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!!$
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!!$
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!!$ MD2P4
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!!$ Multilevel Domain Decomposition Parallel Preconditioner Package for PSBLAS
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!!$ for
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!!$ Parallel Sparse BLAS v2.0
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!!$ (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata
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!!$ Alfredo Buttari University of Rome Tor Vergata
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!!$ Daniela di Serafino Second University of Naples
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!!$ Pasqua D'Ambra ICAR-CNR
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!!$
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!!$ Redistribution and use in source and binary forms, with or without
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!!$ modification, are permitted provided that the following conditions
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!!$ are met:
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!!$ 1. Redistributions of source code must retain the above copyright
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!!$ notice, this list of conditions and the following disclaimer.
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!!$ 2. Redistributions in binary form must reproduce the above copyright
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!!$ notice, this list of conditions, and the following disclaimer in the
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!!$ documentation and/or other materials provided with the distribution.
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!!$ 3. The name of the MD2P4 group or the names of its contributors may
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!!$ not be used to endorse or promote products derived from this
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!!$ software without specific written permission.
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!!$
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!!$ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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!!$ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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!!$ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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!!$ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE MD2P4 GROUP OR ITS CONTRIBUTORS
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!!$ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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!!$ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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!!$ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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!!$ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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!!$ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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!!$ POSSIBILITY OF SUCH DAMAGE.
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!!$
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!!$
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subroutine psb_dbjac_aply(alpha,prec,x,beta,y,desc_data,trans,work,info)
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!
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! Compute Y <- beta*Y + alpha*K^-1 X
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! where K is a a Block Jacobi preconditioner stored in prec
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! Note that desc_data may or may not be the same as prec%desc_data,
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! but since both are INTENT(IN) this should be legal.
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!
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use psb_base_mod
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use psb_prec_type
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implicit none
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type(psb_desc_type), intent(in) :: desc_data
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type(psb_dbaseprc_type), intent(in) :: prec
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real(kind(0.d0)),intent(inout) :: x(:), y(:)
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real(kind(0.d0)),intent(in) :: alpha,beta
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character(len=1) :: trans
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real(kind(0.d0)),target :: work(:)
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integer, intent(out) :: info
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! Local variables
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integer :: n_row,n_col
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real(kind(1.d0)), pointer :: ww(:), aux(:), tx(:),ty(:),tb(:)
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character ::diagl, diagu
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integer :: ictxt,np,me,i, nrg, err_act, int_err(5)
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real(kind(1.d0)) :: t1, t2, t3, t4, t5, t6, t7, mpi_wtime
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logical,parameter :: debug=.false., debugprt=.false.
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external mpi_wtime
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character(len=20) :: name, ch_err
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name='psb_bjac_aply'
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info = 0
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call psb_erractionsave(err_act)
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ictxt=psb_cd_get_context(desc_data)
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call psb_info(ictxt, me, np)
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diagl='U'
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diagu='U'
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select case(trans)
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case('N','n')
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case('T','t','C','c')
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case default
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call psb_errpush(40,name)
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goto 9999
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end select
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n_row=desc_data%matrix_data(psb_n_row_)
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n_col=desc_data%matrix_data(psb_n_col_)
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if (n_col <= size(work)) then
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ww => work(1:n_col)
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if ((4*n_col+n_col) <= size(work)) then
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aux => work(n_col+1:)
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else
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allocate(aux(4*n_col),stat=info)
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if (info /= 0) then
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call psb_errpush(4010,name,a_err='Allocate')
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goto 9999
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end if
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endif
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else
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allocate(ww(n_col),aux(4*n_col),stat=info)
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if (info /= 0) then
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call psb_errpush(4010,name,a_err='Allocate')
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goto 9999
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end if
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endif
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if (prec%iprcparm(jac_sweeps_) == 1) then
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select case(prec%iprcparm(f_type_))
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case(f_ilu_n_,f_ilu_e_)
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select case(trans)
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case('N','n')
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call psb_spsm(done,prec%av(l_pr_),x,dzero,ww,desc_data,info,&
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& trans='N',unit=diagl,choice=psb_none_,work=aux)
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if(info /=0) goto 9999
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ww(1:n_row) = ww(1:n_row)*prec%d(1:n_row)
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call psb_spsm(alpha,prec%av(u_pr_),ww,beta,y,desc_data,info,&
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& trans='N',unit=diagu,choice=psb_none_, work=aux)
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if(info /=0) goto 9999
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case('T','t','C','c')
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call psb_spsm(done,prec%av(u_pr_),x,dzero,ww,desc_data,info,&
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& trans=trans,unit=diagu,choice=psb_none_, work=aux)
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if(info /=0) goto 9999
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ww(1:n_row) = ww(1:n_row)*prec%d(1:n_row)
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call psb_spsm(alpha,prec%av(l_pr_),ww,beta,y,desc_data,info,&
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& trans=trans,unit=diagl,choice=psb_none_,work=aux)
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if(info /=0) goto 9999
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end select
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case(f_slu_)
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ww(1:n_row) = x(1:n_row)
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select case(trans)
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case('N','n')
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call psb_dslu_solve(0,n_row,1,ww,n_row,prec%iprcparm(slu_ptr_),info)
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case('T','t','C','c')
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call psb_dslu_solve(1,n_row,1,ww,n_row,prec%iprcparm(slu_ptr_),info)
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end select
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if(info /=0) goto 9999
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call psb_geaxpby(alpha,ww,beta,y,desc_data,info)
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case (f_umf_)
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select case(trans)
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case('N','n')
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call psb_dumf_solve(0,n_row,ww,x,n_row,prec%iprcparm(umf_numptr_),info)
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case('T','t','C','c')
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call psb_dumf_solve(1,n_row,ww,x,n_row,prec%iprcparm(umf_numptr_),info)
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end select
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if(info /=0) goto 9999
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call psb_geaxpby(alpha,ww,beta,y,desc_data,info)
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case default
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write(0,*) 'Unknown factorization type in bjac_aply',prec%iprcparm(f_type_)
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end select
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if (debugprt) write(0,*)' Y: ',y(:)
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else if (prec%iprcparm(jac_sweeps_) > 1) then
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! Note: we have to add TRANS to this one !!!!!!!!!
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if (size(prec%av) < ap_nd_) then
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info = 4011
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goto 9999
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endif
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allocate(tx(n_col),ty(n_col),stat=info)
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if (info /= 0) then
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call psb_errpush(4010,name,a_err='Allocate')
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goto 9999
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end if
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tx = dzero
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ty = dzero
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select case(prec%iprcparm(f_type_))
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case(f_ilu_n_,f_ilu_e_)
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do i=1, prec%iprcparm(jac_sweeps_)
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! X(k+1) = M^-1*(b-N*X(k))
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ty(1:n_row) = x(1:n_row)
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call psb_spmm(-done,prec%av(ap_nd_),tx,done,ty,&
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& prec%desc_data,info,work=aux)
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if(info /=0) goto 9999
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call psb_spsm(done,prec%av(l_pr_),ty,dzero,ww,&
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& prec%desc_data,info,&
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& trans='N',unit='U',choice=psb_none_,work=aux)
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if(info /=0) goto 9999
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ww(1:n_row) = ww(1:n_row)*prec%d(1:n_row)
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call psb_spsm(done,prec%av(u_pr_),ww,dzero,tx,&
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& prec%desc_data,info,&
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& trans='N',unit='U',choice=psb_none_,work=aux)
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if(info /=0) goto 9999
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end do
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case(f_slu_)
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do i=1, prec%iprcparm(jac_sweeps_)
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! X(k+1) = M^-1*(b-N*X(k))
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ty(1:n_row) = x(1:n_row)
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call psb_spmm(-done,prec%av(ap_nd_),tx,done,ty,&
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& prec%desc_data,info,work=aux)
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if(info /=0) goto 9999
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call psb_dslu_solve(0,n_row,1,ty,n_row,prec%iprcparm(slu_ptr_),info)
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if(info /=0) goto 9999
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tx(1:n_row) = ty(1:n_row)
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end do
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case(f_umf_)
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do i=1, prec%iprcparm(jac_sweeps_)
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! X(k+1) = M^-1*(b-N*X(k))
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ty(1:n_row) = x(1:n_row)
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call psb_spmm(-done,prec%av(ap_nd_),tx,done,ty,&
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& prec%desc_data,info,work=aux)
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if(info /=0) goto 9999
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call psb_dumf_solve(0,n_row,ww,ty,n_row,&
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& prec%iprcparm(umf_numptr_),info)
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if(info /=0) goto 9999
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tx(1:n_row) = ww(1:n_row)
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end do
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end select
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call psb_geaxpby(alpha,tx,beta,y,desc_data,info)
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deallocate(tx,ty)
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else
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goto 9999
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endif
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if (n_col <= size(work)) then
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if ((4*n_col+n_col) <= size(work)) then
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else
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deallocate(aux)
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endif
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else
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deallocate(ww,aux)
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endif
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_errpush(info,name,i_err=int_err,a_err=ch_err)
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call psb_erractionrestore(err_act)
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if (err_act.eq.psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine psb_dbjac_aply
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