! ! Parallel Sparse BLAS version 3.5 ! (C) Copyright 2006-2018 ! Salvatore Filippone ! Alfredo Buttari ! ! 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_dgather_vect ! This subroutine gathers pieces of a distributed vector into a local one. ! ! Arguments: ! globx - real,dimension(:). The local matrix into which gather ! the distributed pieces. ! locx - type(psb_d_vect_type@ The local piece of the distributed ! vector to be gathered. ! desc_a - type(psb_desc_type). The communication descriptor. ! info - integer. Error code. ! iroot - integer. The process that has to own the ! global matrix. If -1 all ! the processes will have a copy. ! subroutine psb_dgather_vect(globx, locx, desc_a, info, iroot) use psb_base_mod, psb_protect_name => psb_dgather_vect implicit none type(psb_d_vect_type), intent(inout) :: locx real(psb_dpk_), intent(out), allocatable :: globx(:) type(psb_desc_type), intent(in) :: desc_a integer(psb_ipk_), intent(out) :: info integer(psb_ipk_), intent(in), optional :: iroot ! locals type(psb_ctxt_type) :: ctxt integer(psb_mpk_) :: np, me, root, iiroot, icomm, myrank, rootrank, loc_rows integer(psb_ipk_) :: ierr(5), err_act, jlx, ilx, lda_locx, lda_globx, i integer(psb_lpk_) :: m, n, k, ilocx, jlocx, idx, iglobx, jglobx real(psb_dpk_), allocatable :: llocx(:) integer(psb_mpk_), allocatable :: szs(:) character(len=20) :: name, ch_err name='psb_dgatherv' info=psb_success_ call psb_erractionsave(err_act) if (psb_errstatus_fatal()) then info = psb_err_internal_error_ ; goto 9999 end if ctxt=desc_a%get_context() ! check on blacs grid call psb_info(ctxt, 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_ ierr(1)=5; ierr(2)=root; call psb_errpush(info,name,i_err=ierr) goto 9999 end if else root = -1 end if jglobx=1 iglobx = 1 jlocx=1 ilocx = 1 m = desc_a%get_global_rows() n = desc_a%get_global_cols() lda_globx = m lda_locx = locx%get_nrows() k = 1 ! there should be a global check on k here!!! call psb_chkglobvect(m,n,lda_globx,iglobx,jglobx,desc_a,info) if (info == psb_success_) & & call psb_chkvect(m,n,locx%get_nrows(),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 llocx = locx%get_vect() ! adjust overlapped elements do i=1, size(desc_a%ovrlap_elem,1) if (me /= desc_a%ovrlap_elem(i,3)) then idx = desc_a%ovrlap_elem(i,1) llocx(idx) = dzero end if end do allocate(szs(np)) loc_rows = desc_a%get_local_rows() call psb_gather(ctxt,loc_rows,szs,root=root) if ((me == root).or.(root == -1)) then if (sum(szs) /= m) then info=psb_err_internal_error_ call psb_errpush(info,name) goto 9999 end if call psb_realloc(m,globx,info) if (info /= psb_success_) then info=psb_err_alloc_dealloc_ call psb_errpush(info,name) goto 9999 end if end if call psb_gatherv(ctxt,llocx(1:loc_rows),globx,szs,root=root) call psb_erractionrestore(err_act) return 9999 call psb_error_handler(ctxt,err_act) return end subroutine psb_dgather_vect ! Subroutine: psb_dgather_multivect ! This subroutine gathers pieces of a distributed multivector into a local one. subroutine psb_dgather_multivect(globx, locx, desc_a, info, iroot) use psb_base_mod, psb_protect_name => psb_dgather_multivect implicit none type(psb_d_multivect_type), intent(inout) :: locx real(psb_dpk_), intent(out), allocatable :: globx(:,:) type(psb_desc_type), intent(in) :: desc_a integer(psb_ipk_), intent(out) :: info integer(psb_ipk_), intent(in), optional :: iroot ! locals type(psb_ctxt_type) :: ctxt integer(psb_mpk_) :: np, me, root, iiroot, icomm, myrank, rootrank integer(psb_ipk_) :: ierr(5), err_act, jlx, ilx, lda_locx, lda_globx, i integer(psb_lpk_) :: m, n, k, ilocx, jlocx, idx, iglobx, jglobx real(psb_dpk_), allocatable :: llocx(:,:) character(len=20) :: name, ch_err name='psb_dgatherv' info=psb_success_ call psb_erractionsave(err_act) if (psb_errstatus_fatal()) then info = psb_err_internal_error_ ; goto 9999 end if ctxt=desc_a%get_context() ! check on blacs grid call psb_info(ctxt, 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_ ierr(1)=5; ierr(2)=root; call psb_errpush(info,name,i_err=ierr) goto 9999 end if else root = -1 end if jglobx=1 iglobx = 1 jlocx=1 ilocx = 1 m = desc_a%get_global_rows() n = desc_a%get_global_cols() lda_globx = m lda_locx = locx%get_nrows() k = locx%get_ncols() ! there should be a global check on k here!!! call psb_chkglobvect(m,n,lda_globx,iglobx,jglobx,desc_a,info) if (info == psb_success_) & & call psb_chkvect(m,n,locx%get_nrows(),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 call psb_realloc(m,k,globx,info) if (info /= psb_success_) then info=psb_err_alloc_dealloc_ call psb_errpush(info,name) goto 9999 end if globx(:,:) = dzero llocx = locx%get_vect() do i=1,desc_a%get_local_rows() call psb_loc_to_glob(i,idx,desc_a,info) globx(idx,:) = llocx(i,:) end do ! adjust overlapped elements do i=1, size(desc_a%ovrlap_elem,1) if (me /= desc_a%ovrlap_elem(i,3)) then idx = desc_a%ovrlap_elem(i,1) call psb_loc_to_glob(idx,desc_a,info) globx(idx,:) = dzero end if end do call psb_sum(ctxt,globx(1:m,1:k),root=root) call psb_erractionrestore(err_act) return 9999 call psb_error_handler(ctxt,err_act) return end subroutine psb_dgather_multivect