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Fix performance problem for RAS(0)

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psblas3-type-indexed
Salvatore Filippone 19 years ago
parent 0f2594dcc5
commit 5c564d13d8
1 changed files with 104 additions and 89 deletions
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193
src/prec/psb_dprec.f90
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@ -213,110 +213,125 @@ subroutine psb_dbaseprcaply(prec,x,beta,y,desc_data,trans,work,info)
case(asm_,ras_,ash_,rash_)
! 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))
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))
else
allocate(ww(isz),tx(isz),ty(isz),&
&aux(4*isz))
endif
if (debug) write(0,*)' vdiag: ',prec%d(:)
if (debug) write(0,*) 'Bi-CGSTAB with Additive Schwarz prec'
if (prec%iprcparm(n_ovr_)==0) then
! shortcut: this fixes performance for RAS(0) == BJA
call psb_dbjacaply(prec,x,beta,y,desc_data,trans,work,info)
if(info.ne.0) then
info=4010
ch_err='psb_bjacaply'
goto 9999
end if
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) = zero
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))
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))
else
allocate(ww(isz),tx(isz),ty(isz),&
&aux(4*isz))
endif
if (prec%iprcparm(restr_)==psb_halo_) then
call psb_halo(tx,prec%desc_data,info,work=aux)
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 PRCAPLY: Unknown value for restriction ',&
&prec%iprcparm(restr_)
end if
if (debug) write(0,*)' vdiag: ',prec%d(:)
if (debug) write(0,*) 'Bi-CGSTAB with Additive Schwarz prec'
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
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) = zero
if (prec%iprcparm(restr_)==psb_halo_) then
call psb_halo(tx,prec%desc_data,info,work=aux)
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 PRCAPLY: Unknown value for restriction ',&
&prec%iprcparm(restr_)
end if
endif
call psb_dbjacaply(prec,tx,zero,ty,prec%desc_data,trans,aux,info)
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
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
call psb_dbjacaply(prec,tx,zero,ty,prec%desc_data,trans,aux,info)
if(info.ne.0) then
info=4010
ch_err='psb_bjacaply'
goto 9999
end if
endif
select case (prec%iprcparm(prol_))
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
case(psb_none_)
! Would work anyway, but since it's supposed to do nothing...
! call f90_psovrl(ty,prec%desc_data,update_type=prec%a_restrict)
select case (prec%iprcparm(prol_))
case(psb_sum_,psb_avg_)
call psb_ovrl(ty,prec%desc_data,info,&
& update_type=prec%iprcparm(prol_),work=aux)
if(info /=0) then
info=4010
ch_err='psb_ovrl'
goto 9999
end if
case(psb_none_)
! Would work anyway, but since it's supposed to do nothing...
! call f90_psovrl(ty,prec%desc_data,update_type=prec%a_restrict)
case default
write(0,*) 'Problem in PRCAPLY: Unknown value for prolongation ',&
& prec%iprcparm(prol_)
end select
case(psb_sum_,psb_avg_)
call psb_ovrl(ty,prec%desc_data,info,&
& update_type=prec%iprcparm(prol_),work=aux)
if(info /=0) then
info=4010
ch_err='psb_ovrl'
goto 9999
end if
if (beta == zero) then
y(1:desc_data%matrix_data(psb_n_row_)) = ty(1:desc_data%matrix_data(psb_n_row_))
else if (beta == one) then
y(1:desc_data%matrix_data(psb_n_row_)) = y(1:desc_data%matrix_data(psb_n_row_)) + &
& ty(1:desc_data%matrix_data(psb_n_row_))
else if (beta == -one) then
y(1:desc_data%matrix_data(psb_n_row_)) = -y(1:desc_data%matrix_data(psb_n_row_)) + &
& ty(1:desc_data%matrix_data(psb_n_row_))
else
y(1:desc_data%matrix_data(psb_n_row_)) = beta*y(1:desc_data%matrix_data(psb_n_row_)) + &
& ty(1:desc_data%matrix_data(psb_n_row_))
end if
case default
write(0,*) 'Problem in PRCAPLY: Unknown value for prolongation ',&
& prec%iprcparm(prol_)
end select
if (beta == zero) then
y(1:desc_data%matrix_data(psb_n_row_)) = ty(1:desc_data%matrix_data(psb_n_row_))
else if (beta == one) then
y(1:desc_data%matrix_data(psb_n_row_)) = y(1:desc_data%matrix_data(psb_n_row_)) + &
& ty(1:desc_data%matrix_data(psb_n_row_))
else if (beta == -one) then
y(1:desc_data%matrix_data(psb_n_row_)) = -y(1:desc_data%matrix_data(psb_n_row_)) + &
& ty(1:desc_data%matrix_data(psb_n_row_))
else
y(1:desc_data%matrix_data(psb_n_row_)) = beta*y(1:desc_data%matrix_data(psb_n_row_)) + &
& ty(1:desc_data%matrix_data(psb_n_row_))
end if
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
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_,diagsc_,bja_,&

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