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336 lines
12 KiB
Fortran
336 lines
12 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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!
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! File: psb_lovrl.f90
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!
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! Subroutine: psb_lovrl_vect
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! This subroutine performs the exchange of the overlap elements in a
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! distributed dense vector between all the processes.
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!
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! Arguments:
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! x - type(psb_l_vect_type) The local part of the vector
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! desc_a - type(psb_desc_type). The communication descriptor.
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! info - integer. Return code.
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! jx - integer(optional). The starting column of the global matrix
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! ik - integer(optional). The number of columns to gather.
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! work - integer(optional). A work area.
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! update - integer(optional). Type of update:
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! psb_none_ do nothing
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! psb_sum_ sum of overlaps
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! psb_avg_ average of overlaps
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! mode - integer(optional). Choose the algorithm for data exchange:
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! this is chosen through bit fields.
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! - swap_mpi = iand(flag,psb_swap_mpi_) /= 0
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! - swap_sync = iand(flag,psb_swap_sync_) /= 0
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! - swap_send = iand(flag,psb_swap_send_) /= 0
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! - swap_recv = iand(flag,psb_swap_recv_) /= 0
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! - if (swap_mpi): use underlying MPI_ALLTOALLV.
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! - if (swap_sync): use PSB_SND and PSB_RCV in
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! synchronized pairs
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! - if (swap_send .and. swap_recv): use mpi_irecv
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! and mpi_send
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! - if (swap_send): use psb_snd (but need another
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! call with swap_recv to complete)
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! - if (swap_recv): use psb_rcv (completing a
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! previous call with swap_send)
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!
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subroutine psb_lovrl_vect(x,desc_a,info,work,update,mode)
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use psb_base_mod, psb_protect_name => psb_lovrl_vect
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use psi_mod
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implicit none
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type(psb_l_vect_type), intent(inout) :: x
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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_lpk_), optional, target, intent(inout) :: work(:)
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integer(psb_ipk_), intent(in), optional :: update,mode
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! locals
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type(psb_ctxt_type) :: ictxt
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integer(psb_ipk_) :: np, me, err_act, k, iix, jjx, &
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& nrow, ncol, ldx, liwork, data_, update_, mode_
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integer(psb_lpk_) :: m, n, ix, ijx
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integer(psb_lpk_),pointer :: iwork(:)
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logical :: do_swap
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character(len=20) :: name, ch_err
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logical :: aliw
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name='psb_lovrlv'
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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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ictxt=desc_a%get_context()
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! check on blacs grid
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call psb_info(ictxt, 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 (.not.allocated(x%v)) then
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info = psb_err_invalid_vect_state_
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call psb_errpush(info,name)
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goto 9999
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endif
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ix = 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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nrow = desc_a%get_local_rows()
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ncol = desc_a%get_local_cols()
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ldx = x%get_nrows()
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k = 1
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if (present(update)) then
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update_ = update
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else
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update_ = psb_avg_
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endif
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if (present(mode)) then
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mode_ = mode
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else
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mode_ = IOR(psb_swap_send_,psb_swap_recv_)
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endif
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do_swap = (mode_ /= 0)
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! check vector correctness
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if ((info == 0).and.(ldx<ncol)) call x%reall(ncol,info)
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if(info /= psb_success_) then
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info=psb_err_from_subroutine_; ch_err='psb_reall'
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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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! check for presence/size of a work area
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liwork=ncol
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if (present(work)) then
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if(size(work) >= liwork) then
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aliw=.false.
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else
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aliw=.true.
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end if
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else
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aliw=.true.
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end if
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if (aliw) then
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allocate(iwork(liwork),stat=info)
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if(info /= psb_success_) then
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info=psb_err_from_subroutine_
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call psb_errpush(info,name,a_err='Allocate')
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goto 9999
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end if
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else
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iwork => work
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end if
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! exchange overlap elements
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if (do_swap) then
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call psi_swapdata(mode_,lone,x%v,&
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& desc_a,iwork,info,data=psb_comm_ovr_)
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end if
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if (info == psb_success_) call psi_ovrl_upd(x%v,desc_a,update_,info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,a_err='Inner updates')
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goto 9999
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end if
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if (aliw) deallocate(iwork)
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nullify(iwork)
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(ictxt,err_act)
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return
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end subroutine psb_lovrl_vect
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!
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! Subroutine: psb_lovrl_multivect
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! This subroutine performs the exchange of the overlap elements in a
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! distributed multivector between all the processes.
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!
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! Arguments:
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! x - type(psb_l_vect_type) The local part of the multivector
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! desc_a - type(psb_desc_type). The communication descriptor.
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! info - integer. Return code.
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! jx - integer(optional). The starting column of the global matrix
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! ik - integer(optional). The number of columns to gather.
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! work - integer(optional). A work area.
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! update - integer(optional). Type of update:
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! psb_none_ do nothing
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! psb_sum_ sum of overlaps
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! psb_avg_ average of overlaps
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! mode - integer(optional). Choose the algorithm for data exchange:
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! this is chosen through bit fields.
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! - swap_mpi = iand(flag,psb_swap_mpi_) /= 0
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! - swap_sync = iand(flag,psb_swap_sync_) /= 0
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! - swap_send = iand(flag,psb_swap_send_) /= 0
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! - swap_recv = iand(flag,psb_swap_recv_) /= 0
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! - if (swap_mpi): use underlying MPI_ALLTOALLV.
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! - if (swap_sync): use PSB_SND and PSB_RCV in
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! synchronized pairs
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! - if (swap_send .and. swap_recv): use mpi_irecv
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! and mpi_send
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! - if (swap_send): use psb_snd (but need another
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! call with swap_recv to complete)
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! - if (swap_recv): use psb_rcv (completing a
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! previous call with swap_send)
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!
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subroutine psb_lovrl_multivect(x,desc_a,info,work,update,mode)
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use psb_base_mod, psb_protect_name => psb_lovrl_multivect
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use psi_mod
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implicit none
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type(psb_l_multivect_type), intent(inout) :: x
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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_lpk_), optional, target, intent(inout) :: work(:)
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integer(psb_ipk_), intent(in), optional :: update,mode
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! locals
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type(psb_ctxt_type) :: ictxt
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integer(psb_ipk_) :: np, me, err_act, k, iix, jjx, &
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& nrow, ncol, ldx, liwork, data_, update_, mode_
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integer(psb_lpk_) :: m, n, ix, ijx
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integer(psb_lpk_),pointer :: iwork(:)
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logical :: do_swap
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character(len=20) :: name, ch_err
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logical :: aliw
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name='psb_lovrlv'
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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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ictxt=desc_a%get_context()
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! check on blacs grid
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call psb_info(ictxt, 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 (.not.allocated(x%v)) then
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info = psb_err_invalid_vect_state_
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call psb_errpush(info,name)
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goto 9999
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endif
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ix = 1
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ijx = 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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nrow = desc_a%get_local_rows()
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ncol = desc_a%get_local_cols()
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ldx = x%get_nrows()
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k = 1
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if (present(update)) then
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update_ = update
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else
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update_ = psb_avg_
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endif
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if (present(mode)) then
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mode_ = mode
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else
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mode_ = IOR(psb_swap_send_,psb_swap_recv_)
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endif
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do_swap = (mode_ /= 0)
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! check vector correctness
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if (ldx < ncol) call x%reall(ncol,x%get_ncols(),info)
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if(info /= psb_success_) then
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info=psb_err_from_subroutine_ ; ch_err='psb_reall'
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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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! check for presence/size of a work area
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liwork=ncol
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if (present(work)) then
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if(size(work) >= liwork) then
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aliw=.false.
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else
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aliw=.true.
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end if
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else
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aliw=.true.
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end if
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if (aliw) then
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allocate(iwork(liwork),stat=info)
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if(info /= psb_success_) then
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info=psb_err_from_subroutine_
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call psb_errpush(info,name,a_err='Allocate')
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goto 9999
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end if
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else
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iwork => work
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end if
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! exchange overlap elements
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if (do_swap) then
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call psi_swapdata(mode_,lone,x%v,&
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& desc_a,iwork,info,data=psb_comm_ovr_)
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end if
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if (info == psb_success_) call psi_ovrl_upd(x%v,desc_a,update_,info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,a_err='Inner updates')
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goto 9999
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end if
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if (aliw) deallocate(iwork)
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nullify(iwork)
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(ictxt,err_act)
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return
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end subroutine psb_lovrl_multivect
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