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294 lines
9.0 KiB
Fortran
294 lines
9.0 KiB
Fortran
!!$
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!!$ Parallel Sparse BLAS version 2.2
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!!$ (C) Copyright 2006/2007/2008
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!!$ Salvatore Filippone University of Rome Tor Vergata
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!!$ Alfredo Buttari University of Rome Tor Vergata
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!!$
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!!$ Redistribution and use in source and binary forms, with or without
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!!$ modification, are permitted provided that the following conditions
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!!$ are met:
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!!$ 1. Redistributions of source code must retain the above copyright
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!!$ notice, this list of conditions and the following disclaimer.
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!!$ 2. Redistributions in binary form must reproduce the above copyright
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!!$ notice, this list of conditions, and the following disclaimer in the
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!!$ documentation and/or other materials provided with the distribution.
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!!$ 3. The name of the PSBLAS group or the names of its contributors may
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!!$ not be used to endorse or promote products derived from this
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!!$ software without specific written permission.
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!!$
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!!$ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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!!$ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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!!$ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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!!$ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
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!!$ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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!!$ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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!!$ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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!!$ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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!!$ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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!!$ POSSIBILITY OF SUCH DAMAGE.
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!!$
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!!$
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program df_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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use getp
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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, 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(:,:), d(:)
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real(psb_dpk_), allocatable , save :: b_col(:), x_col(:), r_col(:), &
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& x_col_glob(:), r_col_glob(:)
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real(psb_dpk_), pointer :: b_col_glob(:)
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! communications data structure
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type(psb_desc_type):: desc_a
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integer :: ictxt, iam, np
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! solver paramters
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integer :: iter, itmax, ierr, itrace, ircode, ipart,&
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& methd, istopc, irst,amatsize,precsize,descsize
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real(psb_dpk_) :: err, eps,cond
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character(len=5) :: afmt
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character(len=20) :: name
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integer :: iparm(20)
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! other variables
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integer :: i,info,j,m_problem
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integer :: internal, m,ii,nnzero
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real(psb_dpk_) :: t1, t2, tprec, r_amax, b_amax,&
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&scale,resmx,resmxp
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integer :: nrhs, nrow, n_row, dim, nv, ne
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integer, allocatable :: ivg(:), ipv(:)
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call psb_init(ictxt)
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call psb_info(ictxt,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(ictxt)
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stop
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endif
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name='df_sample'
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if(psb_get_errstatus() /= 0) goto 9999
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info=0
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call psb_set_errverbosity(2)
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!
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! get parameters
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!
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call get_parms(ictxt,mtrx_file,rhs_file,kmethd,ptype,&
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& ipart,afmt,istopc,itmax,itrace,irst,eps)
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call psb_barrier(ictxt)
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t1 = psb_wtime()
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! read the input matrix to be processed and (possibly) the rhs
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nrhs = 1
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if (iam==psb_root_) then
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call read_mat(mtrx_file, aux_a, ictxt)
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m_problem = aux_a%m
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call psb_bcast(ictxt,m_problem)
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if(rhs_file /= 'NONE') then
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! reading an rhs
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call read_rhs(rhs_file,aux_b,info,ictxt)
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end if
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if (psb_size(aux_b,dim=1)==m_problem) then
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! if any rhs were present, broadcast the first one
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write(0,'("Ok, got an rhs ")')
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b_col_glob =>aux_b(:,1)
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else
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write(*,'("Generating an rhs...")')
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write(*,'(" ")')
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call psb_realloc(m_problem,1,aux_b,ircode)
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if (ircode /= 0) then
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call psb_errpush(4000,name)
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goto 9999
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endif
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b_col_glob => aux_b(:,1)
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do i=1, m_problem
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b_col_glob(i) = 1.d0
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enddo
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endif
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call psb_bcast(ictxt,b_col_glob(1:m_problem))
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else
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call psb_bcast(ictxt,m_problem)
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call psb_realloc(m_problem,1,aux_b,ircode)
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if (ircode /= 0) then
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call psb_errpush(4000,name)
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goto 9999
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endif
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b_col_glob =>aux_b(:,1)
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call psb_bcast(ictxt,b_col_glob(1:m_problem))
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end if
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! switch over different partition types
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if (ipart == 0) then
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call psb_barrier(ictxt)
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if (iam==psb_root_) write(*,'("Partition type: block")')
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allocate(ivg(m_problem),ipv(np))
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do i=1,m_problem
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call part_block(i,m_problem,np,ipv,nv)
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ivg(i) = ipv(1)
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enddo
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call psb_matdist(aux_a, a, ivg, ictxt, &
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& desc_a,b_col_glob,b_col,info,fmt=afmt)
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else if (ipart == 2) then
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if (iam==psb_root_) then
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write(*,'("Partition type: graph")')
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write(*,'(" ")')
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! write(0,'("Build type: graph")')
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call build_mtpart(aux_a%m,aux_a%fida,aux_a%ia1,aux_a%ia2,np)
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endif
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call psb_barrier(ictxt)
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call distr_mtpart(psb_root_,ictxt)
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call getv_mtpart(ivg)
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call psb_matdist(aux_a, a, ivg, ictxt, &
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& desc_a,b_col_glob,b_col,info,fmt=afmt)
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else
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if (iam==psb_root_) write(*,'("Partition type: block")')
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call psb_matdist(aux_a, a, part_block, ictxt, &
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& desc_a,b_col_glob,b_col,info,fmt=afmt)
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end if
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call psb_geall(x_col,desc_a,info)
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x_col(:) =0.0
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call psb_geasb(x_col,desc_a,info)
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call psb_geall(r_col,desc_a,info)
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r_col(:) =0.0
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call psb_geasb(r_col,desc_a,info)
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t2 = psb_wtime() - t1
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call psb_amx(ictxt, t2)
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if (iam==psb_root_) then
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write(*,'(" ")')
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write(*,'("Time to read and partition matrix : ",es10.4)')t2
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write(*,'(" ")')
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end if
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!
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call psb_precinit(prec,ptype,info)
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! building the preconditioner
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t1 = psb_wtime()
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call psb_precbld(a,desc_a,prec,info)
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tprec = psb_wtime()-t1
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if (info /= 0) then
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call psb_errpush(4010,name,a_err='psb_precbld')
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goto 9999
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end if
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call psb_amx(ictxt, tprec)
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if(iam==psb_root_) then
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write(*,'("Preconditioner time: ",es10.4)')tprec
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write(*,'(" ")')
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end if
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cond = dzero
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iparm = 0
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call psb_barrier(ictxt)
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t1 = psb_wtime()
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call psb_krylov(kmethd,a,prec,b_col,x_col,eps,desc_a,info,&
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& itmax=itmax,iter=iter,err=err,itrace=itrace,istop=istopc,&
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& irst=irst,cond=cond)
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call psb_barrier(ictxt)
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t2 = psb_wtime() - t1
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call psb_amx(ictxt,t2)
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call psb_geaxpby(done,b_col,dzero,r_col,desc_a,info)
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call psb_spmm(-done,a,x_col,done,r_col,desc_a,info)
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call psb_genrm2s(resmx,r_col,desc_a,info)
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call psb_geamaxs(resmxp,r_col,desc_a,info)
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amatsize = psb_sizeof(a)
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descsize = psb_sizeof(desc_a)
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precsize = psb_sizeof(prec)
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call psb_sum(ictxt,amatsize)
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call psb_sum(ictxt,descsize)
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call psb_sum(ictxt,precsize)
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if (iam==psb_root_) then
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call psb_precdescr(prec)
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write(*,'("Matrix: ",a)')mtrx_file
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write(*,'("Computed solution on ",i8," processors")')np
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write(*,'("Iterations to convergence: ",i6)')iter
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write(*,'("Error estimate on exit : ",es10.4)') err
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write(*,'("Time to buil prec. : ",es10.4)')tprec
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write(*,'("Time to solve matrix : ",es10.4)')t2
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write(*,'("Time per iteration : ",es10.4)')t2/(iter)
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write(*,'("Total time : ",es10.4)')t2+tprec
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write(*,'("Residual norm 2 : ",es10.4)')resmx
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write(*,'("Residual norm inf : ",es10.4)')resmxp
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write(*,*)"Condition number : ",cond
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write(*,'("Total memory occupation for A: ",i10)')amatsize
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write(*,'("Total memory occupation for DESC_A: ",i10)')descsize
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write(*,'("Total memory occupation for PREC: ",i10)')precsize
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end if
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allocate(x_col_glob(m_problem),r_col_glob(m_problem),stat=ierr)
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if (ierr /= 0) then
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write(0,*) 'allocation error: no data collection'
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else
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call psb_gather(x_col_glob,x_col,desc_a,info,root=psb_root_)
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call psb_gather(r_col_glob,r_col,desc_a,info,root=psb_root_)
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if (iam==psb_root_) then
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write(0,'(" ")')
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write(0,'("Saving x on file")')
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write(20,*) 'matrix: ',mtrx_file
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write(20,*) 'computed solution on ',np,' processors.'
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write(20,*) 'iterations to convergence: ',iter
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write(20,*) 'error estimate (infinity norm) on exit:', &
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& ' ||r||/(||a||||x||+||b||) = ',err
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write(20,*) 'max residual = ',resmx, resmxp
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write(20,'(a8,4(2x,a20))') 'I','X(I)','R(I)','B(I)'
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do i=1,m_problem
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write(20,998) i,x_col_glob(i),r_col_glob(i),b_col_glob(i)
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enddo
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end if
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end if
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998 format(i8,4(2x,g20.14))
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993 format(i6,4(1x,e12.6))
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call psb_gefree(b_col, desc_a,info)
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call psb_gefree(x_col, desc_a,info)
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call psb_spfree(a, desc_a,info)
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call psb_precfree(prec,info)
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call psb_cdfree(desc_a,info)
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9999 continue
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if(info /= 0) then
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call psb_error(ictxt)
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end if
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call psb_exit(ictxt)
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stop
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end program df_sample
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