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amg4psblas/amgprec/impl/amg_dcprecset.F90

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Fortran
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!
!
! AMG4PSBLAS version 1.0
! Algebraic Multigrid Package
! based on PSBLAS (Parallel Sparse BLAS version 3.7)
!
! (C) Copyright 2021
!
! Salvatore Filippone
! Pasqua D'Ambra
! Fabio Durastante
!
! 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 AMG4PSBLAS 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 AMG4PSBLAS 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: amg_dprecset.f90
!
! Subroutine: amg_dprecseti
! Version: real
!
! This routine sets the integer parameters defining the preconditioner. More
! precisely, the integer 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 character and real parameters, see amg_dprecsetc and amg_dprecsetr,
! respectively.
!
!
! Arguments:
! p - type(amg_dprec_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 AMG4PSBLAS User's and Reference Guide.
! val - integer, input.
! The value of the parameter to be set. The list of allowed
! values is reported in the AMG4PSBLAS 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
! AMG4PSBLAS 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 amg_precset to this routine has been built in
! such a way that ilev is not visible to the user (see amg_prec_mod.f90).
!
subroutine amg_dcprecseti(p,what,val,info,ilev,ilmax,pos,idx)
use psb_base_mod
use amg_d_prec_mod, amg_protect_name => amg_dcprecseti
use amg_d_jac_smoother
use amg_d_as_smoother
use amg_d_diag_solver
use amg_d_l1_diag_solver
use amg_d_ilu_solver
use amg_d_jac_solver
use amg_d_id_solver
use amg_d_gs_solver
use amg_d_ainv_solver
use amg_d_invk_solver
use amg_d_invt_solver
#if defined(HAVE_UMF_)
use amg_d_umf_solver
#endif
#if defined(HAVE_SLUDIST_)
use amg_d_sludist_solver
#endif
#if defined(HAVE_SLU_)
use amg_d_slu_solver
#endif
#if defined(HAVE_MUMPS_)
use amg_d_mumps_solver
#endif
implicit none
! Arguments
class(amg_dprec_type), intent(inout) :: p
character(len=*), intent(in) :: what
integer(psb_ipk_), intent(in) :: val
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_), optional, intent(in) :: ilev,ilmax
character(len=*), optional, intent(in) :: pos
integer(psb_ipk_), intent(in), optional :: idx
! Local variables
integer(psb_ipk_) :: ilev_, nlev_, ilmax_, il
character(len=*), parameter :: name='amg_precseti'
info = psb_success_
if (.not.allocated(p%precv)) then
info = 3111
write(psb_err_unit,*) name,&
& ': Error: uninitialized preconditioner,',&
&' should call amg_PRECINIT'
return
endif
nlev_ = size(p%precv)
if (present(ilev)) then
ilev_ = ilev
if (present(ilmax)) then
ilmax_ = ilmax
else
ilmax_ = ilev_
end if
else
ilev_ = 1
ilmax_ = nlev_
end if
if ((ilev_<1).or.(ilev_ > nlev_)) then
info = -1
write(psb_err_unit,*) name,&
&': Error: invalid ILEV/NLEV combination',ilev_, nlev_
return
endif
if ((ilmax_<1).or.(ilmax_ > nlev_)) then
info = -1
write(psb_err_unit,*) name,&
&': Error: invalid ILMAX/NLEV combination',ilmax_, nlev_
return
endif
select case(psb_toupper(what))
case ('MIN_COARSE_SIZE')
p%ag_data%min_coarse_size = max(val,-1)
return
case ('MIN_COARSE_SIZE_PER_PROCESS')
p%ag_data%min_coarse_size_per_process = max(val,-1)
return
case('MAX_LEVS')
p%ag_data%max_levs = max(val,1)
return
case ('OUTER_SWEEPS')
p%outer_sweeps = max(val,1)
return
end select
!
! Set preconditioner parameters at level ilev.
!
if (present(ilev)) then
select case(psb_toupper(what))
case('SUB_OVR','SUB_FILLIN','SMOOTHER_SWEEPS')
do il=ilev_, ilmax_
call p%precv(il)%set(what,val,info,pos=pos)
end do
case('COARSE_SWEEPS')
if (ilev_ /= nlev_) then
write(psb_err_unit,*) name,&
& ': Error: Inconsistent specification of WHAT vs. ILEV'
info = -2
return
end if
call p%precv(nlev_)%set('SMOOTHER_SWEEPS',val,info,pos=pos)
case('COARSE_FILLIN')
if (ilev_ /= nlev_) then
write(psb_err_unit,*) name,&
& ': Error: Inconsistent specification of WHAT vs. ILEV'
info = -2
return
end if
call p%precv(nlev_)%set('SUB_FILLIN',val,info,pos=pos)
case('COARSE_INVFILL')
if (ilev_ /= nlev_) then
write(psb_err_unit,*) name,&
& ': Error: Inconsistent specification of WHAT vs. ILEV'
info = -2
return
end if
call p%precv(nlev_)%set('INV_FILLIN',val,info,pos=pos)
case('BJAC_ITRACE')
if (ilev_ /= nlev_) then
write(psb_err_unit,*) name,&
& ': Error: Inconsistent specification of WHAT vs. ILEV'
info = -2
return
end if
call p%precv(nlev_)%set('SMOOTHER_ITRACE',val,info,pos=pos)
case('BJAC_RESCHECK')
if (ilev_ /= nlev_) then
write(psb_err_unit,*) name,&
& ': Error: Inconsistent specification of WHAT vs. ILEV'
info = -2
return
end if
call p%precv(nlev_)%set('SMOOTHER_RESIDUAL',val,info,pos=pos)
case default
do il=ilev_, ilmax_
call p%precv(il)%set(what,val,info,pos=pos,idx=idx)
end do
end select
else if (.not.present(ilev)) then
!
! ilev not specified: set preconditioner parameters at all the appropriate
! levels
!
select case(psb_toupper(trim(what)))
case('SUB_OVR','SUB_FILLIN','SMOOTHER_SWEEPS')
do ilev_=1,max(1,nlev_-1)
call p%precv(ilev_)%set(what,val,info,pos=pos)
if (info /= 0) return
end do
case('COARSE_SWEEPS')
if (nlev_ > 1) then
call p%precv(nlev_)%set('SMOOTHER_SWEEPS',val,info,pos=pos)
end if
case('COARSE_FILLIN')
if (nlev_ > 1) then
call p%precv(nlev_)%set('SUB_FILLIN',val,info,pos=pos)
end if
case('COARSE_INVFILL')
if (nlev_ > 1) then
call p%precv(nlev_)%set('INV_FILLIN',val,info,pos=pos)
end if
case('BJAC_ITRACE')
if (nlev_ > 1) then
call p%precv(nlev_)%set('SMOOTHER_ITRACE',val,info,pos=pos)
end if
case('BJAC_RESCHECK')
if (nlev_ > 1) then
call p%precv(nlev_)%set('SMOOTHER_RESIDUAL',val,info,pos=pos)
end if
case default
do ilev_=1,nlev_
call p%precv(ilev_)%set(what,val,info,pos=pos,idx=idx)
end do
end select
endif
end subroutine amg_dcprecseti
!
! Subroutine: amg_dprecsetc
! 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 amg_dprecseti and amg_dprecsetr,
! respectively.
!
!
! Arguments:
! p - type(amg_dprec_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 AMG4PSBLAS 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 AMG4PSBLAS 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
! AMG4PSBLAS 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 amg_precset to this routine has been built in
! such a way that ilev is not visible to the user (see amg_prec_mod.f90).
!
subroutine amg_dcprecsetc(p,what,string,info,ilev,ilmax,pos,idx)
use psb_base_mod
use amg_d_prec_mod, amg_protect_name => amg_dcprecsetc
use amg_d_jac_smoother
use amg_d_as_smoother
use amg_d_diag_solver
use amg_d_l1_diag_solver
use amg_d_ilu_solver
use amg_d_jac_solver
use amg_d_id_solver
use amg_d_gs_solver
use amg_d_ainv_solver
use amg_d_invk_solver
use amg_d_invt_solver
#if defined(HAVE_UMF_)
use amg_d_umf_solver
#endif
#if defined(HAVE_SLUDIST_)
use amg_d_sludist_solver
#endif
#if defined(HAVE_SLU_)
use amg_d_slu_solver
#endif
#if defined(HAVE_MUMPS_)
use amg_d_mumps_solver
#endif
use amg_d_krm_solver, only : amg_d_krm_solver_type
implicit none
! Arguments
class(amg_dprec_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,ilmax
character(len=*), optional, intent(in) :: pos
integer(psb_ipk_), intent(in), optional :: idx
! Local variables
integer(psb_ipk_) :: ilev_, nlev_,val,ilmax_, il
character(len=*), parameter :: name='amg_precsetc'
logical :: hier_asb
info = psb_success_
if (.not.allocated(p%precv)) then
info = 3111
write(psb_err_unit,*) name,&
& ': Error: uninitialized preconditioner,',&
&' should call amg_PRECINIT'
return
endif
nlev_ = size(p%precv)
if (present(ilev)) then
ilev_ = ilev
if (present(ilmax)) then
ilmax_ = ilmax
else
ilmax_ = ilev_
end if
else
ilev_ = 1
ilmax_ = nlev_
end if
if ((ilev_<1).or.(ilev_ > nlev_)) then
info = -1
write(psb_err_unit,*) name,&
&': Error: invalid ILEV/NLEV combination',ilev_, nlev_
return
endif
if ((ilmax_<1).or.(ilmax_ > nlev_)) then
info = -1
write(psb_err_unit,*) name,&
&': Error: invalid ILMAX/NLEV combination',ilmax_, nlev_
return
endif
!
! Set preconditioner parameters at level ilev.
!
if (present(ilev)) then
select case(psb_toupper(what))
case('SMOOTHER_TYPE')
! Select the type of smoother between the one implemented in the library
! every new smoother should be added here
select case(psb_toupper(string))
case ('BJAC')
do il=ilev_, ilmax_
call p%precv(il)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
end do
case ('L1-BJAC')
do il=ilev_, ilmax_
call p%precv(il)%set('SMOOTHER_TYPE',amg_l1_bjac_,info,pos=pos)
end do
case('GS','FWGS','FBGS')
do il=ilev_, ilmax_
call p%precv(il)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(il)%set('SUB_SOLVE',amg_gs_,info,pos=pos)
end do
case('L1-GS','L1-FWGS','L1-FBGS')
do il=ilev_, ilmax_
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_l1_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_gs_,info,pos=pos)
end do
case ('BWGS')
do il=ilev_, ilmax_
call p%precv(il)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(il)%set('SUB_SOLVE',amg_bwgs_,info,pos=pos)
end do
case('JACOBI')
do il=ilev_, ilmax_
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_diag_scale_,info,pos=pos)
end do
case('L1-JACOBI')
do il=ilev_, ilmax_
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_l1_diag_scale_,info,pos=pos)
end do
end select
case('SUB_SOLVE','ML_CYCLE','PAR_AGGR_ALG','AGGR_TYPE','SUB_RESTR'&
& ,'SUB_PROL')
! These are handled elsewhere
do il=ilev_, ilmax_
call p%precv(nlev_)%set(what,string,info,pos=pos)
end do
case('COARSE_MAT')
! Select if the coarsest matrix is handled in a distributed way, few
! rows per rank, or if it is replicated completely on every rank
select case(psb_toupper(string))
case('DISTR')
do il=ilev_, ilmax_
call p%precv(il)%set(what,amg_distr_mat_,info,pos=pos)
end do
case('REPL')
do il=ilev_, ilmax_
call p%precv(il)%set(what,amg_repl_mat_,info,pos=pos)
end do
case('BJAC_STOP')
do il=ilev_, ilmax_
call p%precv(il)%set('SMOOTHER_STOP',string,info,pos=pos)
end do
case('BJAC_TRACE')
do il=ilev_, ilmax_
call p%precv(il)%set('SMOOTHER_TRACE',string,info,pos=pos)
end do
case('COARSE_SUBSOLVE')
if (ilev_ /= nlev_) then
write(psb_err_unit,*) name,&
& ': Error: Inconsistent specification of WHAT vs. ILEV'
info = -2
return
end if
call p%precv(ilev_)%set('SUB_SOLVE',string,info,pos=pos)
case('COARSE_SOLVE')
if (ilev_ /= nlev_) then
write(psb_err_unit,*) name,&
& ': Error: Inconsistent specification of WHAT vs. ILEV'
info = -2
return
end if
if (nlev_ > 1) then
hier_asb = p%precv(nlev_)%ac%is_asb()
select case (psb_toupper(string))
case('BJAC')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
#if defined(HAVE_UMF_)
call p%precv(nlev_)%set('SUB_SOLVE',amg_umf_,info,pos=pos)
#elif defined(HAVE_SLU_)
call p%precv(nlev_)%set('SUB_SOLVE',amg_slu_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set('SUB_SOLVE',amg_mumps_,info,pos=pos)
#else
call p%precv(nlev_)%set('SUB_SOLVE',amg_ilu_n_,info,pos=pos)
#endif
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info)
case('L1-BJAC')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_l1_bjac_,info,pos=pos)
#if defined(HAVE_UMF_)
call p%precv(nlev_)%set('SUB_SOLVE',amg_umf_,info,pos=pos)
#elif defined(HAVE_SLU_)
call p%precv(nlev_)%set('SUB_SOLVE',amg_slu_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set('SUB_SOLVE',amg_mumps_,info,pos=pos)
#else
call p%precv(nlev_)%set('SUB_SOLVE',amg_ilu_n_,info,pos=pos)
#endif
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info)
case('SLU')
#if defined(HAVE_SLU_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_slu_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_repl_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_repl_mat_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_mumps_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#else
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_ilu_n_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#endif
case('ILU')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_ilu_n_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_repl_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_repl_mat_,info,pos=pos)
case('ILUT')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_ilu_t_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_repl_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_repl_mat_,info,pos=pos)
case('MILU')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_milu_n_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_repl_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_repl_mat_,info,pos=pos)
case('MUMPS')
#if defined(HAVE_MUMPS_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_mumps_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#else
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_ilu_n_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#endif
case('UMF')
#if defined(HAVE_UMF_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_umf_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_repl_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_repl_mat_,info,pos=pos)
#elif defined(HAVE_SLU_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_slu_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_repl_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_repl_mat_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_mumps_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#else
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_ilu_n_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#endif
case('SLUDIST')
#if defined(HAVE_SLUDIST_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_sludist_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#elif defined(HAVE_UMF_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_umf_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_repl_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_repl_mat_,info,pos=pos)
#elif defined(HAVE_SLU_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_slu_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_repl_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_repl_mat_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_mumps_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#else
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_ilu_n_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#endif
case('JACOBI','JAC')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_diag_scale_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
case('L1-JACOBI','L1-JAC')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_l1_diag_scale_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
case('GS','FBGS')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_gs_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
case('BWGS')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_bwgs_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
case('L1-GS','L1-FBGS')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_l1_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_gs_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
case('KRM')
block
type(amg_d_krm_solver_type) :: krm_slv
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_krm_,info,pos=pos)
call p%precv(nlev_)%set(krm_slv,info)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
end block
end select
end if
end select
case default
do il=ilev_, ilmax_
call p%precv(il)%set(what,string,info,pos=pos,idx=idx)
end do
end select
else if (.not.present(ilev)) then
!
! ilev not specified: set preconditioner parameters at all the appropriate
! levels
!
select case(psb_toupper(trim(what)))
case('SUB_SOLVE','SUB_RESTR','SUB_PROL',&
& 'SMOOTHER_TYPE')
do ilev_=1,max(1,nlev_-1)
call p%precv(ilev_)%set(what,string,info,pos=pos)
if (info /= 0) return
end do
case('ML_CYCLE','PAR_AGGR_ALG','AGGR_ORD','AGGR_PROL','AGGR_TYPE',&
& 'AGGR_OMEGA_ALG','AGGR_EIG','AGGR_FILTER')
do ilev_=1,nlev_
call p%precv(ilev_)%set(what,string,info,pos=pos)
if (info /= 0) return
end do
case('COARSE_MAT')
if (nlev_ > 1) then
hier_asb = p%precv(nlev_)%ac%is_asb()
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_stringval(string))
call p%precv(nlev_)%set('COARSE_MAT',string,info,pos=pos)
end if
case('COARSE_SOLVE')
if (nlev_ > 1) then
hier_asb = p%precv(nlev_)%ac%is_asb()
call p%precv(nlev_)%set('COARSE_SOLVE',string,info,pos=pos)
select case (psb_toupper(trim(string)))
case('BJAC')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
#if defined(HAVE_UMF_)
call p%precv(nlev_)%set('SUB_SOLVE',amg_umf_,info,pos=pos)
#elif defined(HAVE_SLU_)
call p%precv(nlev_)%set('SUB_SOLVE',amg_slu_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set('SUB_SOLVE',amg_mumps_,info,pos=pos)
#else
call p%precv(nlev_)%set('SUB_SOLVE',amg_ilu_n_,info,pos=pos)
#endif
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info)
case('L1-BJAC')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_l1_bjac_,info,pos=pos)
#if defined(HAVE_UMF_)
call p%precv(nlev_)%set('SUB_SOLVE',amg_umf_,info,pos=pos)
#elif defined(HAVE_SLU_)
call p%precv(nlev_)%set('SUB_SOLVE',amg_slu_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set('SUB_SOLVE',amg_mumps_,info,pos=pos)
#else
call p%precv(nlev_)%set('SUB_SOLVE',amg_ilu_n_,info,pos=pos)
#endif
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info)
case('SLU')
#if defined(HAVE_SLU_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_slu_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_repl_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_repl_mat_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_mumps_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#else
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_ilu_n_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#endif
case('ILU')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_ilu_n_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_repl_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_repl_mat_,info,pos=pos)
case('ILUT')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_ilu_t_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_repl_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_repl_mat_,info,pos=pos)
case('MILU')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_milu_n_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_repl_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_repl_mat_,info,pos=pos)
case('MUMPS')
#if defined(HAVE_MUMPS_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_mumps_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#else
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_ilu_n_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#endif
case('UMF')
#if defined(HAVE_UMF_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_umf_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_repl_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_repl_mat_,info,pos=pos)
#elif defined(HAVE_SLU_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_slu_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_repl_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_repl_mat_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_mumps_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#else
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_ilu_n_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#endif
case('SLUDIST')
#if defined(HAVE_SLUDIST_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_sludist_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#elif defined(HAVE_UMF_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_umf_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_repl_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_repl_mat_,info,pos=pos)
#elif defined(HAVE_SLU_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_slu_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_repl_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_repl_mat_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_mumps_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#else
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_ilu_n_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
#endif
case('JACOBI','JAC')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_diag_scale_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
case('L1-JACOBI','L1-JAC')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_l1_diag_scale_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
case('GS','FBGS')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_gs_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
case('BWGS')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_bwgs_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
case('L1-FBGS','L1-GS')
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_l1_bjac_,info,pos=pos)
call p%precv(nlev_)%set('SUB_SOLVE',amg_gs_,info,pos=pos)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
case('KRM')
block
type(amg_d_krm_solver_type) :: krm_slv
call p%precv(nlev_)%set('SMOOTHER_TYPE',amg_krm_,info,pos=pos)
call p%precv(nlev_)%set(krm_slv,info)
if (hier_asb) &
& call amg_warn_coarse_mat(p%precv(nlev_)%parms%get_coarse_mat(),&
& amg_distr_mat_)
call p%precv(nlev_)%set('COARSE_MAT',amg_distr_mat_,info,pos=pos)
end block
end select
endif
case('BJAC_STOP')
if (nlev_ > 1) then
call p%precv(il)%set('SMOOTHER_STOP',string,info,pos=pos)
end if
case('BJAC_TRACE')
if (nlev_ > 1) then
call p%precv(il)%set('SMOOTHER_TRACE',string,info,pos=pos)
end if
case('COARSE_SUBSOLVE')
if (nlev_ > 1) then
call p%precv(nlev_)%set('SUB_SOLVE',string,info,pos=pos)
endif
case default
do ilev_=1,nlev_
call p%precv(ilev_)%set(what,string,info,pos=pos,idx=idx)
end do
end select
endif
end subroutine amg_dcprecsetc
!
! Subroutine: amg_dprecsetr
! 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 amg_dprecseti and amg_dprecsetc,
! respectively.
!
! Arguments:
! p - type(amg_dprec_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 AMG4PSBLAS User's and Reference Guide.
! val - real(psb_dpk_), input.
! The value of the parameter to be set. The list of allowed
! values is reported in the AMG4PSBLAS 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
! AMG4PSBLAS 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 amg_precset to this routine has been built in
! such a way that ilev is not visible to the user (see amg_prec_mod.f90).
!
subroutine amg_dcprecsetr(p,what,val,info,ilev,ilmax,pos,idx)
use psb_base_mod
use amg_d_prec_mod, amg_protect_name => amg_dcprecsetr
implicit none
! Arguments
class(amg_dprec_type), intent(inout) :: p
character(len=*), intent(in) :: what
real(psb_dpk_), intent(in) :: val
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_), optional, intent(in) :: ilev,ilmax
character(len=*), optional, intent(in) :: pos
integer(psb_ipk_), intent(in), optional :: idx
! Local variables
integer(psb_ipk_) :: ilev_,nlev_, ilmax_, il
real(psb_dpk_) :: thr
character(len=*), parameter :: name='amg_precsetr'
info = psb_success_
if (present(ilev)) then
ilev_ = ilev
else
ilev_ = 1
end if
select case(psb_toupper(what))
case ('MIN_CR_RATIO')
p%ag_data%min_cr_ratio = max(done,val)
return
end select
if (.not.allocated(p%precv)) then
write(psb_err_unit,*) name,&
&': Error: uninitialized preconditioner,',&
&' should call amg_PRECINIT'
info = 3111
return
endif
nlev_ = size(p%precv)
if (present(ilev)) then
ilev_ = ilev
if (present(ilmax)) then
ilmax_ = ilmax
else
ilmax_ = ilev_
end if
else
ilev_ = 1
ilmax_ = nlev_
end if
if ((ilev_<1).or.(ilev_ > nlev_)) then
info = -1
write(psb_err_unit,*) name,&
&': Error: invalid ILEV/NLEV combination',ilev_, nlev_
return
endif
if ((ilmax_<1).or.(ilmax_ > nlev_)) then
info = -1
write(psb_err_unit,*) name,&
&': Error: invalid ILMAX/NLEV combination',ilmax_, nlev_
return
endif
!
! Set preconditioner parameters at level ilev.
!
if (present(ilev)) then
select case(psb_toupper(trim(what)))
case('BJAC_STOPTOL')
do il=ilev_, ilmax_
call p%precv(il)%set('SMOOTHER_STOPTOL',val,info,pos=pos)
end do
case default
! Nothing to do here, setted elsewhere
do il=ilev_, ilmax_
call p%precv(il)%set(what,val,info,pos=pos,idx=idx)
end do
end select
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,pos=pos)
case('BJAC_STOPTOL')
ilev_=nlev_
call p%precv(ilev_)%set('SMOOTHER_STOPTOL',val,info,pos=pos)
case default
do il=1,nlev_
call p%precv(il)%set(what,val,info,pos=pos,idx=idx)
end do
end select
endif
end subroutine amg_dcprecsetr
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