You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
129 lines
6.0 KiB
Fortran
129 lines
6.0 KiB
Fortran
!
|
|
!
|
|
! MLD2P4 version 2.1
|
|
! 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 version only differs from the
|
|
! basic decoupled aggregation algorithm because it works on (the
|
|
! pattern of) A+A^T instead of A.
|
|
!
|
|
! M. Brezina and P. Vanek, A black-box iterative solver based on a
|
|
! two-level Schwarz method, Computing, 63 (1999), 233-263.
|
|
! P. D'Ambra, D. di Serafino and S. Filippone, On the development of
|
|
! PSBLAS-based parallel two-level Schwarz preconditioners, Appl. Num. Math.
|
|
! 57 (2007), 1181-1196.
|
|
!
|
|
module mld_d_symdec_aggregator_mod
|
|
|
|
use mld_d_base_aggregator_mod
|
|
!
|
|
! 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
|
|
!
|
|
!
|
|
type, extends(mld_d_base_aggregator_type) :: mld_d_symdec_aggregator_type
|
|
|
|
contains
|
|
procedure, pass(ag) :: tprol => mld_d_symdec_aggregator_build_tprol
|
|
procedure, nopass :: fmt => mld_d_symdec_aggregator_fmt
|
|
end type mld_d_symdec_aggregator_type
|
|
|
|
|
|
interface
|
|
subroutine mld_d_symdec_aggregator_build_tprol(ag,parms,a,desc_a,ilaggr,nlaggr,op_prol,info)
|
|
import :: mld_d_symdec_aggregator_type, psb_desc_type, psb_dspmat_type, psb_dpk_, &
|
|
& psb_ipk_, psb_long_int_k_, mld_dml_parms
|
|
implicit none
|
|
class(mld_d_symdec_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_symdec_aggregator_build_tprol
|
|
end interface
|
|
|
|
|
|
contains
|
|
|
|
function mld_d_symdec_aggregator_fmt() result(val)
|
|
implicit none
|
|
character(len=32) :: val
|
|
|
|
val = "Symmetric Decoupled aggregation"
|
|
end function mld_d_symdec_aggregator_fmt
|
|
|
|
end module mld_d_symdec_aggregator_mod
|