Find owner of indices.
Salvatore Filippone
18 years ago
parent
e705e76888
commit
385e449b61
@ -0,0 +1,143 @@
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!!$
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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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!!$
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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 PSBLAS 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 PSBLAS 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 psi_fnd_owner(nv,idx,iprc,desc,info)
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use psb_descriptor_type
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use psb_serial_mod
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use psb_const_mod
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use psb_error_mod
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use psb_penv_mod
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use psb_realloc_mod
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use psi_mod, only : psi_idx_cnv
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implicit none
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integer, intent(in) :: nv
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integer, intent(in) :: idx(:)
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integer, allocatable, intent(out) :: iprc(:)
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type(psb_desc_type), intent(in) :: desc
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integer, intent(out) :: info
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integer,allocatable :: hsz(:),hidx(:),helem(:),hproc(:)
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integer :: i,j,err,n_row,n_col, err_act,ih,nh,icomm,hsize
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integer :: ictxt,np,me
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logical, parameter :: debug=.false., debugwrt=.false.
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character(len=20) :: name,ch_err
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info = 0
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name = 'psi_fnd_owner'
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call psb_erractionsave(err_act)
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ictxt = psb_cd_get_context(desc)
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n_row = psb_cd_get_local_rows(desc)
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n_col = psb_cd_get_local_cols(desc)
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call psb_get_mpicomm(ictxt,icomm )
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! check on blacs grid
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call psb_info(ictxt, me, np)
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if (np == -1) then
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info = 2010
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call psb_errpush(info,name)
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goto 9999
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endif
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if (nv < 0 ) then
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info = 2010
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call psb_errpush(info,name)
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goto 9999
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endif
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if (.not.(psb_is_ok_desc(desc))) then
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write(0,*) 'Invalid input descriptor in psi_fnd_owner'
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end if
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Allocate(hidx(np+1),hsz(np),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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hsz = 0
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hsz(me+1) = nv
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call psb_amx(ictxt,hsz,info)
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hidx(1) = 1
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do i=1, np
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hidx(i+1) = hidx(i) + hsz(i)
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end do
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hsize = hidx(np+1)-1
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Allocate(helem(hsize),hproc(hsize),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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helem(:) = 0
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ih = hidx(me+1)
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do i=1, hsz(me+1)
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helem(ih+i-1) = idx(i)
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end do
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call psb_amx(ictxt,helem,info)
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call psi_idx_cnv(hsize,helem,desc,info,owned=.true.)
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if (info /= 0) then
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call psb_errpush(4010,name,a_err='psi_idx_cnv')
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goto 9999
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end if
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do i=1,hsize
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if ((0< helem(i)).and. (helem(i) <= n_row))then
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hproc(i) = me+1
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else
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hproc(i) = 0
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end if
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end do
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call psb_amx(ictxt,hproc,info)
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if (nv > 0) then
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call psb_realloc(nv,iprc,info)
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ih = hidx(me+1)
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do i=1, hsz(me+1)
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iprc(i) = hproc(ih+i-1) - 1
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end do
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end if
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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_erractionrestore(err_act)
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if (err_act.eq.act_ret) then
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return
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else
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call psb_error(ictxt)
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end if
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return
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end subroutine psi_fnd_owner
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