!!$
!!$ Parallel Sparse BLAS version 2.2
!!$ (C) Copyright 2006/2007/2008
!!$ Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari University of Rome Tor Vergata
!!$
!!$ 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
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!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
!!$ POSSIBILITY OF SUCH DAMAGE.
!!$
!!$
!
!
! File: psi_crea_index.f90
!
! Subroutine: psb_crea_index
! Converts a list of data exchanges from build format to assembled format.
! See psi_desc_index for a description of the formats.
! Works by first finding a suitable ordering for the data exchanges,
! then doing the actual conversion.
!
! Arguments:
! desc_a - type(psb_desc_type) The descriptor; in this context only the index
! mapping parts are used.
! index_in(:) - integer The index list, build format
! index_out(:) - integer, allocatable The index list, assembled format
! glob_idx - logical Whether the input indices are in local or global
! numbering; the global numbering is used when
! converting the overlap exchange lists.
! nxch - integer The number of data exchanges on the calling process
! nsnd - integer Total send buffer size on the calling process
! nrcv - integer Total receive buffer size on the calling process
!
!
subroutine psi_crea_index(desc_a,index_in,index_out,glob_idx,nxch,nsnd,nrcv,info)
use psb_realloc_mod
use psb_descriptor_type
use psb_error_mod
use psb_penv_mod
use psi_mod, psb_protect_name => psi_crea_index
implicit none
type(psb_desc_type), intent(in) :: desc_a
integer, intent(out) :: info,nxch,nsnd,nrcv
integer, intent(in) :: index_in(:)
integer, allocatable :: index_out(:)
logical :: glob_idx
! ....local scalars...
integer :: ictxt, me, np, mode, err_act, dl_lda
! ...parameters...
integer, allocatable :: dep_list(:,:), length_dl(:)
integer,parameter :: root=psb_root_,no_comm=-1
integer :: debug_level, debug_unit
character(len=20) :: name
info = 0
name='psi_crea_index'
call psb_erractionsave(err_act)
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
ictxt = psb_cd_get_context(desc_a)
call psb_info(ictxt,me,np)
if (np == -1) then
info = 2010
call psb_errpush(info,name)
goto 9999
endif
! allocate dependency list
! This should be computed more efficiently to save space when
! the number of processors becomes very high
dl_lda=np+1
allocate(dep_list(max(1,dl_lda),0:np),length_dl(0:np),stat=info)
if (info /= 0) then
call psb_errpush(4010,name,a_err='Allocate')
goto 9999
end if
! ...extract dependence list (ordered list of identifer process
! which every process must communcate with...
if (debug_level >= psb_debug_inner_) &
& write(debug_unit,*) me,' ',trim(name),': calling extract_dep_list'
mode = 1
call psi_extract_dep_list(desc_a%matrix_data,index_in,&
& dep_list,length_dl,np,max(1,dl_lda),mode,info)
if(info /= 0) then
call psb_errpush(4010,name,a_err='extrct_dl')
goto 9999
end if
if (debug_level >= psb_debug_inner_) &
& write(debug_unit,*) me,' ',trim(name),': from extract_dep_list',&
& me,length_dl(0),index_in(1), ':',dep_list(:length_dl(me),me)
! ...now process root contains dependence list of all processes...
if (debug_level >= psb_debug_inner_) &
& write(debug_unit,*) me,' ',trim(name),': root sorting dep list'
call psi_dl_check(dep_list,max(1,dl_lda),np,length_dl)
! ....now i can sort dependency lists.
call psi_sort_dl(dep_list,length_dl,np,info)
if(info /= 0) then
call psb_errpush(4010,name,a_err='psi_sort_dl')
goto 9999
end if
if(debug_level >= psb_debug_inner_)&
& write(debug_unit,*) me,' ',trim(name),': calling psi_desc_index',&
& size(index_out)
! Do the actual format conversion.
call psi_desc_index(desc_a,index_in,dep_list(1:,me),&
& length_dl(me),nsnd,nrcv, index_out,glob_idx,info)
if(debug_level >= psb_debug_inner_) &
& write(debug_unit,*) me,' ',trim(name),': out of psi_desc_index',&
& size(index_out)
nxch = length_dl(me)
if(info /= 0) then
call psb_errpush(4010,name,a_err='psi_desc_index')
goto 9999
end if
deallocate(dep_list,length_dl)
if(debug_level >= psb_debug_inner_) &
& write(debug_unit,*) me,' ',trim(name),': done'
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error(ictxt)
return
end if
return
end subroutine psi_crea_index