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psblas3/util/psb_s_mat_dist_mod.f90

155 lines
6.5 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.
!
!
module psb_s_mat_dist_mod
use psb_base_mod, only : psb_ipk_, psb_spk_, psb_desc_type, psb_parts, &
& psb_sspmat_type, psb_s_base_sparse_mat, psb_s_vect_type, &
& psb_lsspmat_type, psb_ctxt_type
interface psb_matdist
subroutine psb_smatdist(a_glob, a, ctxt, desc_a,&
& info, parts, vg, vsz, inroot,fmt,mold)
!
! an utility subroutine to distribute a matrix among processors
! according to a user defined data distribution, using
! sparse matrix subroutines.
!
! type(psb_sspmat) :: a_glob
! on entry: this contains the global sparse matrix as follows:
!
! type(psb_sspmat_type) :: a
! on exit : this will contain the local sparse matrix.
!
! interface parts
! ! .....user passed subroutine.....
! subroutine parts(global_indx,n,np,pv,nv)
! implicit none
! integer(psb_ipk_), intent(in) :: global_indx, n, np
! integer(psb_ipk_), intent(out) :: nv
! integer(psb_ipk_), intent(out) :: pv(*)
!
! end subroutine parts
! end interface
! on entry: subroutine providing user defined data distribution.
! for each global_indx the subroutine should return
! the list pv of all processes owning the row with
! that index; the list will contain nv entries.
! usually nv=1; if nv >1 then we have an overlap in the data
! distribution.
!
! integer(psb_ipk_) :: ctxt
! on entry: the PSBLAS parallel environment context.
!
! type (desc_type) :: desc_a
! on exit : the updated array descriptor
!
!
! integer(psb_ipk_), optional :: inroot
! on entry: specifies processor holding a_glob. default: 0
! on exit : unchanged.
!
import
implicit none
! parameters
type(psb_sspmat_type) :: a_glob
type(psb_ctxt_type) :: ctxt
type(psb_sspmat_type) :: a
type(psb_desc_type) :: desc_a
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_), optional :: inroot
character(len=*), optional :: fmt
class(psb_s_base_sparse_mat), optional :: mold
procedure(psb_parts), optional :: parts
integer(psb_ipk_), optional :: vg(:)
integer(psb_ipk_), optional :: vsz(:)
end subroutine psb_smatdist
subroutine psb_lsmatdist(a_glob, a, ctxt, desc_a,&
& info, parts, vg, vsz, inroot,fmt,mold)
!
! an utility subroutine to distribute a matrix among processors
! according to a user defined data distribution, using
! sparse matrix subroutines.
!
! type(psb_lsspmat) :: a_glob
! on entry: this contains the global sparse matrix as follows:
!
! type(psb_sspmat_type) :: a
! on exit : this will contain the local sparse matrix.
!
! interface parts
! ! .....user passed subroutine.....
! subroutine parts(global_indx,n,np,pv,nv)
! implicit none
! integer(psb_ipk_), intent(in) :: global_indx, n, np
! integer(psb_ipk_), intent(out) :: nv
! integer(psb_ipk_), intent(out) :: pv(*)
!
! end subroutine parts
! end interface
! on entry: subroutine providing user defined data distribution.
! for each global_indx the subroutine should return
! the list pv of all processes owning the row with
! that index; the list will contain nv entries.
! usually nv=1; if nv >1 then we have an overlap in the data
! distribution.
!
! integer(psb_ipk_) :: ctxt
! on entry: the PSBLAS parallel environment context.
!
! type (desc_type) :: desc_a
! on exit : the updated array descriptor
!
!
! integer(psb_ipk_), optional :: inroot
! on entry: specifies processor holding a_glob. default: 0
! on exit : unchanged.
!
import
implicit none
! parameters
type(psb_lsspmat_type) :: a_glob
type(psb_ctxt_type) :: ctxt
type(psb_sspmat_type) :: a
type(psb_desc_type) :: desc_a
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_), optional :: inroot
character(len=*), optional :: fmt
class(psb_s_base_sparse_mat), optional :: mold
procedure(psb_parts), optional :: parts
integer(psb_ipk_), optional :: vg(:)
integer(psb_ipk_), optional :: vsz(:)
end subroutine psb_lsmatdist
end interface
end module psb_s_mat_dist_mod