psblas3:
test/pargen/ppde2d.f90 test/pargen/spde2d.f90 Added 2D test cases.psblas3-type-indexed
Salvatore Filippone
13 years ago
parent
06249c361f
commit
e391e1b00b
@ -0,0 +1,372 @@
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!!$
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!!$ Parallel Sparse BLAS version 2.3.1
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!!$ (C) Copyright 2006, 2007, 2008, 2009, 2010
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!!$ Salvatore Filippone University of Rome Tor Vergata
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!!$ Alfredo Buttari CNRS-IRIT, Toulouse
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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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! File: ppde2d.f90
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!
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! Program: ppde2d
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! This sample program solves a linear system obtained by discretizing a
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! PDE with Dirichlet BCs.
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!
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!
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! The PDE is a general second order equation in 2d
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!
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! a1 dd(u) a2 dd(u) b1 d(u) b2 d(u)
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! - ------ - ------ ----- + ------ + c u = f
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! dxdx dydy dx dy
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!
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! with Dirichlet boundary conditions
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! u = g
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!
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! on the unit square 0<=x,y<=1.
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!
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!
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! Note that if b1=b2=c=0., the PDE is the Laplace equation.
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!
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! In this sample program the index space of the discretized
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! computational domain is first numbered sequentially in a standard way,
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! then the corresponding vector is distributed according to a BLOCK
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! data distribution.
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!
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program ppde2d
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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=20) :: kmethd, ptype
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character(len=5) :: afmt
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integer(psb_ipk_) :: idim
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! miscellaneous
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real(psb_dpk_), parameter :: one = 1.d0
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real(psb_dpk_) :: t1, t2, tprec
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! sparse matrix and preconditioner
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type(psb_dspmat_type) :: a
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type(psb_dprec_type) :: prec
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! descriptor
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type(psb_desc_type) :: desc_a
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! dense vectors
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type(psb_d_vect_type) :: xxv,bv
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! parallel environment
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integer(psb_ipk_) :: ictxt, iam, np
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! solver parameters
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integer(psb_ipk_) :: iter, itmax,itrace, istopc, irst
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integer(psb_long_int_k_) :: amatsize, precsize, descsize, d2size
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real(psb_dpk_) :: err, eps
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! other variables
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integer(psb_ipk_) :: info, i
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character(len=20) :: name,ch_err
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character(len=40) :: fname
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info=psb_success_
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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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if(psb_get_errstatus() /= 0) goto 9999
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name='pde2d90'
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call psb_set_errverbosity(2)
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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(*,*) 'Welcome to PSBLAS version: ',psb_version_string_
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write(*,*) 'This is the ',trim(name),' sample program'
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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(ictxt,kmethd,ptype,afmt,idim,istopc,itmax,itrace,irst)
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!
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! allocate and fill in the coefficient matrix, rhs and initial guess
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!
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call psb_barrier(ictxt)
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t1 = psb_wtime()
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call psb_gen_pde2d(ictxt,idim,a,bv,xxv,desc_a,afmt,a1,a2,b1,b2,c,g,info)
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call psb_barrier(ictxt)
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t2 = psb_wtime() - t1
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if(info /= psb_success_) then
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info=psb_err_from_subroutine_
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ch_err='psb_gen_pde2d'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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if (iam == psb_root_) write(psb_out_unit,'("Overall matrix creation time : ",es12.5)')t2
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if (iam == psb_root_) write(psb_out_unit,'(" ")')
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!
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! prepare the preconditioner.
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!
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if(iam == psb_root_) write(psb_out_unit,'("Setting preconditioner to : ",a)')ptype
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call psb_precinit(prec,ptype,info)
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call psb_barrier(ictxt)
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t1 = psb_wtime()
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call psb_precbld(a,desc_a,prec,info)
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if(info /= psb_success_) then
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info=psb_err_from_subroutine_
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ch_err='psb_precbld'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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tprec = psb_wtime()-t1
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call psb_amx(ictxt,tprec)
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if (iam == psb_root_) write(psb_out_unit,'("Preconditioner time : ",es12.5)')tprec
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if (iam == psb_root_) write(psb_out_unit,'(" ")')
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!
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! iterative method parameters
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!
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if(iam == psb_root_) write(psb_out_unit,'("Calling iterative method ",a)')kmethd
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call psb_barrier(ictxt)
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t1 = psb_wtime()
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eps = 1.d-9
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call psb_krylov(kmethd,a,prec,bv,xxv,eps,desc_a,info,&
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& itmax=itmax,iter=iter,err=err,itrace=itrace,istop=istopc,irst=irst)
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if(info /= psb_success_) then
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info=psb_err_from_subroutine_
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ch_err='solver routine'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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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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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(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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write(psb_out_unit,'(" ")')
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write(psb_out_unit,'("Time to solve matrix : ",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,'("Number of iterations : ",i0)')iter
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write(psb_out_unit,'("Convergence indicator on exit : ",es12.5)')err
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write(psb_out_unit,'("Info on exit : ",i0)')info
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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,'("Storage type for DESC_A: ",a)') desc_a%indxmap%get_fmt()
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end if
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!
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! cleanup storage and exit
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!
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call psb_gefree(bv,desc_a,info)
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call psb_gefree(xxv,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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if(info /= psb_success_) then
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info=psb_err_from_subroutine_
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ch_err='free routine'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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9999 continue
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if(info /= psb_success_) 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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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(ictxt,kmethd,ptype,afmt,idim,istopc,itmax,itrace,irst)
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integer(psb_ipk_) :: ictxt
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character(len=*) :: kmethd, ptype, afmt
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integer(psb_ipk_) :: idim, istopc,itmax,itrace,irst
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integer(psb_ipk_) :: np, iam
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integer(psb_ipk_) :: intbuf(10), ip
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call psb_info(ictxt, iam, np)
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if (iam == 0) then
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read(psb_inp_unit,*) ip
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if (ip >= 3) then
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read(psb_inp_unit,*) kmethd
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read(psb_inp_unit,*) ptype
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read(psb_inp_unit,*) afmt
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! broadcast parameters to all processors
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call psb_bcast(ictxt,kmethd)
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call psb_bcast(ictxt,afmt)
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call psb_bcast(ictxt,ptype)
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read(psb_inp_unit,*) idim
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if (ip >= 4) then
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read(psb_inp_unit,*) istopc
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else
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istopc=1
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endif
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if (ip >= 5) then
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read(psb_inp_unit,*) itmax
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else
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itmax=500
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endif
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if (ip >= 6) then
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read(psb_inp_unit,*) itrace
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else
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itrace=-1
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endif
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if (ip >= 7) then
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read(psb_inp_unit,*) irst
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else
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irst=1
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endif
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! broadcast parameters to all processors
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intbuf(1) = idim
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intbuf(2) = istopc
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intbuf(3) = itmax
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intbuf(4) = itrace
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intbuf(5) = irst
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call psb_bcast(ictxt,intbuf(1:5))
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write(psb_out_unit,'("Solving matrix : ell1")')
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write(psb_out_unit,'("Grid dimensions : ",i5," x ",i5)')idim,idim
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write(psb_out_unit,'("Number of processors : ",i0)')np
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write(psb_out_unit,'("Data distribution : BLOCK")')
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write(psb_out_unit,'("Preconditioner : ",a)') ptype
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write(psb_out_unit,'("Iterative method : ",a)') kmethd
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write(psb_out_unit,'(" ")')
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else
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! wrong number of parameter, print an error message and exit
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call pr_usage(0)
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call psb_abort(ictxt)
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stop 1
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endif
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else
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call psb_bcast(ictxt,kmethd)
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call psb_bcast(ictxt,afmt)
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call psb_bcast(ictxt,ptype)
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call psb_bcast(ictxt,intbuf(1:5))
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idim = intbuf(1)
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istopc = intbuf(2)
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itmax = intbuf(3)
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itrace = intbuf(4)
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irst = intbuf(5)
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end if
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return
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end subroutine get_parms
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!
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! print an error message
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!
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subroutine pr_usage(iout)
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integer(psb_ipk_) :: iout
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write(iout,*)'incorrect parameter(s) found'
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write(iout,*)' usage: pde2d90 methd prec dim &
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&[istop itmax itrace]'
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write(iout,*)' where:'
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write(iout,*)' methd: cgstab cgs rgmres bicgstabl'
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write(iout,*)' prec : bjac diag none'
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write(iout,*)' dim number of points along each axis'
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write(iout,*)' the size of the resulting linear '
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write(iout,*)' system is dim**3'
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write(iout,*)' istop stopping criterion 1, 2 '
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write(iout,*)' itmax maximum number of iterations [500] '
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write(iout,*)' itrace <=0 (no tracing, default) or '
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write(iout,*)' >= 1 do tracing every itrace'
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write(iout,*)' iterations '
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end subroutine pr_usage
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!
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! functions parametrizing the differential equation
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!
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function b1(x,y)
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use psb_base_mod, only : psb_dpk_
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real(psb_dpk_) :: b1
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real(psb_dpk_), intent(in) :: x,y
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b1=1.d0/sqrt(2.d0)
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end function b1
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function b2(x,y)
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use psb_base_mod, only : psb_dpk_
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real(psb_dpk_) :: b2
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real(psb_dpk_), intent(in) :: x,y
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b2=1.d0/sqrt(2.d0)
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end function b2
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function c(x,y)
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use psb_base_mod, only : psb_dpk_
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real(psb_dpk_) :: c
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real(psb_dpk_), intent(in) :: x,y
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c=0.d0
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end function c
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function a1(x,y)
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use psb_base_mod, only : psb_dpk_
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real(psb_dpk_) :: a1
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real(psb_dpk_), intent(in) :: x,y
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a1=1.d0/80
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end function a1
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function a2(x,y)
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use psb_base_mod, only : psb_dpk_
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real(psb_dpk_) :: a2
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real(psb_dpk_), intent(in) :: x,y
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a2=1.d0/80
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end function a2
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function g(x,y)
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use psb_base_mod, only : psb_dpk_, done
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real(psb_dpk_) :: g
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real(psb_dpk_), intent(in) :: x,y
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g = dzero
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if (x == done) then
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g = done
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else if (x == dzero) then
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g = exp(-y**2)
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end if
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end function g
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end program ppde2d
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@ -0,0 +1,372 @@
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!!$
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!!$ Parallel Sparse BLAS version 2.3.1
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!!$ (C) Copyright 2006, 2007, 2008, 2009, 2010
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!!$ Salvatore Filippone University of Rome Tor Vergata
|
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!!$ Alfredo Buttari CNRS-IRIT, Toulouse
|
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!!$
|
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!!$ 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.
|
||||
!!$
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!!$
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! File: spde2d.f90
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!
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! Program: spde2d
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! This sample program solves a linear system obtained by discretizing a
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! PDE with Dirichlet BCs.
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!
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!
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! The PDE is a general second order equation in 2d
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!
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! a1 dd(u) a2 dd(u) b1 d(u) b2 d(u)
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! - ------ - ------ ----- + ------ + c u = f
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! dxdx dydy dx dy
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!
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! with Dirichlet boundary conditions
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! u = g
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!
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! on the unit square 0<=x,y<=1.
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!
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!
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! Note that if b1=b2=c=0., the PDE is the Laplace equation.
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!
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! In this sample program the index space of the discretized
|
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! computational domain is first numbered sequentially in a standard way,
|
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! then the corresponding vector is distributed according to a BLOCK
|
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! data distribution.
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!
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program spde2d
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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
|
||||
character(len=20) :: kmethd, ptype
|
||||
character(len=5) :: afmt
|
||||
integer(psb_ipk_) :: idim
|
||||
|
||||
! miscellaneous
|
||||
real(psb_spk_), parameter :: one = 1.e0
|
||||
real(psb_dpk_) :: t1, t2, tprec
|
||||
|
||||
! sparse matrix and preconditioner
|
||||
type(psb_sspmat_type) :: a
|
||||
type(psb_sprec_type) :: prec
|
||||
! descriptor
|
||||
type(psb_desc_type) :: desc_a
|
||||
! dense vectors
|
||||
type(psb_s_vect_type) :: xxv,bv
|
||||
! parallel environment
|
||||
integer(psb_ipk_) :: ictxt, iam, np
|
||||
|
||||
! solver parameters
|
||||
integer(psb_ipk_) :: iter, itmax,itrace, istopc, irst
|
||||
integer(psb_long_int_k_) :: amatsize, precsize, descsize, d2size
|
||||
real(psb_spk_) :: err, eps
|
||||
|
||||
! other variables
|
||||
integer(psb_ipk_) :: info, i
|
||||
character(len=20) :: name,ch_err
|
||||
character(len=40) :: fname
|
||||
|
||||
info=psb_success_
|
||||
|
||||
|
||||
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
|
||||
if(psb_get_errstatus() /= 0) goto 9999
|
||||
name='pde2d90'
|
||||
call psb_set_errverbosity(2)
|
||||
!
|
||||
! 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,kmethd,ptype,afmt,idim,istopc,itmax,itrace,irst)
|
||||
|
||||
!
|
||||
! allocate and fill in the coefficient matrix, rhs and initial guess
|
||||
!
|
||||
call psb_barrier(ictxt)
|
||||
t1 = psb_wtime()
|
||||
call psb_gen_pde2d(ictxt,idim,a,bv,xxv,desc_a,afmt,a1,a2,b1,b2,c,g,info)
|
||||
call psb_barrier(ictxt)
|
||||
t2 = psb_wtime() - t1
|
||||
if(info /= psb_success_) then
|
||||
info=psb_err_from_subroutine_
|
||||
ch_err='psb_gen_pde2d'
|
||||
call psb_errpush(info,name,a_err=ch_err)
|
||||
goto 9999
|
||||
end if
|
||||
if (iam == psb_root_) write(psb_out_unit,'("Overall matrix creation time : ",es12.5)')t2
|
||||
if (iam == psb_root_) write(psb_out_unit,'(" ")')
|
||||
!
|
||||
! prepare the preconditioner.
|
||||
!
|
||||
if(iam == psb_root_) write(psb_out_unit,'("Setting preconditioner to : ",a)')ptype
|
||||
call psb_precinit(prec,ptype,info)
|
||||
|
||||
call psb_barrier(ictxt)
|
||||
t1 = psb_wtime()
|
||||
call psb_precbld(a,desc_a,prec,info)
|
||||
if(info /= psb_success_) then
|
||||
info=psb_err_from_subroutine_
|
||||
ch_err='psb_precbld'
|
||||
call psb_errpush(info,name,a_err=ch_err)
|
||||
goto 9999
|
||||
end if
|
||||
|
||||
tprec = psb_wtime()-t1
|
||||
|
||||
call psb_amx(ictxt,tprec)
|
||||
|
||||
if (iam == psb_root_) write(psb_out_unit,'("Preconditioner time : ",es12.5)')tprec
|
||||
if (iam == psb_root_) write(psb_out_unit,'(" ")')
|
||||
!
|
||||
! iterative method parameters
|
||||
!
|
||||
if(iam == psb_root_) write(psb_out_unit,'("Calling iterative method ",a)')kmethd
|
||||
call psb_barrier(ictxt)
|
||||
t1 = psb_wtime()
|
||||
eps = 1.d-9
|
||||
call psb_krylov(kmethd,a,prec,bv,xxv,eps,desc_a,info,&
|
||||
& itmax=itmax,iter=iter,err=err,itrace=itrace,istop=istopc,irst=irst)
|
||||
|
||||
if(info /= psb_success_) then
|
||||
info=psb_err_from_subroutine_
|
||||
ch_err='solver routine'
|
||||
call psb_errpush(info,name,a_err=ch_err)
|
||||
goto 9999
|
||||
end if
|
||||
|
||||
call psb_barrier(ictxt)
|
||||
t2 = psb_wtime() - t1
|
||||
call psb_amx(ictxt,t2)
|
||||
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
|
||||
write(psb_out_unit,'(" ")')
|
||||
write(psb_out_unit,'("Time to solve matrix : ",es12.5)')t2
|
||||
write(psb_out_unit,'("Time per iteration : ",es12.5)')t2/iter
|
||||
write(psb_out_unit,'("Number of iterations : ",i0)')iter
|
||||
write(psb_out_unit,'("Convergence indicator on exit : ",es12.5)')err
|
||||
write(psb_out_unit,'("Info on exit : ",i0)')info
|
||||
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 type for DESC_A: ",a)') desc_a%indxmap%get_fmt()
|
||||
end if
|
||||
|
||||
|
||||
!
|
||||
! cleanup storage and exit
|
||||
!
|
||||
call psb_gefree(bv,desc_a,info)
|
||||
call psb_gefree(xxv,desc_a,info)
|
||||
call psb_spfree(a,desc_a,info)
|
||||
call psb_precfree(prec,info)
|
||||
call psb_cdfree(desc_a,info)
|
||||
if(info /= psb_success_) then
|
||||
info=psb_err_from_subroutine_
|
||||
ch_err='free routine'
|
||||
call psb_errpush(info,name,a_err=ch_err)
|
||||
goto 9999
|
||||
end if
|
||||
|
||||
9999 continue
|
||||
if(info /= psb_success_) then
|
||||
call psb_error(ictxt)
|
||||
end if
|
||||
call psb_exit(ictxt)
|
||||
stop
|
||||
|
||||
contains
|
||||
!
|
||||
! get iteration parameters from standard input
|
||||
!
|
||||
subroutine get_parms(ictxt,kmethd,ptype,afmt,idim,istopc,itmax,itrace,irst)
|
||||
integer(psb_ipk_) :: ictxt
|
||||
character(len=*) :: kmethd, ptype, afmt
|
||||
integer(psb_ipk_) :: idim, istopc,itmax,itrace,irst
|
||||
integer(psb_ipk_) :: np, iam
|
||||
integer(psb_ipk_) :: intbuf(10), ip
|
||||
|
||||
call psb_info(ictxt, iam, np)
|
||||
|
||||
if (iam == 0) then
|
||||
read(psb_inp_unit,*) ip
|
||||
if (ip >= 3) then
|
||||
read(psb_inp_unit,*) kmethd
|
||||
read(psb_inp_unit,*) ptype
|
||||
read(psb_inp_unit,*) afmt
|
||||
|
||||
! broadcast parameters to all processors
|
||||
call psb_bcast(ictxt,kmethd)
|
||||
call psb_bcast(ictxt,afmt)
|
||||
call psb_bcast(ictxt,ptype)
|
||||
|
||||
|
||||
read(psb_inp_unit,*) idim
|
||||
if (ip >= 4) then
|
||||
read(psb_inp_unit,*) istopc
|
||||
else
|
||||
istopc=1
|
||||
endif
|
||||
if (ip >= 5) then
|
||||
read(psb_inp_unit,*) itmax
|
||||
else
|
||||
itmax=500
|
||||
endif
|
||||
if (ip >= 6) then
|
||||
read(psb_inp_unit,*) itrace
|
||||
else
|
||||
itrace=-1
|
||||
endif
|
||||
if (ip >= 7) then
|
||||
read(psb_inp_unit,*) irst
|
||||
else
|
||||
irst=1
|
||||
endif
|
||||
! broadcast parameters to all processors
|
||||
|
||||
intbuf(1) = idim
|
||||
intbuf(2) = istopc
|
||||
intbuf(3) = itmax
|
||||
intbuf(4) = itrace
|
||||
intbuf(5) = irst
|
||||
call psb_bcast(ictxt,intbuf(1:5))
|
||||
|
||||
write(psb_out_unit,'("Solving matrix : ell1")')
|
||||
write(psb_out_unit,'("Grid dimensions : ",i5," x ",i5)')idim,idim
|
||||
write(psb_out_unit,'("Number of processors : ",i0)')np
|
||||
write(psb_out_unit,'("Data distribution : BLOCK")')
|
||||
write(psb_out_unit,'("Preconditioner : ",a)') ptype
|
||||
write(psb_out_unit,'("Iterative method : ",a)') kmethd
|
||||
write(psb_out_unit,'(" ")')
|
||||
else
|
||||
! wrong number of parameter, print an error message and exit
|
||||
call pr_usage(0)
|
||||
call psb_abort(ictxt)
|
||||
stop 1
|
||||
endif
|
||||
else
|
||||
call psb_bcast(ictxt,kmethd)
|
||||
call psb_bcast(ictxt,afmt)
|
||||
call psb_bcast(ictxt,ptype)
|
||||
call psb_bcast(ictxt,intbuf(1:5))
|
||||
idim = intbuf(1)
|
||||
istopc = intbuf(2)
|
||||
itmax = intbuf(3)
|
||||
itrace = intbuf(4)
|
||||
irst = intbuf(5)
|
||||
end if
|
||||
return
|
||||
|
||||
end subroutine get_parms
|
||||
!
|
||||
! print an error message
|
||||
!
|
||||
subroutine pr_usage(iout)
|
||||
integer(psb_ipk_) :: iout
|
||||
write(iout,*)'incorrect parameter(s) found'
|
||||
write(iout,*)' usage: pde2d90 methd prec dim &
|
||||
&[istop itmax itrace]'
|
||||
write(iout,*)' where:'
|
||||
write(iout,*)' methd: cgstab cgs rgmres bicgstabl'
|
||||
write(iout,*)' prec : bjac diag none'
|
||||
write(iout,*)' dim number of points along each axis'
|
||||
write(iout,*)' the size of the resulting linear '
|
||||
write(iout,*)' system is dim**3'
|
||||
write(iout,*)' istop stopping criterion 1, 2 '
|
||||
write(iout,*)' itmax maximum number of iterations [500] '
|
||||
write(iout,*)' itrace <=0 (no tracing, default) or '
|
||||
write(iout,*)' >= 1 do tracing every itrace'
|
||||
write(iout,*)' iterations '
|
||||
end subroutine pr_usage
|
||||
|
||||
!
|
||||
! functions parametrizing the differential equation
|
||||
!
|
||||
function b1(x,y)
|
||||
use psb_base_mod, only : psb_spk_
|
||||
real(psb_spk_) :: b1
|
||||
real(psb_spk_), intent(in) :: x,y
|
||||
b1=1.e0/sqrt(2.e0)
|
||||
end function b1
|
||||
function b2(x,y)
|
||||
use psb_base_mod, only : psb_spk_
|
||||
real(psb_spk_) :: b2
|
||||
real(psb_spk_), intent(in) :: x,y
|
||||
b2=1.e0/sqrt(2.e0)
|
||||
end function b2
|
||||
function c(x,y)
|
||||
use psb_base_mod, only : psb_spk_
|
||||
real(psb_spk_) :: c
|
||||
real(psb_spk_), intent(in) :: x,y
|
||||
c=0.e0
|
||||
end function c
|
||||
function a1(x,y)
|
||||
use psb_base_mod, only : psb_spk_
|
||||
real(psb_spk_) :: a1
|
||||
real(psb_spk_), intent(in) :: x,y
|
||||
a1=1.e0/80
|
||||
end function a1
|
||||
function a2(x,y)
|
||||
use psb_base_mod, only : psb_spk_
|
||||
real(psb_spk_) :: a2
|
||||
real(psb_spk_), intent(in) :: x,y
|
||||
a2=1.e0/80
|
||||
end function a2
|
||||
function g(x,y)
|
||||
use psb_base_mod, only : psb_spk_, sone
|
||||
real(psb_spk_) :: g
|
||||
real(psb_spk_), intent(in) :: x,y
|
||||
g = szero
|
||||
if (x == sone) then
|
||||
g = sone
|
||||
else if (x == szero) then
|
||||
g = exp(-y**2)
|
||||
end if
|
||||
end function g
|
||||
|
||||
end program spde2d
|
||||
|
||||
|
||||
Loading…
Reference in New Issue