!!$ !!$ 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. !!$ !!$ ! File: psb_dgather.f90 ! ! Subroutine: psb_dgatherm ! This subroutine gathers pieces of a distributed dense matrix into a local one. ! ! Parameters: ! globx - real,dimension(:,:). The local matrix into which gather the distributed pieces. ! locx - real,dimension(:,:). The local piece of the ditributed matrix to be gathered. ! desc_a - type(). The communication descriptor. ! info - integer. Eventually returns an error code. ! iroot - integer. The process that has to own the global matrix. If -1 all ! the processes will have a copy. ! iiglobx - integer(optional). The starting row of the global matrix. ! ijglobx - integer(optional). The starting column of the global matrix. ! iilocx - integer(optional). The starting row of the local piece of matrix. ! ijlocx - integer(optional). The starting column of the local piece of matrix. ! ik - integer(optional). The number of columns to gather. ! subroutine psb_dgatherm(globx, locx, desc_a, info, iroot,& & iiglobx, ijglobx, iilocx,ijlocx,ik) use psb_descriptor_type use psb_check_mod use psb_error_mod implicit none real(kind(1.d0)), intent(in) :: locx(:,:) real(kind(1.d0)), intent(out) :: globx(:,:) type(psb_desc_type), intent(in) :: desc_a integer, intent(out) :: info integer, intent(in), optional :: iroot, iiglobx, ijglobx, iilocx, ijlocx, ik ! locals integer :: int_err(5), icontxt, nprow, npcol, myrow, mycol,& & err_act, n, iix, jjx, temp(2), root, iiroot, ilocx, iglobx, jlocx,& & jglobx, lda_locx, lda_globx, m, lock, globk, maxk, k, jlx, ilx, i, j, idx real(kind(1.d0)),pointer :: tmpx(:) character(len=20) :: name, ch_err name='psb_dgatherm' if(psb_get_errstatus().ne.0) return info=0 call psb_erractionsave(err_act) icontxt=desc_a%matrix_data(psb_ctxt_) ! check on blacs grid call blacs_gridinfo(icontxt, nprow, npcol, myrow, mycol) if (nprow == -1) then info = 2010 call psb_errpush(info,name) goto 9999 else if (npcol /= 1) then info = 2030 int_err(1) = npcol call psb_errpush(info,name) goto 9999 endif if (present(iroot)) then root = iroot if((root.lt.-1).or.(root.gt.nprow)) 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 if (present(iiglobx)) then iglobx = iiglobx else iglobx = 1 end if if (present(ijglobx)) then jglobx = ijglobx else jglobx = 1 end if if (present(iilocx)) then ilocx = iilocx else ilocx = 1 end if if (present(ijlocx)) then jlocx = ijlocx else jlocx = 1 end if lda_globx = size(globx,1) lda_locx = size(locx, 1) m = desc_a%matrix_data(psb_m_) n = desc_a%matrix_data(psb_n_) lock=size(locx,2)-jlocx+1 globk=size(globx,2)-jglobx+1 maxk=min(lock,globk) if(present(ik)) then if(ik.gt.maxk) then k=maxk else k=ik end if else k = maxk end if if (myrow == iiroot) then call igebs2d(icontxt, 'all', ' ', 1, 1, k, 1) else call igebr2d(icontxt, '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,1),iglobx,jglobx,desc_a%matrix_data,info) call psb_chkvect(m,n,size(locx,1),ilocx,jlocx,desc_a%matrix_data,info,ilx,jlx) if(info.ne.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.ne.1).or.(iglobx.ne.1)) then info=3040 call psb_errpush(info,name) goto 9999 end if globx(:,:)=0.d0 do j=1,k do i=1,desc_a%matrix_data(psb_n_row_) idx = desc_a%loc_to_glob(i) globx(idx,jglobx+j-1) = locx(i,jlx+j-1) end do ! adjust overlapped elements i=0 do while (desc_a%ovrlap_elem(i).ne.-1) idx=desc_a%ovrlap_elem(i+psb_ovrlp_elem_) idx=desc_a%loc_to_glob(idx) globx(idx,jglobx+j-1) = globx(idx,jglobx+j-1)/desc_a%ovrlap_elem(i+psb_n_dom_ovr_) i=i+2 end do end do call dgsum2d(icontxt,'a',' ',m,k,globx(1,jglobx),size(globx,1),root,mycol) call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act.eq.act_abort) then call psb_error(icontxt) return end if return end subroutine psb_dgatherm !!$ !!$ 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_dgatherv ! This subroutine gathers pieces of a distributed dense vector into a local one. ! ! Parameters: ! globx - real,dimension(:). The local vector into which gather the distributed pieces. ! locx - real,dimension(:). The local piece of the ditributed vector to be gathered. ! desc_a - type(). The communication descriptor. ! info - integer. Eventually returns an error code. ! iroot - integer. The process that has to own the global vector. If -1 all ! the processes will have a copy. ! iiglobx - integer(optional). The starting row of the global vector. ! iilocx - integer(optional). The starting row of the local piece of vector. ! subroutine psb_dgatherv(globx, locx, desc_a, info, iroot,& & iiglobx, iilocx) use psb_descriptor_type use psb_check_mod use psb_error_mod implicit none real(kind(1.d0)), intent(in) :: locx(:) real(kind(1.d0)), intent(out) :: globx(:) type(psb_desc_type), intent(in) :: desc_a integer, intent(out) :: info integer, intent(in), optional :: iroot, iiglobx, iilocx ! locals integer :: int_err(5), icontxt, nprow, npcol, myrow, mycol,& & err_act, n, iix, jjx, temp(2), root, iiroot, ilocx, iglobx, jlocx,& & jglobx, lda_locx, lda_globx, lock, maxk, globk, m, k, jlx, ilx, i, j, idx real(kind(1.d0)),pointer :: tmpx(:) character(len=20) :: name, ch_err name='psb_dgatherv' if(psb_get_errstatus().ne.0) return info=0 call psb_erractionsave(err_act) icontxt=desc_a%matrix_data(psb_ctxt_) ! check on blacs grid call blacs_gridinfo(icontxt, nprow, npcol, myrow, mycol) if (nprow == -1) then info = 2010 call psb_errpush(info,name) goto 9999 else if (npcol /= 1) then info = 2030 int_err(1) = npcol call psb_errpush(info,name) goto 9999 endif if (present(iroot)) then root = iroot if((root.lt.-1).or.(root.gt.nprow)) 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 root=0 endif jglobx=1 if (present(iiglobx)) then iglobx = iiglobx else iglobx = 1 end if jlocx=1 if (present(iilocx)) then ilocx = iilocx else ilocx = 1 end if lda_globx = size(globx) lda_locx = size(locx) m = desc_a%matrix_data(psb_m_) n = desc_a%matrix_data(psb_n_) k = 1 if (myrow == root) then call igebs2d(icontxt, 'all', ' ', 1, 1, k, 1) else call igebr2d(icontxt, 'all', ' ', 1, 1, k, 1, root, 0) end if ! there should be a global check on k here!!! call psb_chkglobvect(m,n,size(globx),iglobx,jglobx,desc_a%matrix_data,info) call psb_chkvect(m,n,size(locx),ilocx,jlocx,desc_a%matrix_data,info,ilx,jlx) if(info.ne.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.ne.1).or.(iglobx.ne.1)) then info=3040 call psb_errpush(info,name) goto 9999 end if globx(:)=0.d0 do i=1,desc_a%matrix_data(psb_n_row_) idx = desc_a%loc_to_glob(i) globx(idx) = locx(i) end do ! adjust overlapped elements i=1 do while (desc_a%ovrlap_elem(i).ne.-1) idx=desc_a%ovrlap_elem(i+psb_ovrlp_elem_) idx=desc_a%loc_to_glob(idx) globx(idx) = globx(idx)/desc_a%ovrlap_elem(i+psb_n_dom_ovr_) i=i+2 end do call dgsum2d(icontxt,'a',' ',m,k,globx,size(globx),root,mycol) call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act.eq.act_abort) then call psb_error(icontxt) return end if return end subroutine psb_dgatherv