Added igather/iscatter.
Salvatore Filippone
18 years ago
parent
3e773d97ad
commit
927575a4a1
@ -0,0 +1,326 @@
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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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! File: psb_igather.f90
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!
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! Subroutine: psb_igatherm
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! This subroutine gathers pieces of a distributed dense matrix into a local one.
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!
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! Parameters:
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! globx - integer,dimension(:,:). The local matrix into which gather
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! the distributed pieces.
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! locx - integer,dimension(:,:). The local piece of the distributed
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! matrix to be gathered.
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! desc_a - type(<psb_desc_type>). The communication descriptor.
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! info - integer. Error code.
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! iroot - integer. The process that has to own the
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! global matrix. If -1 all
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! the processes will have a copy.
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! Default: -1.
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!
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subroutine psb_igatherm(globx, locx, desc_a, info, iroot)
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use psb_descriptor_type
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use psb_check_mod
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use psb_error_mod
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use psb_penv_mod
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implicit none
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integer, intent(in) :: locx(:,:)
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integer, intent(out) :: globx(:,:)
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type(psb_desc_type), intent(in) :: desc_a
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integer, intent(out) :: info
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integer, intent(in), optional :: iroot
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! locals
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integer :: int_err(5), ictxt, np, me,&
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& err_act, n, root, iiroot, ilocx, iglobx, jlocx,&
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& jglobx, lda_locx, lda_globx, m, lock, globk, maxk, k, jlx, ilx, i, j, idx
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character(len=20) :: name, ch_err
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name='psb_igatherm'
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if(psb_get_errstatus().ne.0) return
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info=0
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call psb_erractionsave(err_act)
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ictxt=psb_cd_get_context(desc_a)
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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 (present(iroot)) then
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root = iroot
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if((root.lt.-1).or.(root.gt.np)) then
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info=30
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int_err(1:2)=(/5,root/)
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call psb_errpush(info,name,i_err=int_err)
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goto 9999
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end if
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else
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root = -1
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end if
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if (root==-1) then
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iiroot=0
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else
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iiroot = root
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endif
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iglobx = 1
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jglobx = 1
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ilocx = 1
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jlocx = 1
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lda_globx = size(globx,1)
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lda_locx = size(locx, 1)
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m = psb_cd_get_global_rows(desc_a)
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n = psb_cd_get_global_cols(desc_a)
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lock=size(locx,2)-jlocx+1
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globk=size(globx,2)-jglobx+1
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maxk=min(lock,globk)
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k = maxk
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call psb_bcast(ictxt,k,root=iiroot)
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! there should be a global check on k here!!!
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call psb_chkglobvect(m,n,size(globx,1),iglobx,jglobx,desc_a,info)
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call psb_chkvect(m,n,size(locx,1),ilocx,jlocx,desc_a,info,ilx,jlx)
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if(info.ne.0) then
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info=4010
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ch_err='psb_chk(glob)vect'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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if ((ilx.ne.1).or.(iglobx.ne.1)) then
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info=3040
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call psb_errpush(info,name)
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goto 9999
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end if
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globx(:,:)=0
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do j=1,k
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do i=1,psb_cd_get_local_rows(desc_a)
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idx = desc_a%loc_to_glob(i)
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globx(idx,jglobx+j-1) = locx(i,jlx+j-1)
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end do
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! adjust overlapped elements
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i=1
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do while (desc_a%ovrlap_elem(i).ne.-1)
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idx=desc_a%ovrlap_elem(i+psb_ovrlp_elem_)
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idx=desc_a%loc_to_glob(idx)
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globx(idx,jglobx+j-1) = &
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& globx(idx,jglobx+j-1)/desc_a%ovrlap_elem(i+psb_n_dom_ovr_)
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i=i+2
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end do
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end do
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call psb_sum(ictxt,globx(1:m,jglobx:jglobx+k-1),root=root)
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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.psb_act_abort_) then
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call psb_error(ictxt)
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return
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end if
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return
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end subroutine psb_igatherm
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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
|
||||||
|
!!$ notice, this list of conditions and the following disclaimer.
|
||||||
|
!!$ 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
|
||||||
|
!!$ 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
|
||||||
|
!!$ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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||||||
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!!$ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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||||||
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!!$ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||||
|
!!$ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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||||||
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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: psb_igatherv
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! This subroutine gathers pieces of a distributed dense vector into a local one.
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!
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! Parameters:
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! globx - integer,dimension(:). The local vector into which gather the
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! distributed pieces.
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! locx - integer,dimension(:). The local piece of the ditributed
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! vector to be gathered.
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! desc_a - type(<psb_desc_type>). The communication descriptor.
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! info - integer. Error code.
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! iroot - integer. The process that has to own the
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! global matrix. If -1 all
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! the processes will have a copy.
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!
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subroutine psb_igatherv(globx, locx, desc_a, info, iroot)
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use psb_descriptor_type
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use psb_check_mod
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use psb_error_mod
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use psb_penv_mod
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implicit none
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integer, intent(in) :: locx(:)
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integer, intent(out) :: globx(:)
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type(psb_desc_type), intent(in) :: desc_a
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integer, intent(out) :: info
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integer, intent(in), optional :: iroot
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! locals
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integer :: int_err(5), ictxt, np, me, &
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& err_act, n, root, ilocx, iglobx, jlocx,&
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& jglobx, lda_locx, lda_globx, m, k, jlx, ilx, i, idx
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character(len=20) :: name, ch_err
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name='psb_igatherv'
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if(psb_get_errstatus().ne.0) return
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info=0
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call psb_erractionsave(err_act)
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ictxt=psb_cd_get_context(desc_a)
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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 (present(iroot)) then
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root = iroot
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if((root.lt.-1).or.(root.gt.np)) then
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info=30
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int_err(1:2)=(/5,root/)
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call psb_errpush(info,name,i_err=int_err)
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goto 9999
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end if
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else
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root = -1
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end if
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jglobx=1
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iglobx = 1
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jlocx=1
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ilocx = 1
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lda_globx = size(globx)
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lda_locx = size(locx)
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m = psb_cd_get_global_rows(desc_a)
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n = psb_cd_get_global_cols(desc_a)
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k = 1
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! there should be a global check on k here!!!
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call psb_chkglobvect(m,n,size(globx),iglobx,jglobx,desc_a,info)
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call psb_chkvect(m,n,size(locx),ilocx,jlocx,desc_a,info,ilx,jlx)
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if(info.ne.0) then
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info=4010
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ch_err='psb_chk(glob)vect'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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if ((ilx.ne.1).or.(iglobx.ne.1)) then
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info=3040
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call psb_errpush(info,name)
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goto 9999
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end if
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globx(:)=0
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do i=1,psb_cd_get_local_rows(desc_a)
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idx = desc_a%loc_to_glob(i)
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globx(idx) = locx(i)
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end do
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! adjust overlapped elements
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i=1
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do while (desc_a%ovrlap_elem(i).ne.-1)
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idx=desc_a%ovrlap_elem(i+psb_ovrlp_elem_)
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idx=desc_a%loc_to_glob(idx)
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globx(idx) = globx(idx)/desc_a%ovrlap_elem(i+psb_n_dom_ovr_)
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i=i+2
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end do
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call psb_sum(ictxt,globx(1:m),root=root)
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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.psb_act_abort_) then
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call psb_error(ictxt)
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return
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end if
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return
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end subroutine psb_igatherv
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@ -0,0 +1,416 @@
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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
|
||||||
|
!!$ Alfredo Buttari University of Rome Tor Vergata
|
||||||
|
!!$
|
||||||
|
!!$ 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.
|
||||||
|
!!$
|
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|
!!$
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! File: psb_iscatter.f90
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!
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! Subroutine: psb_iscatterm
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! This subroutine scatters a global matrix locally owned by one process
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! into pieces that are local to alle the processes.
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!
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! Parameters:
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! globx - integer,dimension(:,:). The global matrix to scatter.
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! locx - integer,dimension(:,:). The local piece of the ditributed matrix.
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! desc_a - type(<psb_desc_type>). The communication descriptor.
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! info - integer. Error code.
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! iroot - integer(optional). The process that owns the global matrix. If -1 all
|
||||||
|
! the processes have a copy.
|
||||||
|
!
|
||||||
|
subroutine psb_iscatterm(globx, locx, desc_a, info, iroot)
|
||||||
|
|
||||||
|
use psb_descriptor_type
|
||||||
|
use psb_check_mod
|
||||||
|
use psb_error_mod
|
||||||
|
use mpi
|
||||||
|
use psb_penv_mod
|
||||||
|
implicit none
|
||||||
|
|
||||||
|
integer, intent(out) :: locx(:,:)
|
||||||
|
integer, intent(in) :: globx(:,:)
|
||||||
|
type(psb_desc_type), intent(in) :: desc_a
|
||||||
|
integer, intent(out) :: info
|
||||||
|
integer, intent(in), optional :: iroot
|
||||||
|
|
||||||
|
! locals
|
||||||
|
integer :: int_err(5), ictxt, np, me,&
|
||||||
|
& err_act, m, n, i, j, idx, nrow, iiroot, iglobx, jglobx,&
|
||||||
|
& ilocx, jlocx, lda_locx, lda_globx, lock, globk, icomm, k, maxk, root, ilx,&
|
||||||
|
& jlx, myrank, rootrank, c, pos
|
||||||
|
integer, allocatable :: scatterv(:)
|
||||||
|
integer, allocatable :: displ(:), l_t_g_all(:), all_dim(:)
|
||||||
|
character(len=20) :: name, ch_err
|
||||||
|
|
||||||
|
name='psb_scatterm'
|
||||||
|
if(psb_get_errstatus() /= 0) return
|
||||||
|
info=0
|
||||||
|
call psb_erractionsave(err_act)
|
||||||
|
|
||||||
|
ictxt=psb_cd_get_context(desc_a)
|
||||||
|
|
||||||
|
! check on blacs grid
|
||||||
|
call psb_info(ictxt, me, np)
|
||||||
|
if (np == -1) then
|
||||||
|
info = 2010
|
||||||
|
call psb_errpush(info,name)
|
||||||
|
goto 9999
|
||||||
|
endif
|
||||||
|
|
||||||
|
if (present(iroot)) then
|
||||||
|
root = iroot
|
||||||
|
if((root.lt.-1).or.(root.gt.np)) then
|
||||||
|
info=30
|
||||||
|
int_err(1:2)=(/5,root/)
|
||||||
|
call psb_errpush(info,name,i_err=int_err)
|
||||||
|
goto 9999
|
||||||
|
end if
|
||||||
|
else
|
||||||
|
root = -1
|
||||||
|
end if
|
||||||
|
if (root==-1) then
|
||||||
|
iiroot=0
|
||||||
|
endif
|
||||||
|
|
||||||
|
iglobx = 1
|
||||||
|
jglobx = 1
|
||||||
|
ilocx = 1
|
||||||
|
jlocx = 1
|
||||||
|
lda_globx = size(globx,1)
|
||||||
|
lda_locx = size(locx, 1)
|
||||||
|
|
||||||
|
m = psb_cd_get_global_rows(desc_a)
|
||||||
|
n = psb_cd_get_global_cols(desc_a)
|
||||||
|
|
||||||
|
lock=size(locx,2)-jlocx+1
|
||||||
|
globk=size(globx,2)-jglobx+1
|
||||||
|
maxk=min(lock,globk)
|
||||||
|
k = maxk
|
||||||
|
call psb_get_mpicomm(ictxt,icomm)
|
||||||
|
call psb_get_rank(myrank,ictxt,me)
|
||||||
|
|
||||||
|
|
||||||
|
lda_globx = size(globx)
|
||||||
|
lda_locx = size(locx)
|
||||||
|
|
||||||
|
m = psb_cd_get_global_rows(desc_a)
|
||||||
|
n = psb_cd_get_global_cols(desc_a)
|
||||||
|
|
||||||
|
if (me == iiroot) then
|
||||||
|
call igebs2d(ictxt, 'all', ' ', 1, 1, k, 1)
|
||||||
|
else
|
||||||
|
call igebr2d(ictxt, 'all', ' ', 1, 1, k, 1, iiroot, 0)
|
||||||
|
end if
|
||||||
|
|
||||||
|
! there should be a global check on k here!!!
|
||||||
|
|
||||||
|
call psb_chkglobvect(m,n,size(globx),iglobx,jglobx,desc_a,info)
|
||||||
|
if (info == 0) call psb_chkvect(m,n,size(locx),ilocx,jlocx,desc_a,info,ilx,jlx)
|
||||||
|
if(info /= 0) then
|
||||||
|
info=4010
|
||||||
|
ch_err='psb_chk(glob)vect'
|
||||||
|
call psb_errpush(info,name,a_err=ch_err)
|
||||||
|
goto 9999
|
||||||
|
end if
|
||||||
|
|
||||||
|
if ((ilx /= 1).or.(iglobx /= 1)) then
|
||||||
|
info=3040
|
||||||
|
call psb_errpush(info,name)
|
||||||
|
goto 9999
|
||||||
|
end if
|
||||||
|
|
||||||
|
nrow=psb_cd_get_local_rows(desc_a)
|
||||||
|
|
||||||
|
if(root == -1) then
|
||||||
|
! extract my chunk
|
||||||
|
do j=1,k
|
||||||
|
do i=1, nrow
|
||||||
|
idx=desc_a%loc_to_glob(i)
|
||||||
|
locx(i,jlocx+j-1)=globx(idx,jglobx+j-1)
|
||||||
|
end do
|
||||||
|
end do
|
||||||
|
else
|
||||||
|
call psb_get_rank(rootrank,ictxt,root)
|
||||||
|
end if
|
||||||
|
|
||||||
|
! root has to gather size information
|
||||||
|
allocate(displ(np),all_dim(np),stat=info)
|
||||||
|
if(info /= 0) then
|
||||||
|
info=4010
|
||||||
|
ch_err='Allocate'
|
||||||
|
call psb_errpush(info,name,a_err=ch_err)
|
||||||
|
goto 9999
|
||||||
|
end if
|
||||||
|
call mpi_gather(nrow,1,mpi_integer,all_dim,&
|
||||||
|
& np,mpi_integer,rootrank,icomm,info)
|
||||||
|
|
||||||
|
displ(1)=1
|
||||||
|
displ(2:)=all_dim(1:np-1)+1
|
||||||
|
|
||||||
|
! root has to gather loc_glob from each process
|
||||||
|
if(me == root) then
|
||||||
|
allocate(l_t_g_all(sum(all_dim)),scatterv(sum(all_dim)),stat=info)
|
||||||
|
if(info /= 0) then
|
||||||
|
info=4010
|
||||||
|
ch_err='Allocate'
|
||||||
|
call psb_errpush(info,name,a_err=ch_err)
|
||||||
|
goto 9999
|
||||||
|
end if
|
||||||
|
|
||||||
|
end if
|
||||||
|
|
||||||
|
call mpi_gatherv(desc_a%loc_to_glob,nrow,&
|
||||||
|
& mpi_integer,l_t_g_all,all_dim,&
|
||||||
|
& displ,mpi_integer,rootrank,icomm,info)
|
||||||
|
|
||||||
|
|
||||||
|
do c=1, k
|
||||||
|
! prepare vector to scatter
|
||||||
|
if(me == root) then
|
||||||
|
do i=1,np
|
||||||
|
pos=displ(i)
|
||||||
|
do j=1, all_dim(i)
|
||||||
|
idx=l_t_g_all(pos+j-1)
|
||||||
|
scatterv(pos+j-1)=globx(idx,jglobx+c-1)
|
||||||
|
end do
|
||||||
|
end do
|
||||||
|
end if
|
||||||
|
|
||||||
|
! scatter !!!
|
||||||
|
call mpi_scatterv(scatterv,all_dim,displ,&
|
||||||
|
& mpi_integer,locx(1,jlocx+c-1),nrow,&
|
||||||
|
& mpi_integer,rootrank,icomm,info)
|
||||||
|
|
||||||
|
end do
|
||||||
|
|
||||||
|
deallocate(all_dim, l_t_g_all, displ, scatterv)
|
||||||
|
|
||||||
|
call psb_erractionrestore(err_act)
|
||||||
|
return
|
||||||
|
|
||||||
|
9999 continue
|
||||||
|
call psb_erractionrestore(err_act)
|
||||||
|
|
||||||
|
if (err_act == psb_act_abort_) then
|
||||||
|
call psb_error(ictxt)
|
||||||
|
return
|
||||||
|
end if
|
||||||
|
return
|
||||||
|
|
||||||
|
end subroutine psb_iscatterm
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
!!$
|
||||||
|
!!$ Parallel Sparse BLAS v2.0
|
||||||
|
!!$ (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata
|
||||||
|
!!$ Alfredo Buttari University of Rome Tor Vergata
|
||||||
|
!!$
|
||||||
|
!!$ 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.
|
||||||
|
!!$
|
||||||
|
!!$
|
||||||
|
|
||||||
|
! Subroutine: psb_iscatterv
|
||||||
|
! This subroutine scatters a global vector locally owned by one process
|
||||||
|
! into pieces that are local to alle the processes.
|
||||||
|
!
|
||||||
|
! Parameters:
|
||||||
|
! globx - integer,dimension(:). The global vector to scatter.
|
||||||
|
! locx - integer,dimension(:). The local piece of the ditributed vector.
|
||||||
|
! desc_a - type(<psb_desc_type>). The communication descriptor.
|
||||||
|
! info - integer. Error code.
|
||||||
|
! iroot - integer(optional). The process that owns the global vector. If -1 all
|
||||||
|
! the processes have a copy.
|
||||||
|
!
|
||||||
|
subroutine psb_iscatterv(globx, locx, desc_a, info, iroot)
|
||||||
|
use psb_descriptor_type
|
||||||
|
use psb_check_mod
|
||||||
|
use psb_error_mod
|
||||||
|
use mpi
|
||||||
|
use psb_penv_mod
|
||||||
|
implicit none
|
||||||
|
|
||||||
|
integer, intent(out) :: locx(:)
|
||||||
|
integer, intent(in) :: globx(:)
|
||||||
|
type(psb_desc_type), intent(in) :: desc_a
|
||||||
|
integer, intent(out) :: info
|
||||||
|
integer, intent(in), optional :: iroot
|
||||||
|
|
||||||
|
|
||||||
|
! locals
|
||||||
|
integer :: int_err(5), ictxt, np, me, &
|
||||||
|
& err_act, m, n, i, j, idx, nrow, iiroot, iglobx, jglobx,&
|
||||||
|
& ilocx, jlocx, lda_locx, lda_globx, root, k, icomm, myrank,&
|
||||||
|
& rootrank, pos, ilx, jlx
|
||||||
|
integer, allocatable :: scatterv(:)
|
||||||
|
integer, allocatable :: displ(:), l_t_g_all(:), all_dim(:)
|
||||||
|
character(len=20) :: name, ch_err
|
||||||
|
|
||||||
|
name='psb_scatterv'
|
||||||
|
if(psb_get_errstatus() /= 0) return
|
||||||
|
info=0
|
||||||
|
call psb_erractionsave(err_act)
|
||||||
|
|
||||||
|
ictxt=psb_cd_get_context(desc_a)
|
||||||
|
|
||||||
|
! check on blacs grid
|
||||||
|
call psb_info(ictxt, me, np)
|
||||||
|
if (np == -1) then
|
||||||
|
info = 2010
|
||||||
|
call psb_errpush(info,name)
|
||||||
|
goto 9999
|
||||||
|
endif
|
||||||
|
|
||||||
|
if (present(iroot)) then
|
||||||
|
root = iroot
|
||||||
|
if((root.lt.-1).or.(root.gt.np)) then
|
||||||
|
info=30
|
||||||
|
int_err(1:2)=(/5,root/)
|
||||||
|
call psb_errpush(info,name,i_err=int_err)
|
||||||
|
goto 9999
|
||||||
|
end if
|
||||||
|
else
|
||||||
|
root = -1
|
||||||
|
end if
|
||||||
|
|
||||||
|
call psb_get_mpicomm(ictxt,icomm)
|
||||||
|
call psb_get_rank(myrank,ictxt,me)
|
||||||
|
|
||||||
|
lda_globx = size(globx)
|
||||||
|
lda_locx = size(locx)
|
||||||
|
|
||||||
|
m = psb_cd_get_global_rows(desc_a)
|
||||||
|
n = psb_cd_get_global_cols(desc_a)
|
||||||
|
|
||||||
|
k = 1
|
||||||
|
|
||||||
|
if (me == iiroot) then
|
||||||
|
call igebs2d(ictxt, 'all', ' ', 1, 1, k, 1)
|
||||||
|
else
|
||||||
|
call igebr2d(ictxt, 'all', ' ', 1, 1, k, 1, iiroot, 0)
|
||||||
|
end if
|
||||||
|
|
||||||
|
! there should be a global check on k here!!!
|
||||||
|
|
||||||
|
call psb_chkglobvect(m,n,size(globx),iglobx,jglobx,desc_a,info)
|
||||||
|
if (info == 0) &
|
||||||
|
& call psb_chkvect(m,n,size(locx),ilocx,jlocx,desc_a,info,ilx,jlx)
|
||||||
|
if(info /= 0) then
|
||||||
|
info=4010
|
||||||
|
ch_err='psb_chk(glob)vect'
|
||||||
|
call psb_errpush(info,name,a_err=ch_err)
|
||||||
|
goto 9999
|
||||||
|
end if
|
||||||
|
|
||||||
|
if ((ilx /= 1).or.(iglobx /= 1)) then
|
||||||
|
info=3040
|
||||||
|
call psb_errpush(info,name)
|
||||||
|
goto 9999
|
||||||
|
end if
|
||||||
|
|
||||||
|
nrow=psb_cd_get_local_rows(desc_a)
|
||||||
|
|
||||||
|
if(root == -1) then
|
||||||
|
! extract my chunk
|
||||||
|
do i=1, nrow
|
||||||
|
idx=desc_a%loc_to_glob(i)
|
||||||
|
locx(i)=globx(idx)
|
||||||
|
end do
|
||||||
|
else
|
||||||
|
call psb_get_rank(rootrank,ictxt,root)
|
||||||
|
end if
|
||||||
|
|
||||||
|
! root has to gather size information
|
||||||
|
allocate(displ(np),all_dim(np))
|
||||||
|
call mpi_gather(nrow,1,mpi_integer,all_dim,&
|
||||||
|
& np,mpi_integer,rootrank,icomm,info)
|
||||||
|
|
||||||
|
displ(1)=1
|
||||||
|
displ(2:)=all_dim(1:np-1)+1
|
||||||
|
|
||||||
|
! root has to gather loc_glob from each process
|
||||||
|
if(me == root) then
|
||||||
|
allocate(l_t_g_all(sum(all_dim)),scatterv(sum(all_dim)))
|
||||||
|
end if
|
||||||
|
|
||||||
|
call mpi_gatherv(desc_a%loc_to_glob,nrow,&
|
||||||
|
& mpi_integer,l_t_g_all,all_dim,&
|
||||||
|
& displ,mpi_integer,rootrank,icomm,info)
|
||||||
|
|
||||||
|
! prepare vector to scatter
|
||||||
|
if(me == root) then
|
||||||
|
do i=1,np
|
||||||
|
pos=displ(i)
|
||||||
|
do j=1, all_dim(i)
|
||||||
|
idx=l_t_g_all(pos+j-1)
|
||||||
|
scatterv(pos+j-1)=globx(idx)
|
||||||
|
end do
|
||||||
|
end do
|
||||||
|
end if
|
||||||
|
|
||||||
|
call mpi_scatterv(scatterv,all_dim,displ,&
|
||||||
|
& mpi_integer,locx,nrow,&
|
||||||
|
& mpi_integer,rootrank,icomm,info)
|
||||||
|
|
||||||
|
deallocate(all_dim, l_t_g_all, displ, scatterv)
|
||||||
|
|
||||||
|
call psb_erractionrestore(err_act)
|
||||||
|
return
|
||||||
|
|
||||||
|
9999 continue
|
||||||
|
call psb_erractionrestore(err_act)
|
||||||
|
|
||||||
|
if (err_act == psb_act_abort_) then
|
||||||
|
call psb_error(ictxt)
|
||||||
|
return
|
||||||
|
end if
|
||||||
|
return
|
||||||
|
|
||||||
|
end subroutine psb_iscatterv
|
||||||
Loading…
Reference in New Issue