!!$
!!$
!!$ MLD2P4 version 2.0
!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
!!$ based on PSBLAS (Parallel Sparse BLAS version 3.3)
!!$
!!$ (C) Copyright 2008, 2010, 2012, 2015
!!$
!!$ 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
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!!$
!
! File: mld_s_umf_solver_mod.f90
!
! Module: mld_s_umf_solver_mod
!
! This module defines:
! - the mld_s_umf_solver_type data structure containing the ingredients
! to interface with the UMFPACK package.
! 1. The factorization is restricted to the diagonal block of the
! current image.
!
module mld_s_umf_solver
use iso_c_binding
use mld_s_base_solver_mod
#if defined(LONG_INTEGERS)
type, extends(mld_s_base_solver_type) :: mld_s_umf_solver_type
end type mld_s_umf_solver_type
#else
type, extends(mld_s_base_solver_type) :: mld_s_umf_solver_type
type(c_ptr) :: symbolic=c_null_ptr, numeric=c_null_ptr
integer(c_long_long) :: symbsize=0, numsize=0
contains
procedure, pass(sv) :: build => s_umf_solver_bld
procedure, pass(sv) :: apply_a => s_umf_solver_apply
procedure, pass(sv) :: apply_v => s_umf_solver_apply_vect
procedure, pass(sv) :: free => s_umf_solver_free
procedure, pass(sv) :: descr => s_umf_solver_descr
procedure, pass(sv) :: sizeof => s_umf_solver_sizeof
#if defined(HAVE_FINAL)
final :: s_umf_solver_finalize
#endif
end type mld_s_umf_solver_type
private :: s_umf_solver_bld, s_umf_solver_apply, &
& s_umf_solver_free, s_umf_solver_descr, &
& s_umf_solver_sizeof, s_umf_solver_apply_vect
#if defined(HAVE_FINAL)
private :: s_umf_solver_finalize
#endif
interface
function mld_sumf_fact(n,nnz,values,rowind,colptr,&
& symptr,numptr,ssize,nsize)&
& bind(c,name='mld_sumf_fact') result(info)
use iso_c_binding
integer(c_int), value :: n,nnz
integer(c_int) :: info
integer(c_long_long) :: ssize, nsize
integer(c_int) :: rowind(*),colptr(*)
real(c_float) :: values(*)
type(c_ptr) :: symptr, numptr
end function mld_sumf_fact
end interface
interface
function mld_sumf_solve(itrans,n,x, b, ldb, numptr)&
& bind(c,name='mld_sumf_solve') result(info)
use iso_c_binding
integer(c_int) :: info
integer(c_int), value :: itrans,n,ldb
real(c_float) :: x(*), b(ldb,*)
type(c_ptr), value :: numptr
end function mld_sumf_solve
end interface
interface
function mld_sumf_free(symptr, numptr)&
& bind(c,name='mld_sumf_free') result(info)
use iso_c_binding
integer(c_int) :: info
type(c_ptr), value :: symptr, numptr
end function mld_sumf_free
end interface
contains
subroutine s_umf_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(mld_s_umf_solver_type), intent(inout) :: sv
real(psb_spk_),intent(inout) :: x(:)
real(psb_spk_),intent(inout) :: y(:)
real(psb_spk_),intent(in) :: alpha,beta
character(len=1),intent(in) :: trans
real(psb_spk_),target, intent(inout) :: work(:)
integer, intent(out) :: info
character, intent(in), optional :: init
real(psb_spk_),intent(inout), optional :: initu(:)
integer :: n_row,n_col
real(psb_spk_), pointer :: ww(:)
integer :: ictxt,np,me,i, err_act
character :: trans_
character(len=20) :: name='s_umf_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='real(psb_spk_)')
goto 9999
end if
endif
select case(trans_)
case('N')
info = mld_sumf_solve(0,n_row,ww,x,n_row,sv%numeric)
case('T')
!
! Note: with UMF, 1 meand Ctranspose, 2 means transpose
! even for complex data.
!
if (psb_s_is_complex_) then
info = mld_sumf_solve(2,n_row,ww,x,n_row,sv%numeric)
else
info = mld_sumf_solve(1,n_row,ww,x,n_row,sv%numeric)
end if
case('C')
info = mld_sumf_solve(1,n_row,ww,x,n_row,sv%numeric)
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 s_umf_solver_apply
subroutine s_umf_solver_apply_vect(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(mld_s_umf_solver_type), intent(inout) :: sv
type(psb_s_vect_type),intent(inout) :: x
type(psb_s_vect_type),intent(inout) :: y
real(psb_spk_),intent(in) :: alpha,beta
character(len=1),intent(in) :: trans
real(psb_spk_),target, intent(inout) :: work(:)
integer, intent(out) :: info
character, intent(in), optional :: init
type(psb_s_vect_type),intent(inout), optional :: initu
integer :: err_act
character(len=20) :: name='s_umf_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 s_umf_solver_apply_vect
subroutine s_umf_solver_bld(a,desc_a,sv,upd,info,b,amold,vmold,imold)
use psb_base_mod
Implicit None
! Arguments
type(psb_sspmat_type), intent(in), target :: a
Type(psb_desc_type), Intent(in) :: desc_a
class(mld_s_umf_solver_type), intent(inout) :: sv
character, intent(in) :: upd
integer, intent(out) :: info
type(psb_sspmat_type), intent(in), target, optional :: b
class(psb_s_base_sparse_mat), intent(in), optional :: amold
class(psb_s_base_vect_type), intent(in), optional :: vmold
class(psb_i_base_vect_type), intent(in), optional :: imold
! Local variables
type(psb_sspmat_type) :: atmp
type(psb_s_csc_sparse_mat) :: acsc
integer :: n_row,n_col, nrow_a, nztota
integer :: ictxt,np,me,i, err_act, debug_unit, debug_level
character(len=20) :: name='s_umf_solver_bld', ch_err
info=psb_success_
call psb_erractionsave(err_act)
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
ictxt = desc_a%get_context()
call psb_info(ictxt, 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()
if (psb_toupper(upd) == 'F') then
call a%cscnv(atmp,info,type='coo')
call psb_rwextd(n_row,atmp,info,b=b)
call atmp%cscnv(info,type='csc',dupl=psb_dupl_add_)
call atmp%mv_to(acsc)
nrow_a = acsc%get_nrows()
nztota = acsc%get_nzeros()
! Fix the entres to call C-base UMFPACK.
acsc%ia(:) = acsc%ia(:) - 1
acsc%icp(:) = acsc%icp(:) - 1
info = mld_sumf_fact(nrow_a,nztota,acsc%val,&
& acsc%ia,acsc%icp,sv%symbolic,sv%numeric,&
& sv%symbsize,sv%numsize)
if (info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='mld_sumf_fact'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
call acsc%free()
call atmp%free()
else
! ?
info=psb_err_internal_error_
call psb_errpush(info,name)
goto 9999
end if
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 s_umf_solver_bld
subroutine s_umf_solver_free(sv,info)
Implicit None
! Arguments
class(mld_s_umf_solver_type), intent(inout) :: sv
integer, intent(out) :: info
Integer :: err_act
character(len=20) :: name='s_umf_solver_free'
call psb_erractionsave(err_act)
info = mld_sumf_free(sv%symbolic,sv%numeric)
if (info /= psb_success_) goto 9999
sv%symbolic = c_null_ptr
sv%numeric = c_null_ptr
sv%symbsize = 0
sv%numsize = 0
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine s_umf_solver_free
#if defined(HAVE_FINAL)
subroutine s_umf_solver_finalize(sv)
Implicit None
! Arguments
type(mld_s_umf_solver_type), intent(inout) :: sv
integer :: info
Integer :: err_act
character(len=20) :: name='s_umf_solver_finalize'
call sv%free(info)
return
end subroutine s_umf_solver_finalize
#endif
subroutine s_umf_solver_descr(sv,info,iout,coarse)
Implicit None
! Arguments
class(mld_s_umf_solver_type), intent(in) :: sv
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_s_umf_solver_descr'
integer :: iout_
call psb_erractionsave(err_act)
info = psb_success_
if (present(iout)) then
iout_ = iout
else
iout_ = 6
endif
write(iout_,*) ' UMFPACK Sparse Factorization Solver. '
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine s_umf_solver_descr
function s_umf_solver_sizeof(sv) result(val)
implicit none
! Arguments
class(mld_s_umf_solver_type), intent(in) :: sv
integer(psb_long_int_k_) :: val
integer :: i
val = 2*psb_sizeof_long_int
val = val + sv%symbsize
val = val + sv%numsize
return
end function s_umf_solver_sizeof
#endif
end module mld_s_umf_solver