program psb_dbf_sample use psb_base_mod use psb_prec_mod use psb_krylov_mod use psb_util_mod use getp implicit none ! input parameters character(len=40) :: kmethd, ptype, mtrx_file, rhs_file ! sparse matrices type(psb_dspmat_type) :: a type(psb_ldspmat_type) :: aux_a ! preconditioner data type(psb_dprec_type) :: prec ! dense matrices real(psb_dpk_), allocatable, target :: aux_b(:,:) real(psb_dpk_), allocatable, save :: x_mv_glob(:,:), r_mv_glob(:,:) real(psb_dpk_), pointer :: b_mv_glob(:,:) type(psb_d_multivect_type) :: b_mv, x_mv, r_mv integer(psb_ipk_) :: m, nrhs real(psb_dpk_) :: random_value ! communications data structure type(psb_desc_type) :: desc_a type(psb_ctxt_type) :: ctxt integer(psb_ipk_) :: iam, np integer(psb_lpk_) :: lnp ! solver paramters integer(psb_ipk_) :: iter, itmax, ierr, itrace, ircode, methd, istopc, itrs integer(psb_epk_) :: amatsize, precsize, descsize real(psb_dpk_) :: err, eps ! input parameters character(len=5) :: afmt character(len=20) :: name, part character(len=2) :: filefmt integer(psb_ipk_), parameter :: iunit=12 ! other variables integer(psb_ipk_) :: i, j, info real(psb_dpk_) :: t1, t2, tprec real(psb_dpk_) :: resmx, resmxp integer(psb_ipk_), allocatable :: ivg(:) call psb_init(ctxt) call psb_info(ctxt,iam,np) if (iam < 0) then ! This should not happen, but just in case call psb_exit(ctxt) stop endif name='psb_dbf_sample' if(psb_errstatus_fatal()) goto 9999 info=psb_success_ call psb_set_errverbosity(itwo) ! ! Hello world ! if (iam == psb_root_) then write(psb_out_unit,'(" ")') write(psb_out_unit,'("Welcome to PSBLAS version: ",a)') psb_version_string_ write(psb_out_unit,'("This is the ",a," sample program")') trim(name) write(psb_out_unit,'(" ")') end if ! ! get parameters ! call get_parms(ctxt,mtrx_file,rhs_file,filefmt,kmethd,ptype,& & part,afmt,nrhs,istopc,itmax,itrace,itrs,eps) call psb_barrier(ctxt) t1 = psb_wtime() 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_array_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(ctxt) end if m = aux_a%get_nrows() call psb_bcast(ctxt,m) ! At this point aux_b may still be unallocated if (size(aux_b) == m*nrhs) then ! if any rhs were present, broadcast the first one write(psb_err_unit,'("Ok, got an rhs ")') b_mv_glob =>aux_b(:,:) else write(psb_out_unit,'("Generating an rhs...")') write(psb_out_unit,'("Number of RHS: ",i3)') nrhs write(psb_out_unit,'(" ")') call psb_realloc(m,nrhs,aux_b,ircode) if (ircode /= 0) then call psb_errpush(psb_err_alloc_dealloc_,name) goto 9999 endif b_mv_glob => aux_b(:,:) do i=1, m do j=1, nrhs !b_mv_glob(i,j) = done call random_number(random_value) b_mv_glob(i,j) = random_value enddo enddo endif else call psb_bcast(ctxt,m) end if ! switch over different partition types select case(psb_toupper(part)) case('BLOCK') if (iam == psb_root_) write(psb_out_unit,'("Partition type: block")') call psb_matdist(aux_a,a,ctxt,desc_a,info,fmt=afmt,parts=part_block) case('GRAPH') if (iam == psb_root_) then write(psb_out_unit,'("Partition type: graph vector")') write(psb_out_unit,'(" ")') call aux_a%cscnv(info,type='csr') lnp = np call build_mtpart(aux_a,lnp) endif call psb_barrier(ctxt) call distr_mtpart(psb_root_,ctxt) call getv_mtpart(ivg) call psb_matdist(aux_a,a,ctxt,desc_a,info,fmt=afmt,vg=ivg) case default if (iam == psb_root_) write(psb_out_unit,'("Partition type: block")') call psb_matdist(aux_a,a,ctxt,desc_a,info,fmt=afmt,parts=part_block) end select call psb_scatter(b_mv_glob,b_mv,desc_a,info,root=psb_root_) call psb_geall(x_mv,desc_a,info,nrhs) call x_mv%zero() call psb_geasb(x_mv,desc_a,info) call psb_geall(r_mv,desc_a,info,nrhs) call r_mv%zero() call psb_geasb(r_mv,desc_a,info) t2 = psb_wtime() - t1 call psb_amx(ctxt, 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,'(" ")') end if ! building the preconditioner call prec%init(ctxt,ptype,info) t1 = psb_wtime() call prec%build(a,desc_a,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(ctxt,tprec) if(iam == psb_root_) then write(psb_out_unit,'("Preconditioner time: ",es12.5)')tprec write(psb_out_unit,'(" ")') write(psb_out_unit,'("Starting algorithm")') write(psb_out_unit,'(" ")') end if call psb_barrier(ctxt) t1 = psb_wtime() call psb_krylov(kmethd,a,prec,b_mv,x_mv,eps,desc_a,info,& & itmax=itmax,iter=iter,err=err,itrace=itrace,& & itrs=itrs,istop=istopc) call psb_barrier(ctxt) t2 = psb_wtime() - t1 call psb_amx(ctxt,t2) if(iam == psb_root_) then write(psb_out_unit,'("Finished algorithm")') write(psb_out_unit,'(" ")') end if ! TODO spmm cambia X (che senso ha?) call psb_geaxpby(done,b_mv,dzero,r_mv,desc_a,info) call psb_spmm(-done,a,x_mv,done,r_mv,desc_a,info) resmx = psb_genrm2(r_mv,desc_a,info) resmxp = psb_geamax(r_mv,desc_a,info) amatsize = a%sizeof() descsize = desc_a%sizeof() precsize = prec%sizeof() call psb_sum(ctxt,amatsize) call psb_sum(ctxt,descsize) call psb_sum(ctxt,precsize) call psb_gather(x_mv_glob,x_mv,desc_a,info,root=psb_root_) if (info == psb_success_) call psb_gather(r_mv_glob,r_mv,desc_a,info,root=psb_root_) if (info /= psb_success_) goto 9999 if (iam == psb_root_) then call prec%descr(info) write(psb_out_unit,'(" ")') write(psb_out_unit,'("Computed solution on: ",i8," processors")')np write(psb_out_unit,'("Matrix: ",a)')mtrx_file 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() write(psb_out_unit,'("Total memory occupation for A: ",i12)')amatsize write(psb_out_unit,'("Total memory occupation for PREC: ",i12)')precsize write(psb_out_unit,'("Total memory occupation for DESC_A: ",i12)')descsize write(psb_out_unit,'("Iterations to convergence: ",i12)')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 system: ",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,'(" ")') ! TODO ! do i=1,m ! write(psb_out_unit,993) i, x_mv_glob(i,:), r_mv_glob(i,:), b_mv_glob(i,:) ! enddo end if 998 format(i8,4(2x,g20.14)) 993 format(i6,4(1x,e12.6)) call psb_gefree(b_mv, desc_a,info) call psb_gefree(x_mv, desc_a,info) call psb_spfree(a, desc_a,info) call prec%free(info) call psb_cdfree(desc_a,info) call psb_exit(ctxt) return 9999 call psb_error(ctxt) return end program psb_dbf_sample