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96 lines
3.7 KiB
Fortran
96 lines
3.7 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: psi_dl_check.f90
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!
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! Subroutine: psi_dl_check
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! Make sure a dependency list is symmetric, i.e. if process i depends on j
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! then process j should depend on i (even if the data to be sent in one of the
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! directions happens to be empty)
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!
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! Arguments:
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! dep_list(:,:) - integer Initial dependency lists
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! dl_lda - integer Allocated size of dep_list
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! np - integer Total number of processes.
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! length_dl(:) - integer Items in dependency lists; updated on
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! exit
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!
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subroutine psi_i_dl_check(dep_list,dl_lda,np,length_dl)
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use psi_mod, psb_protect_name => psi_i_dl_check
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use psb_const_mod
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use psb_desc_mod
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implicit none
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integer(psb_ipk_) :: np,dl_lda,length_dl(0:np)
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integer(psb_ipk_) :: dep_list(dl_lda,0:np)
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! locals
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integer(psb_ipk_) :: proc, proc2, i, j
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! ...if j is in dep_list of process i
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! and i is not in dep_list of process j
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! fix it.
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do proc=0,np-1
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i=1
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outer: do
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if (i >length_dl(proc)) exit outer
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proc2=dep_list(i,proc)
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if ((proc2 /= -1).and.(proc2 /= proc)) then
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! ...search proc in proc2's dep_list....
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j=1
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p2loop:do
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if (j > length_dl(proc2)) exit p2loop
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if (dep_list(j,proc2) == proc) exit p2loop
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j=j+1
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enddo p2loop
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if (j > length_dl(proc2)) then
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! ...add proc to proc2 s dep_list.....',proc,proc2
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length_dl(proc2) = length_dl(proc2)+1
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if (length_dl(proc2) > size(dep_list,1)) then
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write(psb_err_unit,*)'error in dl_check', proc2,proc,&
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& length_dl(proc2),'>',size(dep_list,1)
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endif
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dep_list(length_dl(proc2),proc2) = proc
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else if (dep_list(j,proc2) /= proc) then
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write(psb_err_unit,*) 'PSI_DL_CHECK This should not happen!!! ',&
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& j,proc2,dep_list(j,proc2),proc
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endif
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endif
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i=i+1
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enddo outer
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enddo
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end subroutine psi_i_dl_check
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