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amg4psblas/tests/Bcmatch/mld_d_bcmatch_aggregator_mo...

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Fortran

!
!
! MLD2P4 version 2.2
! MultiLevel Domain Decomposition Parallel Preconditioners Package
! based on PSBLAS (Parallel Sparse BLAS version 3.5)
!
! (C) Copyright 2008, 2010, 2012, 2015, 2017 , 2017
!
! Salvatore Filippone Cranfield University
! Ambra Abdullahi Hassan University of Rome Tor Vergata
! Pasqua D'Ambra IAC-CNR, Naples, IT
! Daniela di Serafino University of Campania "L. Vanvitelli", Caserta, IT
!
! 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 MLD2P4 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 MLD2P4 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.
!
!
!
!
! The aggregator object hosts the aggregation method for building
! the multilevel hierarchy. This variant is based on the hybrid method
! presented in
!
! S. Gratton, P. Henon, P. Jiranek and X. Vasseur:
! Reducing complexity of algebraic multigrid by aggregation
! Numerical Lin. Algebra with Applications, 2016, 23:501-518
!
!
! sm - class(mld_T_base_smoother_type), allocatable
! The current level preconditioner (aka smoother).
! parms - type(mld_RTml_parms)
! The parameters defining the multilevel strategy.
! ac - The local part of the current-level matrix, built by
! coarsening the previous-level matrix.
! desc_ac - type(psb_desc_type).
! The communication descriptor associated to the matrix
! stored in ac.
! base_a - type(psb_Tspmat_type), pointer.
! Pointer (really a pointer!) to the local part of the current
! matrix (so we have a unified treatment of residuals).
! We need this to avoid passing explicitly the current matrix
! to the routine which applies the preconditioner.
! base_desc - type(psb_desc_type), pointer.
! Pointer to the communication descriptor associated to the
! matrix pointed by base_a.
! map - Stores the maps (restriction and prolongation) between the
! vector spaces associated to the index spaces of the previous
! and current levels.
!
! Methods:
! Most methods follow the encapsulation hierarchy: they take whatever action
! is appropriate for the current object, then call the corresponding method for
! the contained object.
! As an example: the descr() method prints out a description of the
! level. It starts by invoking the descr() method of the parms object,
! then calls the descr() method of the smoother object.
!
! descr - Prints a description of the object.
! default - Set default values
! dump - Dump to file object contents
! set - Sets various parameters; when a request is unknown
! it is passed to the smoother object for further processing.
! check - Sanity checks.
! sizeof - Total memory occupation in bytes
! get_nzeros - Number of nonzeros
!
!
module bcm_csr_type_mod
use iso_c_binding
type, bind(c):: bcm_Vector
type(c_ptr) :: data
integer(c_int) :: size
integer(c_int) :: owns_data
end type
type, bind(c):: bcm_CSRMatrix
type(c_ptr) :: i
type(c_ptr) :: j
integer(c_int) :: num_rows
integer(c_int) :: num_cols
integer(c_int) :: num_nonzeros
integer(c_int) :: owns_data
type(c_ptr) :: data
end type
end module bcm_csr_type_mod
module mld_d_bcmatch_aggregator_mod
use mld_d_base_aggregator_mod
use bcm_csr_type_mod
type, extends(mld_d_base_aggregator_type) :: mld_d_bcmatch_aggregator_type
integer(psb_ipk_) :: matching_alg
integer(psb_ipk_) :: n_sweeps
real(psb_dpk_), allocatable :: w_tmp(:)
type(bcm_Vector) :: w_par
integer(psb_ipk_) :: max_csize
integer(psb_ipk_) :: max_nlevels
!type(psb_d_vect_type) :: w
contains
procedure, pass(ag) :: bld_tprol => mld_d_bcmatch_aggregator_build_tprol
procedure, pass(ag) :: set => d_bcmatch_aggr_cseti
procedure, pass(ag) :: default =>d_bcmatch_aggr_set_default
procedure, pass(ag) :: mat_asb => mld_d_bcmatch_aggregator_mat_asb
procedure, pass(ag) :: update_level => d_bcmatch_aggregator_update_level
!!$ procedure, pass(ag) :: clone => mld_d_base_aggregator_clone
!!$ procedure, pass(ag) :: free => mld_d_bcmatch_aggregator_free
!!$ procedure, pass(ag) :: default => mld_d_base_aggregator_default
procedure, nopass :: fmt => mld_d_bcmatch_aggregator_fmt
end type mld_d_bcmatch_aggregator_type
interface
subroutine mld_d_bcmatch_aggregator_build_tprol(ag,parms,a,desc_a,ilaggr,nlaggr,op_prol,info)
import :: mld_d_bcmatch_aggregator_type, psb_desc_type, psb_dspmat_type, psb_dpk_, &
& psb_ipk_, psb_long_int_k_, mld_dml_parms
implicit none
class(mld_d_bcmatch_aggregator_type), target, intent(inout) :: ag
type(mld_dml_parms), intent(inout) :: parms
type(psb_dspmat_type), intent(in) :: a
type(psb_desc_type), intent(in) :: desc_a
integer(psb_ipk_), allocatable, intent(out) :: ilaggr(:),nlaggr(:)
type(psb_dspmat_type), intent(out) :: op_prol
integer(psb_ipk_), intent(out) :: info
end subroutine mld_d_bcmatch_aggregator_build_tprol
end interface
interface
subroutine mld_d_bcmatch_aggregator_mat_asb(ag,parms,a,desc_a,ilaggr,nlaggr,ac,&
& op_prol,op_restr,info)
import :: mld_d_bcmatch_aggregator_type, psb_desc_type, psb_dspmat_type, psb_dpk_, &
& psb_ipk_, psb_long_int_k_, mld_dml_parms
implicit none
class(mld_d_bcmatch_aggregator_type), target, intent(inout) :: ag
type(mld_dml_parms), intent(inout) :: parms
type(psb_dspmat_type), intent(in) :: a
type(psb_desc_type), intent(in) :: desc_a
integer(psb_ipk_), intent(inout) :: ilaggr(:), nlaggr(:)
type(psb_dspmat_type), intent(inout) :: op_prol
type(psb_dspmat_type), intent(out) :: ac,op_restr
integer(psb_ipk_), intent(out) :: info
end subroutine mld_d_bcmatch_aggregator_mat_asb
end interface
contains
function mld_d_bcmatch_aggregator_fmt() result(val)
implicit none
character(len=32) :: val
val = "BootCMatch aggregation"
end function mld_d_bcmatch_aggregator_fmt
subroutine d_bcmatch_aggregator_update_level(ag,agnext,info)
implicit none
class(mld_d_bcmatch_aggregator_type), target, intent(inout) :: ag
class(mld_d_base_aggregator_type), target, intent(inout) :: agnext
integer(psb_ipk_), intent(out) :: info
!
!
select type(agnext)
type is (mld_d_bcmatch_aggregator_type)
agnext%matching_alg=ag%matching_alg
agnext%n_sweeps=ag%n_sweeps
agnext%max_csize=ag%max_csize
agnext%max_nlevels=ag%max_nlevels
agnext%w_par=ag%w_par
end select
info = 0
end subroutine d_bcmatch_aggregator_update_level
subroutine d_bcmatch_aggr_cseti(ag,what,val,info)
Implicit None
! Arguments
class(mld_d_bcmatch_aggregator_type), intent(inout) :: ag
character(len=*), intent(in) :: what
integer(psb_ipk_), intent(in) :: val
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_) :: err_act, iwhat
character(len=20) :: name='d_bcmatch_aggr_cseti'
info = psb_success_
select case(what)
case('BCM_MATCH_ALG')
ag%matching_alg=val
case('BCM_SWEEPS')
ag%n_sweeps=val
case('BCM_MAX_CSIZE')
ag%max_csize=val
case('BCM_MAX_NLEVELS')
ag%max_nlevels=val
case('BCM_W_SIZE')
ag%w_par%size=val
ag%w_par%owns_data=0
allocate(ag%w_tmp(val))
ag%w_tmp = 1.0_psb_dpk_
call set_cloc(ag%w_tmp, ag%w_par)
case default
end select
return
contains
subroutine set_cloc(vect,w_par)
real(psb_dpk_), target :: vect(:)
type(bcm_Vector) :: w_par
w_par%data = c_loc(vect)
end subroutine set_cloc
end subroutine d_bcmatch_aggr_cseti
subroutine d_bcmatch_aggr_set_default(ag)
Implicit None
! Arguments
class(mld_d_bcmatch_aggregator_type), intent(inout) :: ag
character(len=20) :: name='d_bcmatch_aggr_set_default'
ag%matching_alg=0
ag%n_sweeps=1
ag%max_nlevels=36
ag%max_csize=10
return
end subroutine d_bcmatch_aggr_set_default
!!$ subroutine d_bcmatch_aggregator_free(ag,info)
!!$ implicit none
!!$ class(mld_d_bcmatch_aggregator_type), target, intent(inout) :: ag
!!$ integer(psb_ipk_), intent(out) :: info
!!$
!!$ info = 0
!!$ end subroutine d_bcmatch_aggregator_free
end module mld_d_bcmatch_aggregator_mod