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.
602 lines
23 KiB
Fortran
602 lines
23 KiB
Fortran
!
|
|
!
|
|
! MLD2P4 version 2.1
|
|
! MultiLevel Domain Decomposition Parallel Preconditioners Package
|
|
! based on PSBLAS (Parallel Sparse BLAS version 3.5)
|
|
!
|
|
! (C) Copyright 2008, 2010, 2012, 2015, 2017
|
|
!
|
|
! Salvatore Filippone Cranfield University, UK
|
|
! Pasqua D'Ambra IAC-CNR, Naples, IT
|
|
! Daniela di Serafino University of Campania "L. Vanvitelli", Caserta, IT
|
|
!
|
|
! 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_s_pde2d.f90
|
|
!
|
|
! Program: mld_s_pde2d
|
|
! This sample program solves a linear system obtained by discretizing a
|
|
! PDE with Dirichlet BCs.
|
|
!
|
|
!
|
|
! The PDE is a general second order equation in 2d
|
|
!
|
|
! a1 dd(u) a2 dd(u) b1 d(u) b2 d(u)
|
|
! - ------ - ------ ----- + ------ + c u = f
|
|
! dxdx dydy dx dy
|
|
!
|
|
! with Dirichlet boundary conditions
|
|
! u = g
|
|
!
|
|
! on the unit square 0<=x,y<=1.
|
|
!
|
|
!
|
|
! Note that if b1=b2=c=0., the PDE is the Laplace equation.
|
|
!
|
|
! In this sample program the index space of the discretized
|
|
! computational domain is first numbered sequentially in a standard way,
|
|
! then the corresponding vector is distributed according to a BLOCK
|
|
! data distribution.
|
|
!
|
|
module mld_s_pde2d_mod
|
|
contains
|
|
|
|
!
|
|
! functions parametrizing the differential equation
|
|
!
|
|
function b1(x,y)
|
|
use psb_base_mod, only : psb_spk_,sone,szero
|
|
real(psb_spk_) :: b1
|
|
real(psb_spk_), intent(in) :: x,y
|
|
b1=szero
|
|
end function b1
|
|
function b2(x,y)
|
|
use psb_base_mod, only : psb_spk_,sone,szero
|
|
real(psb_spk_) :: b2
|
|
real(psb_spk_), intent(in) :: x,y
|
|
b2=szero
|
|
end function b2
|
|
function c(x,y)
|
|
use psb_base_mod, only : psb_spk_,sone,szero
|
|
real(psb_spk_) :: c
|
|
real(psb_spk_), intent(in) :: x,y
|
|
c=szero
|
|
end function c
|
|
function a1(x,y)
|
|
use psb_base_mod, only : psb_spk_,sone,szero
|
|
real(psb_spk_) :: a1
|
|
real(psb_spk_), intent(in) :: x,y
|
|
a1=sone
|
|
end function a1
|
|
function a2(x,y)
|
|
use psb_base_mod, only : psb_spk_,sone,szero
|
|
real(psb_spk_) :: a2
|
|
real(psb_spk_), intent(in) :: x,y
|
|
a2=sone
|
|
end function a2
|
|
function g(x,y)
|
|
use psb_base_mod, only : psb_spk_, sone, szero
|
|
real(psb_spk_) :: g
|
|
real(psb_spk_), intent(in) :: x,y
|
|
g = szero
|
|
if (x == sone) then
|
|
g = sone
|
|
else if (x == szero) then
|
|
g = exp(-y**2)
|
|
end if
|
|
end function g
|
|
end module mld_s_pde2d_mod
|
|
|
|
program mld_s_pde2d
|
|
use psb_base_mod
|
|
use mld_prec_mod
|
|
use psb_krylov_mod
|
|
use psb_util_mod
|
|
use data_input
|
|
use mld_s_pde2d_mod
|
|
implicit none
|
|
|
|
! input parameters
|
|
character(len=20) :: kmethd, ptype
|
|
character(len=5) :: afmt
|
|
integer(psb_ipk_) :: idim
|
|
|
|
! miscellaneous
|
|
real(psb_dpk_) :: t1, t2, tprec, thier, tslv
|
|
|
|
! sparse matrix and preconditioner
|
|
type(psb_sspmat_type) :: a
|
|
type(mld_sprec_type) :: prec
|
|
! descriptor
|
|
type(psb_desc_type) :: desc_a
|
|
! dense vectors
|
|
type(psb_s_vect_type) :: x,b,r
|
|
! parallel environment
|
|
integer(psb_ipk_) :: ictxt, iam, np
|
|
|
|
! solver parameters
|
|
integer(psb_ipk_) :: iter, itmax,itrace, istopc, irst, nlv
|
|
integer(psb_long_int_k_) :: amatsize, precsize, descsize
|
|
real(psb_spk_) :: err, resmx, resmxp
|
|
|
|
! Krylov solver data
|
|
type solverdata
|
|
character(len=40) :: kmethd ! Krylov solver
|
|
integer(psb_ipk_) :: istopc ! stopping criterion
|
|
integer(psb_ipk_) :: itmax ! maximum number of iterations
|
|
integer(psb_ipk_) :: itrace ! tracing
|
|
integer(psb_ipk_) :: irst ! restart
|
|
real(psb_spk_) :: eps ! stopping tolerance
|
|
end type solverdata
|
|
type(solverdata) :: s_choice
|
|
|
|
! preconditioner data
|
|
type precdata
|
|
|
|
! preconditioner type
|
|
character(len=40) :: descr ! verbose description of the prec
|
|
character(len=10) :: ptype ! preconditioner type
|
|
|
|
! general AMG data
|
|
character(len=16) :: mlcycle ! AMG cycle type
|
|
integer(psb_ipk_) :: otr_sweeps ! number of AMG cycles
|
|
integer(psb_ipk_) :: maxlevs ! maximum number of levels in AMG preconditioner
|
|
|
|
! AMG aggregation
|
|
character(len=16) :: aggr_prol ! aggregation type: SMOOTHED, NONSMOOTHED
|
|
character(len=16) :: par_aggr_alg ! parallel aggregation algorithm: DEC, SYMDEC
|
|
character(len=16) :: aggr_ord ! ordering for aggregation: NATURAL, DEGREE
|
|
character(len=16) :: aggr_filter ! filtering: FILTER, NO_FILTER
|
|
real(psb_spk_) :: mncrratio ! minimum aggregation ratio
|
|
real(psb_spk_), allocatable :: athresv(:) ! smoothed aggregation threshold vector
|
|
integer(psb_ipk_) :: thrvsz ! size of threshold vector
|
|
real(psb_spk_) :: athres ! smoothed aggregation threshold
|
|
integer(psb_ipk_) :: csize ! minimum size of coarsest matrix
|
|
|
|
! AMG smoother or pre-smoother; also 1-lev preconditioner
|
|
character(len=16) :: smther ! (pre-)smoother type: BJAC, AS
|
|
integer(psb_ipk_) :: jsweeps ! (pre-)smoother / 1-lev prec. sweeps
|
|
integer(psb_ipk_) :: novr ! number of overlap layers
|
|
character(len=16) :: restr ! restriction over application of AS
|
|
character(len=16) :: prol ! prolongation over application of AS
|
|
character(len=16) :: solve ! local subsolver type: ILU, MILU, ILUT,
|
|
! UMF, MUMPS, SLU, FWGS, BWGS, JAC
|
|
integer(psb_ipk_) :: fill ! fill-in for incomplete LU factorization
|
|
real(psb_spk_) :: thr ! threshold for ILUT factorization
|
|
|
|
! AMG post-smoother; ignored by 1-lev preconditioner
|
|
character(len=16) :: smther2 ! post-smoother type: BJAC, AS
|
|
integer(psb_ipk_) :: jsweeps2 ! post-smoother sweeps
|
|
integer(psb_ipk_) :: novr2 ! number of overlap layers
|
|
character(len=16) :: restr2 ! restriction over application of AS
|
|
character(len=16) :: prol2 ! prolongation over application of AS
|
|
character(len=16) :: solve2 ! local subsolver type: ILU, MILU, ILUT,
|
|
! UMF, MUMPS, SLU, FWGS, BWGS, JAC
|
|
integer(psb_ipk_) :: fill2 ! fill-in for incomplete LU factorization
|
|
real(psb_spk_) :: thr2 ! threshold for ILUT factorization
|
|
|
|
! coarsest-level solver
|
|
character(len=16) :: cmat ! coarsest matrix layout: REPL, DIST
|
|
character(len=16) :: csolve ! coarsest-lev solver: BJAC, SLUDIST (distr.
|
|
! mat.); UMF, MUMPS, SLU, ILU, ILUT, MILU
|
|
! (repl. mat.)
|
|
character(len=16) :: csbsolve ! coarsest-lev local subsolver: ILU, ILUT,
|
|
! MILU, UMF, MUMPS, SLU
|
|
integer(psb_ipk_) :: cfill ! fill-in for incomplete LU factorization
|
|
real(psb_spk_) :: cthres ! threshold for ILUT factorization
|
|
integer(psb_ipk_) :: cjswp ! sweeps for GS or JAC coarsest-lev subsolver
|
|
|
|
end type precdata
|
|
type(precdata) :: p_choice
|
|
|
|
! other variables
|
|
integer(psb_ipk_) :: info, i, k
|
|
character(len=20) :: name,ch_err
|
|
|
|
info=psb_success_
|
|
|
|
|
|
call psb_init(ictxt)
|
|
call psb_info(ictxt,iam,np)
|
|
|
|
if (iam < 0) then
|
|
! This should not happen, but just in case
|
|
call psb_exit(ictxt)
|
|
stop
|
|
endif
|
|
if(psb_get_errstatus() /= 0) goto 9999
|
|
name='mld_s_pde2d'
|
|
call psb_set_errverbosity(itwo)
|
|
!
|
|
! Hello world
|
|
!
|
|
if (iam == psb_root_) then
|
|
write(*,*) 'Welcome to MLD2P4 version: ',mld_version_string_
|
|
write(*,*) 'This is the ',trim(name),' sample program'
|
|
end if
|
|
|
|
!
|
|
! get parameters
|
|
!
|
|
call get_parms(ictxt,afmt,idim,s_choice,p_choice)
|
|
|
|
!
|
|
! allocate and fill in the coefficient matrix, rhs and initial guess
|
|
!
|
|
call psb_barrier(ictxt)
|
|
t1 = psb_wtime()
|
|
call psb_gen_pde2d(ictxt,idim,a,b,x,desc_a,afmt,&
|
|
& a1,a2,b1,b2,c,g,info)
|
|
call psb_barrier(ictxt)
|
|
t2 = psb_wtime() - t1
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='psb_gen_pde2d'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
if (iam == psb_root_) &
|
|
& write(psb_out_unit,'("Overall matrix creation time : ",es12.5)')t2
|
|
if (iam == psb_root_) &
|
|
& write(psb_out_unit,'(" ")')
|
|
!
|
|
! initialize the preconditioner
|
|
!
|
|
call prec%init(p_choice%ptype,info)
|
|
select case(trim(psb_toupper(p_choice%ptype)))
|
|
case ('NONE','NOPREC','JACOBI')
|
|
! Do nothing, keep defaults
|
|
|
|
case ('BJAC')
|
|
call prec%set('smoother_sweeps', p_choice%jsweeps, info)
|
|
call prec%set('sub_solve', p_choice%solve, info)
|
|
call prec%set('sub_fillin', p_choice%fill, info)
|
|
call prec%set('sub_iluthrs', p_choice%thr, info)
|
|
|
|
case('AS')
|
|
call prec%set('smoother_sweeps', p_choice%jsweeps, info)
|
|
call prec%set('sub_ovr', p_choice%novr, info)
|
|
call prec%set('sub_restr', p_choice%restr, info)
|
|
call prec%set('sub_prol', p_choice%prol, info)
|
|
call prec%set('sub_solve', p_choice%solve, info)
|
|
call prec%set('sub_fillin', p_choice%fill, info)
|
|
call prec%set('sub_iluthrs', p_choice%thr, info)
|
|
|
|
case ('ML')
|
|
! multilevel preconditioner
|
|
|
|
call prec%set('ml_cycle', p_choice%mlcycle, info)
|
|
call prec%set('outer_sweeps', p_choice%otr_sweeps,info)
|
|
if (p_choice%csize>0)&
|
|
& call prec%set('min_coarse_size', p_choice%csize, info)
|
|
if (p_choice%mncrratio>1)&
|
|
& call prec%set('min_cr_ratio', p_choice%mncrratio, info)
|
|
if (p_choice%maxlevs>0)&
|
|
& call prec%set('max_levs', p_choice%maxlevs, info)
|
|
if (p_choice%athres >= dzero) &
|
|
& call prec%set('aggr_thresh', p_choice%athres, info)
|
|
if (p_choice%thrvsz>0) then
|
|
do k=1,min(p_choice%thrvsz,size(prec%precv)-1)
|
|
call prec%set('aggr_thresh', p_choice%athresv(k), info,ilev=(k+1))
|
|
end do
|
|
end if
|
|
|
|
call prec%set('aggr_prol', p_choice%aggr_prol, info)
|
|
call prec%set('par_aggr_alg', p_choice%par_aggr_alg, info)
|
|
call prec%set('aggr_ord', p_choice%aggr_ord, info)
|
|
call prec%set('aggr_filter', p_choice%aggr_filter,info)
|
|
|
|
|
|
call prec%set('smoother_type', p_choice%smther, info)
|
|
call prec%set('smoother_sweeps', p_choice%jsweeps, info)
|
|
call prec%set('sub_ovr', p_choice%novr, info)
|
|
call prec%set('sub_restr', p_choice%restr, info)
|
|
call prec%set('sub_prol', p_choice%prol, info)
|
|
call prec%set('sub_solve', p_choice%solve, info)
|
|
call prec%set('sub_fillin', p_choice%fill, info)
|
|
call prec%set('sub_iluthrs', p_choice%thr, info)
|
|
|
|
if (psb_toupper(p_choice%smther2) /= 'NONE') then
|
|
call prec%set('smoother_type', p_choice%smther2, info,pos='post')
|
|
call prec%set('smoother_sweeps', p_choice%jsweeps2, info,pos='post')
|
|
call prec%set('sub_ovr', p_choice%novr2, info,pos='post')
|
|
call prec%set('sub_restr', p_choice%restr2, info,pos='post')
|
|
call prec%set('sub_prol', p_choice%prol2, info,pos='post')
|
|
call prec%set('sub_solve', p_choice%solve2, info,pos='post')
|
|
call prec%set('sub_fillin', p_choice%fill2, info,pos='post')
|
|
call prec%set('sub_iluthrs', p_choice%thr2, info,pos='post')
|
|
end if
|
|
|
|
if (psb_toupper(p_choice%csolve) /= 'DEFLT') then
|
|
call prec%set('coarse_solve', p_choice%csolve, info)
|
|
if (psb_toupper(p_choice%csolve) == 'BJAC') &
|
|
& call prec%set('coarse_subsolve', p_choice%csbsolve, info)
|
|
call prec%set('coarse_mat', p_choice%cmat, info)
|
|
call prec%set('coarse_fillin', p_choice%cfill, info)
|
|
call prec%set('coarse_iluthrs', p_choice%cthres, info)
|
|
call prec%set('coarse_sweeps', p_choice%cjswp, info)
|
|
end if
|
|
|
|
end select
|
|
|
|
! build the preconditioner
|
|
call psb_barrier(ictxt)
|
|
t1 = psb_wtime()
|
|
call prec%hierarchy_build(a,desc_a,info)
|
|
thier = psb_wtime()-t1
|
|
if (info /= psb_success_) then
|
|
call psb_errpush(psb_err_from_subroutine_,name,a_err='mld_hierarchy_bld')
|
|
goto 9999
|
|
end if
|
|
call psb_barrier(ictxt)
|
|
t1 = psb_wtime()
|
|
call prec%smoothers_build(a,desc_a,info)
|
|
tprec = psb_wtime()-t1
|
|
if (info /= psb_success_) then
|
|
call psb_errpush(psb_err_from_subroutine_,name,a_err='mld_smoothers_bld')
|
|
goto 9999
|
|
end if
|
|
|
|
call psb_amx(ictxt, thier)
|
|
call psb_amx(ictxt, tprec)
|
|
|
|
if(iam == psb_root_) then
|
|
write(psb_out_unit,'(" ")')
|
|
write(psb_out_unit,'("Preconditioner: ",a)') trim(p_choice%descr)
|
|
write(psb_out_unit,'("Preconditioner time: ",es12.5)')thier+tprec
|
|
write(psb_out_unit,'(" ")')
|
|
end if
|
|
|
|
!
|
|
! iterative method parameters
|
|
!
|
|
call psb_barrier(ictxt)
|
|
t1 = psb_wtime()
|
|
call psb_krylov(s_choice%kmethd,a,prec,b,x,s_choice%eps,&
|
|
& desc_a,info,itmax=s_choice%itmax,iter=iter,err=err,itrace=s_choice%itrace,&
|
|
& istop=s_choice%istopc,irst=s_choice%irst)
|
|
call psb_barrier(ictxt)
|
|
tslv = psb_wtime() - t1
|
|
|
|
call psb_amx(ictxt,tslv)
|
|
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='solver routine'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
call psb_barrier(ictxt)
|
|
tslv = psb_wtime() - t1
|
|
call psb_amx(ictxt,tslv)
|
|
|
|
! compute residual norms
|
|
call psb_geall(r,desc_a,info)
|
|
call r%zero()
|
|
call psb_geasb(r,desc_a,info)
|
|
call psb_geaxpby(sone,b,szero,r,desc_a,info)
|
|
call psb_spmm(-sone,a,x,sone,r,desc_a,info)
|
|
resmx = psb_genrm2(r,desc_a,info)
|
|
resmxp = psb_geamax(r,desc_a,info)
|
|
|
|
amatsize = a%sizeof()
|
|
descsize = desc_a%sizeof()
|
|
precsize = prec%sizeof()
|
|
call psb_sum(ictxt,amatsize)
|
|
call psb_sum(ictxt,descsize)
|
|
call psb_sum(ictxt,precsize)
|
|
call prec%descr(info)
|
|
if (iam == psb_root_) then
|
|
write(psb_out_unit,'("Computed solution on ",i8," processors")') np
|
|
write(psb_out_unit,'("Krylov method : ",a)') trim(s_choice%kmethd)
|
|
write(psb_out_unit,'("Preconditioner : ",a)') trim(p_choice%descr)
|
|
write(psb_out_unit,'("Iterations to convergence : ",i12)') iter
|
|
write(psb_out_unit,'("Relative error estimate on exit : ",es12.5)') err
|
|
write(psb_out_unit,'("Number of levels in hierarchy : ",i12)') prec%get_nlevs()
|
|
write(psb_out_unit,'("Time to build hierarchy : ",es12.5)') thier
|
|
write(psb_out_unit,'("Time to build smoothers : ",es12.5)') tprec
|
|
write(psb_out_unit,'("Total time for preconditioner : ",es12.5)') tprec+thier
|
|
write(psb_out_unit,'("Time to solve system : ",es12.5)') tslv
|
|
write(psb_out_unit,'("Time per iteration : ",es12.5)') tslv/iter
|
|
write(psb_out_unit,'("Total time : ",es12.5)') tslv+tprec+thier
|
|
write(psb_out_unit,'("Residual 2-norm : ",es12.5)') resmx
|
|
write(psb_out_unit,'("Residual inf-norm : ",es12.5)') resmxp
|
|
write(psb_out_unit,'("Total memory occupation for A : ",i12)') amatsize
|
|
write(psb_out_unit,'("Total memory occupation for DESC_A : ",i12)') descsize
|
|
write(psb_out_unit,'("Total memory occupation for PREC : ",i12)') precsize
|
|
write(psb_out_unit,'("Storage format for A : ",a )') a%get_fmt()
|
|
write(psb_out_unit,'("Storage format for DESC_A : ",a )') desc_a%get_fmt()
|
|
|
|
end if
|
|
|
|
!
|
|
! cleanup storage and exit
|
|
!
|
|
call psb_gefree(b,desc_a,info)
|
|
call psb_gefree(x,desc_a,info)
|
|
call psb_spfree(a,desc_a,info)
|
|
call prec%free(info)
|
|
call psb_cdfree(desc_a,info)
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='free routine'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
call psb_exit(ictxt)
|
|
stop
|
|
|
|
9999 continue
|
|
call psb_error(ictxt)
|
|
|
|
contains
|
|
!
|
|
! get iteration parameters from standard input
|
|
!
|
|
!
|
|
! get iteration parameters from standard input
|
|
!
|
|
subroutine get_parms(icontxt,afmt,idim,solve,prec)
|
|
|
|
use psb_base_mod
|
|
implicit none
|
|
|
|
integer(psb_ipk_) :: icontxt, idim
|
|
character(len=*) :: afmt
|
|
type(solverdata) :: solve
|
|
type(precdata) :: prec
|
|
integer(psb_ipk_) :: iam, nm, np
|
|
|
|
call psb_info(icontxt,iam,np)
|
|
|
|
if (iam == psb_root_) then
|
|
! read input data
|
|
!
|
|
call read_data(afmt,psb_inp_unit) ! matrix storage format
|
|
call read_data(idim,psb_inp_unit) ! Discretization grid size
|
|
! Krylov solver data
|
|
call read_data(solve%kmethd,psb_inp_unit) ! Krylov solver
|
|
call read_data(solve%istopc,psb_inp_unit) ! stopping criterion
|
|
call read_data(solve%itmax,psb_inp_unit) ! max num iterations
|
|
call read_data(solve%itrace,psb_inp_unit) ! tracing
|
|
call read_data(solve%irst,psb_inp_unit) ! restart
|
|
call read_data(solve%eps,psb_inp_unit) ! tolerance
|
|
! preconditioner type
|
|
call read_data(prec%descr,psb_inp_unit) ! verbose description of the prec
|
|
call read_data(prec%ptype,psb_inp_unit) ! preconditioner type
|
|
! general AMG data
|
|
call read_data(prec%mlcycle,psb_inp_unit) ! AMG cycle type
|
|
call read_data(prec%otr_sweeps,psb_inp_unit) ! number of AMG cycles
|
|
call read_data(prec%maxlevs,psb_inp_unit) ! max number of levels in AMG prec
|
|
call read_data(prec%csize,psb_inp_unit) ! min size coarsest mat
|
|
! aggregation
|
|
call read_data(prec%aggr_prol,psb_inp_unit) ! aggregation type
|
|
call read_data(prec%par_aggr_alg,psb_inp_unit) ! parallel aggregation alg
|
|
call read_data(prec%aggr_ord,psb_inp_unit) ! ordering for aggregation
|
|
call read_data(prec%aggr_filter,psb_inp_unit) ! filtering
|
|
call read_data(prec%mncrratio,psb_inp_unit) ! minimum aggregation ratio
|
|
call read_data(prec%thrvsz,psb_inp_unit) ! size of aggr thresh vector
|
|
if (prec%thrvsz > 0) then
|
|
call psb_realloc(prec%thrvsz,prec%athresv,info)
|
|
call read_data(prec%athresv,psb_inp_unit) ! aggr thresh vector
|
|
else
|
|
read(psb_inp_unit,*) ! dummy read to skip a record
|
|
end if
|
|
call read_data(prec%athres,psb_inp_unit) ! smoothed aggr thresh
|
|
! AMG smoother (or pre-smoother) / 1-lev preconditioner
|
|
call read_data(prec%smther,psb_inp_unit) ! smoother type
|
|
call read_data(prec%jsweeps,psb_inp_unit) ! (pre-)smoother / 1-lev prec sweeps
|
|
call read_data(prec%novr,psb_inp_unit) ! number of overlap layers
|
|
call read_data(prec%restr,psb_inp_unit) ! restriction over application of AS
|
|
call read_data(prec%prol,psb_inp_unit) ! prolongation over application of AS
|
|
call read_data(prec%solve,psb_inp_unit) ! local subsolver
|
|
call read_data(prec%fill,psb_inp_unit) ! fill-in for incomplete LU
|
|
call read_data(prec%thr,psb_inp_unit) ! threshold for ILUT
|
|
! AMG post-smoother
|
|
call read_data(prec%smther2,psb_inp_unit) ! smoother type
|
|
call read_data(prec%jsweeps2,psb_inp_unit) ! (post-)smoother sweeps
|
|
call read_data(prec%novr2,psb_inp_unit) ! number of overlap layers
|
|
call read_data(prec%restr2,psb_inp_unit) ! restriction over application of AS
|
|
call read_data(prec%prol2,psb_inp_unit) ! prolongation over application of AS
|
|
call read_data(prec%solve2,psb_inp_unit) ! local subsolver
|
|
call read_data(prec%fill2,psb_inp_unit) ! fill-in for incomplete LU
|
|
call read_data(prec%thr2,psb_inp_unit) ! threshold for ILUT
|
|
! coasest-level solver
|
|
call read_data(prec%csolve,psb_inp_unit) ! coarsest-lev solver
|
|
call read_data(prec%csbsolve,psb_inp_unit) ! coarsest-lev subsolver
|
|
call read_data(prec%cmat,psb_inp_unit) ! coarsest mat layout
|
|
call read_data(prec%cfill,psb_inp_unit) ! fill-in for incompl LU
|
|
call read_data(prec%cthres,psb_inp_unit) ! Threshold for ILUT
|
|
call read_data(prec%cjswp,psb_inp_unit) ! sweeps for GS/JAC subsolver
|
|
end if
|
|
|
|
call psb_bcast(icontxt,afmt)
|
|
call psb_bcast(icontxt,idim)
|
|
|
|
call psb_bcast(icontxt,solve%kmethd)
|
|
call psb_bcast(icontxt,solve%istopc)
|
|
call psb_bcast(icontxt,solve%itmax)
|
|
call psb_bcast(icontxt,solve%itrace)
|
|
call psb_bcast(icontxt,solve%irst)
|
|
call psb_bcast(icontxt,solve%eps)
|
|
|
|
call psb_bcast(icontxt,prec%descr)
|
|
call psb_bcast(icontxt,prec%ptype)
|
|
|
|
! broadcast first (pre-)smoother / 1-lev prec data
|
|
call psb_bcast(icontxt,prec%smther) ! actually not needed for 1-lev precs
|
|
call psb_bcast(icontxt,prec%jsweeps)
|
|
call psb_bcast(icontxt,prec%novr)
|
|
call psb_bcast(icontxt,prec%restr)
|
|
call psb_bcast(icontxt,prec%prol)
|
|
call psb_bcast(icontxt,prec%solve)
|
|
call psb_bcast(icontxt,prec%fill)
|
|
call psb_bcast(icontxt,prec%thr)
|
|
|
|
! broadcast (other) AMG parameters
|
|
if (psb_toupper(prec%ptype) == 'ML') then
|
|
|
|
call psb_bcast(icontxt,prec%mlcycle)
|
|
call psb_bcast(icontxt,prec%otr_sweeps)
|
|
call psb_bcast(icontxt,prec%maxlevs)
|
|
|
|
call psb_bcast(icontxt,prec%smther2)
|
|
call psb_bcast(icontxt,prec%jsweeps2)
|
|
call psb_bcast(icontxt,prec%novr2)
|
|
call psb_bcast(icontxt,prec%restr2)
|
|
call psb_bcast(icontxt,prec%prol2)
|
|
call psb_bcast(icontxt,prec%solve2)
|
|
call psb_bcast(icontxt,prec%fill2)
|
|
call psb_bcast(icontxt,prec%thr2)
|
|
|
|
call psb_bcast(icontxt,prec%aggr_prol)
|
|
call psb_bcast(icontxt,prec%par_aggr_alg)
|
|
call psb_bcast(icontxt,prec%aggr_ord)
|
|
call psb_bcast(icontxt,prec%aggr_filter)
|
|
call psb_bcast(icontxt,prec%mncrratio)
|
|
call psb_bcast(ictxt,prec%thrvsz)
|
|
if (prec%thrvsz > 0) then
|
|
if (iam /= psb_root_) call psb_realloc(prec%thrvsz,prec%athresv,info)
|
|
call psb_bcast(ictxt,prec%athresv)
|
|
end if
|
|
call psb_bcast(ictxt,prec%athres)
|
|
|
|
call psb_bcast(icontxt,prec%csize)
|
|
call psb_bcast(icontxt,prec%cmat)
|
|
call psb_bcast(icontxt,prec%csolve)
|
|
call psb_bcast(icontxt,prec%csbsolve)
|
|
call psb_bcast(icontxt,prec%cfill)
|
|
call psb_bcast(icontxt,prec%cthres)
|
|
call psb_bcast(icontxt,prec%cjswp)
|
|
|
|
end if
|
|
|
|
end subroutine get_parms
|
|
|
|
end program mld_s_pde2d
|