! ! ! AMG4PSBLAS version 1.0 ! Algebraic Multigrid Package ! based on PSBLAS (Parallel Sparse BLAS version 3.7) ! ! (C) Copyright 2021 ! ! Salvatore Filippone ! Pasqua D'Ambra ! Daniela di Serafino ! ! 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. ! ! subroutine amg_d_poly_smoother_apply_vect(alpha,sm,x,beta,y,desc_data,trans,& & sweeps,work,wv,info,init,initu) use psb_base_mod use amg_d_diag_solver use psb_base_krylov_conv_mod, only : log_conv use amg_d_poly_smoother, amg_protect_name => amg_d_poly_smoother_apply_vect implicit none type(psb_desc_type), intent(in) :: desc_data class(amg_d_poly_smoother_type), intent(inout) :: sm type(psb_d_vect_type),intent(inout) :: x type(psb_d_vect_type),intent(inout) :: y real(psb_dpk_),intent(in) :: alpha,beta character(len=1),intent(in) :: trans integer(psb_ipk_), intent(in) :: sweeps real(psb_dpk_),target, intent(inout) :: work(:) type(psb_d_vect_type),intent(inout) :: wv(:) integer(psb_ipk_), intent(out) :: info character, intent(in), optional :: init type(psb_d_vect_type),intent(inout), optional :: initu ! integer(psb_ipk_) :: n_row,n_col type(psb_d_vect_type) :: tx, ty, tz, r real(psb_dpk_), pointer :: aux(:) type(psb_ctxt_type) :: ctxt integer(psb_ipk_) :: np, me, i, err_act character :: trans_, init_ real(psb_dpk_) :: res, resdenum real(psb_dpk_) :: cz, cr character(len=20) :: name='d_poly_smoother_apply_v' call psb_erractionsave(err_act) info = psb_success_ ctxt = desc_data%get_context() call psb_info(ctxt,me,np) if (present(init)) then init_ = psb_toupper(init) else init_='Z' end if trans_ = psb_toupper(trans) select case(trans_) case('N') case('T','C') case default call psb_errpush(psb_err_iarg_invalid_i_,name) goto 9999 end select if (.not.allocated(sm%sv)) then info = 1121 call psb_errpush(info,name) goto 9999 end if n_row = desc_data%get_local_rows() n_col = desc_data%get_local_cols() if (4*n_col <= size(work)) then aux => work(:) else allocate(aux(4*n_col),stat=info) if (info /= psb_success_) then info=psb_err_alloc_request_ call psb_errpush(info,name,& & i_err=(/4*n_col,izero,izero,izero,izero/),& & a_err='real(psb_dpk_)') goto 9999 end if endif !!$ if (me == 0) write(0,*) name,' Unimplemented apply_vect ' !!$ info =psb_err_internal_error_ !!$ call psb_errpush(info,& !!$ & name,a_err='Error in sub_aply Polynomial not implemented') !!$ goto 9999 if (size(wv) < 4) then info = psb_err_internal_error_ call psb_errpush(info,name,& & a_err='invalid wv size in smoother_apply') goto 9999 end if associate(tx => wv(1), ty => wv(2), tz => wv(3), r => wv(4)) call psb_geaxpby(done,x,dzero,r,desc_data,info) call tx%zero() call ty%zero() call tz%zero() do i=1, sm%pdegree call sm%sv%apply(done,r,dzero,ty,desc_data,trans_,aux,wv(5:),info,init='Y') cz = (2*i*done-3)/(2*i*done+done) cr = (8*i*done-4)/((2*i*done+done)*sm%rho_ba) call psb_geaxpby(cr,ty,cz,tz,desc_data,info) call psb_geaxpby(sm%poly_beta(i),tz,done,tx,desc_data,info) call psb_spmm(-done,sm%pa,tz,done,r,desc_data,info,work=aux,trans=trans_) end do if (info == psb_success_) call psb_geaxpby(alpha,tx,beta,y,desc_data,info) if (info /= psb_success_) then info=psb_err_internal_error_ call psb_errpush(info,name,& & a_err='polynomial smoother') goto 9999 end if end associate !!$ if ((.not.sm%sv%is_iterative()).and.((sweeps == 1).or.(sm%nd_nnz_tot==0))) then !!$ ! if .not.sv%is_iterative, there's no need to pass init !!$ call sm%sv%apply(alpha,x,beta,y,desc_data,trans_,aux,wv,info) !!$ !!$ if (info /= psb_success_) then !!$ call psb_errpush(psb_err_internal_error_,& !!$ & name,a_err='Error in sub_aply Jacobi Sweeps = 1') !!$ goto 9999 !!$ endif !!$ !!$ else if (sweeps >= 0) then !!$ select type (smsv => sm%sv) !!$ class is (amg_d_diag_solver_type) !!$ ! !!$ ! This means we are dealing with a pure Jacobi smoother/solver. !!$ ! !!$ associate(tx => wv(1), ty => wv(2)) !!$ select case (init_) !!$ case('Z') !!$ !!$ call sm%sv%apply(done,x,dzero,ty,desc_data,trans_,aux,wv(3:),info,init='Z') !!$ !!$ case('Y') !!$ call psb_geaxpby(done,x,dzero,tx,desc_data,info) !!$ call psb_geaxpby(done,y,dzero,ty,desc_data,info) !!$ call psb_spmm(-done,sm%pa,ty,done,tx,desc_data,info,work=aux,trans=trans_) !!$ call sm%sv%apply(done,tx,dzero,ty,desc_data,trans_,aux,wv(3:),info,init='Y') !!$ !!$ case('U') !!$ if (.not.present(initu)) then !!$ call psb_errpush(psb_err_internal_error_,name,& !!$ & a_err='missing initu to smoother_apply') !!$ goto 9999 !!$ end if !!$ call psb_geaxpby(done,x,dzero,tx,desc_data,info) !!$ call psb_geaxpby(done,initu,dzero,ty,desc_data,info) !!$ call psb_spmm(-done,sm%pa,ty,done,tx,desc_data,info,work=aux,trans=trans_) !!$ call sm%sv%apply(done,tx,dzero,ty,desc_data,trans_,aux,wv(3:),info,init='Y') !!$ !!$ case default !!$ call psb_errpush(psb_err_internal_error_,name,& !!$ & a_err='wrong init to smoother_apply') !!$ goto 9999 !!$ end select !!$ !!$ do i=1, sweeps-1 !!$ ! !!$ ! Compute Y(j+1) = Y(j)+ D^(-1)*(X-A*Y(j)), !!$ ! where is the diagonal and A the matrix. !!$ ! !!$ call psb_geaxpby(done,x,dzero,tx,desc_data,info) !!$ call psb_spmm(-done,sm%pa,ty,done,tx,desc_data,info,work=aux,trans=trans_) !!$ !!$ if (info /= psb_success_) exit !!$ !!$ call sm%sv%apply(done,tx,done,ty,desc_data,trans_,aux,wv(3:),info,init='Y') !!$ !!$ if (info /= psb_success_) exit !!$ !!$ if ( sm%checkres.and.(mod(i,sm%checkiter) == 0) ) then !!$ call psb_geaxpby(done,x,dzero,r,r,desc_data,info) !!$ call psb_spmm(-done,sm%pa,ty,done,r,desc_data,info) !!$ res = psb_genrm2(r,desc_data,info) !!$ if( sm%printres ) then !!$ call log_conv("BJAC",me,i,sm%printiter,res,resdenum,sm%tol) !!$ end if !!$ if ( res < sm%tol*resdenum ) then !!$ if( (sm%printres).and.(mod(sm%printiter,sm%checkiter)/=0) ) & !!$ & call log_conv("BJAC",me,i,1,res,resdenum,sm%tol) !!$ exit !!$ end if !!$ end if !!$ !!$ end do !!$ !!$ !!$ if (info == psb_success_) call psb_geaxpby(alpha,ty,beta,y,desc_data,info) !!$ !!$ if (info /= psb_success_) then !!$ info=psb_err_internal_error_ !!$ call psb_errpush(info,name,& !!$ & a_err='subsolve with Jacobi sweeps > 1') !!$ goto 9999 !!$ end if !!$ !!$ !!$ end associate !!$ !!$ class default !!$ ! !!$ ! !!$ ! Apply multiple sweeps of a block-Jacobi solver !!$ ! to compute an approximate solution of a linear system. !!$ ! !!$ ! !!$ if (size(wv) < 2) then !!$ info = psb_err_internal_error_ !!$ call psb_errpush(info,name,& !!$ & a_err='invalid wv size in smoother_apply') !!$ goto 9999 !!$ end if !!$ associate(tx => wv(1), ty => wv(2)) !!$ !!$ ! !!$ ! Unroll the first iteration and fold it inside SELECT CASE !!$ ! this will save one AXPBY and one SPMM when INIT=Z, and will be !!$ ! significant when sweeps=1 (a common case) !!$ ! !!$ select case (init_) !!$ case('Z') !!$ !!$ call sm%sv%apply(done,x,dzero,ty,desc_data,trans_,aux,wv(3:),info,init='Z') !!$ !!$ case('Y') !!$ call psb_geaxpby(done,x,dzero,tx,desc_data,info) !!$ call psb_geaxpby(done,y,dzero,ty,desc_data,info) !!$ call psb_spmm(-done,sm%nd,ty,done,tx,desc_data,info,work=aux,trans=trans_) !!$ call sm%sv%apply(done,tx,dzero,ty,desc_data,trans_,aux,wv(3:),info,init='Y') !!$ !!$ case('U') !!$ if (.not.present(initu)) then !!$ call psb_errpush(psb_err_internal_error_,name,& !!$ & a_err='missing initu to smoother_apply') !!$ goto 9999 !!$ end if !!$ call psb_geaxpby(done,x,dzero,tx,desc_data,info) !!$ call psb_geaxpby(done,initu,dzero,ty,desc_data,info) !!$ call psb_spmm(-done,sm%nd,ty,done,tx,desc_data,info,work=aux,trans=trans_) !!$ call sm%sv%apply(done,tx,dzero,ty,desc_data,trans_,aux,wv(3:),info,init='Y') !!$ !!$ case default !!$ call psb_errpush(psb_err_internal_error_,name,& !!$ & a_err='wrong init to smoother_apply') !!$ goto 9999 !!$ end select !!$ !!$ do i=1, sweeps-1 !!$ ! !!$ ! Compute Y(j+1) = D^(-1)*(X-ND*Y(j)), where D and ND are the !!$ ! block diagonal part and the remaining part of the local matrix !!$ ! and Y(j) is the approximate solution at sweep j. !!$ ! !!$ call psb_geaxpby(done,x,dzero,tx,desc_data,info) !!$ call psb_spmm(-done,sm%nd,ty,done,tx,desc_data,info,work=aux,trans=trans_) !!$ !!$ if (info /= psb_success_) exit !!$ !!$ call sm%sv%apply(done,tx,dzero,ty,desc_data,trans_,aux,wv(3:),info,init='Y') !!$ !!$ if (info /= psb_success_) exit !!$ !!$ if ( sm%checkres.and.(mod(i,sm%checkiter) == 0) ) then !!$ call psb_geaxpby(done,x,dzero,r,r,desc_data,info) !!$ call psb_spmm(-done,sm%pa,ty,done,r,desc_data,info) !!$ res = psb_genrm2(r,desc_data,info) !!$ if( sm%printres ) then !!$ call log_conv("BJAC",me,i,sm%printiter,res,resdenum,sm%tol) !!$ end if !!$ if (res < sm%tol*resdenum ) then !!$ if( (sm%printres).and.( mod(sm%printiter,sm%checkiter) /=0 ) ) & !!$ & call log_conv("BJAC",me,i,1,res,resdenum,sm%tol) !!$ exit !!$ end if !!$ end if !!$ !!$ end do !!$ !!$ if (info == psb_success_) call psb_geaxpby(alpha,ty,beta,y,desc_data,info) !!$ !!$ if (info /= psb_success_) then !!$ info=psb_err_internal_error_ !!$ call psb_errpush(info,name,& !!$ & a_err='subsolve with Jacobi sweeps > 1') !!$ goto 9999 !!$ end if !!$ !!$ end associate !!$ end select !!$ !!$ else !!$ !!$ info = psb_err_iarg_neg_ !!$ call psb_errpush(info,name,& !!$ & i_err=(/itwo,sweeps,izero,izero,izero/)) !!$ goto 9999 !!$ !!$ endif !!$ if (.not.(4*n_col <= size(work))) then deallocate(aux) endif !!$ if(sm%checkres) then !!$ call psb_gefree(r,desc_data,info) !!$ end if call psb_erractionrestore(err_act) return 9999 call psb_error_handler(err_act) return end subroutine amg_d_poly_smoother_apply_vect