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amg4psblas/mlprec/mld_c_base_smoother_mod.f90

615 lines
18 KiB
Fortran

!!$
!!$
!!$ MLD2P4 version 2.0
!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
!!$ based on PSBLAS (Parallel Sparse BLAS version 3.0)
!!$
!!$ (C) Copyright 2008,2009,2010
!!$
!!$ Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari CNRS-IRIT, Toulouse
!!$ Pasqua D'Ambra ICAR-CNR, Naples
!!$ Daniela di Serafino Second University of Naples
!!$
!!$ 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.
!!$
!!$
! File: mld_c_base_smoother_mod.f90
!
! Module: mld_c_base_smoother_mod
!
! This module defines:
! - the mld_c_base_smoother_type data structure containing the
! smoother and related data structures;
!
! It contains routines for
! - Building and applying;
! - checking if the smoother is correctly defined;
! - printing a description of the preconditioner;
! - deallocating the preconditioner data structure.
!
module mld_c_base_smoother_mod
use mld_c_base_solver_mod
use psb_base_mod, only : psb_cspmat_type, psb_c_vect_type, psb_c_base_vect_type
!
!
!
! Type: mld_T_base_smoother_type.
!
! It holds the smoother a single level. Its only mandatory component is a solver
! object which holds a local solver; this decoupling allows to have the same solver
! e.g ILU to work with Jacobi with multiple sweeps as well as with any AS variant.
!
! type mld_T_base_smoother_type
! class(mld_T_base_solver_type), allocatable :: sv
! end type mld_T_base_smoother_type
!
! Methods:
!
! build - Compute the actual contents of the smoother; includes
! invocation of the build method on the solver component.
! free - Release memory
! apply - Apply the smoother to a vector (or to an array); includes
! invocation of the apply method on the solver component.
! 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 solver object for further processing.
! check - Sanity checks.
! sizeof - Total memory occupation in bytes
! get_nzeros - Number of nonzeros
!
!
!
type mld_c_base_smoother_type
class(mld_c_base_solver_type), allocatable :: sv
contains
procedure, pass(sm) :: check => c_base_smoother_check
procedure, pass(sm) :: dump => c_base_smoother_dmp
procedure, pass(sm) :: build => c_base_smoother_bld
procedure, pass(sm) :: apply_v => c_base_smoother_apply_vect
procedure, pass(sm) :: apply_a => c_base_smoother_apply
generic, public :: apply => apply_a, apply_v
procedure, pass(sm) :: free => c_base_smoother_free
procedure, pass(sm) :: seti => c_base_smoother_seti
procedure, pass(sm) :: setc => c_base_smoother_setc
procedure, pass(sm) :: setr => c_base_smoother_setr
generic, public :: set => seti, setc, setr
procedure, pass(sm) :: default => c_base_smoother_default
procedure, pass(sm) :: descr => c_base_smoother_descr
procedure, pass(sm) :: sizeof => c_base_smoother_sizeof
procedure, pass(sm) :: get_nzeros => c_base_smoother_get_nzeros
end type mld_c_base_smoother_type
private :: c_base_smoother_bld, c_base_smoother_apply, &
& c_base_smoother_free, c_base_smoother_seti, &
& c_base_smoother_setc, c_base_smoother_setr,&
& c_base_smoother_descr, c_base_smoother_sizeof, &
& c_base_smoother_default, c_base_smoother_check, &
& c_base_smoother_dmp, c_base_smoother_apply_vect, &
& c_base_smoother_get_nzeros
contains
!
! Function returning the size of the mld_prec_type data structure
! in bytes or in number of nonzeros of the operator(s) involved.
!
function c_base_smoother_get_nzeros(sm) result(val)
implicit none
class(mld_c_base_smoother_type), intent(in) :: sm
integer(psb_long_int_k_) :: val
integer :: i
val = 0
if (allocated(sm%sv)) &
& val = sm%sv%get_nzeros()
end function c_base_smoother_get_nzeros
function c_base_smoother_sizeof(sm) result(val)
implicit none
! Arguments
class(mld_c_base_smoother_type), intent(in) :: sm
integer(psb_long_int_k_) :: val
integer :: i
val = 0
if (allocated(sm%sv)) then
val = sm%sv%sizeof()
end if
return
end function c_base_smoother_sizeof
!
! Apply: comes in two versions, on plain arrays or on encapsulated
! vectors.
! This basic version just applies the local solver, whatever that
! is.
!
subroutine c_base_smoother_apply(alpha,sm,x,beta,y,desc_data,trans,sweeps,work,info)
use psb_base_mod
type(psb_desc_type), intent(in) :: desc_data
class(mld_c_base_smoother_type), intent(in) :: sm
complex(psb_spk_),intent(inout) :: x(:)
complex(psb_spk_),intent(inout) :: y(:)
complex(psb_spk_),intent(in) :: alpha,beta
character(len=1),intent(in) :: trans
integer, intent(in) :: sweeps
complex(psb_spk_),target, intent(inout) :: work(:)
integer, intent(out) :: info
Integer :: err_act
character(len=20) :: name='d_base_smoother_apply'
call psb_erractionsave(err_act)
info = psb_success_
if (allocated(sm%sv)) then
call sm%sv%apply(alpha,x,beta,y,desc_data,trans,work,info)
else
info = 1121
endif
if (info /= psb_success_) then
call psb_errpush(info,name)
goto 9999
end if
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine c_base_smoother_apply
subroutine c_base_smoother_apply_vect(alpha,sm,x,beta,y,desc_data,&
& trans,sweeps,work,info)
use psb_base_mod
type(psb_desc_type), intent(in) :: desc_data
class(mld_c_base_smoother_type), intent(inout) :: sm
type(psb_c_vect_type),intent(inout) :: x
type(psb_c_vect_type),intent(inout) :: y
complex(psb_spk_),intent(in) :: alpha,beta
character(len=1),intent(in) :: trans
integer, intent(in) :: sweeps
complex(psb_spk_),target, intent(inout) :: work(:)
integer, intent(out) :: info
Integer :: err_act
character(len=20) :: name='d_base_smoother_apply'
call psb_erractionsave(err_act)
info = psb_success_
if (allocated(sm%sv)) then
call sm%sv%apply(alpha,x,beta,y,desc_data,trans,work,info)
else
info = 1121
endif
if (info /= psb_success_) then
call psb_errpush(info,name)
goto 9999
end if
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine c_base_smoother_apply_vect
!
! Check:
! 1. Check that we do have a solver object
! 2. Call its check method
!
subroutine c_base_smoother_check(sm,info)
use psb_base_mod
Implicit None
! Arguments
class(mld_c_base_smoother_type), intent(inout) :: sm
integer, intent(out) :: info
Integer :: err_act
character(len=20) :: name='d_base_smoother_check'
call psb_erractionsave(err_act)
info = psb_success_
if (allocated(sm%sv)) then
call sm%sv%check(info)
else
info=3111
call psb_errpush(info,name)
goto 9999
end if
if (info /= psb_success_) goto 9999
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine c_base_smoother_check
!
! Set methods: the come in multiple versions according
! to whether we are setting with integer, real or character
! input.
! The basic rule is: if the input refers to a parameter
! of the smoother, use it, otherwise pass it to the
! solver object for further processing.
! Since there are no parameters in the base smoother
! we just pass everything to the solver object.
!
subroutine c_base_smoother_seti(sm,what,val,info)
use psb_base_mod
Implicit None
! Arguments
class(mld_c_base_smoother_type), intent(inout) :: sm
integer, intent(in) :: what
integer, intent(in) :: val
integer, intent(out) :: info
Integer :: err_act
character(len=20) :: name='d_base_smoother_seti'
call psb_erractionsave(err_act)
info = psb_success_
if (allocated(sm%sv)) then
call sm%sv%set(what,val,info)
end if
if (info /= psb_success_) goto 9999
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine c_base_smoother_seti
subroutine c_base_smoother_setc(sm,what,val,info)
use psb_base_mod
Implicit None
! Arguments
class(mld_c_base_smoother_type), intent(inout) :: sm
integer, intent(in) :: what
character(len=*), intent(in) :: val
integer, intent(out) :: info
Integer :: err_act
character(len=20) :: name='d_base_smoother_setc'
call psb_erractionsave(err_act)
info = psb_success_
if (allocated(sm%sv)) then
call sm%sv%set(what,val,info)
end if
if (info /= psb_success_) goto 9999
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine c_base_smoother_setc
subroutine c_base_smoother_setr(sm,what,val,info)
use psb_base_mod
Implicit None
! Arguments
class(mld_c_base_smoother_type), intent(inout) :: sm
integer, intent(in) :: what
real(psb_spk_), intent(in) :: val
integer, intent(out) :: info
Integer :: err_act
character(len=20) :: name='d_base_smoother_setr'
call psb_erractionsave(err_act)
info = psb_success_
if (allocated(sm%sv)) then
call sm%sv%set(what,val,info)
end if
if (info /= psb_success_) goto 9999
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine c_base_smoother_setr
!
! Build method.
! At base level we only have to pass data to the inner solver.
! AMOLD/VMOLD allow to have any relevant sparse matrix or vector
! to be stored in a given format. This is essential e.g.
! when dealing with GPUs.
!
subroutine c_base_smoother_bld(a,desc_a,sm,upd,info,amold,vmold)
use psb_base_mod
Implicit None
! Arguments
type(psb_cspmat_type), intent(in), target :: a
Type(psb_desc_type), Intent(in) :: desc_a
class(mld_c_base_smoother_type), intent(inout) :: sm
character, intent(in) :: upd
integer, intent(out) :: info
class(psb_c_base_sparse_mat), intent(in), optional :: amold
class(psb_c_base_vect_type), intent(in), optional :: vmold
Integer :: err_act
character(len=20) :: name='d_base_smoother_bld'
call psb_erractionsave(err_act)
info = psb_success_
if (allocated(sm%sv)) then
call sm%sv%build(a,desc_a,upd,info,amold=amold,vmold=vmold)
else
info = 1121
call psb_errpush(info,name)
endif
if (info /= psb_success_) goto 9999
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine c_base_smoother_bld
!
! Free method (aka destructor).
! In most cases we could do without; however
! for cases where there are data objects allocated outside
! of the Fortran RTE we need to free them explicitly.
!
! Even in that case, we could do without this if FINAL
! subroutines were supported, which is not the case
! in GNU Fortran up to 4.7.
!
subroutine c_base_smoother_free(sm,info)
use psb_base_mod
Implicit None
! Arguments
class(mld_c_base_smoother_type), intent(inout) :: sm
integer, intent(out) :: info
Integer :: err_act
character(len=20) :: name='d_base_smoother_free'
call psb_erractionsave(err_act)
info = psb_success_
if (allocated(sm%sv)) then
call sm%sv%free(info)
end if
if (info == psb_success_) deallocate(sm%sv,stat=info)
if (info /= psb_success_) then
info = psb_err_alloc_dealloc_
call psb_errpush(info,name)
goto 9999
end if
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine c_base_smoother_free
!
! Print a description
!
subroutine c_base_smoother_descr(sm,info,iout,coarse)
use psb_base_mod
Implicit None
! Arguments
class(mld_c_base_smoother_type), intent(in) :: sm
integer, intent(out) :: info
integer, intent(in), optional :: iout
logical, intent(in), optional :: coarse
! Local variables
integer :: err_act
integer :: ictxt, me, np
character(len=20), parameter :: name='mld_c_base_smoother_descr'
integer :: iout_
logical :: coarse_
call psb_erractionsave(err_act)
info = psb_success_
if (present(coarse)) then
coarse_ = coarse
else
coarse_ = .false.
end if
if (present(iout)) then
iout_ = iout
else
iout_ = 6
end if
if (.not.coarse_) &
& write(iout_,*) 'Base smoother with local solver'
if (allocated(sm%sv)) then
call sm%sv%descr(info,iout,coarse)
if (info /= psb_success_) then
info = psb_err_from_subroutine_
call psb_errpush(info,name,a_err='Local solver')
goto 9999
end if
end if
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine c_base_smoother_descr
!
! Dump
! to file, for debugging purposes.
!
subroutine c_base_smoother_dmp(sm,ictxt,level,info,prefix,head,smoother,solver)
use psb_base_mod
implicit none
class(mld_c_base_smoother_type), intent(in) :: sm
integer, intent(in) :: ictxt,level
integer, intent(out) :: info
character(len=*), intent(in), optional :: prefix, head
logical, optional, intent(in) :: smoother, solver
integer :: i, j, il1, iln, lname, lev
integer :: icontxt,iam, np
character(len=80) :: prefix_
character(len=120) :: fname ! len should be at least 20 more than
logical :: smoother_
! len of prefix_
info = 0
if (present(prefix)) then
prefix_ = trim(prefix(1:min(len(prefix),len(prefix_))))
else
prefix_ = "dump_smth_d"
end if
call psb_info(ictxt,iam,np)
if (present(smoother)) then
smoother_ = smoother
else
smoother_ = .false.
end if
lname = len_trim(prefix_)
fname = trim(prefix_)
write(fname(lname+1:lname+5),'(a,i3.3)') '_p',iam
lname = lname + 5
! At base level do nothing for the smoother
if (allocated(sm%sv)) &
& call sm%sv%dump(ictxt,level,info,solver=solver)
end subroutine c_base_smoother_dmp
!
! Set sensible defaults.
! To be called immediately after allocation
!
subroutine c_base_smoother_default(sm)
implicit none
! Arguments
class(mld_c_base_smoother_type), intent(inout) :: sm
! Do nothing for base version
if (allocated(sm%sv)) call sm%sv%default()
return
end subroutine c_base_smoother_default
end module mld_c_base_smoother_mod