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321 lines
11 KiB
Fortran
321 lines
11 KiB
Fortran
!
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!
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! MLD2P4 version 2.2
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! MultiLevel Domain Decomposition Parallel Preconditioners Package
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! based on PSBLAS (Parallel Sparse BLAS version 3.5)
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!
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! (C) Copyright 2008-2018
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!
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! Salvatore Filippone
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! Pasqua D'Ambra
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! Daniela di Serafino
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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 MLD2P4 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 MLD2P4 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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! The aggregator object hosts the aggregation method for building
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! the multilevel hierarchy.
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!
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module mld_s_base_aggregator_mod
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use mld_base_prec_type, only : mld_sml_parms
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use psb_base_mod, only : psb_sspmat_type, psb_s_vect_type, &
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& psb_s_base_vect_type, psb_slinmap_type, psb_spk_, &
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& psb_ipk_, psb_long_int_k_, psb_desc_type, psb_i_base_vect_type, &
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& psb_erractionsave, psb_error_handler, psb_success_
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!
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!
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!
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!> \class mld_s_base_aggregator_type
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!!
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!! It is the data type containing the basic interface definition for
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!! building a multigrid hierarchy by aggregation. The base object has no attributes,
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!! it is intended to be essentially an abstract type.
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!!
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!!
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!! type mld_s_base_aggregator_type
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!! end type
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!!
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!!
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!! Methods:
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!!
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!! bld_tprol - Build a tentative prolongator
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!!
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!! mat_asb - Build the final prolongator/restrictor and the
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!! coarse matrix ac
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!!
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!! update_next - Transfer information to the next level; default is
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!! to do nothing, i.e. aggregators at different
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!! levels are independent.
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!!
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!! default - Apply defaults
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!! set_aggr_type - For aggregator that have internal options.
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!! fmt - Return a short string description
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!! descr - Print a more detailed description
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!!
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!! cseti, csetr, csetc - Set internal parameters, if any
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!
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type mld_s_base_aggregator_type
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contains
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procedure, pass(ag) :: bld_tprol => mld_s_base_aggregator_build_tprol
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procedure, pass(ag) :: mat_asb => mld_s_base_aggregator_mat_asb
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procedure, pass(ag) :: update_next => mld_s_base_aggregator_update_next
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procedure, pass(ag) :: clone => mld_s_base_aggregator_clone
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procedure, pass(ag) :: free => mld_s_base_aggregator_free
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procedure, pass(ag) :: default => mld_s_base_aggregator_default
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procedure, pass(ag) :: descr => mld_s_base_aggregator_descr
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procedure, pass(ag) :: set_aggr_type => mld_s_base_aggregator_set_aggr_type
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procedure, nopass :: fmt => mld_s_base_aggregator_fmt
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procedure, pass(ag) :: cseti => mld_s_base_aggregator_cseti
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procedure, pass(ag) :: csetr => mld_s_base_aggregator_csetr
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procedure, pass(ag) :: csetc => mld_s_base_aggregator_csetc
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generic, public :: set => cseti, csetr, csetc
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end type mld_s_base_aggregator_type
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contains
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subroutine mld_s_base_aggregator_cseti(ag,what,val,info,idx)
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Implicit None
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! Arguments
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class(mld_s_base_aggregator_type), intent(inout) :: ag
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character(len=*), intent(in) :: what
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integer(psb_ipk_), intent(in) :: val
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_), intent(in), optional :: idx
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! Do nothing
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info = 0
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end subroutine mld_s_base_aggregator_cseti
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subroutine mld_s_base_aggregator_csetr(ag,what,val,info,idx)
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Implicit None
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! Arguments
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class(mld_s_base_aggregator_type), intent(inout) :: ag
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character(len=*), intent(in) :: what
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real(psb_spk_), intent(in) :: val
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_), intent(in), optional :: idx
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! Do nothing
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info = 0
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end subroutine mld_s_base_aggregator_csetr
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subroutine mld_s_base_aggregator_csetc(ag,what,val,info,idx)
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Implicit None
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! Arguments
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class(mld_s_base_aggregator_type), intent(inout) :: ag
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character(len=*), intent(in) :: what
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character(len=*), intent(in) :: val
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_), intent(in), optional :: idx
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! Do nothing
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info = 0
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end subroutine mld_s_base_aggregator_csetc
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subroutine mld_s_base_aggregator_update_next(ag,agnext,info)
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implicit none
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class(mld_s_base_aggregator_type), target, intent(inout) :: ag, agnext
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integer(psb_ipk_), intent(out) :: info
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!
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! Base version does nothing.
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!
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info = 0
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end subroutine mld_s_base_aggregator_update_next
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subroutine mld_s_base_aggregator_clone(ag,agnext,info)
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implicit none
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class(mld_s_base_aggregator_type), intent(inout) :: ag
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class(mld_s_base_aggregator_type), allocatable, intent(inout) :: agnext
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integer(psb_ipk_), intent(out) :: info
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info = 0
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if (allocated(agnext)) then
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call agnext%free(info)
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if (info == 0) deallocate(agnext,stat=info)
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end if
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if (info /= 0) return
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allocate(agnext,source=ag,stat=info)
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end subroutine mld_s_base_aggregator_clone
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subroutine mld_s_base_aggregator_free(ag,info)
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implicit none
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class(mld_s_base_aggregator_type), intent(inout) :: ag
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integer(psb_ipk_), intent(out) :: info
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info = psb_success_
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return
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end subroutine mld_s_base_aggregator_free
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subroutine mld_s_base_aggregator_default(ag)
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implicit none
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class(mld_s_base_aggregator_type), intent(inout) :: ag
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! Here we need do nothing
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return
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end subroutine mld_s_base_aggregator_default
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function mld_s_base_aggregator_fmt() result(val)
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implicit none
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character(len=32) :: val
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val = "Default aggregator "
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end function mld_s_base_aggregator_fmt
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subroutine mld_s_base_aggregator_descr(ag,parms,iout,info)
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implicit none
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class(mld_s_base_aggregator_type), intent(in) :: ag
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type(mld_sml_parms), intent(in) :: parms
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integer(psb_ipk_), intent(in) :: iout
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integer(psb_ipk_), intent(out) :: info
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write(iout,*) 'Aggregator object type: ',ag%fmt()
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call parms%mldescr(iout,info)
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return
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end subroutine mld_s_base_aggregator_descr
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subroutine mld_s_base_aggregator_set_aggr_type(ag,parms,info)
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implicit none
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class(mld_s_base_aggregator_type), intent(inout) :: ag
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type(mld_sml_parms), intent(in) :: parms
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integer(psb_ipk_), intent(out) :: info
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! Do nothing
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return
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end subroutine mld_s_base_aggregator_set_aggr_type
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!
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!> Function bld_tprol:
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!! \memberof mld_s_base_aggregator_type
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!! \brief Build a tentative prolongator.
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!! The routine will map the local matrix entries to aggregates.
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!! The mapping is store in ILAGGR; for each local row index I,
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!! ILAGGR(I) contains the index of the aggregate to which index I
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!! will contribute, in global numbering.
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!! Many aggregation produce a binary tentative prolongator, but some
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!! do not, hence we also need the OP_PROL output.
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!!
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!! \param ag The input aggregator object
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!! \param parms The auxiliary parameters object
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!! \param a The local matrix part
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!! \param desc_a The descriptor
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!! \param ilaggr Output aggregation map
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!! \param nlaggr Sizes of ilaggr on all processes
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!! \param op_prol The tentative prolongator operator
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!! \param info Return code
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!!
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!
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subroutine mld_s_base_aggregator_build_tprol(ag,parms,a,desc_a,ilaggr,nlaggr,op_prol,info)
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use psb_base_mod
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implicit none
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class(mld_s_base_aggregator_type), target, intent(inout) :: ag
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type(mld_sml_parms), intent(inout) :: parms
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type(psb_sspmat_type), intent(in) :: a
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type(psb_desc_type), intent(in) :: desc_a
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integer(psb_ipk_), allocatable, intent(out) :: ilaggr(:),nlaggr(:)
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type(psb_sspmat_type), intent(out) :: op_prol
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_) :: err_act
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character(len=20) :: name='s_base_aggregator_build_tprol'
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call psb_erractionsave(err_act)
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info = psb_err_missing_override_method_
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call psb_errpush(info,name)
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goto 9999
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(err_act)
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return
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end subroutine mld_s_base_aggregator_build_tprol
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!
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!> Function mat_asb
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!! \memberof mld_s_base_aggregator_type
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!! \brief Build prolongator/restrictor/coarse matrix.
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!!
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!!
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!! \param ag The input aggregator object
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!! \param parms The auxiliary parameters object
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!! \param a The local matrix part
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!! \param desc_a The descriptor
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!! \param ilaggr Aggregation map
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!! \param nlaggr Sizes of ilaggr on all processes
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!! \param ac On output the coarse matrix
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!! \param op_prol On input, the tentative prolongator operator, on output
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!! the final prolongator
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!! \param op_restr On output, the restrictor operator;
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!! in many cases it is the transpose of the prolongator.
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!! \param info Return code
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!!
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subroutine mld_s_base_aggregator_mat_asb(ag,parms,a,desc_a,ilaggr,nlaggr,ac,&
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& op_prol,op_restr,info)
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use psb_base_mod
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implicit none
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class(mld_s_base_aggregator_type), target, intent(inout) :: ag
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type(mld_sml_parms), intent(inout) :: parms
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type(psb_sspmat_type), intent(in) :: a
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type(psb_desc_type), intent(in) :: desc_a
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integer(psb_ipk_), intent(inout) :: ilaggr(:), nlaggr(:)
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type(psb_sspmat_type), intent(inout) :: op_prol
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type(psb_sspmat_type), intent(out) :: ac,op_restr
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_) :: err_act
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character(len=20) :: name='s_base_aggregator_mat_asb'
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call psb_erractionsave(err_act)
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info = psb_err_missing_override_method_
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call psb_errpush(info,name)
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goto 9999
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(err_act)
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return
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end subroutine mld_s_base_aggregator_mat_asb
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end module mld_s_base_aggregator_mod
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