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psblas3/base/internals/psi_bld_tmpovrl.f90

151 lines
4.9 KiB
Fortran

!
! 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: psi_bld_tmpovrl.f90
!
! Subroutine: psi_bld_tmpovrl
! Build initial versions of overlap exchange lists.
! When the descriptor is for a large index space, we cannot build
! the data exchange lists "on-the-fly", but we also want to keep using the
! same format conversion routines we use in the small index space case,
! hence this adapter routine.
!
!
! Arguments:
! iv(:) - integer Initial list.
! index
! nprocs (sharing it)
! procs(1:nprocs)
! End marked with -1
!
! desc - type(psb_desc_type). The communication descriptor.
! info - integer. return code.
!
subroutine psi_bld_tmpovrl(iv,desc,info)
use psb_desc_mod
use psb_serial_mod
use psb_const_mod
use psb_error_mod
use psb_penv_mod
use psb_realloc_mod
use psi_mod, psb_protect_name => psi_bld_tmpovrl
implicit none
integer(psb_ipk_), intent(in) :: iv(:)
type(psb_desc_type), intent(inout) :: desc
integer(psb_ipk_), intent(out) :: info
!locals
integer(psb_ipk_) :: counter,i,j,np,me,loc_row,err,loc_col,nprocs,&
& l_ov_ix,l_ov_el,idx, err_act, itmpov, k, glx, icomm
integer(psb_ipk_), allocatable :: ov_idx(:),ov_el(:,:)
integer(psb_ipk_) :: ictxt,n_row, debug_unit, debug_level
character(len=20) :: name,ch_err
info = psb_success_
name = 'psi_bld_tmpovrl'
call psb_erractionsave(err_act)
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
ictxt = desc%get_context()
icomm = desc%get_mpic()
! 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
l_ov_ix=0
l_ov_el=0
i = 1
do while (iv(i) /= -1)
idx = iv(i)
i = i + 1
nprocs = iv(i)
i = i + 1
l_ov_ix = l_ov_ix+3*(nprocs-1)
l_ov_el = l_ov_el + 1
i = i + nprocs
enddo
l_ov_ix = l_ov_ix+3
if (debug_level >= psb_debug_inner_) &
& write(debug_unit,*) me,' ',trim(name),': Ov len',l_ov_ix,l_ov_el
allocate(ov_idx(l_ov_ix),ov_el(l_ov_el,3), stat=info)
if (info /= psb_no_err_) then
info=psb_err_from_subroutine_
err=info
call psb_errpush(err,name,a_err='psb_realloc')
goto 9999
end if
l_ov_ix=0
l_ov_el=0
i = 1
do while (iv(i) /= -1)
idx = iv(i)
i = i+1
nprocs = iv(i)
l_ov_el = l_ov_el+1
ov_el(l_ov_el,1) = idx ! Index
ov_el(l_ov_el,2) = nprocs ! How many procs
ov_el(l_ov_el,3) = minval(iv(i+1:i+nprocs)) ! master proc
do j=1, nprocs
if (iv(i+j) /= me) then
ov_idx(l_ov_ix+1) = iv(i+j)
ov_idx(l_ov_ix+2) = 1
ov_idx(l_ov_ix+3) = idx
l_ov_ix = l_ov_ix+3
endif
enddo
i = i + nprocs + 1
enddo
l_ov_ix = l_ov_ix + 1
ov_idx(l_ov_ix) = -1
call psb_move_alloc(ov_idx,desc%ovrlap_index,info)
if (info == psb_success_) call psb_move_alloc(ov_el,desc%ovrlap_elem,info)
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(ictxt,err_act)
return
end subroutine psi_bld_tmpovrl