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414 lines
17 KiB
Fortran
414 lines
17 KiB
Fortran
!
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!
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! AMG4PSBLAS version 1.0
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! Algebraic Multigrid Package
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! based on PSBLAS (Parallel Sparse BLAS version 3.7)
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!
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! (C) Copyright 2021
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!
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! Salvatore Filippone
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! Pasqua D'Ambra
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! Fabio Durastante
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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 AMG4PSBLAS 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 AMG4PSBLAS 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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! File: amg_c_base_smoother_mod.f90
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!
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! Module: amg_c_base_smoother_mod
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!
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! This module defines:
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! - the amg_c_base_smoother_type data structure containing the
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! smoother and related data structures;
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!
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! It contains routines for
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! - Building and applying;
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! - checking if the smoother is correctly defined;
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! - printing a description of the preconditioner;
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! - deallocating the preconditioner data structure.
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!
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! What is the difference between a smoother and a solver?
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! In the mathematics literature the two concepts are treated
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! essentially as synonymous, but here we are using them in a more
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! computer-science oriented fashion. In particular, a SMOOTHER object
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! contains a SOLVER object: the SOLVER operates locally within the
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! current process, whereas the SMOOTHER object accounts for (possible)
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! interactions between processes.
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! Some solvers (MUMPS and SuperLU_DIST) can also operate on the entire
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! distributed matrix, in which case the smoother object essentially
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! becomes transparent.
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!
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module amg_c_base_smoother_mod
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use amg_c_base_solver_mod
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use psb_base_mod, only : psb_desc_type, psb_cspmat_type, psb_epk_,&
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& psb_c_vect_type, psb_c_base_vect_type, psb_c_base_sparse_mat, &
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& psb_spk_, psb_i_base_vect_type, psb_erractionsave, psb_error_handler
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!
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!
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!
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! Type: amg_T_base_smoother_type.
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!
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! It holds the smoother a single level. Its only mandatory component is a solver
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! object which holds a local solver; this decoupling allows to have the same solver
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! e.g ILU to work with Jacobi with multiple sweeps as well as with any AS variant.
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!
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! type amg_T_base_smoother_type
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! class(amg_T_base_solver_type), allocatable :: sv
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! end type amg_T_base_smoother_type
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!
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! Methods:
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!
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! build - Compute the actual contents of the smoother; includes
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! invocation of the build method on the solver component.
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! free - Release memory
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! apply - Apply the smoother to a vector (or to an array); includes
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! invocation of the apply method on the solver component.
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! descr - Prints a description of the object.
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! default - Set default values
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! dump - Dump to file object contents
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! set - Sets various parameters; when a request is unknown
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! it is passed to the solver object for further processing.
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! check - Sanity checks.
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! sizeof - Total memory occupation in bytes
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! get_nzeros - Number of nonzeros
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! stringval - convert string to val for internal parms
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! get_fmt - short string descriptor
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! get_id - numeric id descriptro
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! get_wrksz - How many workspace vector does apply_vect need
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!
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!
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!
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type amg_c_base_smoother_type
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class(amg_c_base_solver_type), allocatable :: sv
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contains
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procedure, pass(sm) :: apply_v => amg_c_base_smoother_apply_vect
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procedure, pass(sm) :: apply_a => amg_c_base_smoother_apply
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generic, public :: apply => apply_a, apply_v
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procedure, pass(sm) :: check => amg_c_base_smoother_check
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procedure, pass(sm) :: dump => amg_c_base_smoother_dmp
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procedure, pass(sm) :: clone => amg_c_base_smoother_clone
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procedure, pass(sm) :: build => amg_c_base_smoother_bld
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procedure, pass(sm) :: cnv => amg_c_base_smoother_cnv
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procedure, pass(sm) :: free => amg_c_base_smoother_free
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procedure, pass(sm) :: clone_settings => amg_c_base_smoother_clone_settings
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procedure, pass(sm) :: clear_data => amg_c_base_smoother_clear_data
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procedure, pass(sm) :: cseti => amg_c_base_smoother_cseti
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procedure, pass(sm) :: csetc => amg_c_base_smoother_csetc
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procedure, pass(sm) :: csetr => amg_c_base_smoother_csetr
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generic, public :: set => cseti, csetc, csetr
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procedure, pass(sm) :: default => c_base_smoother_default
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procedure, pass(sm) :: descr => amg_c_base_smoother_descr
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procedure, pass(sm) :: sizeof => c_base_smoother_sizeof
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procedure, pass(sm) :: get_nzeros => c_base_smoother_get_nzeros
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procedure, pass(sm) :: get_wrksz => c_base_smoother_get_wrksize
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procedure, nopass :: stringval => amg_stringval
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procedure, nopass :: get_fmt => c_base_smoother_get_fmt
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procedure, nopass :: get_id => c_base_smoother_get_id
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end type amg_c_base_smoother_type
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private :: c_base_smoother_sizeof, c_base_smoother_get_fmt, &
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& c_base_smoother_default, c_base_smoother_get_nzeros, &
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& c_base_smoother_get_id, c_base_smoother_get_wrksize
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interface
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subroutine amg_c_base_smoother_apply(alpha,sm,x,beta,y,desc_data,&
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& trans,sweeps,work,info,init,initu)
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import :: psb_desc_type, psb_cspmat_type, psb_c_base_sparse_mat, &
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& psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
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& amg_c_base_smoother_type, psb_ipk_
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type(psb_desc_type), intent(in) :: desc_data
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class(amg_c_base_smoother_type), intent(inout) :: sm
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complex(psb_spk_),intent(inout) :: x(:)
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complex(psb_spk_),intent(inout) :: y(:)
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complex(psb_spk_),intent(in) :: alpha,beta
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character(len=1),intent(in) :: trans
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integer(psb_ipk_), intent(in) :: sweeps
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complex(psb_spk_),target, intent(inout) :: work(:)
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integer(psb_ipk_), intent(out) :: info
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character, intent(in), optional :: init
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complex(psb_spk_),intent(inout), optional :: initu(:)
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end subroutine amg_c_base_smoother_apply
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end interface
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interface
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subroutine amg_c_base_smoother_apply_vect(alpha,sm,x,beta,y,desc_data,&
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& trans,sweeps,work,wv,info,init,initu)
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import :: psb_desc_type, psb_cspmat_type, psb_c_base_sparse_mat, &
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& psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
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& amg_c_base_smoother_type, psb_ipk_
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type(psb_desc_type), intent(in) :: desc_data
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class(amg_c_base_smoother_type), intent(inout) :: sm
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type(psb_c_vect_type),intent(inout) :: x
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type(psb_c_vect_type),intent(inout) :: y
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complex(psb_spk_),intent(in) :: alpha,beta
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character(len=1),intent(in) :: trans
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integer(psb_ipk_), intent(in) :: sweeps
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complex(psb_spk_),target, intent(inout) :: work(:)
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type(psb_c_vect_type),intent(inout) :: wv(:)
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integer(psb_ipk_), intent(out) :: info
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character, intent(in), optional :: init
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type(psb_c_vect_type),intent(inout), optional :: initu
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end subroutine amg_c_base_smoother_apply_vect
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end interface
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interface
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subroutine amg_c_base_smoother_check(sm,info)
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import :: psb_desc_type, psb_cspmat_type, psb_c_base_sparse_mat, &
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& psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
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& amg_c_base_smoother_type, psb_ipk_
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! Arguments
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class(amg_c_base_smoother_type), intent(inout) :: sm
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integer(psb_ipk_), intent(out) :: info
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end subroutine amg_c_base_smoother_check
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end interface
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interface
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subroutine amg_c_base_smoother_cseti(sm,what,val,info,idx)
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import :: psb_desc_type, psb_cspmat_type, psb_c_base_sparse_mat, &
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& psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
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& amg_c_base_smoother_type, psb_ipk_
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! Arguments
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class(amg_c_base_smoother_type), intent(inout) :: sm
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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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end subroutine amg_c_base_smoother_cseti
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end interface
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interface
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subroutine amg_c_base_smoother_csetc(sm,what,val,info,idx)
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import :: psb_desc_type, psb_cspmat_type, psb_c_base_sparse_mat, &
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& psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
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& amg_c_base_smoother_type, psb_ipk_
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class(amg_c_base_smoother_type), intent(inout) :: sm
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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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end subroutine amg_c_base_smoother_csetc
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end interface
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interface
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subroutine amg_c_base_smoother_csetr(sm,what,val,info,idx)
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import :: psb_desc_type, psb_cspmat_type, psb_c_base_sparse_mat, &
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& psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
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& amg_c_base_smoother_type, psb_ipk_
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! Arguments
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class(amg_c_base_smoother_type), intent(inout) :: sm
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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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end subroutine amg_c_base_smoother_csetr
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end interface
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interface
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subroutine amg_c_base_smoother_bld(a,desc_a,sm,info,amold,vmold,imold)
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import :: psb_desc_type, psb_cspmat_type, psb_c_base_sparse_mat, &
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& psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
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& amg_c_base_smoother_type, psb_ipk_, psb_i_base_vect_type
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! Arguments
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type(psb_cspmat_type), intent(inout), target :: a
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Type(psb_desc_type), Intent(inout) :: desc_a
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class(amg_c_base_smoother_type), intent(inout) :: sm
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integer(psb_ipk_), intent(out) :: info
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class(psb_c_base_sparse_mat), intent(in), optional :: amold
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class(psb_c_base_vect_type), intent(in), optional :: vmold
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class(psb_i_base_vect_type), intent(in), optional :: imold
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end subroutine amg_c_base_smoother_bld
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end interface
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interface
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subroutine amg_c_base_smoother_cnv(sm,info,amold,vmold,imold)
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import :: psb_c_base_sparse_mat, psb_c_base_vect_type, psb_spk_, &
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& amg_c_base_smoother_type, psb_ipk_, psb_i_base_vect_type
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! Arguments
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class(amg_c_base_smoother_type), intent(inout) :: sm
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integer(psb_ipk_), intent(out) :: info
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class(psb_c_base_sparse_mat), intent(in), optional :: amold
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class(psb_c_base_vect_type), intent(in), optional :: vmold
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class(psb_i_base_vect_type), intent(in), optional :: imold
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end subroutine amg_c_base_smoother_cnv
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end interface
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interface
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subroutine amg_c_base_smoother_free(sm,info)
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import :: psb_desc_type, psb_cspmat_type, psb_c_base_sparse_mat, &
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& psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
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& amg_c_base_smoother_type, psb_ipk_
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! Arguments
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class(amg_c_base_smoother_type), intent(inout) :: sm
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integer(psb_ipk_), intent(out) :: info
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end subroutine amg_c_base_smoother_free
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end interface
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interface
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subroutine amg_c_base_smoother_descr(sm,info,iout,coarse,prefix)
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import :: psb_desc_type, psb_cspmat_type, psb_c_base_sparse_mat, &
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& psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
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& amg_c_base_smoother_type, psb_ipk_
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! Arguments
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class(amg_c_base_smoother_type), intent(in) :: sm
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_), intent(in), optional :: iout
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logical, intent(in), optional :: coarse
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character(len=*), intent(in), optional :: prefix
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end subroutine amg_c_base_smoother_descr
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end interface
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interface
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subroutine amg_c_base_smoother_dmp(sm,desc,level,info,prefix,head,smoother,solver,global_num)
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import :: psb_desc_type, psb_cspmat_type, psb_c_base_sparse_mat, &
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& psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
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& amg_c_base_smoother_type, psb_ipk_
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class(amg_c_base_smoother_type), intent(in) :: sm
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type(psb_desc_type), intent(in) :: desc
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integer(psb_ipk_), intent(in) :: level
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integer(psb_ipk_), intent(out) :: info
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character(len=*), intent(in), optional :: prefix, head
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logical, optional, intent(in) :: smoother, solver, global_num
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end subroutine amg_c_base_smoother_dmp
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end interface
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interface
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subroutine amg_c_base_smoother_clone(sm,smout,info)
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import :: psb_desc_type, psb_cspmat_type, psb_c_base_sparse_mat, &
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& psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
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& amg_c_base_smoother_type, psb_ipk_
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Implicit None
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! Arguments
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class(amg_c_base_smoother_type), intent(inout) :: sm
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class(amg_c_base_smoother_type), allocatable, intent(inout) :: smout
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integer(psb_ipk_), intent(out) :: info
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end subroutine amg_c_base_smoother_clone
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end interface
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interface
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subroutine amg_c_base_smoother_clone_settings(sm,smout,info)
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import :: psb_desc_type, psb_cspmat_type, psb_c_base_sparse_mat, &
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& psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
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& amg_c_base_smoother_type, psb_ipk_
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Implicit None
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! Arguments
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class(amg_c_base_smoother_type), intent(inout) :: sm
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class(amg_c_base_smoother_type), intent(inout) :: smout
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integer(psb_ipk_), intent(out) :: info
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end subroutine amg_c_base_smoother_clone_settings
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end interface
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interface
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subroutine amg_c_base_smoother_clear_data(sm,info)
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import :: psb_desc_type, psb_cspmat_type, psb_c_base_sparse_mat, &
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& psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
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& amg_c_base_smoother_type, psb_ipk_
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Implicit None
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! Arguments
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class(amg_c_base_smoother_type), intent(inout) :: sm
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integer(psb_ipk_), intent(out) :: info
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end subroutine amg_c_base_smoother_clear_data
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end interface
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contains
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!
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! Function returning the size of the amg_prec_type data structure
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! in bytes or in number of nonzeros of the operator(s) involved.
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!
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function c_base_smoother_get_nzeros(sm) result(val)
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implicit none
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class(amg_c_base_smoother_type), intent(in) :: sm
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integer(psb_epk_) :: val
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integer(psb_ipk_) :: i
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val = 0
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if (allocated(sm%sv)) &
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& val = sm%sv%get_nzeros()
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end function c_base_smoother_get_nzeros
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function c_base_smoother_sizeof(sm) result(val)
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implicit none
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! Arguments
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class(amg_c_base_smoother_type), intent(in) :: sm
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integer(psb_epk_) :: val
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integer(psb_ipk_) :: i
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val = 0
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if (allocated(sm%sv)) then
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val = sm%sv%sizeof()
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end if
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return
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end function c_base_smoother_sizeof
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!
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! Set sensible defaults.
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! To be called immediately after allocation
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!
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subroutine c_base_smoother_default(sm)
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implicit none
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! Arguments
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class(amg_c_base_smoother_type), intent(inout) :: sm
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! Do nothing for base version
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if (allocated(sm%sv)) call sm%sv%default()
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return
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end subroutine c_base_smoother_default
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function c_base_smoother_get_wrksize(sm) result(val)
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implicit none
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class(amg_c_base_smoother_type), intent(inout) :: sm
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integer(psb_ipk_) :: val
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val = 0
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if (allocated(sm%sv)) val = val + sm%sv%get_wrksz()
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end function c_base_smoother_get_wrksize
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function c_base_smoother_get_fmt() result(val)
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implicit none
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character(len=32) :: val
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val = "Base smoother"
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end function c_base_smoother_get_fmt
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function c_base_smoother_get_id() result(val)
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implicit none
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integer(psb_ipk_) :: val
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val = amg_base_smooth_
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end function c_base_smoother_get_id
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end module amg_c_base_smoother_mod
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