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282 lines
8.3 KiB
Fortran
282 lines
8.3 KiB
Fortran
!
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! Parallel Sparse BLAS version 3.5
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! (C) Copyright 2006-2018
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! Salvatore Filippone
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! Alfredo Buttari
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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_dgather.f90
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!
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! Subroutine: psb_dgather_vect
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! This subroutine gathers pieces of a distributed vector into a local one.
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!
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! Arguments:
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! globx - real,dimension(:). The local matrix into which gather
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! the distributed pieces.
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! locx - type(psb_d_vect_type@ The local piece of the distributed
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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_dgather_vect(globx, locx, desc_a, info, iroot)
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use psb_base_mod, psb_protect_name => psb_dgather_vect
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implicit none
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type(psb_d_vect_type), intent(inout) :: locx
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real(psb_dpk_), intent(out), allocatable :: globx(:)
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type(psb_desc_type), intent(in) :: desc_a
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_), intent(in), optional :: iroot
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! locals
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type(psb_ctxt_type) :: ctxt
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integer(psb_mpk_) :: np, me, root, iiroot, icomm, myrank, rootrank, loc_rows
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integer(psb_ipk_) :: ierr(5), err_act, jlx, ilx, lda_locx, lda_globx, i
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integer(psb_lpk_) :: m, n, k, ilocx, jlocx, idx, iglobx, jglobx
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real(psb_dpk_), allocatable :: llocx(:)
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integer(psb_mpk_), allocatable :: szs(:)
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character(len=20) :: name, ch_err
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name='psb_dgatherv'
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info=psb_success_
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call psb_erractionsave(err_act)
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if (psb_errstatus_fatal()) then
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info = psb_err_internal_error_ ; goto 9999
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end if
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ctxt=desc_a%get_context()
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! check on blacs grid
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call psb_info(ctxt, me, np)
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if (np == -1) then
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info = psb_err_context_error_
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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 < -1).or.(root > np)) then
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info=psb_err_input_value_invalid_i_
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ierr(1)=5; ierr(2)=root;
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call psb_errpush(info,name,i_err=ierr)
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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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m = desc_a%get_global_rows()
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n = desc_a%get_global_cols()
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lda_globx = m
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lda_locx = locx%get_nrows()
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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,lda_globx,iglobx,jglobx,desc_a,info)
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if (info == psb_success_) &
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& call psb_chkvect(m,n,locx%get_nrows(),ilocx,jlocx,desc_a,info,ilx,jlx)
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if(info /= psb_success_) then
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info=psb_err_from_subroutine_
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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 /= 1).or.(iglobx /= 1)) then
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info=psb_err_ix_n1_iy_n1_unsupported_
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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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llocx = locx%get_vect()
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! adjust overlapped elements
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do i=1, size(desc_a%ovrlap_elem,1)
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if (me /= desc_a%ovrlap_elem(i,3)) then
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idx = desc_a%ovrlap_elem(i,1)
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llocx(idx) = dzero
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end if
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end do
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allocate(szs(np))
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loc_rows = desc_a%get_local_rows()
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call psb_gather(ctxt,loc_rows,szs,root=root)
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if ((me == root).or.(root == -1)) then
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if (sum(szs) /= m) then
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info=psb_err_internal_error_
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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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call psb_realloc(m,globx,info)
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if (info /= psb_success_) then
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info=psb_err_alloc_dealloc_
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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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end if
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call psb_gatherv(ctxt,llocx(1:loc_rows),globx,szs,root=root)
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(ctxt,err_act)
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return
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end subroutine psb_dgather_vect
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! Subroutine: psb_dgather_multivect
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! This subroutine gathers pieces of a distributed multivector into a local one.
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subroutine psb_dgather_multivect(globx, locx, desc_a, info, iroot)
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use psb_base_mod, psb_protect_name => psb_dgather_multivect
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implicit none
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type(psb_d_multivect_type), intent(inout) :: locx
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real(psb_dpk_), intent(out), allocatable :: globx(:,:)
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type(psb_desc_type), intent(in) :: desc_a
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_), intent(in), optional :: iroot
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! locals
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type(psb_ctxt_type) :: ctxt
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integer(psb_mpk_) :: np, me, root, iiroot, icomm, myrank, rootrank
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integer(psb_ipk_) :: ierr(5), err_act, jlx, ilx, lda_locx, lda_globx, i
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integer(psb_lpk_) :: m, n, k, ilocx, jlocx, idx, iglobx, jglobx
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real(psb_dpk_), allocatable :: llocx(:,:)
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character(len=20) :: name, ch_err
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name='psb_dgatherv'
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info=psb_success_
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call psb_erractionsave(err_act)
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if (psb_errstatus_fatal()) then
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info = psb_err_internal_error_ ; goto 9999
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end if
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ctxt=desc_a%get_context()
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! check on blacs grid
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call psb_info(ctxt, me, np)
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if (np == -1) then
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info = psb_err_context_error_
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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 < -1).or.(root > np)) then
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info=psb_err_input_value_invalid_i_
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ierr(1)=5; ierr(2)=root;
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call psb_errpush(info,name,i_err=ierr)
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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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m = desc_a%get_global_rows()
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n = desc_a%get_global_cols()
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lda_globx = m
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lda_locx = locx%get_nrows()
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k = locx%get_ncols()
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! there should be a global check on k here!!!
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call psb_chkglobvect(m,n,lda_globx,iglobx,jglobx,desc_a,info)
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if (info == psb_success_) &
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& call psb_chkvect(m,n,locx%get_nrows(),ilocx,jlocx,desc_a,info,ilx,jlx)
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if(info /= psb_success_) then
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info=psb_err_from_subroutine_
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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 /= 1).or.(iglobx /= 1)) then
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info=psb_err_ix_n1_iy_n1_unsupported_
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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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call psb_realloc(m,k,globx,info)
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if (info /= psb_success_) then
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info=psb_err_alloc_dealloc_
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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(:,:) = dzero
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llocx = locx%get_vect()
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do i=1,desc_a%get_local_rows()
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call psb_loc_to_glob(i,idx,desc_a,info)
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globx(idx,:) = llocx(i,:)
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end do
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! adjust overlapped elements
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do i=1, size(desc_a%ovrlap_elem,1)
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if (me /= desc_a%ovrlap_elem(i,3)) then
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idx = desc_a%ovrlap_elem(i,1)
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call psb_loc_to_glob(idx,desc_a,info)
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globx(idx,:) = dzero
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end if
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end do
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call psb_sum(ctxt,globx(1:m,1:k),root=root)
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(ctxt,err_act)
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return
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end subroutine psb_dgather_multivect
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