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.
amg4psblas/amgprec/amg_z_slu_solver.F90

456 lines
14 KiB
Fortran

!
!
! AMG4PSBLAS version 1.0
! Algebraic Multigrid Package
! based on PSBLAS (Parallel Sparse BLAS version 3.7)
!
! (C) Copyright 2021
!
! Salvatore Filippone
! Pasqua D'Ambra
! Fabio Durastante
!
! 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 AMG4PSBLAS 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 AMG4PSBLAS 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: amg_z_slu_solver_mod.f90
!
! Module: amg_z_slu_solver_mod
!
! This module defines:
! - the amg_z_slu_solver_type data structure containing the ingredients
! to interface with the SuperLU package.
! 1. The factorization is restricted to the diagonal block of the
! current image.
!
module amg_z_slu_solver
use iso_c_binding
use amg_z_base_solver_mod
#if defined(IPK8)
type, extends(amg_z_base_solver_type) :: amg_z_slu_solver_type
end type amg_z_slu_solver_type
#else
type, extends(amg_z_base_solver_type) :: amg_z_slu_solver_type
type(c_ptr) :: lufactors=c_null_ptr
integer(c_long_long) :: symbsize=0, numsize=0
contains
procedure, pass(sv) :: build => z_slu_solver_bld
procedure, pass(sv) :: apply_a => z_slu_solver_apply
procedure, pass(sv) :: apply_v => z_slu_solver_apply_vect
procedure, pass(sv) :: free => z_slu_solver_free
procedure, pass(sv) :: clear_data => z_slu_solver_clear_data
procedure, pass(sv) :: descr => z_slu_solver_descr
procedure, pass(sv) :: sizeof => z_slu_solver_sizeof
procedure, nopass :: get_fmt => z_slu_solver_get_fmt
procedure, nopass :: get_id => z_slu_solver_get_id
final :: z_slu_solver_finalize
end type amg_z_slu_solver_type
private :: z_slu_solver_bld, z_slu_solver_apply, &
& z_slu_solver_free, z_slu_solver_descr, &
& z_slu_solver_sizeof, z_slu_solver_apply_vect, &
& z_slu_solver_get_fmt, z_slu_solver_get_id, &
& z_slu_solver_clear_data
private :: z_slu_solver_finalize
interface
function amg_zslu_fact(n,nnz,values,rowptr,colind,&
& lufactors)&
& bind(c,name='amg_zslu_fact') result(info)
use iso_c_binding
integer(c_int), value :: n,nnz
integer(c_int) :: info
integer(c_int) :: rowptr(*),colind(*)
complex(c_double_complex) :: values(*)
type(c_ptr) :: lufactors
end function amg_zslu_fact
end interface
interface
function amg_zslu_solve(itrans,n,nrhs,b,ldb,lufactors)&
& bind(c,name='amg_zslu_solve') result(info)
use iso_c_binding
integer(c_int) :: info
integer(c_int), value :: itrans,n,nrhs,ldb
complex(c_double_complex) :: b(ldb,*)
type(c_ptr), value :: lufactors
end function amg_zslu_solve
end interface
interface
function amg_zslu_free(lufactors)&
& bind(c,name='amg_zslu_free') result(info)
use iso_c_binding
integer(c_int) :: info
type(c_ptr), value :: lufactors
end function amg_zslu_free
end interface
contains
subroutine z_slu_solver_apply(alpha,sv,x,beta,y,desc_data,&
& trans,work,info,init,initu)
use psb_base_mod
implicit none
type(psb_desc_type), intent(in) :: desc_data
class(amg_z_slu_solver_type), intent(inout) :: sv
complex(psb_dpk_),intent(inout) :: x(:)
complex(psb_dpk_),intent(inout) :: y(:)
complex(psb_dpk_),intent(in) :: alpha,beta
character(len=1),intent(in) :: trans
complex(psb_dpk_),target, intent(inout) :: work(:)
integer, intent(out) :: info
character, intent(in), optional :: init
complex(psb_dpk_),intent(inout), optional :: initu(:)
integer :: n_row,n_col
complex(psb_dpk_), pointer :: ww(:)
type(psb_ctxt_type) :: ctxt
integer :: np,me,i, err_act
character :: trans_
character(len=20) :: name='z_slu_solver_apply'
call psb_erractionsave(err_act)
info = psb_success_
trans_ = psb_toupper(trans)
select case(trans_)
case('N')
case('T','C')
case default
call psb_errpush(psb_err_iarg_invalid_i_,name)
goto 9999
end select
!
! For non-iterative solvers, init and initu are ignored.
!
n_row = desc_data%get_local_rows()
n_col = desc_data%get_local_cols()
if (n_col <= size(work)) then
ww => work(1:n_col)
else
allocate(ww(n_col),stat=info)
if (info /= psb_success_) then
info=psb_err_alloc_request_
call psb_errpush(info,name,i_err=(/n_col,0,0,0,0/),&
& a_err='complex(psb_dpk_)')
goto 9999
end if
endif
ww(1:n_row) = x(1:n_row)
select case(trans_)
case('N')
info = amg_zslu_solve(0,n_row,1,ww,n_row,sv%lufactors)
case('T')
info = amg_zslu_solve(1,n_row,1,ww,n_row,sv%lufactors)
case('C')
info = amg_zslu_solve(2,n_row,1,ww,n_row,sv%lufactors)
case default
call psb_errpush(psb_err_internal_error_, &
& name,a_err='Invalid TRANS in ILU subsolve')
goto 9999
end select
if (info == psb_success_) &
& call psb_geaxpby(alpha,ww,beta,y,desc_data,info)
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,&
& name,a_err='Error in subsolve')
goto 9999
endif
if (n_col > size(work)) then
deallocate(ww)
endif
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine z_slu_solver_apply
subroutine z_slu_solver_apply_vect(alpha,sv,x,beta,y,desc_data,&
& trans,work,wv,info,init,initu)
use psb_base_mod
implicit none
type(psb_desc_type), intent(in) :: desc_data
class(amg_z_slu_solver_type), intent(inout) :: sv
type(psb_z_vect_type),intent(inout) :: x
type(psb_z_vect_type),intent(inout) :: y
complex(psb_dpk_),intent(in) :: alpha,beta
character(len=1),intent(in) :: trans
complex(psb_dpk_),target, intent(inout) :: work(:)
type(psb_z_vect_type),intent(inout) :: wv(:)
integer, intent(out) :: info
character, intent(in), optional :: init
type(psb_z_vect_type),intent(inout), optional :: initu
integer :: err_act
character(len=20) :: name='z_slu_solver_apply_vect'
call psb_erractionsave(err_act)
info = psb_success_
!
! For non-iterative solvers, init and initu are ignored.
!
call x%v%sync()
call y%v%sync()
call sv%apply(alpha,x%v%v,beta,y%v%v,desc_data,trans,work,info)
call y%v%set_host()
if (info /= 0) goto 9999
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine z_slu_solver_apply_vect
subroutine z_slu_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
use psb_base_mod
Implicit None
! Arguments
type(psb_zspmat_type), intent(in), target :: a
Type(psb_desc_type), Intent(inout) :: desc_a
class(amg_z_slu_solver_type), intent(inout) :: sv
integer, intent(out) :: info
type(psb_zspmat_type), intent(in), target, optional :: b
class(psb_z_base_sparse_mat), intent(in), optional :: amold
class(psb_z_base_vect_type), intent(in), optional :: vmold
class(psb_i_base_vect_type), intent(in), optional :: imold
! Local variables
type(psb_zspmat_type) :: atmp
type(psb_z_csc_sparse_mat) :: acsc
type(psb_z_coo_sparse_mat) :: acoo
integer :: n_row,n_col, nrow_a, nztota
type(psb_ctxt_type) :: ctxt
integer :: np,me,i, err_act, debug_unit, debug_level
character(len=20) :: name='z_slu_solver_bld', ch_err
info=psb_success_
call psb_erractionsave(err_act)
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
ctxt = desc_a%get_context()
call psb_info(ctxt, me, np)
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),' start'
n_row = desc_a%get_local_rows()
n_col = desc_a%get_local_cols()
call a%cscnv(atmp,info,type='coo')
call psb_rwextd(n_row,atmp,info,b=b)
call atmp%cscnv(info,type='coo',dupl=psb_dupl_add_)
nrow_a = atmp%get_nrows()
call atmp%a%csclip(acoo,info,jmax=nrow_a)
call acsc%mv_from_coo(acoo,info)
nztota = acsc%get_nzeros()
! Fix the entries to call C-base SuperLU
acsc%ia(:) = acsc%ia(:) - 1
acsc%icp(:) = acsc%icp(:) - 1
info = amg_zslu_fact(nrow_a,nztota,acsc%val,&
& acsc%icp,acsc%ia,sv%lufactors)
if (info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='amg_zslu_fact'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
call acsc%free()
call atmp%free()
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),' end'
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine z_slu_solver_bld
subroutine z_slu_solver_free(sv,info)
Implicit None
! Arguments
class(amg_z_slu_solver_type), intent(inout) :: sv
integer, intent(out) :: info
Integer :: err_act
character(len=20) :: name='z_slu_solver_free'
call psb_erractionsave(err_act)
info = psb_success_
call sv%clear_data(info)
if (info /= psb_success_) goto 9999
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine z_slu_solver_free
subroutine z_slu_solver_clear_data(sv,info)
Implicit None
! Arguments
class(amg_z_slu_solver_type), intent(inout) :: sv
integer, intent(out) :: info
Integer :: err_act
character(len=20) :: name='z_slu_solver_clear_data'
call psb_erractionsave(err_act)
info = psb_success_
if (c_associated(sv%lufactors)) info = amg_zslu_free(sv%lufactors)
sv%lufactors = c_null_ptr
if (info /= psb_success_) goto 9999
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine z_slu_solver_clear_data
subroutine z_slu_solver_finalize(sv)
Implicit None
! Arguments
type(amg_z_slu_solver_type), intent(inout) :: sv
integer :: info
Integer :: err_act
character(len=20) :: name='z_slu_solver_finalize'
call sv%free(info)
return
end subroutine z_slu_solver_finalize
subroutine z_slu_solver_descr(sv,info,iout,coarse,prefix)
Implicit None
! Arguments
class(amg_z_slu_solver_type), intent(in) :: sv
integer, intent(out) :: info
integer, intent(in), optional :: iout
logical, intent(in), optional :: coarse
character(len=*), intent(in), optional :: prefix
! Local variables
integer :: err_act
character(len=20), parameter :: name='amg_z_slu_solver_descr'
integer :: iout_
character(1024) :: prefix_
call psb_erractionsave(err_act)
info = psb_success_
if (present(iout)) then
iout_ = iout
else
iout_ = psb_out_unit
endif
if (present(prefix)) then
prefix_ = prefix
else
prefix_ = ""
end if
write(iout_,*) trim(prefix_), ' SuperLU Sparse Factorization Solver. '
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine z_slu_solver_descr
function z_slu_solver_sizeof(sv) result(val)
implicit none
! Arguments
class(amg_z_slu_solver_type), intent(in) :: sv
integer(psb_epk_) :: val
integer :: i
val = 2*psb_sizeof_ip + psb_sizeof_dp
val = val + sv%symbsize
val = val + sv%numsize
return
end function z_slu_solver_sizeof
function z_slu_solver_get_fmt() result(val)
implicit none
character(len=32) :: val
val = "SuperLU solver"
end function z_slu_solver_get_fmt
function z_slu_solver_get_id() result(val)
implicit none
integer(psb_ipk_) :: val
val = amg_slu_
end function z_slu_solver_get_id
#endif
end module amg_z_slu_solver