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276 lines
11 KiB
Fortran
276 lines
11 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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! 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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! moved here from amg4psblas-extension
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!
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!
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! AMG4PSBLAS Extensions
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!
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! (C) Copyright 2019
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!
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! Salvatore Filippone Cranfield University
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! Pasqua D'Ambra IAC-CNR, Naples, IT
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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_d_krm_solver_impl.f90
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!
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! This is the implementation file corresponding to amg_d_krm_solver_mod.
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!
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!
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subroutine amg_d_krm_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
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use psb_base_mod
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use amg_d_krm_solver, amg_protect_name => amg_d_krm_solver_bld
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Implicit None
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! Arguments
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type(psb_dspmat_type), intent(in), target :: a
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Type(psb_desc_type), Intent(inout) :: desc_a
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class(amg_d_krm_solver_type), intent(inout) :: sv
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integer(psb_ipk_), intent(out) :: info
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type(psb_dspmat_type), intent(in), target, optional :: b
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class(psb_d_base_sparse_mat), intent(in), optional :: amold
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class(psb_d_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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! Local variables
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integer(psb_ipk_) :: n_row,n_col, nrow_a, nztota
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integer(psb_lpk_) :: lnr
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integer(psb_ipk_) :: np,me,i, err_act, debug_unit, debug_level
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type(psb_ctxt_type) :: ctxt, l_ctxt
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character(len=20) :: name='@Z@_krm_solver_bld', ch_err
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info=psb_success_
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call psb_erractionsave(err_act)
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debug_unit = psb_get_debug_unit()
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debug_level = psb_get_debug_level()
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ctxt = desc_a%get_context()
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call psb_info(ctxt, me, np)
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),' start'
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call sv%prec%free(info)
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if (sv%global) then
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call sv%prec%init(ctxt,sv%kprec,info)
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if (sv%i_sub_solve>0) then
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call sv%prec%set('sub_solve',sv%i_sub_solve,info)
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else
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call sv%prec%set('sub_solve',sv%sub_solve,info)
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end if
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call sv%prec%set('sub_fillin',sv%fillin,info)
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call sv%prec%hierarchy_build(a,desc_a,info)
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call sv%prec%smoothers_build(a,desc_a,info,amold=amold,vmold=vmold)
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sv%a => a
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else
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call psb_init(l_ctxt,np=1_psb_ipk_,basectxt=ctxt,ids=(/me/))
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n_row = desc_a%get_local_rows()
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lnr = n_row
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call psb_cdall(l_ctxt,sv%desc_local,info,mg=lnr,repl=.true.)
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call psb_cdasb(sv%desc_local,info)
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call sv%prec%init(l_ctxt,sv%kprec,info)
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!This is a gigantic kludge, to be revised
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if (sv%i_sub_solve>0) then
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call sv%prec%set('sub_solve',sv%i_sub_solve,info)
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else
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call sv%prec%set('sub_solve',sv%sub_solve,info)
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end if
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call sv%prec%set('sub_fillin',sv%fillin,info)
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call a%csclip(sv%a_local,info,jmax=n_row)
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call sv%prec%hierarchy_build(sv%a_local,sv%desc_local,info)
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call sv%prec%smoothers_build(sv%a_local,sv%desc_local,info,amold=amold,vmold=vmold)
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call psb_geall(sv%x_local,sv%desc_local,info)
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call sv%x_local%zero()
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call psb_geasb(sv%x_local,sv%desc_local,info,mold=vmold)
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call psb_geall(sv%z_local,sv%desc_local,info)
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call sv%z_local%zero()
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call psb_geasb(sv%z_local,sv%desc_local,info,mold=vmold)
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end if
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if(info /= psb_success_) then
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info=psb_err_from_subroutine_
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ch_err='inner precbld'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),' end'
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(err_act)
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return
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end subroutine amg_d_krm_solver_bld
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subroutine amg_d_krm_solver_apply_vect(alpha,sv,x,beta,y,desc_data,&
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& trans,work,wv,info,init,initu)
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use psb_base_mod
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use psb_krylov_mod
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use amg_d_krm_solver, amg_protect_name => amg_d_krm_solver_apply_vect
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Implicit None
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type(psb_desc_type), intent(in) :: desc_data
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class(amg_d_krm_solver_type), intent(inout) :: sv
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type(psb_d_vect_type),intent(inout) :: x
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type(psb_d_vect_type),intent(inout) :: y
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real(psb_dpk_),intent(in) :: alpha,beta
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character(len=1),intent(in) :: trans
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real(psb_dpk_),target, intent(inout) :: work(:)
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type(psb_d_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_d_vect_type),intent(inout), optional :: initu
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type(psb_d_vect_type) :: z
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integer(psb_ipk_) :: np,me,i, err_act, debug_unit, debug_level
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type(psb_ctxt_type) :: ctxt
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character(len=20) :: name='@Z@_krm_solver_apply_v', ch_err
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info=psb_success_
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call psb_erractionsave(err_act)
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debug_unit = psb_get_debug_unit()
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debug_level = psb_get_debug_level()
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ctxt = desc_data%get_context()
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call psb_info(ctxt, me, np)
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),' start'
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if (sv%global) then
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call psb_geall(z,desc_data,info)
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call z%zero()
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call psb_geasb(z,desc_data,info,mold=x%v)
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),' norms ',&
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& psb_genrm2(x,desc_data,info),psb_genrm2(y,desc_data,info),&
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& psb_genrm2(z,desc_data,info)
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call psb_krylov(sv%method,sv%a,sv%prec,x,z,sv%eps,&
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& desc_data,info,itmax=sv%itmax,itrace=sv%itrace,&
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& istop=sv%istopc,irst=sv%irst)
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!!$ call sv%prec%apply(x,z,desc_data,info,trans=trans,work=work)
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call psb_geaxpby(alpha,z,beta,y,desc_data,info)
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else
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call psb_geaxpby(done,x,dzero,sv%x_local,sv%desc_local,info)
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call psb_krylov(sv%method,sv%a_local,sv%prec,sv%x_local,sv%z_local,sv%eps,&
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& sv%desc_local,info,itmax=sv%itmax,itrace=sv%itrace,&
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& istop=sv%istopc,irst=sv%irst)
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call psb_geaxpby(alpha,sv%z_local,beta,y,sv%desc_local,info)
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end if
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(err_act)
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return
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end subroutine amg_d_krm_solver_apply_vect
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subroutine amg_d_krm_solver_apply(alpha,sv,x,beta,y,desc_data,&
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& trans,work,info,init,initu)
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use psb_base_mod
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use amg_d_krm_solver, amg_protect_name => amg_d_krm_solver_apply
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implicit none
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type(psb_desc_type), intent(in) :: desc_data
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class(amg_d_krm_solver_type), intent(inout) :: sv
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real(psb_dpk_),intent(inout) :: x(:)
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real(psb_dpk_),intent(inout) :: y(:)
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real(psb_dpk_),intent(in) :: alpha,beta
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character(len=1),intent(in) :: trans
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real(psb_dpk_),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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real(psb_dpk_),intent(inout), optional :: initu(:)
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real(psb_dpk_), allocatable :: z(:)
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integer(psb_ipk_) :: np,me,i, err_act, debug_unit, debug_level
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type(psb_ctxt_type) :: ctxt
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character(len=20) :: name='@Z@_krm_solver_apply', ch_err
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info=psb_success_
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call psb_erractionsave(err_act)
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debug_unit = psb_get_debug_unit()
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debug_level = psb_get_debug_level()
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ctxt = desc_data%get_context()
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call psb_info(ctxt, me, np)
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),' start'
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call psb_geasb(z,desc_data,info,scratch=.true.)
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call sv%prec%apply(x,z,desc_data,info,trans=trans,work=work)
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call psb_geaxpby(alpha,z,beta,y,desc_data,info)
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(err_act)
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return
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end subroutine amg_d_krm_solver_apply
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