!!$ !!$ 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_dscatter.f90 ! ! Subroutine: psb_dscatterm ! This subroutine scatters a global matrix locally owned by one process ! into pieces that are local to alle the processes. ! ! Parameters: ! globx - real,dimension(:,:). The global matrix to scatter. ! locx - real,dimension(:,:). The local piece of the ditributed matrix. ! desc_a - type(). The communication descriptor. ! info - integer. Error code. ! iroot - integer(optional). The process that owns the global matrix. If -1 all ! the processes have a copy. Default -1. ! subroutine psb_dscatterm(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 real(kind(1.d0)), intent(out) :: locx(:,:) real(kind(1.d0)), 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 real(kind(1.d0)), 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) call psb_bcast(ictxt,k,root=iiroot) ! 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_double_precision,locx(1,jlocx+c-1),nrow,& & mpi_double_precision,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_dscatterm !!$ !!$ 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_dscatterv ! This subroutine scatters a global vector locally owned by one process ! into pieces that are local to alle the processes. ! ! Parameters: ! globx - real,dimension(:). The global vector to scatter. ! locx - real,dimension(:). The local piece of the ditributed vector. ! desc_a - 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_dscatterv(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 real(kind(1.d0)), intent(out) :: locx(:) real(kind(1.d0)), 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 real(kind(1.d0)), 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 ! 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_double_precision,locx,nrow,& & mpi_double_precision,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_dscatterv