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.
494 lines
20 KiB
Fortran
494 lines
20 KiB
Fortran
!!$
|
|
!!$
|
|
!!$ MLD2P4 version 2.0
|
|
!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
|
|
!!$ based on PSBLAS (Parallel Sparse BLAS version 3.0)
|
|
!!$
|
|
!!$ (C) Copyright 2008,2009,2010
|
|
!!$
|
|
!!$ 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
|
|
!!$ 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.
|
|
!!$
|
|
!!$
|
|
program zf_sample
|
|
use psb_base_mod
|
|
use mld_prec_mod
|
|
use psb_krylov_mod
|
|
use psb_util_mod
|
|
use data_input
|
|
implicit none
|
|
|
|
|
|
! input parameters
|
|
character(len=40) :: kmethd, mtrx_file, rhs_file
|
|
character(len=2) :: filefmt
|
|
type precdata
|
|
character(len=20) :: descr ! verbose description of the prec
|
|
character(len=10) :: prec ! overall prectype
|
|
integer :: novr ! number of overlap layers
|
|
integer :: jsweeps ! Jacobi/smoother sweeps
|
|
character(len=16) :: restr ! restriction over application of AS
|
|
character(len=16) :: prol ! prolongation over application of AS
|
|
character(len=16) :: solve ! factorization type: ILU, SuperLU, UMFPACK
|
|
integer :: fill ! fillin for factorization
|
|
real(psb_dpk_) :: thr ! threshold for fact. ILU(T)
|
|
character(len=16) :: smther ! Smoother
|
|
integer :: nlev ! number of levels in multilevel prec.
|
|
character(len=16) :: aggrkind ! smoothed, raw aggregation
|
|
character(len=16) :: aggr_alg ! aggregation algorithm (currently only decoupled)
|
|
character(len=16) :: mltype ! additive or multiplicative multi-level prec
|
|
character(len=16) :: smthpos ! side: pre, post, both smoothing
|
|
character(len=16) :: cmat ! coarse mat: distributed, replicated
|
|
character(len=16) :: csolve ! coarse solver: bjac, umf, slu, sludist
|
|
character(len=16) :: csbsolve ! coarse subsolver: ILU, ILU(T), SuperLU, UMFPACK
|
|
integer :: cfill ! fillin for coarse factorization
|
|
real(psb_dpk_) :: cthres ! threshold for coarse fact. ILU(T)
|
|
integer :: cjswp ! block-Jacobi sweeps
|
|
real(psb_dpk_) :: athres ! smoothed aggregation threshold
|
|
end type precdata
|
|
type(precdata) :: prec_choice
|
|
|
|
! sparse matrices
|
|
type(psb_zspmat_type) :: a, aux_a
|
|
|
|
! preconditioner data
|
|
type(mld_zprec_type) :: prec
|
|
|
|
! dense matrices
|
|
complex(psb_dpk_), allocatable, target :: aux_b(:,:), d(:)
|
|
complex(psb_dpk_), allocatable , save :: x_col_glob(:), r_col_glob(:)
|
|
complex(psb_dpk_), pointer :: b_col_glob(:)
|
|
type(psb_z_vect_type) :: b_col, x_col, r_col
|
|
|
|
! communications data structure
|
|
type(psb_desc_type):: desc_a
|
|
|
|
integer :: ictxt, iam, np
|
|
|
|
! solver paramters
|
|
integer :: iter, itmax, ierr, itrace, ircode, ipart,&
|
|
& methd, istopc, irst, nlv
|
|
integer(psb_long_int_k_) :: amatsize, precsize, descsize
|
|
real(psb_dpk_) :: err, eps
|
|
|
|
character(len=5) :: afmt
|
|
character(len=20) :: name
|
|
integer, parameter :: iunit=12
|
|
integer :: iparm(20)
|
|
|
|
! other variables
|
|
integer :: i,info,j,m_problem
|
|
integer :: internal, m,ii,nnzero
|
|
real(psb_dpk_) :: t1, t2, tprec
|
|
real(psb_dpk_) :: r_amax, b_amax, scale,resmx,resmxp
|
|
integer :: nrhs, nrow, n_row, dim, nv, ne
|
|
integer, allocatable :: ivg(:), ipv(:)
|
|
|
|
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
|
|
|
|
|
|
name='df_sample'
|
|
if(psb_get_errstatus() /= 0) goto 9999
|
|
info=psb_success_
|
|
call psb_set_errverbosity(2)
|
|
!
|
|
! 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,mtrx_file,rhs_file,filefmt,kmethd,&
|
|
& prec_choice,ipart,afmt,istopc,itmax,itrace,irst,eps)
|
|
|
|
call psb_barrier(ictxt)
|
|
t1 = psb_wtime()
|
|
! read the input matrix to be processed and (possibly) the rhs
|
|
nrhs = 1
|
|
|
|
if (iam == psb_root_) then
|
|
select case(psb_toupper(filefmt))
|
|
case('MM')
|
|
! For Matrix Market we have an input file for the matrix
|
|
! and an (optional) second file for the RHS.
|
|
call mm_mat_read(aux_a,info,iunit=iunit,filename=mtrx_file)
|
|
if (info == psb_success_) then
|
|
if (rhs_file /= 'NONE') then
|
|
call mm_vet_read(aux_b,info,iunit=iunit,filename=rhs_file)
|
|
end if
|
|
end if
|
|
|
|
case ('HB')
|
|
! For Harwell-Boeing we have a single file which may or may not
|
|
! contain an RHS.
|
|
call hb_read(aux_a,info,iunit=iunit,b=aux_b,filename=mtrx_file)
|
|
|
|
case default
|
|
info = -1
|
|
write(psb_err_unit,*) 'Wrong choice for fileformat ', filefmt
|
|
end select
|
|
if (info /= psb_success_) then
|
|
write(psb_err_unit,*) 'Error while reading input matrix '
|
|
call psb_abort(ictxt)
|
|
end if
|
|
|
|
m_problem = aux_a%get_nrows()
|
|
call psb_bcast(ictxt,m_problem)
|
|
|
|
! At this point aux_b may still be unallocated
|
|
if (psb_size(aux_b,dim=1) == m_problem) then
|
|
! if any rhs were present, broadcast the first one
|
|
write(psb_err_unit,'("Ok, got an rhs ")')
|
|
b_col_glob =>aux_b(:,1)
|
|
else
|
|
write(psb_out_unit,'("Generating an rhs...")')
|
|
write(psb_out_unit,'(" ")')
|
|
call psb_realloc(m_problem,1,aux_b,ircode)
|
|
if (ircode /= 0) then
|
|
call psb_errpush(psb_err_alloc_dealloc_,name)
|
|
goto 9999
|
|
endif
|
|
|
|
b_col_glob => aux_b(:,1)
|
|
do i=1, m_problem
|
|
b_col_glob(i) = 1.d0
|
|
enddo
|
|
endif
|
|
call psb_bcast(ictxt,b_col_glob(1:m_problem))
|
|
else
|
|
call psb_bcast(ictxt,m_problem)
|
|
call psb_realloc(m_problem,1,aux_b,ircode)
|
|
if (ircode /= 0) then
|
|
call psb_errpush(psb_err_alloc_dealloc_,name)
|
|
goto 9999
|
|
endif
|
|
b_col_glob =>aux_b(:,1)
|
|
call psb_bcast(ictxt,b_col_glob(1:m_problem))
|
|
end if
|
|
|
|
! switch over different partition types
|
|
if (ipart == 0) then
|
|
call psb_barrier(ictxt)
|
|
if (iam == psb_root_) write(psb_out_unit,'("Partition type: block")')
|
|
allocate(ivg(m_problem),ipv(np))
|
|
do i=1,m_problem
|
|
call part_block(i,m_problem,np,ipv,nv)
|
|
ivg(i) = ipv(1)
|
|
enddo
|
|
call psb_matdist(aux_a, a, ictxt, &
|
|
& desc_a,b_col_glob,b_col,info,fmt=afmt,v=ivg)
|
|
else if (ipart == 2) then
|
|
if (iam == psb_root_) then
|
|
write(psb_out_unit,'("Partition type: graph")')
|
|
write(psb_out_unit,'(" ")')
|
|
! write(psb_err_unit,'("Build type: graph")')
|
|
call build_mtpart(aux_a,np)
|
|
endif
|
|
!!$ call psb_barrier(ictxt)
|
|
call distr_mtpart(psb_root_,ictxt)
|
|
call getv_mtpart(ivg)
|
|
call psb_matdist(aux_a, a, ictxt, &
|
|
& desc_a,b_col_glob,b_col,info,fmt=afmt,v=ivg)
|
|
else
|
|
if (iam == psb_root_) write(psb_out_unit,'("Partition type: block")')
|
|
call psb_matdist(aux_a, a, ictxt, &
|
|
& desc_a,b_col_glob,b_col,info,fmt=afmt,parts=part_block)
|
|
end if
|
|
|
|
call psb_geall(x_col,desc_a,info)
|
|
call x_col%set(zzero)
|
|
call psb_geasb(x_col,desc_a,info)
|
|
call psb_geall(r_col,desc_a,info)
|
|
call r_col%set(zzero)
|
|
call psb_geasb(r_col,desc_a,info)
|
|
t2 = psb_wtime() - t1
|
|
|
|
|
|
call psb_amx(ictxt, t2)
|
|
|
|
if (iam == psb_root_) then
|
|
write(psb_out_unit,'(" ")')
|
|
write(psb_out_unit,'("Time to read and partition matrix : ",es12.5)')t2
|
|
write(psb_out_unit,'(" ")')
|
|
write(psb_out_unit,*) 'Preconditioner: ',prec_choice%descr
|
|
end if
|
|
|
|
!
|
|
|
|
if (psb_toupper(prec_choice%prec) == 'ML') then
|
|
nlv = prec_choice%nlev
|
|
call mld_precinit(prec,prec_choice%prec,info,nlev=nlv)
|
|
call mld_precset(prec,mld_smoother_type_, prec_choice%smther, info)
|
|
call mld_precset(prec,mld_smoother_sweeps_, prec_choice%jsweeps, info)
|
|
call mld_precset(prec,mld_sub_ovr_, prec_choice%novr, info)
|
|
call mld_precset(prec,mld_sub_restr_, prec_choice%restr, info)
|
|
call mld_precset(prec,mld_sub_prol_, prec_choice%prol, info)
|
|
call mld_precset(prec,mld_sub_solve_, prec_choice%solve, info)
|
|
call mld_precset(prec,mld_sub_fillin_, prec_choice%fill, info)
|
|
call mld_precset(prec,mld_sub_iluthrs_, prec_choice%thr, info)
|
|
call mld_precset(prec,mld_aggr_kind_, prec_choice%aggrkind,info)
|
|
call mld_precset(prec,mld_aggr_alg_, prec_choice%aggr_alg,info)
|
|
call mld_precset(prec,mld_ml_type_, prec_choice%mltype, info)
|
|
call mld_precset(prec,mld_smoother_pos_, prec_choice%smthpos, info)
|
|
call mld_precset(prec,mld_aggr_thresh_, prec_choice%athres, info)
|
|
call mld_precset(prec,mld_coarse_solve_, prec_choice%csolve, info)
|
|
call mld_precset(prec,mld_coarse_subsolve_, prec_choice%csbsolve,info)
|
|
call mld_precset(prec,mld_coarse_mat_, prec_choice%cmat, info)
|
|
call mld_precset(prec,mld_coarse_fillin_, prec_choice%cfill, info)
|
|
call mld_precset(prec,mld_coarse_iluthrs_, prec_choice%cthres, info)
|
|
call mld_precset(prec,mld_coarse_sweeps_, prec_choice%cjswp, info)
|
|
else
|
|
nlv = 1
|
|
call mld_precinit(prec,prec_choice%prec,info)
|
|
call mld_precset(prec,mld_smoother_sweeps_, prec_choice%jsweeps, info)
|
|
call mld_precset(prec,mld_sub_ovr_, prec_choice%novr, info)
|
|
call mld_precset(prec,mld_sub_restr_, prec_choice%restr, info)
|
|
call mld_precset(prec,mld_sub_prol_, prec_choice%prol, info)
|
|
call mld_precset(prec,mld_sub_solve_, prec_choice%solve, info)
|
|
call mld_precset(prec,mld_sub_fillin_, prec_choice%fill, info)
|
|
call mld_precset(prec,mld_sub_iluthrs_, prec_choice%thr, info)
|
|
end if
|
|
|
|
! building the preconditioner
|
|
t1 = psb_wtime()
|
|
call mld_precbld(a,desc_a,prec,info)
|
|
tprec = psb_wtime()-t1
|
|
if (info /= psb_success_) then
|
|
call psb_errpush(psb_err_from_subroutine_,name,a_err='psb_precbld')
|
|
goto 9999
|
|
end if
|
|
|
|
call psb_amx(ictxt, tprec)
|
|
|
|
if(iam == psb_root_) then
|
|
write(psb_out_unit,'("Preconditioner time: ",es12.5)')tprec
|
|
write(psb_out_unit,'(" ")')
|
|
end if
|
|
|
|
iparm = 0
|
|
call psb_barrier(ictxt)
|
|
t1 = psb_wtime()
|
|
call psb_krylov(kmethd,a,prec,b_col,x_col,eps,desc_a,info,&
|
|
& itmax=itmax,iter=iter,err=err,itrace=itrace,istop=istopc,irst=irst)
|
|
call psb_barrier(ictxt)
|
|
t2 = psb_wtime() - t1
|
|
|
|
call psb_amx(ictxt,t2)
|
|
call psb_geaxpby(zone,b_col,zzero,r_col,desc_a,info)
|
|
call psb_spmm(-zone,a,x_col,zone,r_col,desc_a,info)
|
|
resmx = psb_genrm2(r_col,desc_a,info)
|
|
resmxp = psb_geamax(r_col,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)
|
|
if (iam == psb_root_) then
|
|
call mld_precdescr(prec,info)
|
|
write(psb_out_unit,'("Matrix: ",a)')mtrx_file
|
|
write(psb_out_unit,'("Computed solution on ",i8," processors")')np
|
|
write(psb_out_unit,'("Iterations to convergence : ",i6)')iter
|
|
write(psb_out_unit,'("Error estimate on exit : ",es12.5)')err
|
|
write(psb_out_unit,'("Time to buil prec. : ",es12.5)')tprec
|
|
write(psb_out_unit,'("Time to solve matrix : ",es12.5)')t2
|
|
write(psb_out_unit,'("Time per iteration : ",es12.5)')t2/(iter)
|
|
write(psb_out_unit,'("Total time : ",es12.5)')t2+tprec
|
|
write(psb_out_unit,'("Residual norm 2 : ",es12.5)')resmx
|
|
write(psb_out_unit,'("Residual norm inf : ",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
|
|
end if
|
|
|
|
allocate(x_col_glob(m_problem),r_col_glob(m_problem),stat=ierr)
|
|
if (ierr /= 0) then
|
|
write(psb_err_unit,*) 'allocation error: no data collection'
|
|
else
|
|
call psb_gather(x_col_glob,x_col,desc_a,info,root=psb_root_)
|
|
call psb_gather(r_col_glob,r_col,desc_a,info,root=psb_root_)
|
|
if (iam == psb_root_) then
|
|
write(psb_err_unit,'(" ")')
|
|
write(psb_err_unit,'("Saving x on file")')
|
|
write(20,*) 'matrix: ',mtrx_file
|
|
write(20,*) 'computed solution on ',np,' processors.'
|
|
write(20,*) 'iterations to convergence: ',iter
|
|
write(20,*) 'error estimate (infinity norm) on exit:', &
|
|
& ' ||r||/(||a||||x||+||b||) = ',err
|
|
write(20,'("Residual norm 2 : ",es12.5)')resmx
|
|
write(20,'("Residual norm inf : ",es12.5)')resmxp
|
|
write(20,'(a8,4(2x,a20))') 'I','X(I)','R(I)','B(I)'
|
|
do i=1,m_problem
|
|
write(20,998) i,x_col_glob(i),r_col_glob(i),b_col_glob(i)
|
|
enddo
|
|
end if
|
|
end if
|
|
998 format(i8,4(2x,g20.14))
|
|
993 format(i6,4(1x,e12.6))
|
|
|
|
|
|
call psb_gefree(b_col, desc_a,info)
|
|
call psb_gefree(x_col, desc_a,info)
|
|
call psb_spfree(a, desc_a,info)
|
|
call mld_precfree(prec,info)
|
|
call psb_cdfree(desc_a,info)
|
|
|
|
9999 continue
|
|
if(info /= psb_success_) then
|
|
call psb_error(ictxt)
|
|
end if
|
|
call psb_exit(ictxt)
|
|
stop
|
|
|
|
contains
|
|
!
|
|
! get iteration parameters from standard input
|
|
!
|
|
subroutine get_parms(icontxt,mtrx,rhs,filefmt,kmethd,&
|
|
& prec, ipart,afmt,istopc,itmax,itrace,irst,eps)
|
|
|
|
use psb_base_mod
|
|
implicit none
|
|
|
|
integer :: icontxt
|
|
character(len=*) :: kmethd, mtrx, rhs, afmt,filefmt
|
|
type(precdata) :: prec
|
|
real(psb_dpk_) :: eps
|
|
integer :: iret, istopc,itmax,itrace, ipart, irst
|
|
integer :: iam, nm, np, i
|
|
|
|
call psb_info(icontxt,iam,np)
|
|
|
|
if (iam == psb_root_) then
|
|
! read input parameters
|
|
call read_data(mtrx,5)
|
|
call read_data(rhs,5)
|
|
call read_data(filefmt,5)
|
|
call read_data(kmethd,5)
|
|
call read_data(afmt,5)
|
|
call read_data(ipart,5)
|
|
call read_data(istopc,5)
|
|
call read_data(itmax,5)
|
|
call read_data(itrace,5)
|
|
call read_data(irst,5)
|
|
call read_data(eps,5)
|
|
call read_data(prec%descr,5) ! verbose description of the prec
|
|
call read_data(prec%prec,5) ! overall prectype
|
|
call read_data(prec%novr,5) ! number of overlap layers
|
|
call read_data(prec%restr,5) ! restriction over application of as
|
|
call read_data(prec%prol,5) ! prolongation over application of as
|
|
call read_data(prec%solve,5) ! Factorization type: ILU, SuperLU, UMFPACK.
|
|
call read_data(prec%fill,5) ! Fill-in for factorization
|
|
call read_data(prec%thr,5) ! Threshold for fact. ILU(T)
|
|
call read_data(prec%jsweeps,5) ! Jacobi sweeps for PJAC
|
|
if (psb_toupper(prec%prec) == 'ML') then
|
|
call read_data(prec%nlev,5) ! Number of levels in multilevel prec.
|
|
call read_data(prec%smther,5) ! Smoother type.
|
|
call read_data(prec%aggrkind,5) ! smoothed/raw aggregatin
|
|
call read_data(prec%aggr_alg,5) ! local or global aggregation
|
|
call read_data(prec%mltype,5) ! additive or multiplicative 2nd level prec
|
|
call read_data(prec%smthpos,5) ! side: pre, post, both smoothing
|
|
call read_data(prec%cmat,5) ! coarse mat
|
|
call read_data(prec%csolve,5) ! Factorization type: ILU, SuperLU, UMFPACK.
|
|
call read_data(prec%csbsolve,5) ! Factorization type: ILU, SuperLU, UMFPACK.
|
|
call read_data(prec%cfill,5) ! Fill-in for factorization
|
|
call read_data(prec%cthres,5) ! Threshold for fact. ILU(T)
|
|
call read_data(prec%cjswp,5) ! Jacobi sweeps
|
|
call read_data(prec%athres,5) ! smoother aggr thresh
|
|
end if
|
|
end if
|
|
|
|
call psb_bcast(icontxt,mtrx)
|
|
call psb_bcast(icontxt,rhs)
|
|
call psb_bcast(icontxt,filefmt)
|
|
call psb_bcast(icontxt,kmethd)
|
|
call psb_bcast(icontxt,afmt)
|
|
call psb_bcast(icontxt,ipart)
|
|
call psb_bcast(icontxt,istopc)
|
|
call psb_bcast(icontxt,itmax)
|
|
call psb_bcast(icontxt,itrace)
|
|
call psb_bcast(icontxt,irst)
|
|
call psb_bcast(icontxt,eps)
|
|
|
|
call psb_bcast(icontxt,prec%descr) ! verbose description of the prec
|
|
call psb_bcast(icontxt,prec%prec) ! overall prectype
|
|
call psb_bcast(icontxt,prec%novr) ! number of overlap layers
|
|
call psb_bcast(icontxt,prec%restr) ! restriction over application of as
|
|
call psb_bcast(icontxt,prec%prol) ! prolongation over application of as
|
|
call psb_bcast(icontxt,prec%solve) ! Factorization type: ILU, SuperLU, UMFPACK.
|
|
call psb_bcast(icontxt,prec%fill) ! Fill-in for factorization
|
|
call psb_bcast(icontxt,prec%thr) ! Threshold for fact. ILU(T)
|
|
call psb_bcast(icontxt,prec%jsweeps) ! Jacobi sweeps
|
|
if (psb_toupper(prec%prec) == 'ML') then
|
|
call psb_bcast(icontxt,prec%smther) ! Smoother type.
|
|
call psb_bcast(icontxt,prec%nlev) ! Number of levels in multilevel prec.
|
|
call psb_bcast(icontxt,prec%aggrkind) ! smoothed/raw aggregatin
|
|
call psb_bcast(icontxt,prec%aggr_alg) ! local or global aggregation
|
|
call psb_bcast(icontxt,prec%mltype) ! additive or multiplicative 2nd level prec
|
|
call psb_bcast(icontxt,prec%smthpos) ! side: pre, post, both smoothing
|
|
call psb_bcast(icontxt,prec%cmat) ! coarse mat
|
|
call psb_bcast(icontxt,prec%csolve) ! Factorization type: ILU, SuperLU, UMFPACK.
|
|
call psb_bcast(icontxt,prec%csbsolve) ! Factorization type: ILU, SuperLU, UMFPACK.
|
|
call psb_bcast(icontxt,prec%cfill) ! Fill-in for factorization
|
|
call psb_bcast(icontxt,prec%cthres) ! Threshold for fact. ILU(T)
|
|
call psb_bcast(icontxt,prec%cjswp) ! Jacobi sweeps
|
|
call psb_bcast(icontxt,prec%athres) ! smoother aggr thresh
|
|
end if
|
|
|
|
end subroutine get_parms
|
|
subroutine pr_usage(iout)
|
|
integer iout
|
|
write(iout, *) ' number of parameters is incorrect!'
|
|
write(iout, *) ' use: hb_sample mtrx_file methd prec [ptype &
|
|
&itmax istopc itrace]'
|
|
write(iout, *) ' where:'
|
|
write(iout, *) ' mtrx_file is stored in hb format'
|
|
write(iout, *) ' methd may be: cgstab '
|
|
write(iout, *) ' itmax max iterations [500] '
|
|
write(iout, *) ' istopc stopping criterion [1] '
|
|
write(iout, *) ' itrace 0 (no tracing, default) or '
|
|
write(iout, *) ' >= 0 do tracing every itrace'
|
|
write(iout, *) ' iterations '
|
|
write(iout, *) ' prec may be: ilu diagsc none'
|
|
write(iout, *) ' ptype partition strategy default 0'
|
|
write(iout, *) ' 0: block partition '
|
|
end subroutine pr_usage
|
|
end program zf_sample
|