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Richardson version for AS.

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richardson
Salvatore Filippone 5 years ago
parent f67b61d23f
commit 83c14397eb
8 changed files with 1716 additions and 792 deletions
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104
mlprec/impl/smoother/mld_c_as_smoother_apply.f90
Unescape Escape View File

@ -105,6 +105,108 @@ subroutine mld_c_as_smoother_apply(alpha,sm,x,beta,y,desc_data,trans,&
end if
endif
if (.false.) then
if (sweeps > 0) then
!
!
! Apply multiple sweeps of an AS solver
! to compute an approximate solution of a linear system.
!
!
call psb_geasb(tx,sm%desc_data,info)
call psb_geasb(ty,sm%desc_data,info)
call psb_geasb(ww,sm%desc_data,info)
!
! Unroll the first iteration and fold it inside SELECT CASE
! this will save one SPMM when INIT=Z, and will be
! significant when sweeps=1 (a common case)
!
select case (init_)
case('Z')
call psb_geaxpby(cone,x,czero,tx,desc_data,info)
if (info == 0) call sm%apply_restr(tx,trans_,aux,info)
call sm%sv%apply(cone,tx,czero,ty,sm%desc_data,trans_,aux,info,init='Z')
case('Y')
call psb_geaxpby(cone,x,czero,tx,desc_data,info)
if (info == 0) call psb_spmm(-cone,sm%pa,y,cone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info == 0) call sm%apply_restr(tx,trans_,aux,info)
call sm%sv%apply(cone,ww,czero,ty,sm%desc_data,trans_,aux,info,init='Y')
case('U')
if (.not.present(initu)) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='missing initu to smoother_apply')
goto 9999
end if
call psb_geaxpby(cone,x,czero,ww,desc_data,info)
call psb_geaxpby(cone,initu,czero,ty,desc_data,info)
if (info == 0) call psb_spmm(-cone,sm%pa,ty,cone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(cone,ww,czero,ty,desc_data,trans_,aux,info,init='Y')
case default
call psb_errpush(psb_err_internal_error_,name,&
& a_err='wrong init to smoother_apply')
goto 9999
end select
if (info == 0) call sm%apply_prol(ty,trans_,aux,info)
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='Error in sub_aply Jacobi Sweeps = 1')
goto 9999
endif
do i=1, sweeps-1
!
! Compute Y(j+1) = Y(j)+D^(-1)*(X-A*Y(j)), where D and ND are the
! block diagonal part and the remaining part of the local matrix
! and Y(j) is the approximate solution at sweep j.
!
if (info == 0) call psb_geaxpby(cone,x,czero,ww,desc_data,info)
if (info == 0) call psb_spmm(-cone,sm%pa,ty,cone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info /= psb_success_) exit
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(cone,ww,czero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Y')
if (info /= psb_success_) exit
if (info == 0) call sm%apply_prol(ty,trans_,aux,info)
end do
if (info /= psb_success_) then
info=psb_err_internal_error_
call psb_errpush(info,name,&
& a_err='subsolve with Jacobi sweeps > 1')
goto 9999
end if
!
! Compute y = beta*y + alpha*ty (ty == K^(-1)*tx)
!
call psb_geaxpby(alpha,ty,beta,y,desc_data,info)
else if (sweeps == 0) then
!
! 0 sweeps of smoother is the identity operator
!
call psb_geaxpby(alpha,x,beta,y,desc_data,info)
else
info = psb_err_iarg_neg_
call psb_errpush(info,name,&
& i_err=(/itwo,sweeps,izero,izero,izero/))
goto 9999
endif
else
if ((.not.sm%sv%is_iterative()).and.(sweeps == 1).and.(sm%novr==0)) then
!
! Shortcut: in this case there is nothing else to be done.
@ -213,7 +315,7 @@ subroutine mld_c_as_smoother_apply(alpha,sm,x,beta,y,desc_data,trans,&
goto 9999
endif
end if
if (.not.(4*isz <= size(work))) then
deallocate(aux,stat=info)

131
mlprec/impl/smoother/mld_c_as_smoother_apply_vect.f90
Unescape Escape View File

@ -107,6 +107,135 @@ subroutine mld_c_as_smoother_apply_vect(alpha,sm,x,beta,y,desc_data,trans,&
end if
endif
if (.true.) then
if (sweeps > 0) then
!
!
! Apply multiple sweeps of an AS solver
! to compute an approximate solution of a linear system.
!
!
if (size(wv) < 3) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='invalid wv size in smoother_apply')
goto 9999
end if
!
! This is tricky. This smoother has a descriptor sm%desc_data
! for an index space potentially different from
! that of desc_data. Hence the size of the work vectors
! could be wrong. We need to check and reallocate as needed.
!
do_realloc_wv = (wv(1)%get_nrows() < sm%desc_data%get_local_cols()).or.&
& (wv(2)%get_nrows() < sm%desc_data%get_local_cols()).or.&
& (wv(3)%get_nrows() < sm%desc_data%get_local_cols())
if (do_realloc_wv) then
call psb_geasb(wv(1),sm%desc_data,info,scratch=.true.,mold=wv(2)%v)
call psb_geasb(wv(2),sm%desc_data,info,scratch=.true.,mold=wv(1)%v)
call psb_geasb(wv(3),sm%desc_data,info,scratch=.true.,mold=wv(1)%v)
end if
associate(tx => wv(1), ty => wv(2), ww => wv(3))
! Need to zero tx because of the apply_restr call.
call tx%zero()
!
! Unroll the first iteration and fold it inside SELECT CASE
! this will save one SPMM when INIT=Z, and will be
! significant when sweeps=1 (a common case)
!
select case (init_)
case('Z')
call psb_geaxpby(cone,x,czero,tx,desc_data,info)
if (info == 0) call sm%apply_restr(tx,trans_,aux,info)
call sm%sv%apply(cone,tx,czero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Z')
case('Y')
call psb_geaxpby(cone,x,czero,ww,desc_data,info)
if (info == 0) call psb_spmm(-cone,sm%pa,y,cone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(cone,ww,czero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Y')
case('U')
if (.not.present(initu)) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='missing initu to smoother_apply')
goto 9999
end if
call psb_geaxpby(cone,x,czero,ww,desc_data,info)
call psb_geaxpby(cone,initu,czero,ty,desc_data,info)
if (info == 0) call psb_spmm(-cone,sm%pa,ty,cone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(cone,ww,czero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Y')
case default
call psb_errpush(psb_err_internal_error_,name,&
& a_err='wrong init to smoother_apply')
goto 9999
end select
if (info == 0) call sm%apply_prol(ty,trans_,aux,info)
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='Error in sub_aply Jacobi Sweeps = 1')
goto 9999
endif
do i=1, sweeps-1
!
! Compute Y(j+1) = Y(j)+D^(-1)*(X-A*Y(j)), where D and ND are the
! block diagonal part and the remaining part of the local matrix
! and Y(j) is the approximate solution at sweep j.
!
if (info == 0) call psb_geaxpby(cone,x,czero,ww,desc_data,info)
if (info == 0) call psb_spmm(-cone,sm%pa,ty,cone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info /= psb_success_) exit
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(cone,ww,czero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Y')
if (info /= psb_success_) exit
if (info == 0) call sm%apply_prol(ty,trans_,aux,info)
end do
if (info /= psb_success_) then
info=psb_err_internal_error_
call psb_errpush(info,name,&
& a_err='subsolve with Jacobi sweeps > 1')
goto 9999
end if
!
! Compute y = beta*y + alpha*ty (ty == K^(-1)*tx)
!
call psb_geaxpby(alpha,ty,beta,y,desc_data,info)
end associate
else if (sweeps == 0) then
!
! 0 sweeps of smoother is the identity operator
!
call psb_geaxpby(alpha,x,beta,y,desc_data,info)
else
info = psb_err_iarg_neg_
call psb_errpush(info,name,&
& i_err=(/itwo,sweeps,izero,izero,izero/))
goto 9999
endif
else
if ((.not.sm%sv%is_iterative()).and.(sweeps == 1).and.(sm%novr==0)) then
!
! Shortcut: in this case there is nothing else to be done.
@ -237,7 +366,7 @@ subroutine mld_c_as_smoother_apply_vect(alpha,sm,x,beta,y,desc_data,trans,&
goto 9999
endif
end if
if (.not.(4*isz <= size(work))) then
deallocate(aux,stat=info)

104
mlprec/impl/smoother/mld_d_as_smoother_apply.f90
Unescape Escape View File

@ -105,6 +105,108 @@ subroutine mld_d_as_smoother_apply(alpha,sm,x,beta,y,desc_data,trans,&
end if
endif
if (.false.) then
if (sweeps > 0) then
!
!
! Apply multiple sweeps of an AS solver
! to compute an approximate solution of a linear system.
!
!
call psb_geasb(tx,sm%desc_data,info)
call psb_geasb(ty,sm%desc_data,info)
call psb_geasb(ww,sm%desc_data,info)
!
! Unroll the first iteration and fold it inside SELECT CASE
! this will save one SPMM when INIT=Z, and will be
! significant when sweeps=1 (a common case)
!
select case (init_)
case('Z')
call psb_geaxpby(done,x,dzero,tx,desc_data,info)
if (info == 0) call sm%apply_restr(tx,trans_,aux,info)
call sm%sv%apply(done,tx,dzero,ty,sm%desc_data,trans_,aux,info,init='Z')
case('Y')
call psb_geaxpby(done,x,dzero,tx,desc_data,info)
if (info == 0) call psb_spmm(-done,sm%pa,y,done,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info == 0) call sm%apply_restr(tx,trans_,aux,info)
call sm%sv%apply(done,ww,dzero,ty,sm%desc_data,trans_,aux,info,init='Y')
case('U')
if (.not.present(initu)) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='missing initu to smoother_apply')
goto 9999
end if
call psb_geaxpby(done,x,dzero,ww,desc_data,info)
call psb_geaxpby(done,initu,dzero,ty,desc_data,info)
if (info == 0) call psb_spmm(-done,sm%pa,ty,done,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(done,ww,dzero,ty,desc_data,trans_,aux,info,init='Y')
case default
call psb_errpush(psb_err_internal_error_,name,&
& a_err='wrong init to smoother_apply')
goto 9999
end select
if (info == 0) call sm%apply_prol(ty,trans_,aux,info)
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='Error in sub_aply Jacobi Sweeps = 1')
goto 9999
endif
do i=1, sweeps-1
!
! Compute Y(j+1) = Y(j)+D^(-1)*(X-A*Y(j)), where D and ND are the
! block diagonal part and the remaining part of the local matrix
! and Y(j) is the approximate solution at sweep j.
!
if (info == 0) call psb_geaxpby(done,x,dzero,ww,desc_data,info)
if (info == 0) call psb_spmm(-done,sm%pa,ty,done,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info /= psb_success_) exit
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(done,ww,dzero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Y')
if (info /= psb_success_) exit
if (info == 0) call sm%apply_prol(ty,trans_,aux,info)
end do
if (info /= psb_success_) then
info=psb_err_internal_error_
call psb_errpush(info,name,&
& a_err='subsolve with Jacobi sweeps > 1')
goto 9999
end if
!
! Compute y = beta*y + alpha*ty (ty == K^(-1)*tx)
!
call psb_geaxpby(alpha,ty,beta,y,desc_data,info)
else if (sweeps == 0) then
!
! 0 sweeps of smoother is the identity operator
!
call psb_geaxpby(alpha,x,beta,y,desc_data,info)
else
info = psb_err_iarg_neg_
call psb_errpush(info,name,&
& i_err=(/itwo,sweeps,izero,izero,izero/))
goto 9999
endif
else
if ((.not.sm%sv%is_iterative()).and.(sweeps == 1).and.(sm%novr==0)) then
!
! Shortcut: in this case there is nothing else to be done.
@ -213,7 +315,7 @@ subroutine mld_d_as_smoother_apply(alpha,sm,x,beta,y,desc_data,trans,&
goto 9999
endif
end if
if (.not.(4*isz <= size(work))) then
deallocate(aux,stat=info)

131
mlprec/impl/smoother/mld_d_as_smoother_apply_vect.f90
Unescape Escape View File

@ -107,6 +107,135 @@ subroutine mld_d_as_smoother_apply_vect(alpha,sm,x,beta,y,desc_data,trans,&
end if
endif
if (.true.) then
if (sweeps > 0) then
!
!
! Apply multiple sweeps of an AS solver
! to compute an approximate solution of a linear system.
!
!
if (size(wv) < 3) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='invalid wv size in smoother_apply')
goto 9999
end if
!
! This is tricky. This smoother has a descriptor sm%desc_data
! for an index space potentially different from
! that of desc_data. Hence the size of the work vectors
! could be wrong. We need to check and reallocate as needed.
!
do_realloc_wv = (wv(1)%get_nrows() < sm%desc_data%get_local_cols()).or.&
& (wv(2)%get_nrows() < sm%desc_data%get_local_cols()).or.&
& (wv(3)%get_nrows() < sm%desc_data%get_local_cols())
if (do_realloc_wv) then
call psb_geasb(wv(1),sm%desc_data,info,scratch=.true.,mold=wv(2)%v)
call psb_geasb(wv(2),sm%desc_data,info,scratch=.true.,mold=wv(1)%v)
call psb_geasb(wv(3),sm%desc_data,info,scratch=.true.,mold=wv(1)%v)
end if
associate(tx => wv(1), ty => wv(2), ww => wv(3))
! Need to zero tx because of the apply_restr call.
call tx%zero()
!
! Unroll the first iteration and fold it inside SELECT CASE
! this will save one SPMM when INIT=Z, and will be
! significant when sweeps=1 (a common case)
!
select case (init_)
case('Z')
call psb_geaxpby(done,x,dzero,tx,desc_data,info)
if (info == 0) call sm%apply_restr(tx,trans_,aux,info)
call sm%sv%apply(done,tx,dzero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Z')
case('Y')
call psb_geaxpby(done,x,dzero,ww,desc_data,info)
if (info == 0) call psb_spmm(-done,sm%pa,y,done,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(done,ww,dzero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Y')
case('U')
if (.not.present(initu)) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='missing initu to smoother_apply')
goto 9999
end if
call psb_geaxpby(done,x,dzero,ww,desc_data,info)
call psb_geaxpby(done,initu,dzero,ty,desc_data,info)
if (info == 0) call psb_spmm(-done,sm%pa,ty,done,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(done,ww,dzero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Y')
case default
call psb_errpush(psb_err_internal_error_,name,&
& a_err='wrong init to smoother_apply')
goto 9999
end select
if (info == 0) call sm%apply_prol(ty,trans_,aux,info)
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='Error in sub_aply Jacobi Sweeps = 1')
goto 9999
endif
do i=1, sweeps-1
!
! Compute Y(j+1) = Y(j)+D^(-1)*(X-A*Y(j)), where D and ND are the
! block diagonal part and the remaining part of the local matrix
! and Y(j) is the approximate solution at sweep j.
!
if (info == 0) call psb_geaxpby(done,x,dzero,ww,desc_data,info)
if (info == 0) call psb_spmm(-done,sm%pa,ty,done,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info /= psb_success_) exit
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(done,ww,dzero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Y')
if (info /= psb_success_) exit
if (info == 0) call sm%apply_prol(ty,trans_,aux,info)
end do
if (info /= psb_success_) then
info=psb_err_internal_error_
call psb_errpush(info,name,&
& a_err='subsolve with Jacobi sweeps > 1')
goto 9999
end if
!
! Compute y = beta*y + alpha*ty (ty == K^(-1)*tx)
!
call psb_geaxpby(alpha,ty,beta,y,desc_data,info)
end associate
else if (sweeps == 0) then
!
! 0 sweeps of smoother is the identity operator
!
call psb_geaxpby(alpha,x,beta,y,desc_data,info)
else
info = psb_err_iarg_neg_
call psb_errpush(info,name,&
& i_err=(/itwo,sweeps,izero,izero,izero/))
goto 9999
endif
else
if ((.not.sm%sv%is_iterative()).and.(sweeps == 1).and.(sm%novr==0)) then
!
! Shortcut: in this case there is nothing else to be done.
@ -237,7 +366,7 @@ subroutine mld_d_as_smoother_apply_vect(alpha,sm,x,beta,y,desc_data,trans,&
goto 9999
endif
end if
if (.not.(4*isz <= size(work))) then
deallocate(aux,stat=info)

104
mlprec/impl/smoother/mld_s_as_smoother_apply.f90
Unescape Escape View File

@ -105,6 +105,108 @@ subroutine mld_s_as_smoother_apply(alpha,sm,x,beta,y,desc_data,trans,&
end if
endif
if (.false.) then
if (sweeps > 0) then
!
!
! Apply multiple sweeps of an AS solver
! to compute an approximate solution of a linear system.
!
!
call psb_geasb(tx,sm%desc_data,info)
call psb_geasb(ty,sm%desc_data,info)
call psb_geasb(ww,sm%desc_data,info)
!
! Unroll the first iteration and fold it inside SELECT CASE
! this will save one SPMM when INIT=Z, and will be
! significant when sweeps=1 (a common case)
!
select case (init_)
case('Z')
call psb_geaxpby(sone,x,szero,tx,desc_data,info)
if (info == 0) call sm%apply_restr(tx,trans_,aux,info)
call sm%sv%apply(sone,tx,szero,ty,sm%desc_data,trans_,aux,info,init='Z')
case('Y')
call psb_geaxpby(sone,x,szero,tx,desc_data,info)
if (info == 0) call psb_spmm(-sone,sm%pa,y,sone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info == 0) call sm%apply_restr(tx,trans_,aux,info)
call sm%sv%apply(sone,ww,szero,ty,sm%desc_data,trans_,aux,info,init='Y')
case('U')
if (.not.present(initu)) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='missing initu to smoother_apply')
goto 9999
end if
call psb_geaxpby(sone,x,szero,ww,desc_data,info)
call psb_geaxpby(sone,initu,szero,ty,desc_data,info)
if (info == 0) call psb_spmm(-sone,sm%pa,ty,sone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(sone,ww,szero,ty,desc_data,trans_,aux,info,init='Y')
case default
call psb_errpush(psb_err_internal_error_,name,&
& a_err='wrong init to smoother_apply')
goto 9999
end select
if (info == 0) call sm%apply_prol(ty,trans_,aux,info)
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='Error in sub_aply Jacobi Sweeps = 1')
goto 9999
endif
do i=1, sweeps-1
!
! Compute Y(j+1) = Y(j)+D^(-1)*(X-A*Y(j)), where D and ND are the
! block diagonal part and the remaining part of the local matrix
! and Y(j) is the approximate solution at sweep j.
!
if (info == 0) call psb_geaxpby(sone,x,szero,ww,desc_data,info)
if (info == 0) call psb_spmm(-sone,sm%pa,ty,sone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info /= psb_success_) exit
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(sone,ww,szero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Y')
if (info /= psb_success_) exit
if (info == 0) call sm%apply_prol(ty,trans_,aux,info)
end do
if (info /= psb_success_) then
info=psb_err_internal_error_
call psb_errpush(info,name,&
& a_err='subsolve with Jacobi sweeps > 1')
goto 9999
end if
!
! Compute y = beta*y + alpha*ty (ty == K^(-1)*tx)
!
call psb_geaxpby(alpha,ty,beta,y,desc_data,info)
else if (sweeps == 0) then
!
! 0 sweeps of smoother is the identity operator
!
call psb_geaxpby(alpha,x,beta,y,desc_data,info)
else
info = psb_err_iarg_neg_
call psb_errpush(info,name,&
& i_err=(/itwo,sweeps,izero,izero,izero/))
goto 9999
endif
else
if ((.not.sm%sv%is_iterative()).and.(sweeps == 1).and.(sm%novr==0)) then
!
! Shortcut: in this case there is nothing else to be done.
@ -213,7 +315,7 @@ subroutine mld_s_as_smoother_apply(alpha,sm,x,beta,y,desc_data,trans,&
goto 9999
endif
end if
if (.not.(4*isz <= size(work))) then
deallocate(aux,stat=info)

131
mlprec/impl/smoother/mld_s_as_smoother_apply_vect.f90
Unescape Escape View File

@ -107,6 +107,135 @@ subroutine mld_s_as_smoother_apply_vect(alpha,sm,x,beta,y,desc_data,trans,&
end if
endif
if (.true.) then
if (sweeps > 0) then
!
!
! Apply multiple sweeps of an AS solver
! to compute an approximate solution of a linear system.
!
!
if (size(wv) < 3) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='invalid wv size in smoother_apply')
goto 9999
end if
!
! This is tricky. This smoother has a descriptor sm%desc_data
! for an index space potentially different from
! that of desc_data. Hence the size of the work vectors
! could be wrong. We need to check and reallocate as needed.
!
do_realloc_wv = (wv(1)%get_nrows() < sm%desc_data%get_local_cols()).or.&
& (wv(2)%get_nrows() < sm%desc_data%get_local_cols()).or.&
& (wv(3)%get_nrows() < sm%desc_data%get_local_cols())
if (do_realloc_wv) then
call psb_geasb(wv(1),sm%desc_data,info,scratch=.true.,mold=wv(2)%v)
call psb_geasb(wv(2),sm%desc_data,info,scratch=.true.,mold=wv(1)%v)
call psb_geasb(wv(3),sm%desc_data,info,scratch=.true.,mold=wv(1)%v)
end if
associate(tx => wv(1), ty => wv(2), ww => wv(3))
! Need to zero tx because of the apply_restr call.
call tx%zero()
!
! Unroll the first iteration and fold it inside SELECT CASE
! this will save one SPMM when INIT=Z, and will be
! significant when sweeps=1 (a common case)
!
select case (init_)
case('Z')
call psb_geaxpby(sone,x,szero,tx,desc_data,info)
if (info == 0) call sm%apply_restr(tx,trans_,aux,info)
call sm%sv%apply(sone,tx,szero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Z')
case('Y')
call psb_geaxpby(sone,x,szero,ww,desc_data,info)
if (info == 0) call psb_spmm(-sone,sm%pa,y,sone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(sone,ww,szero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Y')
case('U')
if (.not.present(initu)) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='missing initu to smoother_apply')
goto 9999
end if
call psb_geaxpby(sone,x,szero,ww,desc_data,info)
call psb_geaxpby(sone,initu,szero,ty,desc_data,info)
if (info == 0) call psb_spmm(-sone,sm%pa,ty,sone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(sone,ww,szero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Y')
case default
call psb_errpush(psb_err_internal_error_,name,&
& a_err='wrong init to smoother_apply')
goto 9999
end select
if (info == 0) call sm%apply_prol(ty,trans_,aux,info)
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='Error in sub_aply Jacobi Sweeps = 1')
goto 9999
endif
do i=1, sweeps-1
!
! Compute Y(j+1) = Y(j)+D^(-1)*(X-A*Y(j)), where D and ND are the
! block diagonal part and the remaining part of the local matrix
! and Y(j) is the approximate solution at sweep j.
!
if (info == 0) call psb_geaxpby(sone,x,szero,ww,desc_data,info)
if (info == 0) call psb_spmm(-sone,sm%pa,ty,sone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info /= psb_success_) exit
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(sone,ww,szero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Y')
if (info /= psb_success_) exit
if (info == 0) call sm%apply_prol(ty,trans_,aux,info)
end do
if (info /= psb_success_) then
info=psb_err_internal_error_
call psb_errpush(info,name,&
& a_err='subsolve with Jacobi sweeps > 1')
goto 9999
end if
!
! Compute y = beta*y + alpha*ty (ty == K^(-1)*tx)
!
call psb_geaxpby(alpha,ty,beta,y,desc_data,info)
end associate
else if (sweeps == 0) then
!
! 0 sweeps of smoother is the identity operator
!
call psb_geaxpby(alpha,x,beta,y,desc_data,info)
else
info = psb_err_iarg_neg_
call psb_errpush(info,name,&
& i_err=(/itwo,sweeps,izero,izero,izero/))
goto 9999
endif
else
if ((.not.sm%sv%is_iterative()).and.(sweeps == 1).and.(sm%novr==0)) then
!
! Shortcut: in this case there is nothing else to be done.
@ -237,7 +366,7 @@ subroutine mld_s_as_smoother_apply_vect(alpha,sm,x,beta,y,desc_data,trans,&
goto 9999
endif
end if
if (.not.(4*isz <= size(work))) then
deallocate(aux,stat=info)

104
mlprec/impl/smoother/mld_z_as_smoother_apply.f90
Unescape Escape View File

@ -105,6 +105,108 @@ subroutine mld_z_as_smoother_apply(alpha,sm,x,beta,y,desc_data,trans,&
end if
endif
if (.false.) then
if (sweeps > 0) then
!
!
! Apply multiple sweeps of an AS solver
! to compute an approximate solution of a linear system.
!
!
call psb_geasb(tx,sm%desc_data,info)
call psb_geasb(ty,sm%desc_data,info)
call psb_geasb(ww,sm%desc_data,info)
!
! Unroll the first iteration and fold it inside SELECT CASE
! this will save one SPMM when INIT=Z, and will be
! significant when sweeps=1 (a common case)
!
select case (init_)
case('Z')
call psb_geaxpby(zone,x,zzero,tx,desc_data,info)
if (info == 0) call sm%apply_restr(tx,trans_,aux,info)
call sm%sv%apply(zone,tx,zzero,ty,sm%desc_data,trans_,aux,info,init='Z')
case('Y')
call psb_geaxpby(zone,x,zzero,tx,desc_data,info)
if (info == 0) call psb_spmm(-zone,sm%pa,y,zone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info == 0) call sm%apply_restr(tx,trans_,aux,info)
call sm%sv%apply(zone,ww,zzero,ty,sm%desc_data,trans_,aux,info,init='Y')
case('U')
if (.not.present(initu)) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='missing initu to smoother_apply')
goto 9999
end if
call psb_geaxpby(zone,x,zzero,ww,desc_data,info)
call psb_geaxpby(zone,initu,zzero,ty,desc_data,info)
if (info == 0) call psb_spmm(-zone,sm%pa,ty,zone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(zone,ww,zzero,ty,desc_data,trans_,aux,info,init='Y')
case default
call psb_errpush(psb_err_internal_error_,name,&
& a_err='wrong init to smoother_apply')
goto 9999
end select
if (info == 0) call sm%apply_prol(ty,trans_,aux,info)
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='Error in sub_aply Jacobi Sweeps = 1')
goto 9999
endif
do i=1, sweeps-1
!
! Compute Y(j+1) = Y(j)+D^(-1)*(X-A*Y(j)), where D and ND are the
! block diagonal part and the remaining part of the local matrix
! and Y(j) is the approximate solution at sweep j.
!
if (info == 0) call psb_geaxpby(zone,x,zzero,ww,desc_data,info)
if (info == 0) call psb_spmm(-zone,sm%pa,ty,zone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info /= psb_success_) exit
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(zone,ww,zzero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Y')
if (info /= psb_success_) exit
if (info == 0) call sm%apply_prol(ty,trans_,aux,info)
end do
if (info /= psb_success_) then
info=psb_err_internal_error_
call psb_errpush(info,name,&
& a_err='subsolve with Jacobi sweeps > 1')
goto 9999
end if
!
! Compute y = beta*y + alpha*ty (ty == K^(-1)*tx)
!
call psb_geaxpby(alpha,ty,beta,y,desc_data,info)
else if (sweeps == 0) then
!
! 0 sweeps of smoother is the identity operator
!
call psb_geaxpby(alpha,x,beta,y,desc_data,info)
else
info = psb_err_iarg_neg_
call psb_errpush(info,name,&
& i_err=(/itwo,sweeps,izero,izero,izero/))
goto 9999
endif
else
if ((.not.sm%sv%is_iterative()).and.(sweeps == 1).and.(sm%novr==0)) then
!
! Shortcut: in this case there is nothing else to be done.
@ -213,7 +315,7 @@ subroutine mld_z_as_smoother_apply(alpha,sm,x,beta,y,desc_data,trans,&
goto 9999
endif
end if
if (.not.(4*isz <= size(work))) then
deallocate(aux,stat=info)

131
mlprec/impl/smoother/mld_z_as_smoother_apply_vect.f90
Unescape Escape View File

@ -107,6 +107,135 @@ subroutine mld_z_as_smoother_apply_vect(alpha,sm,x,beta,y,desc_data,trans,&
end if
endif
if (.true.) then
if (sweeps > 0) then
!
!
! Apply multiple sweeps of an AS solver
! to compute an approximate solution of a linear system.
!
!
if (size(wv) < 3) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='invalid wv size in smoother_apply')
goto 9999
end if
!
! This is tricky. This smoother has a descriptor sm%desc_data
! for an index space potentially different from
! that of desc_data. Hence the size of the work vectors
! could be wrong. We need to check and reallocate as needed.
!
do_realloc_wv = (wv(1)%get_nrows() < sm%desc_data%get_local_cols()).or.&
& (wv(2)%get_nrows() < sm%desc_data%get_local_cols()).or.&
& (wv(3)%get_nrows() < sm%desc_data%get_local_cols())
if (do_realloc_wv) then
call psb_geasb(wv(1),sm%desc_data,info,scratch=.true.,mold=wv(2)%v)
call psb_geasb(wv(2),sm%desc_data,info,scratch=.true.,mold=wv(1)%v)
call psb_geasb(wv(3),sm%desc_data,info,scratch=.true.,mold=wv(1)%v)
end if
associate(tx => wv(1), ty => wv(2), ww => wv(3))
! Need to zero tx because of the apply_restr call.
call tx%zero()
!
! Unroll the first iteration and fold it inside SELECT CASE
! this will save one SPMM when INIT=Z, and will be
! significant when sweeps=1 (a common case)
!
select case (init_)
case('Z')
call psb_geaxpby(zone,x,zzero,tx,desc_data,info)
if (info == 0) call sm%apply_restr(tx,trans_,aux,info)
call sm%sv%apply(zone,tx,zzero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Z')
case('Y')
call psb_geaxpby(zone,x,zzero,ww,desc_data,info)
if (info == 0) call psb_spmm(-zone,sm%pa,y,zone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(zone,ww,zzero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Y')
case('U')
if (.not.present(initu)) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='missing initu to smoother_apply')
goto 9999
end if
call psb_geaxpby(zone,x,zzero,ww,desc_data,info)
call psb_geaxpby(zone,initu,zzero,ty,desc_data,info)
if (info == 0) call psb_spmm(-zone,sm%pa,ty,zone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(zone,ww,zzero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Y')
case default
call psb_errpush(psb_err_internal_error_,name,&
& a_err='wrong init to smoother_apply')
goto 9999
end select
if (info == 0) call sm%apply_prol(ty,trans_,aux,info)
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='Error in sub_aply Jacobi Sweeps = 1')
goto 9999
endif
do i=1, sweeps-1
!
! Compute Y(j+1) = Y(j)+D^(-1)*(X-A*Y(j)), where D and ND are the
! block diagonal part and the remaining part of the local matrix
! and Y(j) is the approximate solution at sweep j.
!
if (info == 0) call psb_geaxpby(zone,x,zzero,ww,desc_data,info)
if (info == 0) call psb_spmm(-zone,sm%pa,ty,zone,ww,desc_data,info,&
& work=aux,trans=trans_)
if (info /= psb_success_) exit
if (info == 0) call sm%apply_restr(ww,trans_,aux,info)
call sm%sv%apply(zone,ww,zzero,ty,sm%desc_data,trans_,aux,wv(4:),info,init='Y')
if (info /= psb_success_) exit
if (info == 0) call sm%apply_prol(ty,trans_,aux,info)
end do
if (info /= psb_success_) then
info=psb_err_internal_error_
call psb_errpush(info,name,&
& a_err='subsolve with Jacobi sweeps > 1')
goto 9999
end if
!
! Compute y = beta*y + alpha*ty (ty == K^(-1)*tx)
!
call psb_geaxpby(alpha,ty,beta,y,desc_data,info)
end associate
else if (sweeps == 0) then
!
! 0 sweeps of smoother is the identity operator
!
call psb_geaxpby(alpha,x,beta,y,desc_data,info)
else
info = psb_err_iarg_neg_
call psb_errpush(info,name,&
& i_err=(/itwo,sweeps,izero,izero,izero/))
goto 9999
endif
else
if ((.not.sm%sv%is_iterative()).and.(sweeps == 1).and.(sm%novr==0)) then
!
! Shortcut: in this case there is nothing else to be done.
@ -237,7 +366,7 @@ subroutine mld_z_as_smoother_apply_vect(alpha,sm,x,beta,y,desc_data,trans,&
goto 9999
endif
end if
if (.not.(4*isz <= size(work))) then
deallocate(aux,stat=info)

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