!!$ !!$ !!$ 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 psb_dbaseprc_aply(alpha,prec,x,beta,y,desc_data,trans,work,info) ! ! Compute Y <- beta*Y + alpha*K^-1 X ! where K is a a basic preconditioner stored in prec ! use psb_base_mod use psb_prec_type implicit none type(psb_desc_type),intent(in) :: desc_data type(psb_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, int_err(5) real(kind(1.d0)), pointer :: ww(:), aux(:), tx(:),ty(:) character ::diagl, diagu integer :: ictxt,np,me,i, isz, nrg, err_act real(kind(1.d0)) :: t1, t2, t3, t4, t5, t6, t7 logical,parameter :: debug=.false., debugprt=.false. character(len=20) :: name, ch_err interface psb_bjac_aply subroutine psb_dbjac_aply(alpha,prec,x,beta,y,desc_data,trans,work,info) use psb_base_mod use psb_prec_type type(psb_desc_type), intent(in) :: desc_data type(psb_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 end subroutine psb_dbjac_aply end interface name='psb_dbaseprc_aply' info = 0 call psb_erractionsave(err_act) ictxt=desc_data%matrix_data(psb_ctxt_) call psb_info(ictxt, me, np) diagl='U' diagu='U' select case(trans) case('N','n') case('T','t','C','c') case default info=40 int_err(1)=6 ch_err(2:2)=trans goto 9999 end select select case(prec%iprcparm(p_type_)) case(noprec_) call psb_geaxpby(alpha,x,beta,y,desc_data,info) case(diag_) if (size(work) >= size(x)) then ww => work else allocate(ww(size(x)),stat=info) if (info /= 0) then call psb_errpush(4010,name,a_err='Allocate') goto 9999 end if end if n_row=desc_data%matrix_data(psb_n_row_) ww(1:n_row) = x(1:n_row)*prec%d(1:n_row) call psb_geaxpby(alpha,ww,beta,y,desc_data,info) if (size(work) < size(x)) then deallocate(ww,stat=info) if (info /= 0) then call psb_errpush(4010,name,a_err='Deallocate') goto 9999 end if end if case(bjac_) call psb_bjac_aply(alpha,prec,x,beta,y,desc_data,trans,work,info) if(info.ne.0) then info=4010 ch_err='psb_bjac_aply' goto 9999 end if case(asm_,ras_,ash_,rash_) if (prec%iprcparm(n_ovr_)==0) then ! shortcut: this fixes performance for RAS(0) == BJA call psb_bjac_aply(alpha,prec,x,beta,y,desc_data,trans,work,info) if(info.ne.0) then info=4010 ch_err='psb_bjacaply' goto 9999 end if else ! Note: currently trans is unused. n_row=prec%desc_data%matrix_data(psb_n_row_) n_col=prec%desc_data%matrix_data(psb_n_col_) isz=max(n_row,N_COL) if ((6*isz) <= size(work)) then ww => work(1:isz) tx => work(isz+1:2*isz) ty => work(2*isz+1:3*isz) aux => work(3*isz+1:) else if ((4*isz) <= size(work)) then aux => work(1:) allocate(ww(isz),tx(isz),ty(isz),stat=info) if (info /= 0) then call psb_errpush(4010,name,a_err='Allocate') goto 9999 end if else if ((3*isz) <= size(work)) then ww => work(1:isz) tx => work(isz+1:2*isz) ty => work(2*isz+1:3*isz) allocate(aux(4*isz),stat=info) if (info /= 0) then call psb_errpush(4010,name,a_err='Allocate') goto 9999 end if else allocate(ww(isz),tx(isz),ty(isz),& &aux(4*isz),stat=info) if (info /= 0) then call psb_errpush(4010,name,a_err='Allocate') goto 9999 end if endif if (debugprt) write(0,*)' vdiag: ',prec%d(:) if (debug) write(0,*) 'Bi-CGSTAB with Additive Schwarz prec' tx(1:desc_data%matrix_data(psb_n_row_)) = x(1:desc_data%matrix_data(psb_n_row_)) tx(desc_data%matrix_data(psb_n_row_)+1:isz) = dzero if (prec%iprcparm(restr_)==psb_halo_) then call psb_halo(tx,prec%desc_data,info,work=aux,data=psb_comm_ext_) if(info /=0) then info=4010 ch_err='psb_halo' goto 9999 end if else if (prec%iprcparm(restr_) /= psb_none_) then write(0,*) 'Problem in PRC_APLY: Unknown value for restriction ',& &prec%iprcparm(restr_) end if if (prec%iprcparm(iren_)>0) then call dgelp('N',n_row,1,prec%perm,tx,isz,ww,isz,info) if(info /=0) then info=4010 ch_err='psb_dgelp' goto 9999 end if endif call psb_bjac_aply(done,prec,tx,dzero,ty,prec%desc_data,trans,aux,info) if(info.ne.0) then info=4010 ch_err='psb_bjac_aply' goto 9999 end if if (prec%iprcparm(iren_)>0) then call dgelp('N',n_row,1,prec%invperm,ty,isz,ww,isz,info) if(info /=0) then info=4010 ch_err='psb_dgelp' goto 9999 end if endif select case (prec%iprcparm(prol_)) case(psb_none_) ! Would work anyway, but since it's supposed to do nothing... ! call f90_psovrl(ty,prec%desc_data,update=prec%a_restrict) case(psb_sum_,psb_avg_) call psb_ovrl(ty,prec%desc_data,info,& & update=prec%iprcparm(prol_),work=aux) if(info /=0) then info=4010 ch_err='psb_ovrl' goto 9999 end if case default write(0,*) 'Problem in PRC_APLY: Unknown value for prolongation ',& & prec%iprcparm(prol_) end select call psb_geaxpby(alpha,ty,beta,y,desc_data,info) if ((6*isz) <= size(work)) then else if ((4*isz) <= size(work)) then deallocate(ww,tx,ty) else if ((3*isz) <= size(work)) then deallocate(aux) else deallocate(ww,aux,tx,ty) endif end if case default write(0,*) 'Invalid PRE%PREC ',prec%iprcparm(p_type_),':',& & min_prec_,noprec_,diag_,bjac_,& & ras_,asm_,ash_,rash_ end select 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 psb_dbaseprc_aply