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psblas3/base/tools/psb_zcdbldext.F90

712 lines
24 KiB
Fortran

!
! Parallel Sparse BLAS version 3.5
! (C) Copyright 2006-2018
! Salvatore Filippone
! Alfredo Buttari
!
! 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 PSBLAS 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 PSBLAS 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.
!
!
! File: psb_zcdbldext.f90
!
! Subroutine: psb_zcdbldext
! This routine takes a matrix A with its descriptor, and builds the
! auxiliary descriptor corresponding to the number of overlap levels
! specified on input.
!
! Arguments:
! a - type(psb_zspmat_type). The input sparse matrix.
! desc_a - type(psb_desc_type). The input communication descriptor.
! novr - integer. The number of overlap levels.
! desc_ov - type(psb_desc_type). The auxiliary output communication
! descriptor.
! info - integer. Return code.
! extype - integer. Choice of type of overlap:
! psb_ovt_xhal_: build a descriptor with an extended
! stencil, i.e. enlarge the existing
! halo by novr additional layers.
! psb_ovt_asov_: build a descriptor suitable
! for Additive Schwarz preconditioner.
! This last choice implies that:
! a. The novr halo layers are added to
! the overlap;
! b. The novr layers are also copied to
! the ext_ structure to provide
! the mapping between the base
! descriptor and the overlapped one.
! c. The (novr+1)-th layer becomes the
! new halo.
!
Subroutine psb_zcdbldext(a,desc_a,novr,desc_ov,info, extype)
use psb_base_mod, psb_protect_name => psb_zcdbldext
use psi_mod
#ifdef MPI_MOD
use mpi
#endif
Implicit None
#ifdef MPI_H
include 'mpif.h'
#endif
! .. Array Arguments ..
integer(psb_ipk_), intent(in) :: novr
Type(psb_zspmat_type), Intent(in) :: a
Type(psb_desc_type), Intent(inout), target :: desc_a
Type(psb_desc_type), Intent(out) :: desc_ov
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_), intent(in),optional :: extype
! .. Local Scalars ..
integer(psb_ipk_) :: i, j, err_act,m,&
& lovr, lworks,lworkr, n_row,n_col, n_col_prev, &
& index_dim,elem_dim, l_tmp_ovr_idx,l_tmp_halo, nztot,nhalo
integer(psb_ipk_) :: counter,counter_h, counter_o, counter_e, &
& idx,proc,n_elem_recv,&
& n_elem_send,tot_recv,tot_elem,cntov_o,&
& counter_t,n_elem,i_ovr,jj,proc_id,isz, &
& idxr, idxs, iszr, iszs, nxch, nsnd, nrcv,lidx, extype_
integer(psb_lpk_) :: gidx, lnz
type(psb_ctxt_type) :: ctxt
integer(psb_ipk_) :: me, np
integer(psb_mpk_) :: icomm, minfo
integer(psb_ipk_), allocatable :: irow(:), icol(:)
integer(psb_ipk_), allocatable :: tmp_halo(:),tmp_ovr_idx(:), orig_ovr(:)
integer(psb_lpk_), allocatable :: works(:),workr(:)
integer(psb_ipk_), allocatable :: halo(:),ovrlap(:),&
& t_halo_in(:), t_halo_out(:),temp(:),maskr(:)
integer(psb_mpk_),allocatable :: brvindx(:),rvsz(:), bsdindx(:),sdsz(:)
integer(psb_ipk_) :: debug_level, debug_unit
integer(psb_ipk_) :: ierr(5)
character(len=20) :: name, ch_err
name='psb_zcdbldext'
info = psb_success_
if (psb_errstatus_fatal()) return
call psb_erractionsave(err_act)
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
if (.not.desc_a%is_ok()) then
info = psb_err_invalid_cd_state_
call psb_errpush(info,name)
goto 9999
end if
ctxt = desc_a%get_context()
icomm = desc_a%get_mpic()
Call psb_info(ctxt, me, np)
If (debug_level >= psb_debug_outer_) &
& Write(debug_unit,*) me,' ',trim(name),&
& ': start',novr
if (present(extype)) then
extype_ = extype
else
extype_ = psb_ovt_xhal_
endif
m = desc_a%get_local_rows()
n_row = desc_a%get_local_rows()
n_col = desc_a%get_local_cols()
nhalo = n_col-m
if (novr<0) then
info=psb_err_iarg_neg_
ierr(1)=1; ierr(2)=novr
call psb_errpush(info,name,i_err=ierr)
goto 9999
endif
select case(extype_)
case(psb_ovt_xhal_,psb_ovt_asov_)
case default
ierr(1)=5; ierr(2)=extype_
call psb_errpush(psb_err_input_value_invalid_i_,&
& name,i_err=ierr)
goto 9999
end select
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& ': Calling desccpy'
call desc_a%clone(desc_ov,info)
if (psb_errstatus_fatal()) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='psb_cdcpy')
goto 9999
end if
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& ': From desccpy'
if ((novr == 0).or.(np==1)) then
!
! Just copy the input.
! Should we return also when is_repl() ?
!
return
endif
if ((extype_ == psb_ovt_asov_).and.&
& (.not.desc_ov%indxmap%row_extendable())) then
! Need to switch to a format that can support overlap,
! so far: LIST or HASH. Encapsulate choice
! in a separate method.
call psb_cd_switch_ovl_indxmap(desc_ov,info)
if (info == 0) call psb_cd_set_ovl_bld(desc_ov,info)
else
call psb_cd_set_bld(desc_ov,info)
end if
if (info /= 0) goto 9999
If (debug_level >= psb_debug_outer_)then
Write(debug_unit,*) me,' ',trim(name),&
& ': BEGIN ',nhalo, desc_ov%indxmap%get_state()
call psb_barrier(ctxt)
endif
!
! Ok, since we are only estimating, do it as follows:
! LOVR= (NNZ/NROW)*N_HALO*NOVR This assumes that the local average
! nonzeros per row is the same as the global.
!
! Allow for empty matrices.
nztot = max(ione,a%get_nzeros())
if (nztot>0) then
lovr = ((nztot+m-1)/m)*nhalo*novr
lworks = ((nztot+m-1)/m)*nhalo
lworkr = ((nztot+m-1)/m)*nhalo
endif
If (debug_level >= psb_debug_outer_)&
& Write(debug_unit,*) me,' ',trim(name),':ovr_est done',novr,lovr
index_dim = max(desc_a%v_halo_index%get_nrows(),1_psb_ipk_)
elem_dim = index_dim
l_tmp_ovr_idx = novr*(3*Max(2*index_dim,1)+1)
l_tmp_halo = novr*(3*index_dim)
desc_ov%base_desc => desc_a
If (debug_level >= psb_debug_outer_) then
Write(debug_unit,*) me,' ',trim(name),':Start',&
& lworks,lworkr, desc_ov%indxmap%get_state()
call psb_barrier(ctxt)
endif
Allocate(brvindx(np+1),rvsz(np),sdsz(np),bsdindx(np+1),stat=info)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='Allocate')
goto 9999
end if
Allocate(works(lworks),workr(lworkr),t_halo_in(l_tmp_halo),&
& t_halo_out(l_tmp_halo), temp(lworkr),stat=info)
if (info == psb_success_) allocate(orig_ovr(l_tmp_ovr_idx),&
& tmp_ovr_idx(l_tmp_ovr_idx), &
& tmp_halo(l_tmp_halo),stat=info)
if (info /= psb_success_) then
call psb_errpush(psb_err_alloc_dealloc_,name)
goto 9999
end if
halo = desc_a%v_halo_index%get_vect()
if (.not.allocated(halo)) halo = (/ -ione /)
ovrlap = desc_a%v_ovrlap_index%get_vect()
if (.not.allocated(ovrlap)) ovrlap = (/ -ione /)
tmp_ovr_idx(:) = -1
orig_ovr(:) = -1
tmp_halo(:) = -1
counter_e = 1
tot_recv = 0
counter_t = 1
counter_h = 1
counter_o = 1
cntov_o = 1
! Init overlap with desc_a%ovrlap (if any)
counter = 1
Do While (ovrlap(counter) /= -1)
proc = ovrlap(counter+psb_proc_id_)
n_elem_recv = ovrlap(counter+psb_n_elem_recv_)
n_elem_send = ovrlap(counter+n_elem_recv+psb_n_elem_send_)
Do j=0,n_elem_recv-1
idx = ovrlap(counter+psb_elem_recv_+j)
call psb_ensure_size((cntov_o+3),orig_ovr,info,pad=-ione)
if (info /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='psb_ensure_size')
goto 9999
end if
orig_ovr(cntov_o) = proc
orig_ovr(cntov_o+1) = 1
orig_ovr(cntov_o+2) = idx
orig_ovr(cntov_o+3) = -1
cntov_o=cntov_o+3
end Do
counter = counter+n_elem_recv+n_elem_send+3
end Do
!
! A picture is in order to understand what goes on here.
! I is the internal part; H is halo, R row, C column. The final
! matrix with N levels of overlap looks like this
!
! I | Hc1 | 0 | 0 |
! -------|-----|-----|-----|
! Hr1 | Hd1 | Hc2 | 0 |
! -------|-----|-----|-----|
! 0 | Hr2 | Hd2 | Hc2 |
! -------|-----|-----|-----|
! 0 | 0 | Hr3 | Hd3 | Hc3
!
! At the start we already have I and Hc1, so we know the row
! indices that will make up Hr1, and also who owns them. As we
! actually get those rows, we receive the column indices in Hc2;
! these define the row indices for Hr2, and so on. When we have
! reached the desired level HrN.
!
!
Do i_ovr = 1, novr
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& ':Running on overlap level ',i_ovr,' of ',novr
!
! At this point, halo contains a valid halo corresponding to the
! matrix enlarged with the elements in the frontier for I_OVR-1.
! At the start, this is just the halo for A; the rows for indices in
! the first halo will contain column indices defining the second halo
! level and so on.
!
bsdindx(:) = 0
sdsz(:) = 0
brvindx(:) = 0
rvsz(:) = 0
idxr = 0
idxs = 0
counter = 1
counter_t = 1
n_col_prev = desc_ov%get_local_cols()
Do While (halo(counter) /= -1)
tot_elem = 0
proc = halo(counter+psb_proc_id_)
n_elem_recv = halo(counter+psb_n_elem_recv_)
n_elem_send = halo(counter+n_elem_recv+psb_n_elem_send_)
If ((counter+n_elem_recv+n_elem_send) > Size(halo)) then
info = -1
call psb_errpush(info,name)
goto 9999
end If
tot_recv = tot_recv+n_elem_recv
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& ': tot_recv:',proc,n_elem_recv,tot_recv
!
!
! The format of the halo vector exists in two forms: 1. Temporary
! 2. Assembled. In this loop we are using the (assembled) halo_in and
! copying it into (temporary) halo_out; this is because tmp_halo will
! be enlarged with the new column indices received, and will reassemble
! everything for the next iteration.
!
!
! add recv elements in halo_index into ovrlap_index
!
Do j=0,n_elem_recv-1
If ((counter+psb_elem_recv_+j)>Size(halo)) then
info=-2
call psb_errpush(info,name)
goto 9999
end If
idx = halo(counter+psb_elem_recv_+j)
call psb_ensure_size((counter_o+3),tmp_ovr_idx,info,pad=-ione)
if (info /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='psb_ensure_size')
goto 9999
end if
tmp_ovr_idx(counter_o) = proc
tmp_ovr_idx(counter_o+1) = 1
tmp_ovr_idx(counter_o+2) = idx
tmp_ovr_idx(counter_o+3) = -1
counter_o=counter_o+3
call psb_ensure_size((counter_h+3),tmp_halo,info,pad=-ione)
if (info /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='psb_ensure_size')
goto 9999
end if
tmp_halo(counter_h) = proc
tmp_halo(counter_h+1) = 1
tmp_halo(counter_h+2) = idx
tmp_halo(counter_h+3) = -1
counter_h=counter_h+3
Enddo
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& ':Checktmp_o_i Loop Mid1',tmp_ovr_idx(1:10)
counter = counter+n_elem_recv
!
! add send elements in halo_index into ovrlap_index
!
Do j=0,n_elem_send-1
idx = halo(counter+psb_elem_send_+j)
call psb_ensure_size((counter_o+3),tmp_ovr_idx,info,pad=-ione)
if (info /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='psb_ensure_size')
goto 9999
end if
tmp_ovr_idx(counter_o) = proc
tmp_ovr_idx(counter_o+1) = 1
tmp_ovr_idx(counter_o+2) = idx
tmp_ovr_idx(counter_o+3) = -1
counter_o=counter_o+3
!
! Prepare to exchange the halo rows with the other proc.
!
If (i_ovr <= (novr)) Then
call a%csget(idx,idx,n_elem,irow,icol,info)
if (info /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='csget')
goto 9999
end if
call psb_ensure_size((idxs+tot_elem+n_elem),works,info)
if (info /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='psb_ensure_size')
goto 9999
end if
call desc_ov%l2g(icol(1:n_elem),&
& works(idxs+tot_elem+1:idxs+tot_elem+n_elem),&
& info)
tot_elem=tot_elem+n_elem
End If
Enddo
if (i_ovr <= novr) then
if (tot_elem > 1) then
call psb_msort_unique(works(idxs+1:idxs+tot_elem),lnz)
tot_elem = lnz
endif
sdsz(proc+1) = tot_elem
idxs = idxs + tot_elem
end if
counter = counter+n_elem_send+3
Enddo
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& ':End phase 1', m, n_col, tot_recv
if (i_ovr <= novr) then
!
! Exchange data requests with everybody else: so far we have
! accumulated RECV requests, we have an all-to-all to build
! matchings SENDs.
!
call mpi_alltoall(sdsz,1,psb_mpi_mpk_,rvsz,1, &
& psb_mpi_mpk_,icomm,minfo)
if (minfo /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='mpi_alltoall')
goto 9999
end if
idxs = 0
idxr = 0
counter = 1
Do
proc=halo(counter)
if (proc == -1) exit
n_elem_recv = halo(counter+psb_n_elem_recv_)
counter = counter+n_elem_recv
n_elem_send = halo(counter+psb_n_elem_send_)
bsdindx(proc+1) = idxs
idxs = idxs + sdsz(proc+1)
brvindx(proc+1) = idxr
idxr = idxr + rvsz(proc+1)
counter = counter+n_elem_send+3
Enddo
iszr=sum(rvsz)
if (max(iszr,1) > lworkr) then
call psb_realloc(max(iszr,1),workr,info)
if (psb_errstatus_fatal()) then
info=psb_err_alloc_dealloc_
call psb_errpush(info,name)
goto 9999
end if
lworkr = max(iszr,1)
end if
call mpi_alltoallv(works,sdsz,bsdindx,psb_mpi_lpk_,&
& workr,rvsz,brvindx,psb_mpi_lpk_,icomm,minfo)
if (minfo /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='mpi_alltoallv')
goto 9999
end if
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),': ISZR :',iszr
call psb_ensure_size(iszr,maskr,info)
if (info /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='psb_ensure_size')
goto 9999
end if
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& ': going for first idx_cnv', desc_ov%indxmap%get_state()
call desc_ov%indxmap%g2l(workr(1:iszr),maskr(1:iszr),info)
iszs = count(maskr(1:iszr)<=0)
if (iszs > size(works)) call psb_realloc(iszs,works,info)
j = 0
do i=1,iszr
if (maskr(i) < 0) then
j = j+1
works(j) = workr(i)
end if
end do
! Eliminate duplicates from request
call psb_msort_unique(works(1:j),lnz)
iszs = lnz
!
! fnd_owner on desc_a because we want the procs who
! owned the rows from the beginning!
!
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& ': going for fnd_owner', desc_ov%indxmap%get_state()
call desc_a%fnd_owner(works(1:iszs),temp,info)
n_col = desc_ov%get_local_cols()
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& ': Done fnd_owner', desc_ov%indxmap%get_state()
do i=1,iszs
gidx = works(i)
n_col = desc_ov%get_local_cols()
call desc_ov%indxmap%g2l_ins(gidx,lidx,info)
if (desc_ov%get_local_cols() > n_col ) then
!
! This is a new index. Assigning a local index as
! we receive them guarantees that all indices for HALO(I)
! will be less than those for HALO(J) whenever I<J
!
proc_id = temp(i)
call psb_ensure_size((counter_t+3),t_halo_in,info,pad=-ione)
if (info /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='psb_ensure_size')
goto 9999
end if
t_halo_in(counter_t) = proc_id
t_halo_in(counter_t+1) = 1
t_halo_in(counter_t+2) = lidx
t_halo_in(counter_t+3) = -1
counter_t = counter_t+3
endif
end Do
n_col = desc_ov%get_local_cols()
end if
!
! Ok, now we have a temporary halo with all the info for the
! next round. If we need to keep going, convert the halo format
! from temporary to final, so that we can work out the next iteration.
! This uses one of the convert_comm internals, i.e. we are doing
! the equivalent of a partial call to convert_comm
!
t_halo_in(counter_t)=-1
If (i_ovr < (novr)) Then
if (debug_level >= psb_debug_outer_) then
write(debug_unit,*) me,' ',trim(name),':Checktmp_o_i 1',tmp_ovr_idx(1:10)
write(debug_unit,*) me,' ',trim(name),':Calling Crea_index'
end if
call psi_crea_index(desc_ov,t_halo_in,t_halo_out,&
& nxch,nsnd,nrcv,info)
if (debug_level >= psb_debug_outer_) then
write(debug_unit,*) me,' ',trim(name),':Done Crea_Index'
call psb_barrier(ctxt)
end if
call psb_move_alloc(t_halo_out,halo,info)
!
! At this point we have built the halo necessary for I_OVR+1.
!
End If
End Do
select case(extype_)
case(psb_ovt_xhal_)
!
! Build an extended-stencil halo, but no overlap enlargement.
! Here we need: 1. orig_ovr -> ovrlap
! 2. (tmp_halo + t_halo_in) -> halo
! 3. (t_ovr_idx) -> /dev/null
! 4. n_row(ov) = n_row(a)
! 5. n_col(ov) current.
!
call psb_move_alloc(orig_ovr,desc_ov%ovrlap_index,info)
call psb_ensure_size((counter_h+counter_t+1),tmp_halo,info,pad=-ione)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='psb_ensure_size')
goto 9999
end if
tmp_halo(counter_h:counter_h+counter_t-1) = t_halo_in(1:counter_t)
counter_h = counter_h+counter_t-1
tmp_halo(counter_h:) = -1
call psb_move_alloc(tmp_halo,desc_ov%halo_index,info)
deallocate(tmp_ovr_idx,stat=info)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='deallocate')
goto 9999
end if
case(psb_ovt_asov_)
!
! Build an overlapped descriptor for Additive Schwarz
! with overlap enlargement; we need the overlap,
! the (new) halo and the mapping into the new index space.
! Here we need: 1. (orig_ovr + t_ovr_idx) -> ovrlap
! 2. (tmp_halo) -> ext
! 3. (t_halo_in) -> halo
! 4. n_row(ov) current.
! 5. n_col(ov) current.
!
call desc_ov%indxmap%set_lr(n_col_prev)
call psb_ensure_size((cntov_o+counter_o+1),orig_ovr,info,pad=-ione)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='psb_ensure_size')
goto 9999
end if
orig_ovr(cntov_o:cntov_o+counter_o-1) = tmp_ovr_idx(1:counter_o)
cntov_o = cntov_o+counter_o-1
orig_ovr(cntov_o:) = -1
call psb_move_alloc(orig_ovr,desc_ov%ovrlap_index,info)
deallocate(tmp_ovr_idx,stat=info)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='deallocate')
goto 9999
end if
tmp_halo(counter_h:) = -1
call psb_move_alloc(tmp_halo,desc_ov%ext_index,info)
call psb_move_alloc(t_halo_in,desc_ov%halo_index,info)
case default
ierr(1)=5; ierr(2)=extype_
call psb_errpush(psb_err_input_value_invalid_i_,name,i_err=ierr)
goto 9999
end select
!
! At this point we have gathered all the indices in the halo at
! N levels of overlap. Just call icdasb forcing to use
! the halo_index provided. This is the same routine as gets
! called inside CDASB.
!
if (debug_level >= psb_debug_outer_) then
write(debug_unit,*) me,' ',trim(name),': converting indexes'
call psb_barrier(ctxt)
end if
call psb_icdasb(desc_ov,info,ext_hv=.true.)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='icdasdb')
goto 9999
end if
call psb_cd_set_ovl_asb(desc_ov,info)
if (info == psb_success_) then
if (allocated(irow)) deallocate(irow,stat=info)
if ((info == psb_success_).and.allocated(icol)) &
& deallocate(icol,stat=info)
if (info /= psb_success_) then
ierr(1) = info
call psb_errpush(psb_err_from_subroutine_ai_,name, &
& a_err='deallocate',i_err=ierr)
goto 9999
end if
end if
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),': end'
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(ctxt,err_act)
return
End Subroutine psb_zcdbldext