! ! ! MLD2P4 version 2.1 ! MultiLevel Domain Decomposition Parallel Preconditioners Package ! based on PSBLAS (Parallel Sparse BLAS version 3.4) ! ! (C) Copyright 2008, 2010, 2012, 2015, 2017 ! ! Salvatore Filippone Cranfield University ! Ambra Abdullahi Hassan University of Rome Tor Vergata ! Alfredo Buttari CNRS-IRIT, Toulouse ! Pasqua D'Ambra ICAR-CNR, Naples ! Daniela di Serafino University of Campania "L. Vanvitelli", Caserta ! ! 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_c_smoothers_bld.f90 ! ! Subroutine: mld_c_smoothers_bld ! Version: complex ! ! This routine performs the final phase of the multilevel preconditioner ! build process: builds the "smoother" objects at each level, ! based on the matrix hierarchy prepared by mld_c_hierarchy_bld. ! ! A multilevel preconditioner is regarded as an array of 'one-level' ! data structures, each containing the part of the ! preconditioner associated to a certain level, ! (for more details see the description of mld_Tonelev_type in mld_prec_type.f90). ! The levels are numbered in increasing order starting from the finest one, i.e. ! level 1 is the finest level. No transfer operators are associated to level 1. ! Each level provides a "build" method; for the base type, the "one-level" ! build procedure simply invokes the build method of the first smoother object, ! and also on the second object if allocated. ! ! ! Arguments: ! a - type(psb_cspmat_type). ! The sparse matrix structure containing the local part of the ! matrix to be preconditioned. ! desc_a - type(psb_desc_type), input. ! The communication descriptor of a. ! p - type(mld_cprec_type), input/output. ! The preconditioner data structure containing the local part ! of the preconditioner to be built. ! info - integer, output. ! Error code. ! ! amold - class(psb_c_base_sparse_mat), input, optional ! Mold for the inner format of matrices contained in the ! preconditioner ! ! ! vmold - class(psb_c_base_vect_type), input, optional ! Mold for the inner format of vectors contained in the ! preconditioner ! ! ! subroutine mld_c_smoothers_bld(a,desc_a,prec,info,amold,vmold,imold) use psb_base_mod !use mld_c_inner_mod use mld_c_prec_mod, mld_protect_name => mld_c_smoothers_bld Implicit None ! Arguments type(psb_cspmat_type),intent(in), target :: a type(psb_desc_type), intent(inout), target :: desc_a class(mld_cprec_type),intent(inout),target :: prec integer(psb_ipk_), intent(out) :: info class(psb_c_base_sparse_mat), intent(in), optional :: amold class(psb_c_base_vect_type), intent(in), optional :: vmold class(psb_i_base_vect_type), intent(in), optional :: imold ! Local Variables integer(psb_ipk_) :: ictxt, me,np integer(psb_ipk_) :: err,i,k, err_act, iszv, newsz, casize, nplevs, mxplevs real(psb_spk_) :: mnaggratio integer(psb_ipk_) :: ipv(mld_ifpsz_), val, coarse_solve_id integer(psb_ipk_) :: int_err(5) integer(psb_ipk_) :: debug_level, debug_unit character(len=20) :: name, ch_err if (psb_get_errstatus().ne.0) return info=psb_success_ err=0 call psb_erractionsave(err_act) debug_unit = psb_get_debug_unit() debug_level = psb_get_debug_level() name = 'mld_c_smoothers_bld' info = psb_success_ int_err(1) = 0 ictxt = desc_a%get_context() call psb_info(ictxt, me, np) if (debug_level >= psb_debug_outer_) & & write(debug_unit,*) me,' ',trim(name),& & 'Entering ' ! if (.not.allocated(prec%precv)) then !! Error: should have called mld_cprecinit info=3111 call psb_errpush(info,name) goto 9999 end if ! ! Check to ensure all procs have the same ! iszv = size(prec%precv) call psb_bcast(ictxt,iszv) if (iszv /= size(prec%precv)) then info=psb_err_internal_error_ call psb_errpush(info,name,a_err='Inconsistent size of precv') goto 9999 end if if (iszv < 1) then ! We should never get here. info=psb_err_from_subroutine_ ch_err='size bpv' call psb_errpush(info,name,a_err=ch_err) goto 9999 endif ! ! Now do the real build. ! do i=1, iszv ! ! build the base preconditioner at level i ! call prec%precv(i)%bld(info,amold=amold,vmold=vmold,imold=imold) if (info /= psb_success_) then write(ch_err,'(a,i7)') 'Error @ level',i call psb_errpush(psb_err_internal_error_,name,& & a_err=ch_err) goto 9999 endif end do ! ! Issue a warning for inconsistent changes to COARSE_SOLVE ! if (me == psb_root_) then coarse_solve_id = prec%precv(iszv)%parms%coarse_solve select case (coarse_solve_id) case(mld_umf_,mld_slu_) if (prec%precv(iszv)%sm%sv%get_id() /= coarse_solve_id) then write(psb_err_unit,*) & & 'MLD2P4: Warning: original coarse solver was requested as ',& & mld_fact_names(coarse_solve_id) if (prec%precv(iszv)%parms%coarse_mat == mld_repl_mat_) then write(psb_err_unit,*) ' but I am building ',& & mld_fact_names(prec%precv(iszv)%sm%sv%get_id()) else if (prec%precv(iszv)%parms%coarse_mat == mld_distr_mat_) then write(psb_err_unit,*) ' but I am building BJAC with ',& & mld_fact_names(prec%precv(iszv)%sm%sv%get_id()) else write(psb_err_unit,*) ' but I am building ',& & mld_fact_names(prec%precv(iszv)%sm%sv%get_id()) end if write(psb_err_unit,*) 'This may happen if: ' write(psb_err_unit,*) ' 1. coarse_subsolve has been reset, or ' write(psb_err_unit,*) ' 2. the solver ', mld_fact_names(coarse_solve_id),& & ' was not configured at MLD2P4 build time, or' write(psb_err_unit,*) ' 3. an unsupported solver setup was specified.' end if if (prec%precv(iszv)%parms%coarse_mat /= mld_repl_mat_) then write(psb_err_unit,*) & & 'MLD2P4: Warning: original coarse matrix was requested as replicated', & & ' but it has been changed to distributed.' end if case(mld_ilu_n_, mld_ilu_t_,mld_milu_n_) if (prec%precv(iszv)%sm%sv%get_id() /= mld_ilu_n_) then write(psb_err_unit,*) & & 'MLD2P4: Warning: original coarse solver was requested as ',& & mld_fact_names(coarse_solve_id) if (prec%precv(iszv)%parms%coarse_mat == mld_repl_mat_) then write(psb_err_unit,*) ' but I am building ',& & mld_fact_names(prec%precv(iszv)%sm%sv%get_id()) else if (prec%precv(iszv)%parms%coarse_mat == mld_distr_mat_) then write(psb_err_unit,*) ' but I am building BJAC with ',& & mld_fact_names(prec%precv(iszv)%sm%sv%get_id()) else write(psb_err_unit,*) ' but I am building ',& & mld_fact_names(prec%precv(iszv)%sm%sv%get_id()) end if write(psb_err_unit,*) & &'This may happen if coarse_subsolve has been reset' end if if (prec%precv(iszv)%parms%coarse_mat /= mld_repl_mat_) then write(psb_err_unit,*) & & 'MLD2P4: Warning: original coarse solver was requested as ',& & mld_fact_names(coarse_solve_id),& & ' but the coarse matrix has been changed to distributed' end if case(mld_mumps_) if (prec%precv(iszv)%sm%sv%get_id() /= mld_mumps_) then write(psb_err_unit,*) & & 'MLD2P4: Warning: original coarse solver was requested as ',& & mld_fact_names(coarse_solve_id) if (prec%precv(iszv)%parms%coarse_mat == mld_repl_mat_) then write(psb_err_unit,*) ' but I am building ',& & mld_fact_names(prec%precv(iszv)%sm%sv%get_id()) else if (prec%precv(iszv)%parms%coarse_mat == mld_distr_mat_) then write(psb_err_unit,*) ' but I am building BJAC with ',& & mld_fact_names(prec%precv(iszv)%sm%sv%get_id()) else write(psb_err_unit,*) ' but I am building ',& & mld_fact_names(prec%precv(iszv)%sm%sv%get_id()) end if write(psb_err_unit,*) 'This may happen if: ' write(psb_err_unit,*) ' 1. coarse_subsolve has been reset, or ' write(psb_err_unit,*) ' 2. the solver ', mld_fact_names(coarse_solve_id),& & ' was not configured at MLD2P4 build time, or' write(psb_err_unit,*) ' 3. an unsupported solver setup was specified.' end if case(mld_sludist_) if (prec%precv(iszv)%sm%sv%get_id() /= coarse_solve_id) then write(psb_err_unit,*) & & 'MLD2P4: Warning: original coarse solver was requested as ',& & mld_fact_names(coarse_solve_id) if (prec%precv(iszv)%parms%coarse_mat == mld_repl_mat_) then write(psb_err_unit,*) ' but I am building ',& & mld_fact_names(prec%precv(iszv)%sm%sv%get_id()) else if (prec%precv(iszv)%parms%coarse_mat == mld_distr_mat_) then write(psb_err_unit,*) ' but I am building BJAC with ',& & mld_fact_names(prec%precv(iszv)%sm%sv%get_id()) else write(psb_err_unit,*) ' but I am building ',& & mld_fact_names(prec%precv(iszv)%sm%sv%get_id()) end if write(psb_err_unit,*) 'This may happen if: ' write(psb_err_unit,*) ' 1. coarse_subsolve has been reset, or ' write(psb_err_unit,*) ' 2. the solver ', mld_fact_names(coarse_solve_id), & & ' was not configured at MLD2P4 build time, or' write(psb_err_unit,*) ' 3. an unsupported solver setup was specified.' end if if (prec%precv(iszv)%parms%coarse_mat /= mld_distr_mat_) then write(psb_err_unit,*) & & 'MLD2P4: Warning: original coarse solver was requested as ',& & mld_fact_names(coarse_solve_id),& & ' but the coarse matrix has been changed to replicated' end if case(mld_bjac_) if (prec%precv(iszv)%parms%coarse_mat /= mld_distr_mat_) then write(psb_err_unit,*) & & 'MLD2P4: Warning: original coarse solver was requested as ',& & mld_fact_names(coarse_solve_id),& & ' but the coarse matrix has been changed to replicated' end if case default ! We should never get here. info=psb_err_from_subroutine_ ch_err='unkn coarse_solve' call psb_errpush(info,name,a_err=ch_err) goto 9999 end select end if if (debug_level >= psb_debug_outer_) & & write(debug_unit,*) me,' ',trim(name),& & 'Exiting with',iszv,' levels' call psb_erractionrestore(err_act) return 9999 call psb_error_handler(err_act) return end subroutine mld_c_smoothers_bld