprcparm(mld_coarse_solve_) = mld_bjac_
#if defined(HAVE_SLU_)
p%precv(ilev_)%prec%iprcparm(mld_sub_solve_) = mld_slu_
#else
p%precv(ilev_)%prec%iprcparm(mld_sub_solve_) = mld_ilu_n_
#endif
p%precv(ilev_)%prec%iprcparm(mld_smoother_type_) = mld_bjac_
p%precv(ilev_)%prec%iprcparm(mld_coarse_mat_) = mld_distr_mat_
p%precv(ilev_)%prec%iprcparm(mld_sub_restr_) = psb_none_
p%precv(ilev_)%prec%iprcparm(mld_sub_prol_) = psb_none_
p%precv(ilev_)%prec%iprcparm(mld_sub_ren_) = 0
p%precv(ilev_)%prec%iprcparm(mld_sub_ovr_) = 0
p%precv(ilev_)%prec%iprcparm(mld_sub_fillin_) = 0
p%precv(ilev_)%prec%iprcparm(mld_smoother_sweeps_) = 4
p%precv(ilev_)%iprcparm(mld_ml_type_) = mld_mult_ml_
p%precv(ilev_)%iprcparm(mld_aggr_alg_) = mld_dec_aggr_
p%precv(ilev_)%iprcparm(mld_aggr_kind_) = mld_smooth_prol_
p%precv(ilev_)%iprcparm(mld_smoother_pos_) = mld_post_smooth_
p%precv(ilev_)%iprcparm(mld_aggr_omega_alg_) = mld_eig_est_
p%precv(ilev_)%iprcparm(mld_aggr_eig_) = mld_max_norm_
p%precv(ilev_)%iprcparm(mld_aggr_filter_) = mld_no_filter_mat_
p%precv(ilev_)%rprcparm(mld_aggr_omega_val_) = szero
p%precv(ilev_)%rprcparm(mld_aggr_thresh_) = szero
case default
write(0,*) name,': Warning: Unknown preconditioner type request "',ptype,'"'
info = 2
end select
end subroutine mld_cprecinit