! ! ! 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_s_poly_smoother_apply_vect(alpha,sm,x,beta,y,desc_data,trans,& & sweeps,work,wv,info,init,initu) use psb_base_mod use amg_s_diag_solver use psb_base_linsolve_conv_mod, only : log_conv use amg_s_poly_smoother, amg_protect_name => amg_s_poly_smoother_apply_vect implicit none type(psb_desc_type), intent(in) :: desc_data class(amg_s_poly_smoother_type), intent(inout) :: sm type(psb_s_vect_type),intent(inout) :: x type(psb_s_vect_type),intent(inout) :: y real(psb_spk_),intent(in) :: alpha,beta character(len=1),intent(in) :: trans integer(psb_ipk_), intent(in) :: sweeps! this is ignored here, the polynomial degree dictates the value real(psb_spk_),target, intent(inout) :: work(:) type(psb_s_vect_type),intent(inout) :: wv(:) integer(psb_ipk_), intent(out) :: info character, intent(in), optional :: init type(psb_s_vect_type),intent(inout), optional :: initu ! Timers logical, parameter :: do_timings=.true. integer(psb_ipk_), save :: poly_1=-1, poly_2=-1, poly_3=-1 integer(psb_ipk_), save :: poly_mv=-1, poly_sv=-1, poly_vect=-1 ! integer(psb_ipk_) :: n_row,n_col type(psb_s_vect_type) :: tx, ty, tz, r real(psb_spk_), pointer :: aux(:) type(psb_ctxt_type) :: ctxt integer(psb_ipk_) :: np, me, i, err_act character :: trans_, init_ real(psb_spk_) :: res, resdenum 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 if ((do_timings).and.(poly_1==-1)) & & poly_1 = psb_get_timer_idx("POLY: Chebychev4") if ((do_timings).and.(poly_2==-1)) & & poly_2 = psb_get_timer_idx("POLY: OptChebychev4") if ((do_timings).and.(poly_3==-1)) & & poly_3 = psb_get_timer_idx("POLY: OptChebychev1") if ((do_timings).and.(poly_mv==-1)) & & poly_mv = psb_get_timer_idx("POLY: spMV") if ((do_timings).and.(poly_vect==-1)) & & poly_vect = psb_get_timer_idx("POLY: Vectors") if ((do_timings).and.(poly_sv==-1)) & & poly_sv = psb_get_timer_idx("POLY: solver") 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_spk_)') goto 9999 end if endif 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(sone,x,szero,r,desc_data,info) call tx%zero() call ty%zero() call tz%zero() select case(sm%variant) case(amg_cheb_4_) if (do_timings) call psb_tic(poly_1) block real(psb_spk_) :: cz, cr ! b == x ! x == tx ! do i=1, sm%pdegree-1 ! B r_{k-1} if (do_timings) call psb_tic(poly_sv) call sm%sv%apply(sone,r,szero,ty,desc_data,trans_,aux,wv(5:),info,init='Z') ! ty = M^{-1} r if (do_timings) call psb_toc(poly_sv) cz = (2*i*sone-3)/(2*i*sone+sone) cr = (8*i*sone-4)/((2*i*sone+sone)*sm%rho_ba) if (do_timings) call psb_tic(poly_vect) call psb_upd_xyz(cr,cz,sone,sone,ty,tz,tx,desc_data,info) ! zk = cz * zk-1 + cr * rk-1 if (do_timings) call psb_toc(poly_vect) if (do_timings) call psb_tic(poly_mv) call psb_spmm(-sone,sm%pa,tz,sone,r,desc_data,info,work=aux,trans=trans_) if (do_timings) call psb_toc(poly_mv) end do if (do_timings) call psb_tic(poly_sv) call sm%sv%apply(sone,r,szero,ty,desc_data,trans_,aux,wv(5:),info,init='Z') ! ty = M^{-1} r if (do_timings) call psb_toc(poly_sv) cz = (2*sm%pdegree*sone-3)/(2*sm%pdegree*sone+sone) cr = (8*sm%pdegree*sone-4)/((2*sm%pdegree*sone+sone)*sm%rho_ba) if (do_timings) call psb_tic(poly_vect) call psb_upd_xyz(cr,cz,sone,sone,ty,tz,tx,desc_data,info) if (do_timings) call psb_toc(poly_vect) end block if (do_timings) call psb_toc(poly_1) case(amg_cheb_4_opt_) if (do_timings) call psb_tic(poly_2) block real(psb_spk_) :: cz, cr ! b == x ! x == tx ! if (allocated(sm%poly_beta)) then if (size(sm%poly_beta) /= sm%pdegree) deallocate(sm%poly_beta) end if if (.not.allocated(sm%poly_beta)) then call psb_realloc(sm%pdegree,sm%poly_beta,info) sm%poly_beta(1:sm%pdegree) = amg_d_poly_beta_mat(1:sm%pdegree,sm%pdegree) end if do i=1, sm%pdegree-1 ! B r_{k-1} if (do_timings) call psb_tic(poly_sv) call sm%sv%apply(sone,r,szero,ty,desc_data,trans_,aux,wv(5:),info,init='Z') if (do_timings) call psb_toc(poly_sv) cz = (2*i*sone-3)/(2*i*sone+sone) cr = (8*i*sone-4)/((2*i*sone+sone)*sm%rho_ba) if (do_timings) call psb_tic(poly_vect) call psb_upd_xyz(cr,cz,sm%poly_beta(i),sone,ty,tz,tx,desc_data,info) if (do_timings) call psb_toc(poly_vect) if (do_timings) call psb_tic(poly_mv) call psb_spmm(-sone,sm%pa,tz,sone,r,desc_data,info,work=aux,trans=trans_) if (do_timings) call psb_toc(poly_mv) end do call sm%sv%apply(sone,r,szero,ty,desc_data,trans_,aux,wv(5:),info,init='Z') cz = (2*sm%pdegree*sone-3)/(2*sm%pdegree*sone+sone) cr = (8*sm%pdegree*sone-4)/((2*sm%pdegree*sone+sone)*sm%rho_ba) if (do_timings) call psb_tic(poly_vect) call psb_upd_xyz(cr,cz,sm%poly_beta(sm%pdegree),sone,ty,tz,tx,desc_data,info) if (do_timings) call psb_toc(poly_vect) end block if (do_timings) call psb_toc(poly_2) case(amg_cheb_1_opt_) if (do_timings) call psb_tic(poly_3) block real(psb_spk_) :: sigma, theta, delta, rho_old, rho ! b == x ! x == tx ! theta = (sone+sm%cf_a)/2 delta = (sone-sm%cf_a)/2 sigma = theta/delta rho_old = sone/sigma if (do_timings) call psb_tic(poly_sv) call sm%sv%apply(sone,r,szero,ty,desc_data,trans_,aux,wv(5:),info,init='Z') if (do_timings) call psb_toc(poly_sv) call psb_geaxpby((sone/sm%rho_ba),ty,szero,r,desc_data,info) if (do_timings) call psb_tic(poly_vect) call psb_upd_xyz((sone/theta),szero,sone,sone,r,tz,tx,desc_data,info) if (do_timings) call psb_toc(poly_vect) ! tz == d do i=1, sm%pdegree-1 ! ! ! r_{k-1} = r_k - (1/rho(BA)) B A d_k if (do_timings) call psb_tic(poly_mv) call psb_spmm(sone,sm%pa,tz,szero,ty,desc_data,info,work=aux,trans=trans_) if (do_timings) call psb_toc(poly_mv) if (do_timings) call psb_tic(poly_sv) call sm%sv%apply(-(sone/sm%rho_ba),ty,sone,r,desc_data,trans_,aux,wv(5:),info,init='Z') if (do_timings) call psb_toc(poly_sv) ! ! d_{k+1} = (rho rho_old) d_k + 2(rho/delta) r_{k+1} rho = sone/(2*sigma - rho_old) if (do_timings) call psb_tic(poly_vect) call psb_upd_xyz((2*rho/delta),(rho*rho_old),sone,sone,r,tz,tx,desc_data,info) if (do_timings) call psb_toc(poly_vect) rho_old = rho end do end block if (do_timings) call psb_toc(poly_3) case default info=psb_err_internal_error_ call psb_errpush(info,name,& & a_err='wrong polynomial variant') goto 9999 end select 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.(4*n_col <= size(work))) then deallocate(aux) endif call psb_erractionrestore(err_act) return 9999 call psb_error_handler(err_act) return end subroutine amg_s_poly_smoother_apply_vect