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amg4psblas/psb_dsp_renum.f90

459 lines
12 KiB
Fortran
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!!$
!!$
!!$ 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_dsp_renum(a,desc_a,blck,p,atmp,info)
use psb_base_mod
use psb_prec_type
implicit none
! .. array Arguments ..
type(psb_dspmat_type), intent(in) :: a,blck
type(psb_dspmat_type), intent(inout) :: atmp
type(psb_dbaseprc_type), intent(inout) :: p
type(psb_desc_type), intent(in) :: desc_a
integer, intent(out) :: info
character(len=20) :: name, ch_err
integer nztota, nztotb, nztmp, nzl, nnr, ir, mglob, mtype, n_row, &
& nrow_a,n_col, nhalo,lovr, ind, iind, pi,nr,ns,i,j,jj,k,kk
integer ::ictxt,np,me, err_act
integer, allocatable :: itmp(:), itmp2(:)
real(kind(1.d0)), allocatable :: rtmp(:)
real(kind(1.d0)) :: t1,t2,t3,t4,t5,t6, t7, t8
if (psb_get_errstatus().ne.0) return
info=0
name='apply_renum'
call psb_erractionsave(err_act)
ictxt=psb_cd_get_context(desc_a)
call psb_info(ictxt, me, np)
!!!!!!!!!!!!!!!! CHANGE FOR NON-CSR A
!
! Renumbering type:
! 1. Global column indices
! (2. GPS band reduction disabled for the time being)
if (p%iprcparm(iren_)==renum_glb_) then
atmp%m = a%m + blck%m
atmp%k = a%k
atmp%fida='CSR'
atmp%descra = 'GUN'
! This is the renumbering coherent with global indices..
mglob = psb_cd_get_global_rows(desc_a)
!
! Remember: we have switched IA1=COLS and IA2=ROWS
! Now identify the set of distinct local column indices
!
nnr = p%desc_data%matrix_data(psb_n_row_)
allocate(p%perm(nnr),p%invperm(nnr),itmp2(nnr),stat=info)
if (info /= 0) then
call psb_errpush(4010,name,a_err='Allocate')
goto 9999
end if
do k=1,nnr
itmp2(k) = p%desc_data%loc_to_glob(k)
enddo
!
! We want: NEW(I) = OLD(PERM(I))
!
call psb_msort(itmp2(1:nnr),ix=p%perm)
do k=1, nnr
p%invperm(p%perm(k)) = k
enddo
t3 = psb_wtime()
! Build ATMP with new numbering.
nztmp=size(atmp%aspk)
allocate(itmp(max(8,atmp%m+2,nztmp+2)),rtmp(atmp%m),stat=info)
if (info /= 0) then
call psb_errpush(4010,name,a_err='Allocate')
goto 9999
end if
j = 1
atmp%ia2(1) = 1
do i=1, atmp%m
ir = p%perm(i)
if (ir <= a%m ) then
nzl = a%ia2(ir+1) - a%ia2(ir)
if (nzl > size(rtmp)) then
call psb_realloc(nzl,rtmp,info)
if(info/=0) then
info=4010
ch_err='psb_realloc'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
endif
jj = a%ia2(ir)
k=0
do kk=1, nzl
if (a%ia1(jj+kk-1)<=atmp%m) then
k = k + 1
rtmp(k) = a%aspk(jj+kk-1)
atmp%ia1(j+k-1) = p%invperm(a%ia1(jj+kk-1))
endif
enddo
call psb_msort(atmp%ia1(j:j+k-1),ix=itmp2)
do kk=1,k
atmp%aspk(j+kk-1) = rtmp(itmp2(kk))
enddo
else if (ir <= atmp%m ) then
ir = ir - a%m
nzl = blck%ia2(ir+1) - blck%ia2(ir)
if (nzl > size(rtmp)) then
call psb_realloc(nzl,rtmp,info)
if(info/=0) then
info=4010
ch_err='psb_realloc'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
endif
jj = blck%ia2(ir)
k=0
do kk=1, nzl
if (blck%ia1(jj+kk-1)<=atmp%m) then
k = k + 1
rtmp(k) = blck%aspk(jj+kk-1)
atmp%ia1(j+k-1) = p%invperm(blck%ia1(jj+kk-1))
endif
enddo
call psb_msort(atmp%ia1(j:j+k-1),ix=itmp2)
do kk=1,k
atmp%aspk(j+kk-1) = rtmp(itmp2(kk))
enddo
else
write(0,*) 'Row index error 1 :',i,ir
endif
j = j + k
atmp%ia2(i+1) = j
enddo
t4 = psb_wtime()
deallocate(itmp,itmp2,rtmp)
else if (p%iprcparm(iren_)==renum_gps_) then
atmp%m = a%m + blck%m
atmp%k = a%k
atmp%fida='CSR'
atmp%descra = 'GUN'
do i=1, a%m
atmp%ia2(i) = a%ia2(i)
do j= a%ia2(i), a%ia2(i+1)-1
atmp%ia1(j) = a%ia1(j)
enddo
enddo
atmp%ia2(a%m+1) = a%ia2(a%m+1)
nztota = atmp%ia2(a%m+1) -1
if (blck%m>0) then
do i=1, blck%m
atmp%ia2(a%m+i) = nztota+blck%ia2(i)
do j= blck%ia2(i), blck%ia2(i+1)-1
atmp%ia1(nztota+j) = blck%ia1(j)
enddo
enddo
atmp%ia2(atmp%m+1) = nztota+blck%ia2(blck%m+1)
endif
nztmp = atmp%ia2(atmp%m+1) - 1
! This is a renumbering with Gibbs-Poole-Stockmeyer
! band reduction. Switched off for now. To be fixed,
! gps_reduction should get p%perm.
! write(0,*) me,' Renumbering: realloc perms',atmp%m
call psb_realloc(atmp%m,p%perm,info)
if(info/=0) then
info=4010
ch_err='psb_realloc'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
call psb_realloc(atmp%m,p%invperm,info)
if(info/=0) then
info=4010
ch_err='psb_realloc'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
allocate(itmp(max(8,atmp%m+2,nztmp+2)),stat=info)
if (info /= 0) then
call psb_errpush(4010,name,a_err='Allocate')
goto 9999
end if
itmp(1:8) = 0
! write(0,*) me,' Renumbering: Calling Metis'
! write(0,*) size(p%av(u_pr_)%pl),size(p%av(l_pr_)%pr)
call gps_reduction(atmp%m,atmp%ia2,atmp%ia1,p%perm,p%invperm,info)
if(info/=0) then
info=4010
ch_err='gps_reduction'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
! write(0,*) me,' Renumbering: Done GPS'
! call psb_barrier(ictxt)
do i=1, atmp%m
if (p%perm(i) /= i) then
write(0,*) me,' permutation is not identity '
exit
endif
enddo
do k=1, nnr
p%invperm(p%perm(k)) = k
enddo
t3 = psb_wtime()
! Build ATMP with new numbering.
allocate(itmp2(max(8,atmp%m+2,nztmp+2)),rtmp(atmp%m),stat=info)
if (info /= 0) then
call psb_errpush(4010,name,a_err='Allocate')
goto 9999
end if
j = 1
atmp%ia2(1) = 1
do i=1, atmp%m
ir = p%perm(i)
if (ir <= a%m ) then
nzl = a%ia2(ir+1) - a%ia2(ir)
if (nzl > size(rtmp)) then
call psb_realloc(nzl,rtmp,info)
if(info/=0) then
info=4010
ch_err='psb_realloc'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
endif
jj = a%ia2(ir)
k=0
do kk=1, nzl
if (a%ia1(jj+kk-1)<=atmp%m) then
k = k + 1
rtmp(k) = a%aspk(jj+kk-1)
atmp%ia1(j+k-1) = p%invperm(a%ia1(jj+kk-1))
endif
enddo
call psb_msort(atmp%ia1(j:j+k-1),ix=itmp2)
do kk=1,k
atmp%aspk(j+kk-1) = rtmp(itmp2(kk))
enddo
else if (ir <= atmp%m ) then
ir = ir - a%m
nzl = blck%ia2(ir+1) - blck%ia2(ir)
if (nzl > size(rtmp)) then
call psb_realloc(nzl,rtmp,info)
if(info/=0) then
info=4010
ch_err='psb_realloc'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
endif
jj = blck%ia2(ir)
k=0
do kk=1, nzl
if (blck%ia1(jj+kk-1)<=atmp%m) then
k = k + 1
rtmp(k) = blck%aspk(jj+kk-1)
atmp%ia1(j+k-1) = p%invperm(blck%ia1(jj+kk-1))
endif
enddo
call psb_msort(atmp%ia1(j:j+k-1),ix=itmp2)
do kk=1,k
atmp%aspk(j+kk-1) = rtmp(itmp2(kk))
enddo
else
write(0,*) 'Row index error 1 :',i,ir
endif
j = j + k
atmp%ia2(i+1) = j
enddo
t4 = psb_wtime()
deallocate(itmp,itmp2,rtmp)
end if
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
return
contains
subroutine gps_reduction(m,ia,ja,perm,iperm,info)
integer i,j,dgConn,Npnt,m
integer n,idpth,ideg,ibw2,ipf2
integer,dimension(:) :: perm,iperm,ia,ja
integer, intent(out) :: info
integer,dimension(:,:),allocatable::NDstk
integer,dimension(:),allocatable::iOld,renum,ndeg,lvl,lvls1,lvls2,ccstor
character(len=20) :: name, ch_err
if(psb_get_errstatus().ne.0) return
info=0
name='gps_reduction'
call psb_erractionsave(err_act)
!--- Calcolo il massimo grado di connettivita'.
npnt = m
write(6,*) ' GPS su ',npnt
dgConn=0
do i=1,m
dgconn = max(dgconn,(ia(i+1)-ia(i)))
enddo
!--- Il max valore di connettivita' e "dgConn"
!--- Valori della common
n=Npnt !--- Numero di righe
iDeg=dgConn !--- Massima connettivita'
! iDpth= !--- Numero di livelli non serve settarlo
allocate(NDstk(Npnt,dgConn),stat=info)
if (info/=0) then
info=4000
call psb_errpush(info,name)
goto 9999
else
write(0,*) 'gps_reduction first alloc OK'
endif
allocate(iOld(Npnt),renum(Npnt+1),ndeg(Npnt),lvl(Npnt),lvls1(Npnt),&
&lvls2(Npnt),ccstor(Npnt),stat=info)
if (info/=0) then
info=4000
call psb_errpush(info,name)
goto 9999
else
write(0,*) 'gps_reduction 2nd alloc OK'
endif
!--- Prepariamo il grafo della matrice
Ndstk(:,:)=0
do i=1,Npnt
k=0
do j = ia(i),ia(i+1) - 1
if ((1<=ja(j)).and.( ja( j ) /= i ).and.(ja(j)<=npnt)) then
k = k+1
Ndstk(i,k)=ja(j)
endif
enddo
ndeg(i)=k
enddo
!--- Numerazione.
do i=1,Npnt
iOld(i)=i
enddo
write(0,*) 'gps_red : Preparation done'
!---
!--- Chiamiamo funzione reduce.
call psb_gps_reduce(Ndstk,Npnt,iOld,renum,ndeg,lvl,lvls1, lvls2,ccstor,&
& ibw2,ipf2,n,idpth,ideg)
write(0,*) 'gps_red : Done reduce'
!--- Permutazione
perm(1:Npnt)=renum(1:Npnt)
!--- Inversa permutazione
do i=1,Npnt
iperm(perm(i))=i
enddo
!--- Puliamo tutto.
deallocate(NDstk,iOld,renum,ndeg,lvl,lvls1,lvls2,ccstor)
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine gps_reduction
end subroutine psb_dsp_renum
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