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788 lines
26 KiB
Fortran
788 lines
26 KiB
Fortran
!!$
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!!$
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!!$ MLD2P4 version 2.0
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!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
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!!$ based on PSBLAS (Parallel Sparse BLAS version 3.3)
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!!$
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!!$ (C) Copyright 2008, 2010, 2012, 2015
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!!$
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!!$ Salvatore Filippone University of Rome Tor Vergata
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!!$ Alfredo Buttari CNRS-IRIT, Toulouse
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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_sprecset.f90
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!
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! Subroutine: mld_sprecseti
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! Version: real
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!
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! This routine sets the integer parameters defining the preconditioner. More
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! precisely, the integer parameter identified by 'what' is assigned the value
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! contained in 'val'.
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! For the multilevel preconditioners, the levels are numbered in increasing
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! order starting from the finest one, i.e. level 1 is the finest level.
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!
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! To set character and real parameters, see mld_sprecsetc and mld_sprecsetr,
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! respectively.
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!
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!
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! Arguments:
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! p - type(mld_sprec_type), input/output.
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! The preconditioner data structure.
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! what - integer, input.
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! The number identifying the parameter to be set.
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! A mnemonic constant has been associated to each of these
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! numbers, as reported in the MLD2P4 User's and Reference Guide.
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! val - integer, input.
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! The value of the parameter to be set. The list of allowed
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! values is reported in the MLD2P4 User's and Reference Guide.
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! info - integer, output.
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! Error code.
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! ilev - integer, optional, input.
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! For the multilevel preconditioner, the level at which the
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! preconditioner parameter has to be set.
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! If nlev is not present, the parameter identified by 'what'
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! is set at all the appropriate levels.
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!
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! NOTE: currently, the use of the argument ilev is not "safe" and is reserved to
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! MLD2P4 developers. Indeed, by using ilev it is possible to set different values
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! of the same parameter at different levels 1,...,nlev-1, even in cases where
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! the parameter must have the same value at all the levels but the coarsest one.
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! For this reason, the interface mld_precset to this routine has been built in
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! such a way that ilev is not visible to the user (see mld_prec_mod.f90).
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!
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subroutine mld_scprecseti(p,what,val,info,ilev)
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use psb_base_mod
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use mld_s_prec_mod, mld_protect_name => mld_scprecseti
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use mld_s_jac_smoother
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use mld_s_as_smoother
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use mld_s_diag_solver
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use mld_s_ilu_solver
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use mld_s_id_solver
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use mld_s_gs_solver
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#if defined(HAVE_SLU_)
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use mld_s_slu_solver
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#endif
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implicit none
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! Arguments
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class(mld_sprec_type), intent(inout) :: p
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character(len=*), intent(in) :: what
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integer(psb_ipk_), intent(in) :: val
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_), optional, intent(in) :: ilev
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! Local variables
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integer(psb_ipk_) :: ilev_, nlev_
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character(len=*), parameter :: name='mld_precseti'
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info = psb_success_
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if (.not.allocated(p%precv)) then
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info = 3111
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write(psb_err_unit,*) name,&
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& ': Error: uninitialized preconditioner,',&
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&' should call MLD_PRECINIT'
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return
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endif
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nlev_ = size(p%precv)
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if (present(ilev)) then
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ilev_ = ilev
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else
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ilev_ = 1
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end if
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if ((ilev_<1).or.(ilev_ > nlev_)) then
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info = -1
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write(psb_err_unit,*) name,&
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&': Error: invalid ILEV/NLEV combination',ilev_, nlev_
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return
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endif
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if (psb_toupper(what) == 'COARSE_AGGR_SIZE') then
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p%coarse_aggr_size = max(val,-1)
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return
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end if
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!
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! Set preconditioner parameters at level ilev.
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!
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if (present(ilev)) then
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if (ilev_ == 1) then
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!
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! Rules for fine level are slightly different.
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!
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select case(psb_toupper(trim(what)))
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case('SMOOTHER_TYPE')
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call onelev_set_smoother(p%precv(ilev_),val,info)
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case('SUB_SOLVE')
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call onelev_set_solver(p%precv(ilev_),val,info)
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case('SMOOTHER_SWEEPS','ML_TYPE','AGGR_ALG','AGGR_KIND',&
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& 'SMOOTHER_POS','AGGR_OMEGA_ALG','AGGR_EIG',&
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& 'SMOOTHER_SWEEPS_PRE','SMOOTHER_SWEEPS_POST',&
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& 'SUB_RESTR','SUB_PROL', &
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& 'SUB_REN','SUB_OVR','SUB_FILLIN')
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call p%precv(ilev_)%set(what,val,info)
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case default
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call p%precv(ilev_)%set(what,val,info)
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end select
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else if (ilev_ > 1) then
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select case(psb_toupper(what))
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case('SMOOTHER_TYPE')
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call onelev_set_smoother(p%precv(ilev_),val,info)
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case('SUB_SOLVE')
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call onelev_set_solver(p%precv(ilev_),val,info)
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case('SMOOTHER_SWEEPS','ML_TYPE','AGGR_ALG','AGGR_KIND',&
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& 'SMOOTHER_POS','AGGR_OMEGA_ALG','AGGR_EIG',&
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& 'SMOOTHER_SWEEPS_PRE','SMOOTHER_SWEEPS_POST',&
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& 'SUB_RESTR','SUB_PROL', &
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& 'SUB_REN','SUB_OVR','SUB_FILLIN',&
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& 'COARSE_MAT')
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call p%precv(ilev_)%set(what,val,info)
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case('COARSE_SUBSOLVE')
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if (ilev_ /= nlev_) then
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write(psb_err_unit,*) name,&
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& ': Error: Inconsistent specification of WHAT vs. ILEV'
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info = -2
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return
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end if
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call onelev_set_solver(p%precv(ilev_),val,info)
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case('COARSE_SOLVE')
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if (ilev_ /= nlev_) then
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write(psb_err_unit,*) name,&
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& ': Error: Inconsistent specification of WHAT vs. ILEV'
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info = -2
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return
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end if
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if (nlev_ > 1) then
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call p%precv(nlev_)%set('COARSE_SOLVE',val,info)
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select case (val)
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case(mld_bjac_)
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call onelev_set_smoother(p%precv(nlev_),val,info)
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#if defined(HAVE_SLU_)
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call onelev_set_solver(p%precv(nlev_),mld_slu_,info)
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#else
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call onelev_set_solver(p%precv(nlev_),mld_ilu_n_,info)
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#endif
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call p%precv(nlev_)%set('COARSE_MAT',mld_distr_mat_,info)
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case(mld_umf_, mld_slu_,mld_ilu_n_, mld_ilu_t_,mld_milu_n_)
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call onelev_set_smoother(p%precv(nlev_),mld_bjac_,info)
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call onelev_set_solver(p%precv(nlev_),val,info)
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call p%precv(nlev_)%set('COARSE_MAT',mld_repl_mat_,info)
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case(mld_sludist_)
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call onelev_set_smoother(p%precv(nlev_),mld_bjac_,info)
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call onelev_set_solver(p%precv(nlev_),val,info)
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call p%precv(nlev_)%set('COARSE_MAT',mld_distr_mat_,info)
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case(mld_jac_)
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call onelev_set_smoother(p%precv(nlev_),mld_bjac_,info)
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call onelev_set_solver(p%precv(nlev_),mld_diag_scale_,info)
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call p%precv(nlev_)%set('COARSE_MAT',mld_distr_mat_,info)
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end select
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endif
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case('COARSE_SWEEPS')
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if (ilev_ /= nlev_) then
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write(psb_err_unit,*) name,&
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& ': Error: Inconsistent specification of WHAT vs. ILEV'
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info = -2
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return
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end if
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call p%precv(nlev_)%set('SMOOTHER_SWEEPS',val,info)
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case('COARSE_FILLIN')
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if (ilev_ /= nlev_) then
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write(psb_err_unit,*) name,&
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& ': Error: Inconsistent specification of WHAT vs. ILEV'
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info = -2
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return
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end if
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call p%precv(nlev_)%set('SUB_FILLIN',val,info)
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case default
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call p%precv(ilev_)%set(what,val,info)
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end select
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endif
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else if (.not.present(ilev)) then
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!
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! ilev not specified: set preconditioner parameters at all the appropriate
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! levels
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!
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select case(psb_toupper(trim(what)))
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case('SUB_SOLVE')
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do ilev_=1,max(1,nlev_-1)
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if (.not.allocated(p%precv(ilev_)%sm)) then
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write(psb_err_unit,*) name,&
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& ': Error: uninitialized preconditioner component,',&
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& ' should call MLD_PRECINIT'
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info = -1
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return
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endif
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call onelev_set_solver(p%precv(ilev_),val,info)
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end do
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case('SUB_RESTR','SUB_PROL',&
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& 'SUB_REN','SUB_OVR','SUB_FILLIN')
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do ilev_=1,max(1,nlev_-1)
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call p%precv(ilev_)%set(what,val,info)
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end do
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case('SMOOTHER_SWEEPS')
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do ilev_=1,max(1,nlev_-1)
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call p%precv(ilev_)%set(what,val,info)
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end do
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case('SMOOTHER_TYPE')
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do ilev_=1,max(1,nlev_-1)
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call onelev_set_smoother(p%precv(ilev_),val,info)
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end do
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case('ML_TYPE','AGGR_ALG','AGGR_KIND',&
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& 'SMOOTHER_SWEEPS_PRE','SMOOTHER_SWEEPS_POST',&
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& 'SMOOTHER_POS','AGGR_OMEGA_ALG',&
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& 'AGGR_EIG','AGGR_FILTER')
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do ilev_=1,nlev_
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call p%precv(ilev_)%set(what,val,info)
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end do
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case('COARSE_MAT')
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if (nlev_ > 1) then
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call p%precv(nlev_)%set('COARSE_MAT',val,info)
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end if
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case('COARSE_SOLVE')
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if (nlev_ > 1) then
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call p%precv(nlev_)%set('COARSE_SOLVE',val,info)
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select case (val)
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case(mld_bjac_)
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call onelev_set_smoother(p%precv(nlev_),mld_bjac_,info)
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#if defined(HAVE_SLU_)
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call onelev_set_solver(p%precv(nlev_),mld_slu_,info)
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#else
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call onelev_set_solver(p%precv(nlev_),mld_ilu_n_,info)
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#endif
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call p%precv(nlev_)%set('COARSE_MAT',mld_distr_mat_,info)
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case(mld_umf_, mld_slu_,mld_ilu_n_, mld_ilu_t_,mld_milu_n_)
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call onelev_set_smoother(p%precv(nlev_),mld_bjac_,info)
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call onelev_set_solver(p%precv(nlev_),val,info)
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call p%precv(nlev_)%set('COARSE_MAT',mld_repl_mat_,info)
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case(mld_sludist_)
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call onelev_set_smoother(p%precv(nlev_),mld_bjac_,info)
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call onelev_set_solver(p%precv(nlev_),val,info)
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call p%precv(nlev_)%set('COARSE_MAT',mld_distr_mat_,info)
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case(mld_jac_)
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call onelev_set_smoother(p%precv(nlev_),mld_bjac_,info)
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call onelev_set_solver(p%precv(nlev_),mld_diag_scale_,info)
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call p%precv(nlev_)%set('COARSE_MAT',mld_distr_mat_,info)
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end select
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endif
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case('COARSE_SUBSOLVE')
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if (nlev_ > 1) then
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call onelev_set_solver(p%precv(nlev_),val,info)
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endif
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case('COARSE_SWEEPS')
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if (nlev_ > 1) then
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call p%precv(nlev_)%set('SMOOTHER_SWEEPS',val,info)
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end if
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case('COARSE_FILLIN')
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if (nlev_ > 1) then
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call p%precv(nlev_)%set('SUB_FILLIN',val,info)
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end if
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case default
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do ilev_=1,nlev_
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call p%precv(ilev_)%set(what,val,info)
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end do
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end select
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endif
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contains
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subroutine onelev_set_smoother(level,val,info)
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type(mld_s_onelev_type), intent(inout) :: level
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integer(psb_ipk_), intent(in) :: val
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integer(psb_ipk_), intent(out) :: info
|
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info = psb_success_
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|
|
!
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! This here requires a bit more attention.
|
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!
|
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select case (val)
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case (mld_noprec_)
|
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if (allocated(level%sm)) then
|
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select type (sm => level%sm)
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type is (mld_s_base_smoother_type)
|
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! do nothing
|
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class default
|
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call level%sm%free(info)
|
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if (info == 0) deallocate(level%sm)
|
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if (info == 0) allocate(mld_s_base_smoother_type ::&
|
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& level%sm, stat=info)
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if (info == 0) allocate(mld_s_id_solver_type ::&
|
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& level%sm%sv, stat=info)
|
|
end select
|
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else
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allocate(mld_s_base_smoother_type ::&
|
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& level%sm, stat=info)
|
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if (info ==0) allocate(mld_s_id_solver_type ::&
|
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& level%sm%sv, stat=info)
|
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endif
|
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|
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case (mld_jac_)
|
|
if (allocated(level%sm)) then
|
|
select type (sm => level%sm)
|
|
class is (mld_s_jac_smoother_type)
|
|
! do nothing
|
|
class default
|
|
call level%sm%free(info)
|
|
if (info == 0) deallocate(level%sm)
|
|
if (info == 0) allocate(mld_s_jac_smoother_type :: &
|
|
& level%sm, stat=info)
|
|
if (info == 0) allocate(mld_s_diag_solver_type :: &
|
|
& level%sm%sv, stat=info)
|
|
end select
|
|
else
|
|
allocate(mld_s_jac_smoother_type :: level%sm, stat=info)
|
|
if (info == 0) allocate(mld_s_diag_solver_type ::&
|
|
& level%sm%sv, stat=info)
|
|
endif
|
|
|
|
case (mld_bjac_)
|
|
if (allocated(level%sm)) then
|
|
select type (sm => level%sm)
|
|
class is (mld_s_jac_smoother_type)
|
|
! do nothing
|
|
class default
|
|
call level%sm%free(info)
|
|
if (info == 0) deallocate(level%sm)
|
|
if (info == 0) allocate(mld_s_jac_smoother_type ::&
|
|
& level%sm, stat=info)
|
|
if (info == 0) allocate(mld_s_ilu_solver_type ::&
|
|
& level%sm%sv, stat=info)
|
|
end select
|
|
else
|
|
allocate(mld_s_jac_smoother_type :: level%sm, stat=info)
|
|
if (info == 0) allocate(mld_s_ilu_solver_type ::&
|
|
& level%sm%sv, stat=info)
|
|
endif
|
|
|
|
case (mld_as_)
|
|
if (allocated(level%sm)) then
|
|
select type (sm => level%sm)
|
|
class is (mld_s_as_smoother_type)
|
|
! do nothing
|
|
class default
|
|
call level%sm%free(info)
|
|
if (info == 0) deallocate(level%sm)
|
|
if (info == 0) allocate(mld_s_as_smoother_type ::&
|
|
& level%sm, stat=info)
|
|
if (info == 0) allocate(mld_s_ilu_solver_type ::&
|
|
& level%sm%sv, stat=info)
|
|
end select
|
|
else
|
|
allocate(mld_s_as_smoother_type :: level%sm, stat=info)
|
|
if (info == 0) allocate(mld_s_ilu_solver_type ::&
|
|
& level%sm%sv, stat=info)
|
|
endif
|
|
|
|
case default
|
|
!
|
|
! Do nothing and hope for the best :)
|
|
!
|
|
end select
|
|
if (allocated(level%sm)) &
|
|
& call level%sm%default()
|
|
|
|
end subroutine onelev_set_smoother
|
|
|
|
subroutine onelev_set_solver(level,val,info)
|
|
type(mld_s_onelev_type), intent(inout) :: level
|
|
integer(psb_ipk_), intent(in) :: val
|
|
integer(psb_ipk_), intent(out) :: info
|
|
info = psb_success_
|
|
|
|
!
|
|
! This here requires a bit more attention.
|
|
!
|
|
select case (val)
|
|
case (mld_f_none_)
|
|
if (allocated(level%sm)) then
|
|
if (allocated(level%sm%sv)) then
|
|
select type (sv => level%sm%sv)
|
|
class is (mld_s_id_solver_type)
|
|
! do nothing
|
|
class default
|
|
call level%sm%sv%free(info)
|
|
if (info == 0) deallocate(level%sm%sv)
|
|
if (info == 0) allocate(mld_s_id_solver_type ::&
|
|
& level%sm%sv, stat=info)
|
|
end select
|
|
else
|
|
allocate(mld_s_id_solver_type :: level%sm%sv, stat=info)
|
|
endif
|
|
if (allocated(level%sm)) then
|
|
if (allocated(level%sm%sv)) &
|
|
& call level%sm%sv%default()
|
|
end if
|
|
else
|
|
write(0,*) 'Calling set_solver without a smoother?'
|
|
info = -5
|
|
end if
|
|
|
|
case (mld_diag_scale_)
|
|
if (allocated(level%sm)) then
|
|
if (allocated(level%sm%sv)) then
|
|
select type (sv => level%sm%sv)
|
|
class is (mld_s_diag_solver_type)
|
|
! do nothing
|
|
class default
|
|
call level%sm%sv%free(info)
|
|
if (info == 0) deallocate(level%sm%sv)
|
|
if (info == 0) allocate(mld_s_diag_solver_type ::&
|
|
& level%sm%sv, stat=info)
|
|
end select
|
|
else
|
|
allocate(mld_s_diag_solver_type :: level%sm%sv, stat=info)
|
|
endif
|
|
if (allocated(level%sm)) then
|
|
if (allocated(level%sm%sv)) &
|
|
& call level%sm%sv%default()
|
|
end if
|
|
else
|
|
write(0,*) 'Calling set_solver without a smoother?'
|
|
info = -5
|
|
end if
|
|
|
|
case (mld_gs_)
|
|
if (allocated(level%sm)) then
|
|
if (allocated(level%sm%sv)) then
|
|
select type (sv => level%sm%sv)
|
|
class is (mld_s_gs_solver_type)
|
|
! do nothing
|
|
class default
|
|
call level%sm%sv%free(info)
|
|
if (info == 0) deallocate(level%sm%sv)
|
|
if (info == 0) allocate(mld_s_gs_solver_type ::&
|
|
& level%sm%sv, stat=info)
|
|
end select
|
|
else
|
|
allocate(mld_s_gs_solver_type :: level%sm%sv, stat=info)
|
|
endif
|
|
if (allocated(level%sm%sv)) then
|
|
call level%sm%sv%default()
|
|
else
|
|
endif
|
|
|
|
else
|
|
write(0,*) 'Calling set_solver without a smoother?'
|
|
info = -5
|
|
end if
|
|
|
|
case (mld_ilu_n_,mld_milu_n_,mld_ilu_t_)
|
|
if (allocated(level%sm)) then
|
|
if (allocated(level%sm%sv)) then
|
|
select type (sv => level%sm%sv)
|
|
class is (mld_s_ilu_solver_type)
|
|
! do nothing
|
|
class default
|
|
call level%sm%sv%free(info)
|
|
if (info == 0) deallocate(level%sm%sv)
|
|
if (info == 0) allocate(mld_s_ilu_solver_type ::&
|
|
& level%sm%sv, stat=info)
|
|
end select
|
|
else
|
|
allocate(mld_s_ilu_solver_type :: level%sm%sv, stat=info)
|
|
endif
|
|
if (allocated(level%sm)) then
|
|
if (allocated(level%sm%sv)) &
|
|
& call level%sm%sv%default()
|
|
end if
|
|
call level%sm%sv%set('SUB_SOLVE',val,info)
|
|
else
|
|
write(0,*) 'Calling set_solver without a smoother?'
|
|
info = -5
|
|
end if
|
|
|
|
#ifdef HAVE_SLU_
|
|
case (mld_slu_)
|
|
if (allocated(level%sm)) then
|
|
if (allocated(level%sm%sv)) then
|
|
select type (sv => level%sm%sv)
|
|
class is (mld_s_slu_solver_type)
|
|
! do nothing
|
|
class default
|
|
call level%sm%sv%free(info)
|
|
if (info == 0) deallocate(level%sm%sv)
|
|
if (info == 0) allocate(mld_s_slu_solver_type ::&
|
|
& level%sm%sv, stat=info)
|
|
end select
|
|
else
|
|
allocate(mld_s_slu_solver_type :: level%sm%sv, stat=info)
|
|
endif
|
|
if (allocated(level%sm)) then
|
|
if (allocated(level%sm%sv)) &
|
|
& call level%sm%sv%default()
|
|
end if
|
|
else
|
|
write(0,*) 'Calling set_solver without a smoother?'
|
|
info = -5
|
|
end if
|
|
#endif
|
|
case default
|
|
!
|
|
! Do nothing and hope for the best :)
|
|
!
|
|
end select
|
|
|
|
end subroutine onelev_set_solver
|
|
|
|
|
|
end subroutine mld_scprecseti
|
|
|
|
!
|
|
! Subroutine: mld_sprecsetc
|
|
! Version: real
|
|
!
|
|
! This routine sets the character parameters defining the preconditioner. More
|
|
! precisely, the character parameter identified by 'what' is assigned the value
|
|
! contained in 'val'.
|
|
! For the multilevel preconditioners, the levels are numbered in increasing
|
|
! order starting from the finest one, i.e. level 1 is the finest level.
|
|
!
|
|
! To set integer and real parameters, see mld_sprecseti and mld_sprecsetr,
|
|
! respectively.
|
|
!
|
|
!
|
|
! Arguments:
|
|
! p - type(mld_sprec_type), input/output.
|
|
! The preconditioner data structure.
|
|
! what - integer, input.
|
|
! The number identifying the parameter to be set.
|
|
! A mnemonic constant has been associated to each of these
|
|
! numbers, as reported in the MLD2P4 User's and Reference Guide.
|
|
! string - character(len=*), input.
|
|
! The value of the parameter to be set. The list of allowed
|
|
! values is reported in the MLD2P4 User's and Reference Guide.
|
|
! info - integer, output.
|
|
! Error code.
|
|
! ilev - integer, optional, input.
|
|
! For the multilevel preconditioner, the level at which the
|
|
! preconditioner parameter has to be set.
|
|
! If nlev is not present, the parameter identified by 'what'
|
|
! is set at all the appropriate levels.
|
|
!
|
|
! NOTE: currently, the use of the argument ilev is not "safe" and is reserved to
|
|
! MLD2P4 developers. Indeed, by using ilev it is possible to set different values
|
|
! of the same parameter at different levels 1,...,nlev-1, even in cases where
|
|
! the parameter must have the same value at all the levels but the coarsest one.
|
|
! For this reason, the interface mld_precset to this routine has been built in
|
|
! such a way that ilev is not visible to the user (see mld_prec_mod.f90).
|
|
!
|
|
subroutine mld_scprecsetc(p,what,string,info,ilev)
|
|
|
|
use psb_base_mod
|
|
use mld_s_prec_mod, mld_protect_name => mld_scprecsetc
|
|
|
|
implicit none
|
|
|
|
! Arguments
|
|
class(mld_sprec_type), intent(inout) :: p
|
|
character(len=*), intent(in) :: what
|
|
character(len=*), intent(in) :: string
|
|
integer(psb_ipk_), intent(out) :: info
|
|
integer(psb_ipk_), optional, intent(in) :: ilev
|
|
|
|
! Local variables
|
|
integer(psb_ipk_) :: ilev_, nlev_,val
|
|
character(len=*), parameter :: name='mld_precsetc'
|
|
|
|
info = psb_success_
|
|
|
|
if (.not.allocated(p%precv)) then
|
|
info = 3111
|
|
return
|
|
endif
|
|
nlev_ = size(p%precv)
|
|
|
|
if (present(ilev)) then
|
|
ilev_ = ilev
|
|
else
|
|
ilev_ = 1
|
|
end if
|
|
|
|
if ((ilev_<1).or.(ilev_ > nlev_)) then
|
|
write(psb_err_unit,*) name,&
|
|
& ': Error: invalid ILEV/NLEV combination',ilev_, nlev_
|
|
info = -1
|
|
return
|
|
endif
|
|
|
|
val = mld_stringval(string)
|
|
if (val >=0) then
|
|
call p%set(what,val,info,ilev=ilev)
|
|
else
|
|
call p%precv(ilev_)%set(what,string,info)
|
|
end if
|
|
|
|
end subroutine mld_scprecsetc
|
|
|
|
|
|
!
|
|
! Subroutine: mld_sprecsetr
|
|
! Version: real
|
|
!
|
|
! This routine sets the real parameters defining the preconditioner. More
|
|
! precisely, the real parameter identified by 'what' is assigned the value
|
|
! contained in 'val'.
|
|
! For the multilevel preconditioners, the levels are numbered in increasing
|
|
! order starting from the finest one, i.e. level 1 is the finest level.
|
|
!
|
|
! To set integer and character parameters, see mld_sprecseti and mld_sprecsetc,
|
|
! respectively.
|
|
!
|
|
! Arguments:
|
|
! p - type(mld_sprec_type), input/output.
|
|
! The preconditioner data structure.
|
|
! what - integer, input.
|
|
! The number identifying the parameter to be set.
|
|
! A mnemonic constant has been associated to each of these
|
|
! numbers, as reported in the MLD2P4 User's and Reference Guide.
|
|
! val - real(psb_spk_), input.
|
|
! The value of the parameter to be set. The list of allowed
|
|
! values is reported in the MLD2P4 User's and Reference Guide.
|
|
! info - integer, output.
|
|
! Error code.
|
|
! ilev - integer, optional, input.
|
|
! For the multilevel preconditioner, the level at which the
|
|
! preconditioner parameter has to be set.
|
|
! If nlev is not present, the parameter identified by 'what'
|
|
! is set at all the appropriate levels.
|
|
!
|
|
! NOTE: currently, the use of the argument ilev is not "safe" and is reserved to
|
|
! MLD2P4 developers. Indeed, by using ilev it is possible to set different values
|
|
! of the same parameter at different levels 1,...,nlev-1, even in cases where
|
|
! the parameter must have the same value at all the levels but the coarsest one.
|
|
! For this reason, the interface mld_precset to this routine has been built in
|
|
! such a way that ilev is not visible to the user (see mld_prec_mod.f90).
|
|
!
|
|
subroutine mld_scprecsetr(p,what,val,info,ilev)
|
|
|
|
use psb_base_mod
|
|
use mld_s_prec_mod, mld_protect_name => mld_scprecsetr
|
|
|
|
implicit none
|
|
|
|
! Arguments
|
|
class(mld_sprec_type), intent(inout) :: p
|
|
character(len=*), intent(in) :: what
|
|
real(psb_spk_), intent(in) :: val
|
|
integer(psb_ipk_), intent(out) :: info
|
|
integer(psb_ipk_), optional, intent(in) :: ilev
|
|
|
|
! Local variables
|
|
integer(psb_ipk_) :: ilev_,nlev_
|
|
real(psb_spk_) :: thr
|
|
character(len=*), parameter :: name='mld_precsetr'
|
|
|
|
info = psb_success_
|
|
|
|
if (present(ilev)) then
|
|
ilev_ = ilev
|
|
else
|
|
ilev_ = 1
|
|
end if
|
|
|
|
if (.not.allocated(p%precv)) then
|
|
write(psb_err_unit,*) name,&
|
|
&': Error: uninitialized preconditioner,',&
|
|
&' should call MLD_PRECINIT'
|
|
info = 3111
|
|
return
|
|
endif
|
|
nlev_ = size(p%precv)
|
|
|
|
if ((ilev_<1).or.(ilev_ > nlev_)) then
|
|
write(psb_err_unit,*) name,&
|
|
& ': Error: invalid ILEV/NLEV combination',&
|
|
& ilev_, nlev_
|
|
info = -1
|
|
return
|
|
endif
|
|
|
|
!
|
|
! Set preconditioner parameters at level ilev.
|
|
!
|
|
if (present(ilev)) then
|
|
|
|
call p%precv(ilev_)%set(what,val,info)
|
|
|
|
else if (.not.present(ilev)) then
|
|
!
|
|
! ilev not specified: set preconditioner parameters at all the appropriate levels
|
|
!
|
|
|
|
select case(psb_toupper(what))
|
|
case('COARSE_ILUTHRS')
|
|
ilev_=nlev_
|
|
call p%precv(ilev_)%set('SUB_ILUTHRS',val,info)
|
|
|
|
case('AGGR_THRESH')
|
|
thr = val
|
|
do ilev_ = 2, nlev_
|
|
call p%precv(ilev_)%set('AGGR_THRESH',thr,info)
|
|
thr = thr * p%precv(ilev_)%parms%aggr_scale
|
|
end do
|
|
|
|
case default
|
|
|
|
do ilev_=1,nlev_
|
|
call p%precv(ilev_)%set(what,val,info)
|
|
end do
|
|
end select
|
|
|
|
endif
|
|
|
|
end subroutine mld_scprecsetr
|
|
|
|
|