!!$ !!$ !!$ MD2P4 !!$ Multilevel Domain Decomposition Parallel Preconditioner Package for PSBLAS !!$ for !!$ Parallel Sparse BLAS v2.0 !!$ (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata !!$ Alfredo Buttari University of Rome Tor Vergata !!$ Daniela di Serafino Second University of Naples !!$ Pasqua D'Ambra ICAR-CNR !!$ !!$ 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 MD2P4 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 MD2P4 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 mld_dbjac_aply(alpha,prec,x,beta,y,desc_data,trans,work,info) ! ! Compute Y <- beta*Y + alpha*K^-1 X ! where K is a a Block Jacobi preconditioner stored in prec ! Note that desc_data may or may not be the same as prec%desc_data, ! but since both are INTENT(IN) this should be legal. ! use psb_base_mod use mld_prec_mod, mld_protect_name => mld_dbjac_aply implicit none type(psb_desc_type), intent(in) :: desc_data type(mld_dbaseprc_type), intent(in) :: prec real(kind(0.d0)),intent(inout) :: x(:), y(:) real(kind(0.d0)),intent(in) :: alpha,beta character(len=1) :: trans real(kind(0.d0)),target :: work(:) integer, intent(out) :: info ! Local variables integer :: n_row,n_col real(kind(1.d0)), pointer :: ww(:), aux(:), tx(:),ty(:),tb(:) character ::diagl, diagu integer :: ictxt,np,me,i, nrg, err_act, int_err(5) real(kind(1.d0)) :: t1, t2, t3, t4, t5, t6, t7 logical,parameter :: debug=.false., debugprt=.false. character(len=20) :: name, ch_err name='mld_dbjac_aply' info = 0 call psb_erractionsave(err_act) ictxt=psb_cd_get_context(desc_data) call psb_info(ictxt, me, np) select case(toupper(trans)) case('N') case('T','C') case default call psb_errpush(40,name) goto 9999 end select n_row = psb_cd_get_local_rows(desc_data) n_col = psb_cd_get_local_cols(desc_data) if (n_col <= size(work)) then ww => work(1:n_col) if ((4*n_col+n_col) <= size(work)) then aux => work(n_col+1:) else allocate(aux(4*n_col),stat=info) if (info /= 0) then info=4025 call psb_errpush(info,name,i_err=(/4*n_col,0,0,0,0/),& & a_err='real(kind(1.d0))') goto 9999 end if endif else allocate(ww(n_col),aux(4*n_col),stat=info) if (info /= 0) then info=4025 call psb_errpush(info,name,i_err=(/5*n_col,0,0,0,0/),& & a_err='real(kind(1.d0))') goto 9999 end if endif if (debug) then write(0,*) me,' BJAC_APLY: ',prec%iprcparm(sub_solve_),prec%iprcparm(smooth_sweeps_) end if if (prec%iprcparm(smooth_sweeps_) == 1) then select case(prec%iprcparm(sub_solve_)) case(ilu_n_,ilu_t_) select case(toupper(trans)) case('N') call psb_spsm(done,prec%av(l_pr_),x,dzero,ww,desc_data,info,& & trans='N',unit='L',diag=prec%d,choice=psb_none_,work=aux) if(info /=0) goto 9999 call psb_spsm(alpha,prec%av(u_pr_),ww,beta,y,desc_data,info,& & trans='N',unit='U',choice=psb_none_, work=aux) if(info /=0) goto 9999 case('T','C') call psb_spsm(done,prec%av(u_pr_),x,dzero,ww,desc_data,info,& & trans=trans,unit='L',diag=prec%d,choice=psb_none_,work=aux) if(info /=0) goto 9999 call psb_spsm(alpha,prec%av(l_pr_),ww,beta,y,desc_data,info,& & trans=trans,unit='U',choice=psb_none_,work=aux) if(info /=0) goto 9999 end select case(slu_) ww(1:n_row) = x(1:n_row) select case(toupper(trans)) case('N') call mld_dslu_solve(0,n_row,1,ww,n_row,prec%iprcparm(slu_ptr_),info) case('T','C') call mld_dslu_solve(1,n_row,1,ww,n_row,prec%iprcparm(slu_ptr_),info) end select if(info /=0) goto 9999 call psb_geaxpby(alpha,ww,beta,y,desc_data,info) case(sludist_) !!$ write(0,*) 'Calling SLUDist_solve ',n_row ww(1:n_row) = x(1:n_row) select case(toupper(trans)) case('N') call mld_dsludist_solve(0,n_row,1,ww,n_row,prec%iprcparm(slud_ptr_),info) case('T','C') call mld_dsludist_solve(1,n_row,1,ww,n_row,prec%iprcparm(slud_ptr_),info) end select if(info /=0) goto 9999 call psb_geaxpby(alpha,ww,beta,y,desc_data,info) case (umf_) select case(toupper(trans)) case('N') call mld_dumf_solve(0,n_row,ww,x,n_row,prec%iprcparm(umf_numptr_),info) case('T','C') call mld_dumf_solve(1,n_row,ww,x,n_row,prec%iprcparm(umf_numptr_),info) end select if(info /=0) goto 9999 call psb_geaxpby(alpha,ww,beta,y,desc_data,info) case default write(0,*) 'Unknown factorization type in bjac_aply',prec%iprcparm(sub_solve_) end select if (debugprt) write(0,*)' Y: ',y(:) else if (prec%iprcparm(smooth_sweeps_) > 1) then ! Note: we have to add TRANS to this one !!!!!!!!! if (size(prec%av) < ap_nd_) then info = 4011 goto 9999 endif allocate(tx(n_col),ty(n_col),stat=info) if (info /= 0) then info=4025 call psb_errpush(info,name,i_err=(/2*n_col,0,0,0,0/),& & a_err='real(kind(1.d0))') goto 9999 end if tx = dzero ty = dzero select case(prec%iprcparm(sub_solve_)) case(ilu_n_,ilu_t_) do i=1, prec%iprcparm(smooth_sweeps_) ! X(k+1) = M^-1*(b-N*X(k)) ty(1:n_row) = x(1:n_row) call psb_spmm(-done,prec%av(ap_nd_),tx,done,ty,& & prec%desc_data,info,work=aux) if(info /=0) goto 9999 call psb_spsm(done,prec%av(l_pr_),ty,dzero,ww,& & prec%desc_data,info,& & trans='N',unit='L',diag=prec%d,choice=psb_none_,work=aux) if(info /=0) goto 9999 call psb_spsm(done,prec%av(u_pr_),ww,dzero,tx,& & prec%desc_data,info,& & trans='N',unit='U',choice=psb_none_,work=aux) if(info /=0) goto 9999 end do case(sludist_) write(0,*) 'No sense in having SLUDist with JAC_SWEEPS >1' info=4010 goto 9999 case(slu_) do i=1, prec%iprcparm(smooth_sweeps_) ! X(k+1) = M^-1*(b-N*X(k)) ty(1:n_row) = x(1:n_row) call psb_spmm(-done,prec%av(ap_nd_),tx,done,ty,& & prec%desc_data,info,work=aux) if(info /=0) goto 9999 call mld_dslu_solve(0,n_row,1,ty,n_row,prec%iprcparm(slu_ptr_),info) if(info /=0) goto 9999 tx(1:n_row) = ty(1:n_row) end do case(umf_) do i=1, prec%iprcparm(smooth_sweeps_) ! X(k+1) = M^-1*(b-N*X(k)) ty(1:n_row) = x(1:n_row) call psb_spmm(-done,prec%av(ap_nd_),tx,done,ty,& & prec%desc_data,info,work=aux) if(info /=0) goto 9999 call mld_dumf_solve(0,n_row,ww,ty,n_row,& & prec%iprcparm(umf_numptr_),info) if(info /=0) goto 9999 tx(1:n_row) = ww(1:n_row) end do end select call psb_geaxpby(alpha,tx,beta,y,desc_data,info) deallocate(tx,ty) else info = 10 call psb_errpush(info,name,& & i_err=(/2,prec%iprcparm(smooth_sweeps_),0,0,0/)) goto 9999 endif if (n_col <= size(work)) then if ((4*n_col+n_col) <= size(work)) then else deallocate(aux) endif else deallocate(ww,aux) endif call psb_erractionrestore(err_act) return 9999 continue call psb_errpush(info,name,i_err=int_err,a_err=ch_err) call psb_erractionrestore(err_act) if (err_act.eq.psb_act_abort_) then call psb_error() return end if return end subroutine mld_dbjac_aply