!!$ !!$ Parallel Sparse BLAS v2.0 !!$ (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata !!$ Alfredo Buttari University of Rome Tor Vergata !!$ !!$ 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 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*40 :: cmethd, mtrx_file, rhs_file character*80 :: charbuf ! sparse matrices type(psb_dspmat_type) :: a, aux_a ! preconditioner data type(psb_dprec_type) :: pre integer :: igsmth, matop, novr ! dense matrices real(kind(1.d0)), allocatable, target :: aux_b(:,:), d(:) real(kind(1.d0)), allocatable , save :: b_col(:), x_col(:), r_col(:), & & x_col_glob(:), r_col_glob(:) real(kind(1.d0)), pointer :: b_col_glob(:) ! communications data structure type(psb_desc_type):: desc_a integer :: ictxt, iam, np logical :: amroot integer, parameter :: root=0 ! solver paramters integer :: iter, itmax, ierr, itrace, ircode, ipart,& & methd, istopc, iprec, ml real(kind(1.d0)) :: err, eps character(len=5) :: afmt character(len=20) :: name integer :: iparm(20) ! other variables integer :: i,info,j,m_problem integer :: internal, m,ii,nnzero real(kind(1.d0)) :: t1, t2, tprec, 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 amroot = (iam==root) name='df_sample' if(psb_get_errstatus().ne.0) goto 9999 info=0 call psb_set_errverbosity(2) call psb_set_erraction(0) ! ! get parameters ! call get_parms(ictxt,mtrx_file,rhs_file,cmethd,& & ipart,afmt,istopc,itmax,itrace,novr,iprec,eps) call psb_barrier(ictxt) t1 = psb_wtime() ! read the input matrix to be processed and (possibly) the rhs nrhs = 1 if (amroot) then call read_mat(mtrx_file, aux_a, ictxt) m_problem = aux_a%m call psb_bcast(ictxt,m_problem) if(rhs_file /= 'NONE') then ! reading an rhs call read_rhs(rhs_file,aux_b,ictxt) end if if (psb_size(aux_b,dim=1)==m_problem) then ! if any rhs were present, broadcast the first one write(0,'("Ok, got an rhs ")') b_col_glob =>aux_b(:,1) else write(*,'("Generating an rhs...")') write(*,'(" ")') call psb_realloc(m_problem,1,aux_b,ircode) if (ircode /= 0) then call psb_errpush(4000,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(4000,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.eq.0) then call psb_barrier(ictxt) if (amroot) write(*,'("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, ivg, ictxt, & & desc_a,b_col_glob,b_col,info,fmt=afmt) else if (ipart.eq.2) then if (amroot) then write(*,'("Partition type: graph")') write(*,'(" ")') ! write(0,'("Build type: graph")') call build_grppart(aux_a%m,aux_a%fida,aux_a%ia1,aux_a%ia2,np) endif call psb_barrier(ictxt) call distr_grppart(root,ictxt) call getv_grppart(ivg) call psb_matdist(aux_a, a, ivg, ictxt, & & desc_a,b_col_glob,b_col,info,fmt=afmt) else if (amroot) write(*,'("Partition type: block")') call psb_matdist(aux_a, a, part_block, ictxt, & & desc_a,b_col_glob,b_col,info,fmt=afmt) end if call psb_geall(x_col,desc_a,info) x_col(:) =0.0 call psb_geasb(x_col,desc_a,info) call psb_geall(r_col,desc_a,info) r_col(:) =0.0 call psb_geasb(r_col,desc_a,info) t2 = psb_wtime() - t1 call psb_amx(ictxt, t2) if (amroot) then write(*,'(" ")') write(*,'("Time to read and partition matrix : ",es10.4)')t2 write(*,'(" ")') end if ! ! prepare the preconditioning matrix. note the availability ! of optional parameters ! ! zero initial guess. matop=1 igsmth=-1 select case(iprec) case(noprec_) call psb_precset(pre,'noprec',info) case(diagsc_) call psb_precset(pre,'diagsc',info) case(bja_) call psb_precset(pre,'ilu',info) case default call psb_precset(pre,'ilu',info) end select ! building the preconditioner t1 = psb_wtime() call psb_precbld(a,desc_a,pre,info) tprec = psb_wtime()-t1 if (info /= 0) then call psb_errpush(4010,name,a_err='psb_precbld') goto 9999 end if call psb_amx(ictxt, tprec) if(amroot) then write(*,'("Preconditioner time: ",es10.4)')tprec write(*,'(" ")') end if iparm = 0 call psb_barrier(ictxt) t1 = psb_wtime() call psb_krylov(cmethd,a,pre,b_col,x_col,eps,desc_a,info,& & itmax=itmax,iter=iter,err=err,itrace=itrace,istop=istopc,irst=ml) 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) call psb_genrm2s(resmx,r_col,desc_a,info) call psb_geamaxs(resmxp,r_col,desc_a,info) if (amroot) then call psb_prec_descr(6,pre) write(*,'("Matrix: ",a)')mtrx_file write(*,'("Computed solution on ",i8," processors")')np write(*,'("Iterations to convergence: ",i6)')iter write(*,'("Error indicator on exit: ",f7.2)')err write(*,'("Time to buil prec. : ",es10.4)')tprec write(*,'("Time to solve matrix : ",es10.4)')t2 write(*,'("Time per iteration : ",es10.4)')t2/(iter) write(*,'("Total time : ",es10.4)')t2+tprec write(*,'("Residual norm 2 = ",es10.4)')resmx write(*,'("Residual norm inf = ",es10.4)')resmxp end if allocate(x_col_glob(m_problem),r_col_glob(m_problem),stat=ierr) if (ierr.ne.0) then write(0,*) 'allocation error: no data collection' else call psb_gather(x_col_glob,x_col,desc_a,info,iroot=0) call psb_gather(r_col_glob,r_col,desc_a,info,iroot=0) if (amroot) then write(0,'(" ")') write(0,'("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 indicator (infinity norm) on exit:', & & ' ||r||/(||a||||x||+||b||) = ',err write(20,*) 'max residual = ',resmx, resmxp 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 psb_precfree(pre,info) call psb_cdfree(desc_a,info) 9999 continue if(info /= 0) then call psb_error(ictxt) end if call psb_exit(ictxt) stop end program df_sample