! ! Parallel Sparse BLAS version 3.5 ! (C) Copyright 2006-2018 ! Salvatore Filippone ! Alfredo Buttari ! ! 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 PSBLAS 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 PSBLAS 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 psb_df_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,renum ! sparse matrices type(psb_dspmat_type) :: a, aux_a ! preconditioner data type(psb_dprec_type) :: prec ! dense matrices real(psb_dpk_), allocatable, target :: aux_b(:,:), d(:) real(psb_dpk_), allocatable , save :: x_col_glob(:), r_col_glob(:) real(psb_dpk_), pointer :: b_col_glob(:) type(psb_d_vect_type) :: b_col, x_col, r_col ! communications data structure type(psb_desc_type):: desc_a integer(psb_ipk_) :: ictxt, iam, np ! solver paramters integer(psb_ipk_) :: iter, itmax, ierr, itrace, ircode,& & methd, istopc, irst integer(psb_long_int_k_) :: amatsize, precsize, descsize real(psb_dpk_) :: err, eps, cond character(len=5) :: afmt character(len=20) :: name, part character(len=2) :: filefmt integer(psb_ipk_), parameter :: iunit=12 integer(psb_ipk_) :: iparm(20) ! other variables integer(psb_ipk_) :: i,info,j,m_problem, err_act integer(psb_ipk_) :: internal, m,ii,nnzero real(psb_dpk_) :: t1, t2, tprec real(psb_dpk_) :: r_amax, b_amax, scale,resmx,resmxp integer(psb_ipk_) :: nrhs, nrow, n_row, dim, ne, nv integer(psb_ipk_), allocatable :: ivg(:), perm(:) integer(psb_ipk_), allocatable :: ipv(:) character(len=40) :: fname, fnout 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='psb_df_sample' if(psb_get_errstatus() /= 0) goto 9999 info=psb_success_ call psb_set_errverbosity(itwo) ! ! Hello world ! if (iam == psb_root_) then write(*,*) 'Welcome to PSBLAS version: ',psb_version_string_ write(*,*) 'This is the ',trim(name),' sample program' end if ! ! get parameters ! call get_parms(ictxt,mtrx_file,rhs_file,filefmt,kmethd,ptype,& & part,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_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(ictxt) end if m_problem = aux_a%get_nrows() call psb_bcast(ictxt,m_problem) call psb_mat_renum(psb_mat_renum_identity_,aux_a,info,perm) ! At this point aux_b may still be unallocated if (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) call psb_gelp('N',perm(1:m_problem),& & b_col_glob(1:m_problem),info) 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) = done enddo endif else call psb_bcast(ictxt,m_problem) 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, ictxt,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,'(" ")') ! 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,info,fmt=afmt,v=ivg) case default if (iam == psb_root_) write(psb_out_unit,'("Partition type: block")') call psb_matdist(aux_a, a, ictxt,desc_a,info,fmt=afmt,parts=part_block) end select call psb_scatter(b_col_glob,b_col,desc_a,info,root=psb_root_) call psb_geall(x_col,desc_a,info) call x_col%zero() call psb_geasb(x_col,desc_a,info) call psb_geall(r_col,desc_a,info) call r_col%zero() 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,'(" ")') end if ! call prec%init(ictxt,ptype,info) ! building the preconditioner 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(ictxt,tprec) if(iam == psb_root_) then write(psb_out_unit,'("Preconditioner time: ",es12.5)')tprec write(psb_out_unit,'(" ")') end if cond = dzero 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,cond=cond) call psb_barrier(ictxt) t2 = psb_wtime() - t1 call psb_amx(ictxt,t2) call psb_geaxpby(done,b_col,dzero,r_col,desc_a,info) call psb_spmm(-done,a,x_col,done,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 prec%descr() 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 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,'("Condition number : ",es12.5)')cond 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,'("Storage format for A : ",a)')& & a%get_fmt() write(psb_out_unit,'("Storage format for DESC_A : ",a)')& & desc_a%get_fmt() end if call psb_gather(x_col_glob,x_col,desc_a,info,root=psb_root_) if (info == psb_success_) & & call psb_gather(r_col_glob,r_col,desc_a,info,root=psb_root_) if (info /= psb_success_) goto 9999 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 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 prec%free(info) call psb_cdfree(desc_a,info) call psb_exit(ictxt) stop 9999 call psb_error(ictxt) stop end program psb_df_sample