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130 lines
3.9 KiB
Fortran
130 lines
3.9 KiB
Fortran
!!$
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!!$ Parallel Sparse BLAS v2.0
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!!$ (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata
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!!$ Alfredo Buttari University of Rome Tor Vergata
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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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subroutine psi_compute_size(desc_data, index_in, dl_lda, info)
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use psb_const_mod
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use psb_error_mod
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use psb_penv_mod
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implicit none
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! ....scalars parameters....
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integer :: info, dl_lda
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! .....array parameters....
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integer :: desc_data(:), index_in(:)
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! ....local scalars....
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integer :: i,np,me,proc, max_index
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integer :: ictxt, err_act
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! ...local array...
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integer :: int_err(5)
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integer, allocatable :: counter_recv(:), counter_dl(:)
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! ...parameters
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logical, parameter :: debug=.false.
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character(len=20) :: name
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name='psi_compute_size'
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call psb_get_erraction(err_act)
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info = 0
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ictxt = desc_data(psb_ctxt_)
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call psb_info(ictxt,me,np)
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if (np == -1) then
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info = 2010
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call psb_errpush(info,name)
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goto 9999
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endif
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allocate(counter_dl(0:np-1),counter_recv(0:np-1),stat=info)
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if (info /= 0) then
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call psb_errpush(4010,name,a_err='Allocate')
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goto 9999
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end if
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! ..initialize counters...
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do i=0,np-1
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counter_recv(i)=0
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counter_dl(i)=0
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enddo
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! ....verify local correctness of halo_in....
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i=1
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do while (index_in(i).ne.-1)
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proc=index_in(i)
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if ((proc.gt.np-1).or.(proc.lt.0)) then
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info = 115
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int_err(1) = 11
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int_err(2) = proc
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call psb_errpush(info,name,i_err=int_err)
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goto 9999
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endif
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counter_dl(proc)=1
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! ..update no of elements to receive from proc proc..
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counter_recv(proc)=counter_recv(proc)+&
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& index_in(i+1)
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i=i+index_in(i+1)+2
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enddo
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! ...computing max_halo: max halo points to be received from
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! same processor
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max_index=0
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dl_lda=0
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do i=0,np-1
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if (counter_recv(i).gt.max_index) max_index = counter_recv(i)
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if (counter_dl(i).eq.1) dl_lda = dl_lda+1
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enddo
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! computing max global value of dl_lda
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call psb_amx(ictxt, dl_lda)
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if (debug) then
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write(0,*) 'psi_compute_size: ',dl_lda
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endif
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act == act_abort) then
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call psb_error(ictxt)
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return
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end if
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return
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end subroutine psi_compute_size
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