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381 lines
12 KiB
Fortran
381 lines
12 KiB
Fortran
program psb_dbf_sample
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use psb_base_mod
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use psb_prec_mod
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use psb_krylov_mod
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use psb_util_mod
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implicit none
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! input parameters
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character(len=40) :: kmethd, ptype, mtrx_file, rhs_file
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! sparse matrices
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type(psb_dspmat_type) :: a
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type(psb_ldspmat_type) :: aux_a
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! preconditioner data
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type(psb_dprec_type) :: prec
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! dense matrices
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real(psb_dpk_), allocatable, target :: aux_b(:,:)
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real(psb_dpk_), allocatable, save :: x_mv_glob(:,:), r_mv_glob(:,:)
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real(psb_dpk_), pointer :: b_mv_glob(:,:)
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type(psb_d_multivect_type) :: b_mv, x_mv, r_mv
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integer(psb_ipk_) :: m, nrhs
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real(psb_dpk_) :: random_value
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real(psb_dpk_), allocatable :: test(:)
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! communications data structure
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type(psb_desc_type) :: desc_a
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type(psb_ctxt_type) :: ctxt
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integer(psb_ipk_) :: iam, np
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integer(psb_lpk_) :: lnp
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! solver paramters
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integer(psb_ipk_) :: iter, itmax, ierr, itrace, ircode, methd, istopc
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integer(psb_epk_) :: amatsize, precsize, descsize
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real(psb_dpk_) :: err, eps
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! input parameters
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character(len=5) :: afmt
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character(len=20) :: name, part
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character(len=2) :: filefmt
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integer(psb_ipk_), parameter :: iunit=12
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! other variables
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integer(psb_ipk_) :: i, j, info
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real(psb_dpk_) :: t1, t2, tprec
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real(psb_dpk_), allocatable :: resmx(:)
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real(psb_dpk_) :: resmxp
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integer(psb_ipk_), allocatable :: ivg(:)
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logical :: print_matrix = .true.
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call psb_init(ctxt)
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call psb_info(ctxt,iam,np)
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if (iam < 0) then
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! This should not happen, but just in case
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call psb_exit(ctxt)
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stop
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endif
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name='psb_dbf_sample'
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if(psb_errstatus_fatal()) goto 9999
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info=psb_success_
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call psb_set_errverbosity(itwo)
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!
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! Hello world
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!
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if (iam == psb_root_) then
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write(psb_out_unit,'(" ")')
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write(psb_out_unit,'("Welcome to PSBLAS version: ",a)') psb_version_string_
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write(psb_out_unit,'("This is the ",a," sample program")') trim(name)
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write(psb_out_unit,'(" ")')
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end if
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!
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! get parameters
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!
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call get_parms(ctxt,mtrx_file,rhs_file,filefmt,kmethd,ptype,&
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& part,afmt,nrhs,istopc,itmax,itrace,eps)
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call psb_barrier(ctxt)
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t1 = psb_wtime()
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if (iam == psb_root_) then
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select case(psb_toupper(filefmt))
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case('MM')
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! For Matrix Market we have an input file for the matrix
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! and an (optional) second file for the RHS.
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call mm_mat_read(aux_a,info,iunit=iunit,filename=mtrx_file)
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if (info == psb_success_) then
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if (rhs_file /= 'NONE') then
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call mm_array_read(aux_b,info,iunit=iunit,filename=rhs_file)
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end if
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end if
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case ('HB')
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! For Harwell-Boeing we have a single file which may or may not
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! contain an RHS.
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call hb_read(aux_a,info,iunit=iunit,b=aux_b,filename=mtrx_file)
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case default
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info = -1
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write(psb_err_unit,*) 'Wrong choice for fileformat ', filefmt
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end select
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if (info /= psb_success_) then
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write(psb_err_unit,*) 'Error while reading input matrix '
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call psb_abort(ctxt)
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end if
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m = aux_a%get_nrows()
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call psb_bcast(ctxt,m)
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! At this point aux_b may still be unallocated
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if (size(aux_b) == m*nrhs) then
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! if any rhs were present, broadcast the first one
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write(psb_err_unit,'("Ok, got an rhs ")')
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b_mv_glob =>aux_b(:,:)
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else
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write(psb_out_unit,'("Generating an rhs...")')
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write(psb_out_unit,'("Number of RHS: ",i3)') nrhs
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write(psb_out_unit,'(" ")')
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call psb_realloc(m,nrhs,aux_b,ircode)
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if (ircode /= 0) then
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call psb_errpush(psb_err_alloc_dealloc_,name)
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goto 9999
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endif
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b_mv_glob => aux_b(:,:)
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do i=1, m
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do j=1, nrhs
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b_mv_glob(i,j) = done
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!call random_number(random_value)
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!b_mv_glob(i,j) = random_value
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enddo
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enddo
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endif
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else
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call psb_bcast(ctxt,m)
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end if
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! switch over different partition types
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select case(psb_toupper(part))
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case('BLOCK')
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if (iam == psb_root_) write(psb_out_unit,'("Partition type: block")')
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call psb_matdist(aux_a,a,ctxt,desc_a,info,fmt=afmt,parts=part_block)
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case('GRAPH')
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if (iam == psb_root_) then
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write(psb_out_unit,'("Partition type: graph vector")')
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write(psb_out_unit,'(" ")')
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call aux_a%cscnv(info,type='csr')
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lnp = np
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call build_mtpart(aux_a,lnp)
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endif
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call psb_barrier(ctxt)
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call distr_mtpart(psb_root_,ctxt)
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call getv_mtpart(ivg)
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call psb_matdist(aux_a,a,ctxt,desc_a,info,fmt=afmt,vg=ivg)
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case default
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if (iam == psb_root_) write(psb_out_unit,'("Partition type: block")')
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call psb_matdist(aux_a,a,ctxt,desc_a,info,fmt=afmt,parts=part_block)
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end select
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call psb_scatter(b_mv_glob,b_mv,desc_a,info,root=psb_root_)
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call psb_geall(x_mv,desc_a,info,nrhs)
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call x_mv%zero()
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call psb_geasb(x_mv,desc_a,info)
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call psb_geall(r_mv,desc_a,info,nrhs)
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call r_mv%zero()
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call psb_geasb(r_mv,desc_a,info)
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t2 = psb_wtime() - t1
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call psb_amx(ctxt, t2)
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if (iam == psb_root_) then
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write(psb_out_unit,'(" ")')
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write(psb_out_unit,'("Time to read and partition matrix : ",es12.5)')t2
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write(psb_out_unit,'(" ")')
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end if
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! building the preconditioner
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call prec%init(ctxt,ptype,info)
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t1 = psb_wtime()
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call prec%build(a,desc_a,info)
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tprec = psb_wtime()-t1
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,a_err='psb_precbld')
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goto 9999
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end if
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call psb_amx(ctxt,tprec)
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if(iam == psb_root_) then
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write(psb_out_unit,'("Preconditioner time: ",es12.5)')tprec
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write(psb_out_unit,'(" ")')
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write(psb_out_unit,'("Starting algorithm")')
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write(psb_out_unit,'(" ")')
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end if
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call psb_barrier(ctxt)
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t1 = psb_wtime()
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call psb_krylov(kmethd,a,prec,b_mv,x_mv,eps,desc_a,info,&
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& itmax=itmax,iter=iter,err=err,itrace=itrace,istop=istopc)
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call psb_barrier(ctxt)
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t2 = psb_wtime() - t1
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call psb_amx(ctxt,t2)
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if(iam == psb_root_) then
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write(psb_out_unit,'("Finished algorithm")')
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write(psb_out_unit,'(" ")')
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end if
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call psb_geaxpby(done,b_mv,dzero,r_mv,desc_a,info)
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call psb_spmm(-done,a,x_mv,done,r_mv,desc_a,info)
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resmx = psb_genrm2(r_mv,desc_a,info)
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resmxp = psb_geamax(r_mv,desc_a,info)
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amatsize = a%sizeof()
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descsize = desc_a%sizeof()
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precsize = prec%sizeof()
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call psb_sum(ctxt,amatsize)
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call psb_sum(ctxt,descsize)
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call psb_sum(ctxt,precsize)
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call psb_gather(x_mv_glob,x_mv,desc_a,info,root=psb_root_)
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if (info == psb_success_) call psb_gather(r_mv_glob,r_mv,desc_a,info,root=psb_root_)
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if (info /= psb_success_) goto 9999
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if (iam == psb_root_) then
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call prec%descr(info)
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write(psb_out_unit,'(" ")')
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write(psb_out_unit,'("Computed solution on: ",i8," processors")')np
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write(psb_out_unit,'("Matrix: ",a)')mtrx_file
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write(psb_out_unit,'("Storage format for A: ",a)')a%get_fmt()
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write(psb_out_unit,'("Storage format for DESC_A: ",a)')desc_a%get_fmt()
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write(psb_out_unit,'("Total memory occupation for A: ",i12)')amatsize
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write(psb_out_unit,'("Total memory occupation for PREC: ",i12)')precsize
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write(psb_out_unit,'("Total memory occupation for DESC_A: ",i12)')descsize
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write(psb_out_unit,'("Iterations to convergence: ",i12)')iter
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write(psb_out_unit,'("Error estimate on exit: ",es12.5)')err
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write(psb_out_unit,'("Time to buil prec.: ",es12.5)')tprec
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write(psb_out_unit,'("Time to solve system: ",es12.5)')t2
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write(psb_out_unit,'("Time per iteration: ",es12.5)')t2/(iter)
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write(psb_out_unit,'("Total time: ",es12.5)')t2+tprec
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write(psb_out_unit,'("Residual norm 2: ",es12.5)')sum(resmx)/size(resmx)
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write(psb_out_unit,'("Residual norm inf: ",es12.5)')resmxp
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if (print_matrix) then
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write(psb_out_unit,'(a8,4(2x,a20))') 'I','X(I)','R(I)','B(I)'
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do i=1,m
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write(psb_out_unit,993) i, x_mv_glob(i,:), r_mv_glob(i,:), b_mv_glob(i,:)
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end do
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end if
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end if
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998 format(i8,10(2x,g20.14))
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993 format(i6,10(1x,e12.6))
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call psb_gefree(b_mv, desc_a,info)
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call psb_gefree(x_mv, desc_a,info)
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call psb_spfree(a, desc_a,info)
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call prec%free(info)
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call psb_cdfree(desc_a,info)
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call psb_exit(ctxt)
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return
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9999 call psb_error(ctxt)
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return
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contains
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!
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! get iteration parameters from standard input
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!
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subroutine get_parms(ctxt,mtrx_file,rhs_file,filefmt,kmethd,ptype,part,afmt,nrhs,istopc,itmax,itrace,eps)
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type(psb_ctxt_type) :: ctxt
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character(len=2) :: filefmt
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character(len=40) :: kmethd, mtrx_file, rhs_file, ptype
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character(len=20) :: part
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character(len=5) :: afmt
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integer(psb_ipk_) :: nrhs, istopc, itmax, itrace
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real(psb_dpk_) :: eps
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integer(psb_ipk_) :: np, iam
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integer(psb_ipk_) :: ip, inp_unit
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character(len=1024) :: filename
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call psb_info(ctxt, iam, np)
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if (iam == 0) then
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if (command_argument_count()>0) then
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call get_command_argument(1, filename)
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inp_unit = 30
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open(inp_unit, file=filename, action='read', iostat=info)
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if (info /= 0) then
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write(psb_err_unit,*) 'Could not open file ',filename,' for input'
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call psb_abort(ctxt)
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stop
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else
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write(psb_err_unit,*) 'Opened file ',trim(filename),' for input'
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end if
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else
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inp_unit = psb_inp_unit
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end if
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! Read Input Parameters
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read(inp_unit,*) mtrx_file
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read(inp_unit,*) rhs_file
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read(inp_unit,*) filefmt
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read(inp_unit,*) kmethd
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read(inp_unit,*) ptype
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read(inp_unit,*) afmt
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read(inp_unit,*) part
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read(inp_unit,*) nrhs
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read(inp_unit,*) istopc
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read(inp_unit,*) itmax
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read(inp_unit,*) itrace
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read(inp_unit,*) eps
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call psb_bcast(ctxt,mtrx_file)
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call psb_bcast(ctxt,rhs_file)
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call psb_bcast(ctxt,filefmt)
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call psb_bcast(ctxt,kmethd)
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call psb_bcast(ctxt,ptype)
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call psb_bcast(ctxt,afmt)
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call psb_bcast(ctxt,part)
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call psb_bcast(ctxt,nrhs)
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call psb_bcast(ctxt,istopc)
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call psb_bcast(ctxt,itmax)
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call psb_bcast(ctxt,itrace)
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call psb_bcast(ctxt,eps)
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if (inp_unit /= psb_inp_unit) then
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close(inp_unit)
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end if
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else
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! Receive Parameters
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call psb_bcast(ctxt,mtrx_file)
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call psb_bcast(ctxt,rhs_file)
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call psb_bcast(ctxt,filefmt)
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call psb_bcast(ctxt,kmethd)
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call psb_bcast(ctxt,ptype)
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call psb_bcast(ctxt,afmt)
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call psb_bcast(ctxt,part)
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call psb_bcast(ctxt,nrhs)
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call psb_bcast(ctxt,istopc)
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call psb_bcast(ctxt,itmax)
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call psb_bcast(ctxt,itrace)
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call psb_bcast(ctxt,eps)
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end if
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if (iam == 0) then
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write(psb_out_unit,'(" ")')
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write(psb_out_unit,'("Solving matrix : ",a)') mtrx_file
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write(psb_out_unit,'("Data distribution : ",a)') part
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write(psb_out_unit,'("Iterative method : ",a)') kmethd
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write(psb_out_unit,'("Number of processors : ",i0)') np
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write(psb_out_unit,'("Number of RHS : ",i4)') nrhs
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write(psb_out_unit,'("Max number of iterations : ",i3)') itmax
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write(psb_out_unit,'("Storage format : ",a)') afmt
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write(psb_out_unit,'(" ")')
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end if
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return
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end subroutine get_parms
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end program psb_dbf_sample
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