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Further build new matching

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TestFerdous
Salvatore Filippone 3 years ago
parent f2cf59c276
commit 9dab2a8c7c
6 changed files with 600 additions and 11 deletions
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34
amgprec/amg_d_newmatch_aggregator_mod.F90
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@ -228,6 +228,40 @@ module amg_d_newmatch_aggregator_mod
!!$ end subroutine amg_d_newmatch_unsmth_spmm_bld !!$ end subroutine amg_d_newmatch_unsmth_spmm_bld
!!$ end interface !!$ end interface
interface
subroutine amg_d_newmatch_spmm_bld_ov(a,desc_a,ilaggr,nlaggr,parms,&
& ac,desc_ac,op_prol,op_restr,t_prol,info)
import :: amg_d_newmatch_aggregator_type, psb_desc_type, psb_dspmat_type,&
& psb_ldspmat_type, psb_dpk_, psb_ipk_, psb_lpk_, amg_dml_parms, amg_daggr_data
implicit none
type(psb_dspmat_type), intent(inout) :: a
type(psb_desc_type), intent(inout) :: desc_a
integer(psb_lpk_), intent(inout) :: ilaggr(:), nlaggr(:)
type(amg_dml_parms), intent(inout) :: parms
type(psb_ldspmat_type), intent(inout) :: t_prol
type(psb_dspmat_type), intent(inout) :: op_prol,ac, op_restr
type(psb_desc_type), intent(out) :: desc_ac
integer(psb_ipk_), intent(out) :: info
end subroutine amg_d_newmatch_spmm_bld_ov
end interface
interface
subroutine amg_d_newmatch_spmm_bld_inner(a,desc_a,ilaggr,nlaggr,parms,&
& ac,desc_ac,op_prol,op_restr,t_prol,info)
import :: amg_d_newmatch_aggregator_type, psb_desc_type, psb_dspmat_type,&
& psb_ldspmat_type, psb_dpk_, psb_ipk_, psb_lpk_, amg_dml_parms, amg_daggr_data,&
& psb_d_csr_sparse_mat, psb_ld_csr_sparse_mat
implicit none
type(psb_d_csr_sparse_mat), intent(inout) :: a
type(psb_desc_type), intent(inout) :: desc_a
integer(psb_lpk_), intent(inout) :: ilaggr(:), nlaggr(:)
type(amg_dml_parms), intent(inout) :: parms
type(psb_ldspmat_type), intent(inout) :: t_prol
type(psb_dspmat_type), intent(inout) :: op_prol,ac, op_restr
type(psb_desc_type), intent(out) :: desc_ac
integer(psb_ipk_), intent(out) :: info
end subroutine amg_d_newmatch_spmm_bld_inner
end interface
private :: is_legal_malg, is_legal_csize, is_legal_nsweeps, is_legal_nlevels private :: is_legal_malg, is_legal_csize, is_legal_nsweeps, is_legal_nlevels

4
amgprec/impl/aggregator/Makefile
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@ -64,7 +64,9 @@ amg_d_newmatch_aggregator_mat_asb.o \
amg_d_newmatch_aggregator_inner_mat_asb.o \ amg_d_newmatch_aggregator_inner_mat_asb.o \
amg_d_newmatch_aggregator_mat_bld.o \ amg_d_newmatch_aggregator_mat_bld.o \
amg_d_newmatch_aggregator_tprol.o \ amg_d_newmatch_aggregator_tprol.o \
amg_d_newmatch_map_to_tprol.o amg_d_newmatch_map_to_tprol.o \
amg_d_newmatch_spmm_bld_inner.o \
amg_d_newmatch_spmm_bld_ov.o
MPCOBJS= MPCOBJS=
#MatchBoxPC.o \ #MatchBoxPC.o \

166
amgprec/impl/aggregator/amg_d_newmatch_aggregator_inner_mat_asb.F90
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@ -0,0 +1,166 @@
!
!
! 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_d_newmatch_aggregator_mat_asb.f90
!
! Subroutine: amg_d_newmatch_aggregator_mat_asb
! Version: real
!
!
! From a given AC to final format, generating DESC_AC.
! This is quite involved, because in the context of aggregation based
! on parallel matching we are building the matrix hierarchy within BLD_TPROL
! as we go, especially if we have multiple sweeps, hence this code is called
! in two completely different contexts:
! 1. Within bld_tprol for the internal hierarchy
! 2. Outside, from amg_hierarchy_bld
! The solution we have found is for bld_tprol to copy its output
! into special components ag%ac ag%desc_ac etc so that:
! 1. if they are allocated, it means that bld_tprol has been already invoked, we are in
! amg_hierarchy_bld and we only need to copy them
! 2. If they are not allocated, we are within bld_tprol, and we need to actually
! perform the various needed steps.
!
! Arguments:
! ag - type(amg_d_newmatch_aggregator_type), input/output.
! The aggregator object
! parms - type(amg_dml_parms), input
! The aggregation parameters
! a - type(psb_dspmat_type), input.
! The sparse matrix structure containing the local part of
! the fine-level matrix.
! desc_a - type(psb_desc_type), input.
! The communication descriptor of the fine-level matrix.
! The 'one-level' data structure that will contain the local
! part of the matrix to be built as well as the information
! concerning the prolongator and its transpose.
! ilaggr - integer, dimension(:), input
! The mapping between the row indices of the coarse-level
! matrix and the row indices of the fine-level matrix.
! ilaggr(i)=j means that node i in the adjacency graph
! of the fine-level matrix is mapped onto node j in the
! adjacency graph of the coarse-level matrix. Note that the indices
! are assumed to be shifted so as to make sure the ranges on
! the various processes do not overlap.
! nlaggr - integer, dimension(:) input
! nlaggr(i) contains the aggregates held by process i.
! ac - type(psb_dspmat_type), inout
! The coarse matrix
! desc_ac - type(psb_desc_type), output.
! The communication descriptor of the fine-level matrix.
! The 'one-level' data structure that will contain the local
! part of the matrix to be built as well as the information
! concerning the prolongator and its transpose.
!
! op_prol - type(psb_dspmat_type), input/output
! The tentative prolongator on input, the computed prolongator on output
!
! op_restr - type(psb_dspmat_type), input/output
! The restrictor operator; normally, it is the transpose of the prolongator.
!
! info - integer, output.
! Error code.
!
subroutine amg_d_newmatch_aggregator_inner_mat_asb(ag,parms,a,desc_a,&
& ac,desc_ac, op_prol,op_restr,info)
use psb_base_mod
use amg_base_prec_type
#if defined(SERIAL_MPI)
use amg_d_newmatch_aggregator_mod
#else
use amg_d_newmatch_aggregator_mod, amg_protect_name => amg_d_newmatch_aggregator_inner_mat_asb
#endif
implicit none
class(amg_d_newmatch_aggregator_type), target, intent(inout) :: ag
type(amg_dml_parms), intent(inout) :: parms
type(psb_dspmat_type), intent(in) :: a
type(psb_desc_type), intent(in) :: desc_a
type(psb_dspmat_type), intent(inout) :: op_prol,op_restr
type(psb_dspmat_type), intent(inout) :: ac
type(psb_desc_type), intent(inout) :: desc_ac
integer(psb_ipk_), intent(out) :: info
!
type(psb_ctxt_type) :: ictxt
integer(psb_ipk_) :: np, me
type(psb_ld_coo_sparse_mat) :: acoo, bcoo
type(psb_ld_csr_sparse_mat) :: acsr1
integer(psb_ipk_) :: nzl, inl
integer(psb_lpk_) :: ntaggr
integer(psb_ipk_) :: err_act, debug_level, debug_unit
character(len=20) :: name='d_newmatch_inner_mat_asb'
character(len=80) :: aname
logical, parameter :: debug=.false., dump_prol_restr=.false.
if (psb_get_errstatus().ne.0) return
call psb_erractionsave(err_act)
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
info = psb_success_
ictxt = desc_a%get_context()
call psb_info(ictxt,me,np)
#if !defined(SERIAL_MPI)
if (debug) write(0,*) me,' ',trim(name),' Start:',&
& allocated(ag%ac),allocated(ag%desc_ac), allocated(ag%prol),allocated(ag%restr)
select case(parms%coarse_mat)
case(amg_distr_mat_)
! Do nothing, it has already been done in spmm_bld_ov.
case(amg_repl_mat_)
!
!
info = psb_err_internal_error_
call psb_errpush(info,name,a_err='no repl coarse_mat_ here')
goto 9999
case default
info = psb_err_internal_error_
call psb_errpush(info,name,a_err='invalid amg_coarse_mat_')
goto 9999
end select
#endif
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine amg_d_newmatch_aggregator_inner_mat_asb

20
amgprec/impl/aggregator/amg_d_newmatch_aggregator_tprol.F90
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@ -247,16 +247,16 @@ subroutine amg_d_newmatch_aggregator_build_tprol(ag,parms,ag_data,&
end if end if
if (i == n_sweeps) call tmp_prol%clone(tmp_pg,info) if (i == n_sweeps) call tmp_prol%clone(tmp_pg,info)
if (do_timings) call psb_tic(idx_spmmbld) if (do_timings) call psb_tic(idx_spmmbld)
!!$ ! !
!!$ ! On entry, prolv(i) is in global numbering, ! On entry, prolv(i) is in global numbering,
!!$ ! !
!!$ call amg_d_newmatch_spmm_bld_ov(acv(i-1),desc_acv(i-1),ixaggr,nxaggr,parms,& call amg_d_newmatch_spmm_bld_ov(acv(i-1),desc_acv(i-1),ixaggr,nxaggr,parms,&
!!$ & acv(i),desc_acv(i), prolv(i),restrv(1),tmp_prol,info) & acv(i),desc_acv(i), prolv(i),restrv(1),tmp_prol,info)
!!$ if (psb_errstatus_fatal()) write(0,*)me,trim(name),'Error fatal on exit from bld_ov(i)',info if (psb_errstatus_fatal()) write(0,*)me,trim(name),'Error fatal on exit from bld_ov(i)',info
!!$ if (debug) then if (debug) then
!!$ call psb_barrier(ictxt) call psb_barrier(ictxt)
!!$ if (me==0) write(0,*) me,trim(name),' Done spmm_bld:',i if (me==0) write(0,*) me,trim(name),' Done spmm_bld:',i
!!$ end if end if
if (do_timings) call psb_toc(idx_spmmbld) if (do_timings) call psb_toc(idx_spmmbld)
! Keep a copy of prolv(i) in global numbering for the time being, will ! Keep a copy of prolv(i) in global numbering for the time being, will

218
amgprec/impl/aggregator/amg_d_newmatch_spmm_bld_inner.F90
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@ -0,0 +1,218 @@
!
!
! 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_daggrmat_nosmth_bld.F90
!
! Subroutine: amg_daggrmat_nosmth_bld
! Version: real
!
! This routine builds a coarse-level matrix A_C from a fine-level matrix A
! by using the Galerkin approach, i.e.
!
! A_C = P_C^T A P_C,
!
! where P_C is the piecewise constant interpolation operator corresponding
! the fine-to-coarse level mapping built by amg_aggrmap_bld.
!
! The coarse-level matrix A_C is distributed among the parallel processes or
! replicated on each of them, according to the value of p%parms%coarse_mat
! specified by the user through amg_dprecinit and amg_zprecset.
! On output from this routine the entries of AC, op_prol, op_restr
! are still in "global numbering" mode; this is fixed in the calling routine
!
! For details see
! P. D'Ambra, D. di Serafino and S. Filippone, On the development of
! PSBLAS-based parallel two-level Schwarz preconditioners, Appl. Num. Math.,
! 57 (2007), 1181-1196.
!
!
! Arguments:
! a - type(psb_dspmat_type), input.
! The sparse matrix structure containing the local part of
! the fine-level matrix.
! desc_a - type(psb_desc_type), input.
! The communication descriptor of the fine-level matrix.
! p - type(amg_d_onelev_type), input/output.
! The 'one-level' data structure that will contain the local
! part of the matrix to be built as well as the information
! concerning the prolongator and its transpose.
! parms - type(amg_dml_parms), input
! Parameters controlling the choice of algorithm
! ac - type(psb_dspmat_type), output
! The coarse matrix on output
!
! ilaggr - integer, dimension(:), input
! The mapping between the row indices of the coarse-level
! matrix and the row indices of the fine-level matrix.
! ilaggr(i)=j means that node i in the adjacency graph
! of the fine-level matrix is mapped onto node j in the
! adjacency graph of the coarse-level matrix. Note that the indices
! are assumed to be shifted so as to make sure the ranges on
! the various processes do not overlap.
! nlaggr - integer, dimension(:) input
! nlaggr(i) contains the aggregates held by process i.
! op_prol - type(psb_dspmat_type), input/output
! The tentative prolongator on input, the computed prolongator on output
!
! op_restr - type(psb_dspmat_type), output
! The restrictor operator; normally, it is the transpose of the prolongator.
!
! info - integer, output.
! Error code.
!
!
subroutine amg_d_newmatch_spmm_bld_inner(a_csr,desc_a,ilaggr,nlaggr,parms,&
& ac,desc_ac,op_prol,op_restr,t_prol,info)
use psb_base_mod
use amg_d_inner_mod
#if defined(SERIAL_MPI)
use amg_d_newmatch_aggregator_mod
#else
use amg_d_newmatch_aggregator_mod, amg_protect_name => amg_d_newmatch_spmm_bld_inner
#endif
implicit none
! Arguments
type(psb_d_csr_sparse_mat), intent(inout) :: a_csr
type(psb_desc_type), intent(inout) :: desc_a
integer(psb_lpk_), intent(inout) :: ilaggr(:), nlaggr(:)
type(amg_dml_parms), intent(inout) :: parms
type(psb_ldspmat_type), intent(inout) :: t_prol
type(psb_dspmat_type), intent(inout) :: ac, op_prol, op_restr
type(psb_desc_type), intent(out) :: desc_ac
integer(psb_ipk_), intent(out) :: info
! Local variables
integer(psb_ipk_) :: err_act
type(psb_ctxt_type) :: ictxt
integer(psb_ipk_) :: np, me, ndx
character(len=40) :: name
type(psb_ld_coo_sparse_mat) :: tmpcoo
type(psb_d_coo_sparse_mat) :: coo_prol, coo_restr
type(psb_d_csr_sparse_mat) :: ac_csr, csr_restr
type(psb_desc_type), target :: tmp_desc
type(psb_ldspmat_type) :: lac
integer(psb_ipk_) :: debug_level, debug_unit, naggr
integer(psb_lpk_) :: nrow, nglob, ncol, ntaggr, nrl, nzl, ip, &
& nzt, naggrm1, naggrp1, i, k
integer(psb_lpk_), allocatable :: ia(:),ja(:)
!integer(psb_lpk_) :: nrsave, ncsave, nzsave, nza, nrpsave, ncpsave, nzpsave
logical, parameter :: do_timings=.true., oldstyle=.false., debug=.false.
integer(psb_ipk_), save :: idx_spspmm=-1, idx_prolcnv=-1, idx_proltrans=-1, idx_asb=-1
name='amg_newmatch_spmm_bld_inner'
if(psb_get_errstatus().ne.0) return
info=psb_success_
call psb_erractionsave(err_act)
ictxt = desc_a%get_context()
call psb_info(ictxt, me, np)
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
nglob = desc_a%get_global_rows()
nrow = desc_a%get_local_rows()
ncol = desc_a%get_local_cols()
if ((do_timings).and.(idx_spspmm==-1)) &
& idx_spspmm = psb_get_timer_idx("SPMM_BLD: spspmm ")
if ((do_timings).and.(idx_prolcnv==-1)) &
& idx_prolcnv = psb_get_timer_idx("SPMM_BLD: prolcnv ")
if ((do_timings).and.(idx_proltrans==-1)) &
& idx_proltrans = psb_get_timer_idx("SPMM_BLD: proltrans")
if ((do_timings).and.(idx_asb==-1)) &
& idx_asb = psb_get_timer_idx("SPMM_BLD: asb ")
if (do_timings) call psb_tic(idx_prolcnv)
naggr = nlaggr(me+1)
ntaggr = sum(nlaggr)
naggrm1 = sum(nlaggr(1:me))
naggrp1 = sum(nlaggr(1:me+1))
#if !defined(SERIAL_MPI)
!
! Here T_PROL should be arriving with GLOBAL indices on the cols
! and LOCAL indices on the rows.
!
if (debug) write(0,*) me,' ',trim(name),' Size check on entry New: ',&
& op_prol%get_fmt(),op_prol%get_nrows(),op_prol%get_ncols(),op_prol%get_nzeros(),&
& nrow,ntaggr,naggr
call t_prol%cp_to(tmpcoo)
call psb_cdall(ictxt,desc_ac,info,nl=naggr)
nzl = tmpcoo%get_nzeros()
if (debug) write(0,*) me,' ',trim(name),' coo_prol: ',&
& tmpcoo%ia(1:min(10,nzl)),' :',tmpcoo%ja(1:min(10,nzl))
call desc_ac%indxmap%g2lip_ins(tmpcoo%ja(1:nzl),info)
call tmpcoo%set_ncols(desc_ac%get_local_cols())
call tmpcoo%cp_to_icoo(coo_prol,info)
call amg_ptap_bld(a_csr,desc_a,nlaggr,parms,ac,&
& coo_prol,desc_ac,coo_restr,info)
nzl = coo_prol%get_nzeros()
if (debug) write(0,*) me,' ',trim(name),' coo_prol: ',&
& coo_prol%ia(1:min(10,nzl)),' :',coo_prol%ja(1:min(10,nzl))
call op_prol%mv_from(coo_prol)
call op_restr%mv_from(coo_restr)
if (debug) then
write(0,*) me,' ',trim(name),' Checkpoint at exit'
call psb_barrier(ictxt)
write(0,*) me,' ',trim(name),' Checkpoint through'
end if
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,a_err='Build ac = op_restr x a3')
goto 9999
end if
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& 'Done smooth_aggregate '
#endif
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine amg_d_newmatch_spmm_bld_inner

169
amgprec/impl/aggregator/amg_d_newmatch_spmm_bld_ov.F90
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@ -0,0 +1,169 @@
!
!
! 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_daggrmat_nosmth_bld_ov.F90
!
! Subroutine: amg_daggrmat_nosmth_bld_ov
! Version: real
!
! This routine builds a coarse-level matrix A_C from a fine-level matrix A
! by using the Galerkin approach, i.e.
!
! A_C = P_C^T A P_C,
!
! where P_C is the piecewise constant interpolation operator corresponding
! the fine-to-coarse level mapping built by amg_aggrmap_bld_ov.
!
! The coarse-level matrix A_C is distributed among the parallel processes or
! replicated on each of them, according to the value of p%parms%coarse_mat
! specified by the user through amg_dprecinit and amg_zprecset.
! On output from this routine the entries of AC, op_prol, op_restr
! are still in "global numbering" mode; this is fixed in the calling routine
!
! For details see
! P. D'Ambra, D. di Serafino and S. Filippone, On the development of
! PSBLAS-based parallel two-level Schwarz preconditioners, Appl. Num. Math.,
! 57 (2007), 1181-1196.
!
!
! Arguments:
! a - type(psb_dspmat_type), input.
! The sparse matrix structure containing the local part of
! the fine-level matrix.
! desc_a - type(psb_desc_type), input.
! The communication descriptor of the fine-level matrix.
! p - type(amg_d_onelev_type), input/output.
! The 'one-level' data structure that will contain the local
! part of the matrix to be built as well as the information
! concerning the prolongator and its transpose.
! parms - type(amg_dml_parms), input
! Parameters controlling the choice of algorithm
! ac - type(psb_dspmat_type), output
! The coarse matrix on output
!
! ilaggr - integer, dimension(:), input
! The mapping between the row indices of the coarse-level
! matrix and the row indices of the fine-level matrix.
! ilaggr(i)=j means that node i in the adjacency graph
! of the fine-level matrix is mapped onto node j in the
! adjacency graph of the coarse-level matrix. Note that the indices
! are assumed to be shifted so as to make sure the ranges on
! the various processes do not overlap.
! nlaggr - integer, dimension(:) input
! nlaggr(i) contains the aggregates held by process i.
! op_prol - type(psb_dspmat_type), input/output
! The tentative prolongator on input, the computed prolongator on output
!
! op_restr - type(psb_dspmat_type), output
! The restrictor operator; normally, it is the transpose of the prolongator.
!
! info - integer, output.
! Error code.
!
!
subroutine amg_d_newmatch_spmm_bld_ov(a,desc_a,ilaggr,nlaggr,parms,&
& ac,desc_ac,op_prol,op_restr,t_prol,info)
use psb_base_mod
use amg_d_inner_mod
#if defined(SERIAL_MPI)
use amg_d_newmatch_aggregator_mod
#else
use amg_d_newmatch_aggregator_mod, amg_protect_name => amg_d_newmatch_spmm_bld_ov
#endif
implicit none
! Arguments
type(psb_dspmat_type), intent(inout) :: a
type(psb_desc_type), intent(inout) :: desc_a
integer(psb_lpk_), intent(inout) :: ilaggr(:), nlaggr(:)
type(amg_dml_parms), intent(inout) :: parms
type(psb_ldspmat_type), intent(inout) :: t_prol
type(psb_dspmat_type), intent(inout) :: ac, op_prol, op_restr
type(psb_desc_type), intent(out) :: desc_ac
integer(psb_ipk_), intent(out) :: info
! Local variables
integer(psb_ipk_) :: err_act
type(psb_ctxt_type) :: ictxt
integer(psb_ipk_) :: np, me
character(len=20) :: name
type(psb_d_csr_sparse_mat) :: acsr
type(psb_ld_coo_sparse_mat) :: coo_prol, coo_restr
integer(psb_lpk_) :: nrow, nglob, ncol, ntaggr, nzl, ip, &
& naggr, nzt, naggrm1, naggrp1, i, k
integer(psb_ipk_) :: inaggr, nzlp
integer(psb_ipk_) :: debug_level, debug_unit
logical, parameter :: debug=.false., new_version=.true.
name='amg_newmatch_spmm_bld_ov'
if(psb_get_errstatus().ne.0) return
info=psb_success_
call psb_erractionsave(err_act)
ictxt = desc_a%get_context()
call psb_info(ictxt, me, np)
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
#if !defined(SERIAL_MPI)
call a%mv_to(acsr)
call amg_d_newmatch_spmm_bld_inner(acsr,desc_a,ilaggr,nlaggr,parms,&
& ac,desc_ac,op_prol,op_restr,t_prol,info)
if (psb_errstatus_fatal()) write(0,*)me,trim(name),'Error fatal on exit from bld_inner',info
if (info /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err="SPMM_BLD_INNER")
goto 9999
end if
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& 'Done spmm_bld '
#endif
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine amg_d_newmatch_spmm_bld_ov
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