!!$ !!$ Parallel Sparse BLAS version 3.0 !!$ (C) Copyright 2006, 2007, 2008, 2009, 2010 !!$ Salvatore Filippone University of Rome Tor Vergata !!$ Alfredo Buttari CNRS-IRIT, Toulouse !!$ !!$ 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_iscatter.f90 ! ! Subroutine: psb_iscatterm ! This subroutine scatters a global matrix locally owned by one process ! into pieces that are local to alle the processes. ! ! Arguments: ! globx - integer(psb_ipk_),dimension(:,:). The global matrix to scatter. ! locx - integer(psb_ipk_),dimension(:,:). The local piece of the ditributed matrix. ! desc_a - type(psb_desc_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. ! subroutine psb_iscatterm(globx, locx, desc_a, info, iroot) use psb_base_mod, psb_protect_name => psb_iscatterm #ifdef MPI_MOD use mpi #endif implicit none #ifdef MPI_H include 'mpif.h' #endif integer(psb_ipk_), intent(out) :: locx(:,:) integer(psb_ipk_), intent(in) :: globx(:,:) type(psb_desc_type), intent(in) :: desc_a integer(psb_ipk_), intent(out) :: info integer(psb_ipk_), intent(in), optional :: iroot ! locals integer(psb_ipk_) :: 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(psb_ipk_), allocatable :: scatterv(:) integer(psb_ipk_), allocatable :: displ(:), l_t_g_all(:), all_dim(:), ltg(:) character(len=20) :: name, ch_err name='psb_scatterm' if(psb_get_errstatus() /= 0) return info=psb_success_ call psb_erractionsave(err_act) ictxt=desc_a%get_context() ! check on blacs grid call psb_info(ictxt, me, np) if (np == -1) then info = psb_err_context_error_ call psb_errpush(info,name) goto 9999 endif if (present(iroot)) then root = iroot if((root < -1).or.(root > np)) then info=psb_err_input_value_invalid_i_ 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 = psb_root_ endif iglobx = 1 jglobx = 1 ilocx = 1 jlocx = 1 lda_globx = size(globx,1) lda_locx = size(locx, 1) m = desc_a%get_global_rows() n = desc_a%get_global_cols() 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 = desc_a%get_global_rows() n = desc_a%get_global_cols() 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 == psb_success_) call psb_chkvect(m,n,size(locx),ilocx,jlocx,desc_a,info,ilx,jlx) if(info /= psb_success_) then info=psb_err_from_subroutine_ 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=psb_err_ix_n1_iy_n1_unsupported_ call psb_errpush(info,name) goto 9999 end if nrow=desc_a%get_local_rows() if ((root == -1).or.(np == 1)) then ! extract my chunk do j=1,k do i=1, nrow call psb_loc_to_glob(i,idx,desc_a,info) locx(i,jlocx+j-1)=globx(idx,jglobx+j-1) end do end do else call psb_get_rank(rootrank,ictxt,root) ! root has to gather size information allocate(displ(np),all_dim(np),ltg(nrow),stat=info) if(info /= psb_success_) then info=psb_err_from_subroutine_ ch_err='Allocate' call psb_errpush(info,name,a_err=ch_err) goto 9999 end if do i=1, nrow ltg(i) = i end do call psb_loc_to_glob(ltg(1:nrow),desc_a,info) call mpi_gather(nrow,1,psb_mpi_integer,all_dim,& & 1,psb_mpi_integer,rootrank,icomm,info) if (me == root) then displ(1)=0 do i=2,np displ(i)=displ(i-1)+all_dim(i-1) end do ! root has to gather loc_glob from each process allocate(l_t_g_all(sum(all_dim)),scatterv(sum(all_dim)),stat=info) if(info /= psb_success_) then info=psb_err_from_subroutine_ ch_err='Allocate' call psb_errpush(info,name,a_err=ch_err) goto 9999 end if end if call mpi_gatherv(ltg,nrow,& & psb_mpi_integer,l_t_g_all,all_dim,& & displ,psb_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) scatterv(pos+j)=globx(idx,jglobx+c-1) end do end do end if ! scatter !!! call mpi_scatterv(scatterv,all_dim,displ,& & psb_mpi_integer,locx(1,jlocx+c-1),nrow,& & psb_mpi_integer,rootrank,icomm,info) end do if (me == root) deallocate(all_dim, l_t_g_all, displ, scatterv) end if 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 version 3.0 !!$ (C) Copyright 2006, 2007, 2008, 2009, 2010 !!$ Salvatore Filippone University of Rome Tor Vergata !!$ Alfredo Buttari CNRS-IRIT, Toulouse !!$ !!$ 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. ! ! Arguments: ! globx - integer(psb_ipk_),dimension(:). The global vector to scatter. ! locx - integer(psb_ipk_),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_base_mod, psb_protect_name => psb_iscatterv #ifdef MPI_MOD use mpi #endif implicit none #ifdef MPI_H include 'mpif.h' #endif integer(psb_ipk_), intent(out) :: locx(:) integer(psb_ipk_), intent(in) :: globx(:) type(psb_desc_type), intent(in) :: desc_a integer(psb_ipk_), intent(out) :: info integer(psb_ipk_), intent(in), optional :: iroot ! locals integer(psb_ipk_) :: int_err(5), ictxt, np, me, & & err_act, m, n, i, j, idx, nrow, iglobx, jglobx,& & ilocx, jlocx, lda_locx, lda_globx, root, k, icomm, myrank,& & rootrank, pos, ilx, jlx integer(psb_ipk_), allocatable :: scatterv(:) integer(psb_ipk_), allocatable :: displ(:), l_t_g_all(:), all_dim(:), ltg(:) character(len=20) :: name, ch_err integer(psb_ipk_) :: debug_level, debug_unit name='psb_scatterv' if (psb_get_errstatus() /= 0) return info=psb_success_ call psb_erractionsave(err_act) ictxt=desc_a%get_context() debug_unit = psb_get_debug_unit() debug_level = psb_get_debug_level() ! check on blacs grid call psb_info(ictxt, me, np) if (np == -1) then info = psb_err_context_error_ call psb_errpush(info,name) goto 9999 endif if (present(iroot)) then root = iroot if((root < -1).or.(root > np)) then info=psb_err_input_value_invalid_i_ 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) iglobx = 1 jglobx = 1 ilocx = 1 jlocx = 1 lda_globx = size(globx) lda_locx = size(locx) m = desc_a%get_global_rows() n = desc_a%get_global_cols() 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 == psb_success_) & & call psb_chkvect(m,n,size(locx),ilocx,jlocx,desc_a,info,ilx,jlx) if(info /= psb_success_) then info=psb_err_from_subroutine_ 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=psb_err_ix_n1_iy_n1_unsupported_ call psb_errpush(info,name) goto 9999 end if nrow = desc_a%get_local_rows() if ((root == -1).or.(np == 1)) then ! extract my chunk do i=1, nrow call psb_loc_to_glob(i,idx,desc_a,info) locx(i)=globx(idx) end do else call psb_get_rank(rootrank,ictxt,root) ! root has to gather size information allocate(displ(np),all_dim(np),ltg(nrow)) do i=1, nrow ltg(i) = i end do call psb_loc_to_glob(ltg(1:nrow),desc_a,info) call mpi_gather(nrow,1,psb_mpi_integer,all_dim,& & 1,psb_mpi_integer,rootrank,icomm,info) if(me == root) then displ(1)=0 do i=2,np displ(i)=displ(i-1) + all_dim(i-1) end do if (debug_level >= psb_debug_inner_) then write(debug_unit,*) me,' ',trim(name),' displ:',displ(1:np), & &' dim',all_dim(1:np), sum(all_dim) endif ! root has to gather loc_glob from each process allocate(l_t_g_all(sum(all_dim)),scatterv(sum(all_dim))) end if call mpi_gatherv(ltg,nrow,& & psb_mpi_integer,l_t_g_all,all_dim,& & displ,psb_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) scatterv(pos+j)=globx(idx) end do end do end if call mpi_scatterv(scatterv,all_dim,displ,& & psb_mpi_integer,locx,nrow,& & psb_mpi_integer,rootrank,icomm,info) if (me == root) deallocate(all_dim, l_t_g_all, displ, scatterv) end if 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