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1074 lines
35 KiB
Fortran
1074 lines
35 KiB
Fortran
6 months ago
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!
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! Parallel Sparse BLAS version 3.5
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! (C) Copyright 2006-2018
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! Salvatore Filippone
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! Alfredo Buttari
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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: psb_d_pde3d.f90
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!
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! Program: psb_d_pde3d
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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 3d
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!
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! a1 dd(u) a2 dd(u) a3 dd(u) b1 d(u) b2 d(u) b3 d(u)
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! - ------ - ------ - ------ + ----- + ------ + ------ + c u = f
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! dxdx dydy dzdz dx dy dz
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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 cube 0<=x,y,z<=1.
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!
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!
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! Note that if b1=b2=b3=c=0., the PDE is the Laplace equation.
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!
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! There are three choices available for data distribution:
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! 1. A simple BLOCK distribution
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! 2. A ditribution based on arbitrary assignment of indices to processes,
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! typically from a graph partitioner
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! 3. A 3D distribution in which the unit cube is partitioned
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! into subcubes, each one assigned to a process.
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!
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!
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module psb_d_pde3d_mod
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use psb_base_mod, only : psb_dpk_, psb_ipk_, psb_lpk_, psb_desc_type,&
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& psb_dspmat_type, psb_d_vect_type, dzero,&
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& psb_d_base_sparse_mat, psb_d_base_vect_type, &
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& psb_i_base_vect_type, psb_l_base_vect_type
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interface
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function d_func_3d(x,y,z) result(val)
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import :: psb_dpk_
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real(psb_dpk_), intent(in) :: x,y,z
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real(psb_dpk_) :: val
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end function d_func_3d
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end interface
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interface psb_gen_pde3d
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module procedure psb_d_gen_pde3d
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end interface psb_gen_pde3d
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contains
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function d_null_func_3d(x,y,z) result(val)
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real(psb_dpk_), intent(in) :: x,y,z
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real(psb_dpk_) :: val
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val = dzero
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end function d_null_func_3d
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!
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! functions parametrizing the differential equation
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!
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!
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! Note: b1, b2 and b3 are the coefficients of the first
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! derivative of the unknown function. The default
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! we apply here is to have them zero, so that the resulting
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! matrix is symmetric/hermitian and suitable for
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! testing with CG and FCG.
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! When testing methods for non-hermitian matrices you can
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! change the B1/B2/B3 functions to e.g. done/sqrt((3*done))
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!
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function b1(x,y,z)
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use psb_base_mod, only : psb_dpk_, done, dzero
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implicit none
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real(psb_dpk_) :: b1
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real(psb_dpk_), intent(in) :: x,y,z
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b1=dzero
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end function b1
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function b2(x,y,z)
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use psb_base_mod, only : psb_dpk_, done, dzero
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implicit none
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real(psb_dpk_) :: b2
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real(psb_dpk_), intent(in) :: x,y,z
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b2=dzero
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end function b2
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function b3(x,y,z)
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use psb_base_mod, only : psb_dpk_, done, dzero
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implicit none
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real(psb_dpk_) :: b3
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real(psb_dpk_), intent(in) :: x,y,z
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b3=dzero
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end function b3
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function c(x,y,z)
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use psb_base_mod, only : psb_dpk_, done, dzero
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implicit none
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real(psb_dpk_) :: c
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real(psb_dpk_), intent(in) :: x,y,z
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c=dzero
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end function c
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function a1(x,y,z)
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use psb_base_mod, only : psb_dpk_, done, dzero
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implicit none
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real(psb_dpk_) :: a1
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real(psb_dpk_), intent(in) :: x,y,z
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a1=done/80
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end function a1
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function a2(x,y,z)
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use psb_base_mod, only : psb_dpk_, done, dzero
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implicit none
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real(psb_dpk_) :: a2
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real(psb_dpk_), intent(in) :: x,y,z
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a2=done/80
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end function a2
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function a3(x,y,z)
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use psb_base_mod, only : psb_dpk_, done, dzero
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implicit none
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real(psb_dpk_) :: a3
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real(psb_dpk_), intent(in) :: x,y,z
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a3=done/80
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end function a3
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function g(x,y,z)
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use psb_base_mod, only : psb_dpk_, done, dzero
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implicit none
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real(psb_dpk_) :: g
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real(psb_dpk_), intent(in) :: x,y,z
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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-z**2)
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end if
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end function g
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!
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! subroutine to allocate and fill in the coefficient matrix and
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! the rhs.
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!
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subroutine psb_d_gen_pde3d(ctxt,idim,a,bv,xv,desc_a,afmt,info,&
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& f,amold,vmold,imold,partition,nrl,iv)
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use psb_base_mod
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use psb_util_mod
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#if defined(OPENMP)
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use omp_lib
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#endif
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!
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! Discretizes the partial differential equation
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!
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! a1 dd(u) a2 dd(u) a3 dd(u) b1 d(u) b2 d(u) b3 d(u)
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! - ------ - ------ - ------ + ----- + ------ + ------ + c u = f
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! dxdx dydy dzdz dx dy dz
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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 cube 0<=x,y,z<=1.
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!
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!
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! Note that if b1=b2=b3=c=0., the PDE is the Laplace equation.
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!
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implicit none
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integer(psb_ipk_) :: idim
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type(psb_dspmat_type) :: a
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type(psb_d_vect_type) :: xv,bv
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type(psb_desc_type) :: desc_a
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type(psb_ctxt_type) :: ctxt
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integer(psb_ipk_) :: info
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character(len=*) :: afmt
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procedure(d_func_3d), optional :: f
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class(psb_d_base_sparse_mat), optional :: amold
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class(psb_d_base_vect_type), optional :: vmold
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class(psb_i_base_vect_type), optional :: imold
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integer(psb_ipk_), optional :: partition, nrl,iv(:)
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! Local variables.
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integer(psb_ipk_), parameter :: nb=20
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type(psb_d_csc_sparse_mat) :: acsc
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type(psb_d_coo_sparse_mat) :: acoo
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type(psb_d_csr_sparse_mat) :: acsr
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real(psb_dpk_) :: zt(nb),x,y,z
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integer(psb_ipk_) :: nnz,nr,nlr,i,j,ii,ib,k, partition_, mysz
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integer(psb_lpk_) :: m,n,glob_row,nt
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integer(psb_ipk_) :: ix,iy,iz,ia,indx_owner
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! For 3D partition
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! Note: integer control variables going directly into an MPI call
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! must be 4 bytes, i.e. psb_mpk_
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integer(psb_mpk_) :: npdims(3), npp, minfo
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integer(psb_ipk_) :: npx,npy,npz, iamx,iamy,iamz,mynx,myny,mynz
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integer(psb_ipk_), allocatable :: bndx(:),bndy(:),bndz(:)
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! Process grid
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integer(psb_ipk_) :: np, iam
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integer(psb_ipk_) :: icoeff
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integer(psb_lpk_), allocatable :: myidx(:)
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! deltah dimension of each grid cell
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! deltat discretization time
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real(psb_dpk_) :: deltah, sqdeltah, deltah2
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real(psb_dpk_), parameter :: rhs=dzero,one=done,zero=dzero
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real(psb_dpk_) :: t0, t1, t2, t3, tasb, talc, ttot, tgen, tcdasb
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integer(psb_ipk_) :: err_act
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procedure(d_func_3d), pointer :: f_
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character(len=20) :: name, ch_err,tmpfmt
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info = psb_success_
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name = 'create_matrix'
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call psb_erractionsave(err_act)
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call psb_info(ctxt, iam, np)
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if (present(f)) then
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f_ => f
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else
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f_ => d_null_func_3d
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end if
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deltah = done/(idim+1)
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sqdeltah = deltah*deltah
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deltah2 = (2*done)* deltah
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if (present(partition)) then
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if ((1<= partition).and.(partition <= 3)) then
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partition_ = partition
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else
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write(*,*) 'Invalid partition choice ',partition,' defaulting to 3'
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partition_ = 3
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end if
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else
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partition_ = 3
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end if
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! initialize array descriptor and sparse matrix storage. provide an
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! estimate of the number of non zeroes
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m = (1_psb_lpk_*idim)*idim*idim
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n = m
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nnz = ((n*7)/(np))
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if(iam == psb_root_) write(psb_out_unit,'("Generating Matrix (size=",i0,")...")')n
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t0 = psb_wtime()
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select case(partition_)
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case(1)
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! A BLOCK partition
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if (present(nrl)) then
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nr = nrl
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else
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!
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! Using a simple BLOCK distribution.
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!
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nt = (m+np-1)/np
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nr = max(0,min(nt,m-(iam*nt)))
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end if
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nt = nr
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call psb_sum(ctxt,nt)
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if (nt /= m) then
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write(psb_err_unit,*) iam, 'Initialization error ',nr,nt,m
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info = -1
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call psb_barrier(ctxt)
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call psb_abort(ctxt)
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return
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end if
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!
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! First example of use of CDALL: specify for each process a number of
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! contiguous rows
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!
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call psb_cdall(ctxt,desc_a,info,nl=nr)
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myidx = desc_a%get_global_indices()
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nlr = size(myidx)
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case(2)
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! A partition defined by the user through IV
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if (present(iv)) then
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if (size(iv) /= m) then
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write(psb_err_unit,*) iam, 'Initialization error: wrong IV size',size(iv),m
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info = -1
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call psb_barrier(ctxt)
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call psb_abort(ctxt)
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return
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end if
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else
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write(psb_err_unit,*) iam, 'Initialization error: IV not present'
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info = -1
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call psb_barrier(ctxt)
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call psb_abort(ctxt)
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return
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end if
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!
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! Second example of use of CDALL: specify for each row the
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! process that owns it
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!
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call psb_cdall(ctxt,desc_a,info,vg=iv)
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myidx = desc_a%get_global_indices()
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nlr = size(myidx)
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case(3)
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! A 3-dimensional partition
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! A nifty MPI function will split the process list
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npdims = 0
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#if defined(SERIAL_MPI)
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npdims = 1
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#else
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call mpi_dims_create(np,3,npdims,info)
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#endif
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npx = npdims(1)
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npy = npdims(2)
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npz = npdims(3)
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allocate(bndx(0:npx),bndy(0:npy),bndz(0:npz))
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! We can reuse idx2ijk for process indices as well.
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call idx2ijk(iamx,iamy,iamz,iam,npx,npy,npz,base=0)
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|
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! Now let's split the 3D cube in hexahedra
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||
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call dist1Didx(bndx,idim,npx)
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mynx = bndx(iamx+1)-bndx(iamx)
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||
|
|
call dist1Didx(bndy,idim,npy)
|
||
|
|
myny = bndy(iamy+1)-bndy(iamy)
|
||
|
|
call dist1Didx(bndz,idim,npz)
|
||
|
|
mynz = bndz(iamz+1)-bndz(iamz)
|
||
|
|
|
||
|
|
! How many indices do I own?
|
||
|
|
nlr = mynx*myny*mynz
|
||
|
|
allocate(myidx(nlr))
|
||
|
|
! Now, let's generate the list of indices I own
|
||
|
|
nr = 0
|
||
|
|
do i=bndx(iamx),bndx(iamx+1)-1
|
||
|
|
do j=bndy(iamy),bndy(iamy+1)-1
|
||
|
|
do k=bndz(iamz),bndz(iamz+1)-1
|
||
|
|
nr = nr + 1
|
||
|
|
call ijk2idx(myidx(nr),i,j,k,idim,idim,idim)
|
||
|
|
end do
|
||
|
|
end do
|
||
|
|
end do
|
||
|
|
if (nr /= nlr) then
|
||
|
|
write(psb_err_unit,*) iam,iamx,iamy,iamz, 'Initialization error: NR vs NLR ',&
|
||
|
|
& nr,nlr,mynx,myny,mynz
|
||
|
|
info = -1
|
||
|
|
call psb_barrier(ctxt)
|
||
|
|
call psb_abort(ctxt)
|
||
|
|
end if
|
||
|
|
|
||
|
|
!
|
||
|
|
! Third example of use of CDALL: specify for each process
|
||
|
|
! the set of global indices it owns.
|
||
|
|
!
|
||
|
|
call psb_cdall(ctxt,desc_a,info,vl=myidx)
|
||
|
|
|
||
|
|
!
|
||
|
|
! Specify process topology
|
||
|
|
!
|
||
|
|
block
|
||
|
|
!
|
||
|
|
! Use adjcncy methods
|
||
|
|
!
|
||
|
|
integer(psb_mpk_), allocatable :: neighbours(:)
|
||
|
|
integer(psb_mpk_) :: cnt
|
||
|
|
logical, parameter :: debug_adj=.true.
|
||
|
|
if (debug_adj.and.(np > 1)) then
|
||
|
|
cnt = 0
|
||
|
|
allocate(neighbours(np))
|
||
|
|
if (iamx < npx-1) then
|
||
|
|
cnt = cnt + 1
|
||
|
|
call ijk2idx(neighbours(cnt),iamx+1,iamy,iamz,npx,npy,npz,base=0)
|
||
|
|
end if
|
||
|
|
if (iamy < npy-1) then
|
||
|
|
cnt = cnt + 1
|
||
|
|
call ijk2idx(neighbours(cnt),iamx,iamy+1,iamz,npx,npy,npz,base=0)
|
||
|
|
end if
|
||
|
|
if (iamz < npz-1) then
|
||
|
|
cnt = cnt + 1
|
||
|
|
call ijk2idx(neighbours(cnt),iamx,iamy,iamz+1,npx,npy,npz,base=0)
|
||
|
|
end if
|
||
|
|
if (iamx >0) then
|
||
|
|
cnt = cnt + 1
|
||
|
|
call ijk2idx(neighbours(cnt),iamx-1,iamy,iamz,npx,npy,npz,base=0)
|
||
|
|
end if
|
||
|
|
if (iamy >0) then
|
||
|
|
cnt = cnt + 1
|
||
|
|
call ijk2idx(neighbours(cnt),iamx,iamy-1,iamz,npx,npy,npz,base=0)
|
||
|
|
end if
|
||
|
|
if (iamz >0) then
|
||
|
|
cnt = cnt + 1
|
||
|
|
call ijk2idx(neighbours(cnt),iamx,iamy,iamz-1,npx,npy,npz,base=0)
|
||
|
|
end if
|
||
|
|
call psb_realloc(cnt, neighbours,info)
|
||
|
|
call desc_a%set_p_adjcncy(neighbours)
|
||
|
|
!write(0,*) iam,' Check on neighbours: ',desc_a%get_p_adjcncy()
|
||
|
|
end if
|
||
|
|
end block
|
||
|
|
|
||
|
|
case default
|
||
|
|
write(psb_err_unit,*) iam, 'Initialization error: should not get here'
|
||
|
|
info = -1
|
||
|
|
call psb_barrier(ctxt)
|
||
|
|
call psb_abort(ctxt)
|
||
|
|
return
|
||
|
|
end select
|
||
|
|
|
||
|
|
|
||
|
|
if (info == psb_success_) call psb_spall(a,desc_a,info,nnz=nnz, &
|
||
|
|
& bldmode=psb_matbld_remote_,dupl=psb_dupl_add_)
|
||
|
|
! define rhs from boundary conditions; also build initial guess
|
||
|
|
if (info == psb_success_) call psb_geall(xv,desc_a,info)
|
||
|
|
if (info == psb_success_) call psb_geall(bv,desc_a,info,&
|
||
|
|
& bldmode=psb_matbld_remote_,dupl=psb_dupl_add_)
|
||
|
|
|
||
|
|
call psb_barrier(ctxt)
|
||
|
|
talc = psb_wtime()-t0
|
||
|
|
|
||
|
|
if (info /= psb_success_) then
|
||
|
|
info=psb_err_from_subroutine_
|
||
|
|
ch_err='allocation rout.'
|
||
|
|
call psb_errpush(info,name,a_err=ch_err)
|
||
|
|
goto 9999
|
||
|
|
end if
|
||
|
|
|
||
|
|
call psb_barrier(ctxt)
|
||
|
|
t1 = psb_wtime()
|
||
|
|
!$omp parallel shared(deltah,myidx,a,desc_a)
|
||
|
|
!
|
||
|
|
block
|
||
|
|
integer(psb_ipk_) :: i,j,k,ii,ib,icoeff, ix,iy,iz, ith,nth
|
||
|
|
integer(psb_lpk_) :: glob_row
|
||
|
|
integer(psb_lpk_), allocatable :: irow(:),icol(:)
|
||
|
|
real(psb_dpk_), allocatable :: val(:)
|
||
|
|
real(psb_dpk_) :: x,y,z, zt(nb)
|
||
|
|
#if defined(OPENMP)
|
||
|
|
nth = omp_get_num_threads()
|
||
|
|
ith = omp_get_thread_num()
|
||
|
|
#else
|
||
|
|
nth = 1
|
||
|
|
ith = 0
|
||
|
|
#endif
|
||
|
|
allocate(val(20*nb),irow(20*nb),&
|
||
|
|
&icol(20*nb),stat=info)
|
||
|
|
if (info /= psb_success_ ) then
|
||
|
|
info=psb_err_alloc_dealloc_
|
||
|
|
call psb_errpush(info,name)
|
||
|
|
!goto 9999
|
||
|
|
endif
|
||
|
|
|
||
|
|
!$omp do schedule(dynamic)
|
||
|
|
!
|
||
|
|
do ii=1, nlr, nb
|
||
|
|
if(info /= psb_success_) cycle
|
||
|
|
ib = min(nb,nlr-ii+1)
|
||
|
|
!ib = min(nb,mysz-ii+1)
|
||
|
|
icoeff = 1
|
||
|
|
do k=1,ib
|
||
|
|
i=ii+k-1
|
||
|
|
! local matrix pointer
|
||
|
|
glob_row=myidx(i)
|
||
|
|
! compute gridpoint coordinates
|
||
|
|
call idx2ijk(ix,iy,iz,glob_row,idim,idim,idim)
|
||
|
|
! x, y, z coordinates
|
||
|
|
x = (ix-1)*deltah
|
||
|
|
y = (iy-1)*deltah
|
||
|
|
z = (iz-1)*deltah
|
||
|
|
zt(k) = f_(x,y,z)
|
||
|
|
! internal point: build discretization
|
||
|
|
!
|
||
|
|
! term depending on (x-1,y,z)
|
||
|
|
!
|
||
|
|
val(icoeff) = -a1(x,y,z)/sqdeltah-b1(x,y,z)/deltah2
|
||
|
|
if (ix == 1) then
|
||
|
|
zt(k) = g(dzero,y,z)*(-val(icoeff)) + zt(k)
|
||
|
|
else
|
||
|
|
call ijk2idx(icol(icoeff),ix-1,iy,iz,idim,idim,idim)
|
||
|
|
irow(icoeff) = glob_row
|
||
|
|
icoeff = icoeff+1
|
||
|
|
endif
|
||
|
|
! term depending on (x,y-1,z)
|
||
|
|
val(icoeff) = -a2(x,y,z)/sqdeltah-b2(x,y,z)/deltah2
|
||
|
|
if (iy == 1) then
|
||
|
|
zt(k) = g(x,dzero,z)*(-val(icoeff)) + zt(k)
|
||
|
|
else
|
||
|
|
call ijk2idx(icol(icoeff),ix,iy-1,iz,idim,idim,idim)
|
||
|
|
irow(icoeff) = glob_row
|
||
|
|
icoeff = icoeff+1
|
||
|
|
endif
|
||
|
|
! term depending on (x,y,z-1)
|
||
|
|
val(icoeff)=-a3(x,y,z)/sqdeltah-b3(x,y,z)/deltah2
|
||
|
|
if (iz == 1) then
|
||
|
|
zt(k) = g(x,y,dzero)*(-val(icoeff)) + zt(k)
|
||
|
|
else
|
||
|
|
call ijk2idx(icol(icoeff),ix,iy,iz-1,idim,idim,idim)
|
||
|
|
irow(icoeff) = glob_row
|
||
|
|
icoeff = icoeff+1
|
||
|
|
endif
|
||
|
|
|
||
|
|
! term depending on (x,y,z)
|
||
|
|
val(icoeff)=(2*done)*(a1(x,y,z)+a2(x,y,z)+a3(x,y,z))/sqdeltah &
|
||
|
|
& + c(x,y,z)
|
||
|
|
call ijk2idx(icol(icoeff),ix,iy,iz,idim,idim,idim)
|
||
|
|
irow(icoeff) = glob_row
|
||
|
|
icoeff = icoeff+1
|
||
|
|
! term depending on (x,y,z+1)
|
||
|
|
val(icoeff)=-a3(x,y,z)/sqdeltah+b3(x,y,z)/deltah2
|
||
|
|
if (iz == idim) then
|
||
|
|
zt(k) = g(x,y,done)*(-val(icoeff)) + zt(k)
|
||
|
|
else
|
||
|
|
call ijk2idx(icol(icoeff),ix,iy,iz+1,idim,idim,idim)
|
||
|
|
irow(icoeff) = glob_row
|
||
|
|
icoeff = icoeff+1
|
||
|
|
endif
|
||
|
|
! term depending on (x,y+1,z)
|
||
|
|
val(icoeff)=-a2(x,y,z)/sqdeltah+b2(x,y,z)/deltah2
|
||
|
|
if (iy == idim) then
|
||
|
|
zt(k) = g(x,done,z)*(-val(icoeff)) + zt(k)
|
||
|
|
else
|
||
|
|
call ijk2idx(icol(icoeff),ix,iy+1,iz,idim,idim,idim)
|
||
|
|
irow(icoeff) = glob_row
|
||
|
|
icoeff = icoeff+1
|
||
|
|
endif
|
||
|
|
! term depending on (x+1,y,z)
|
||
|
|
val(icoeff)=-a1(x,y,z)/sqdeltah+b1(x,y,z)/deltah2
|
||
|
|
if (ix==idim) then
|
||
|
|
zt(k) = g(done,y,z)*(-val(icoeff)) + zt(k)
|
||
|
|
else
|
||
|
|
call ijk2idx(icol(icoeff),ix+1,iy,iz,idim,idim,idim)
|
||
|
|
irow(icoeff) = glob_row
|
||
|
|
icoeff = icoeff+1
|
||
|
|
endif
|
||
|
|
|
||
|
|
end do
|
||
|
|
#if defined(OPENMP)
|
||
|
|
!!$ write(0,*) omp_get_thread_num(),' Check insertion ',&
|
||
|
|
!!$ & irow(1:icoeff-1),':',icol(1:icoeff-1)
|
||
|
|
#endif
|
||
|
|
call psb_spins(icoeff-1,irow,icol,val,a,desc_a,info)
|
||
|
|
if(info /= psb_success_) cycle
|
||
|
|
call psb_geins(ib,myidx(ii:ii+ib-1),zt(1:ib),bv,desc_a,info)
|
||
|
|
if(info /= psb_success_) cycle
|
||
|
|
zt(:)=dzero
|
||
|
|
call psb_geins(ib,myidx(ii:ii+ib-1),zt(1:ib),xv,desc_a,info)
|
||
|
|
if(info /= psb_success_) cycle
|
||
|
|
end do
|
||
|
|
!$omp end do
|
||
|
|
deallocate(val,irow,icol)
|
||
|
|
end block
|
||
|
|
!$omp end parallel
|
||
|
|
|
||
|
|
tgen = psb_wtime()-t1
|
||
|
|
if(info /= psb_success_) then
|
||
|
|
info=psb_err_from_subroutine_
|
||
|
|
ch_err='insert rout.'
|
||
|
|
call psb_errpush(info,name,a_err=ch_err)
|
||
|
|
goto 9999
|
||
|
|
end if
|
||
|
|
|
||
|
|
|
||
|
|
call psb_barrier(ctxt)
|
||
|
|
t1 = psb_wtime()
|
||
|
|
call psb_cdasb(desc_a,info,mold=imold)
|
||
|
|
tcdasb = psb_wtime()-t1
|
||
|
|
|
||
|
|
call psb_barrier(ctxt)
|
||
|
|
t1 = psb_wtime()
|
||
|
|
if (info == psb_success_) then
|
||
|
|
if (present(amold)) then
|
||
|
|
call psb_spasb(a,desc_a,info,mold=amold)
|
||
|
|
else
|
||
|
|
call psb_spasb(a,desc_a,info,afmt=afmt)
|
||
|
|
end if
|
||
|
|
end if
|
||
|
|
call psb_barrier(ctxt)
|
||
|
|
if(info /= psb_success_) then
|
||
|
|
info=psb_err_from_subroutine_
|
||
|
|
ch_err='asb rout.'
|
||
|
|
call psb_errpush(info,name,a_err=ch_err)
|
||
|
|
goto 9999
|
||
|
|
end if
|
||
|
|
if (info == psb_success_) call psb_geasb(xv,desc_a,info,mold=vmold)
|
||
|
|
if (info == psb_success_) call psb_geasb(bv,desc_a,info,mold=vmold)
|
||
|
|
if(info /= psb_success_) then
|
||
|
|
info=psb_err_from_subroutine_
|
||
|
|
ch_err='asb rout.'
|
||
|
|
call psb_errpush(info,name,a_err=ch_err)
|
||
|
|
goto 9999
|
||
|
|
end if
|
||
|
|
tasb = psb_wtime()-t1
|
||
|
|
call psb_barrier(ctxt)
|
||
|
|
ttot = psb_wtime() - t0
|
||
|
|
|
||
|
|
call psb_amx(ctxt,talc)
|
||
|
|
call psb_amx(ctxt,tgen)
|
||
|
|
call psb_amx(ctxt,tasb)
|
||
|
|
call psb_amx(ctxt,ttot)
|
||
|
|
if(iam == psb_root_) then
|
||
|
|
tmpfmt = a%get_fmt()
|
||
|
|
write(psb_out_unit,'("The matrix has been generated and assembled in ",a3," format.")')&
|
||
|
|
& tmpfmt
|
||
|
|
write(psb_out_unit,'("-allocation time : ",es12.5)') talc
|
||
|
|
write(psb_out_unit,'("-coeff. gen. time : ",es12.5)') tgen
|
||
|
|
write(psb_out_unit,'("-desc asbly time : ",es12.5)') tcdasb
|
||
|
|
write(psb_out_unit,'("- mat asbly time : ",es12.5)') tasb
|
||
|
|
write(psb_out_unit,'("-total time : ",es12.5)') ttot
|
||
|
|
|
||
|
|
end if
|
||
|
|
|
||
|
|
call psb_erractionrestore(err_act)
|
||
|
|
return
|
||
|
|
|
||
|
|
9999 call psb_error_handler(ctxt,err_act)
|
||
|
|
|
||
|
|
return
|
||
|
|
end subroutine psb_d_gen_pde3d
|
||
|
|
function outside(i,j,k,bndx,bndy,bndz,iamx,iamy,iamz) result(res)
|
||
|
|
logical :: res
|
||
|
|
integer(psb_ipk_), intent(in) :: i,j,k,iamx,iamy,iamz
|
||
|
|
integer(psb_ipk_), intent(in) :: bndx(0:),bndy(0:),bndz(0:)
|
||
|
|
|
||
|
|
res = (i<bndx(iamx)).or.(i>=bndx(iamx+1)) &
|
||
|
|
& .or.(j<bndy(iamy)).or.(j>=bndy(iamy+1)) &
|
||
|
|
& .or.(k<bndz(iamz)).or.(k>=bndz(iamz+1))
|
||
|
|
end function outside
|
||
|
|
end module psb_d_pde3d_mod
|
||
|
|
|
||
|
|
program psb_d_oacc_pde3d
|
||
|
|
use psb_base_mod
|
||
|
|
use psb_prec_mod
|
||
|
|
use psb_krylov_mod
|
||
|
|
use psb_util_mod
|
||
|
|
use psb_d_pde3d_mod
|
||
|
|
#if defined(OPENACC)
|
||
|
|
use psb_oacc_mod
|
||
|
|
#endif
|
||
|
|
implicit none
|
||
|
|
|
||
|
|
! input parameters
|
||
|
|
character(len=20) :: kmethd, ptype
|
||
|
|
character(len=5) :: afmt, agfmt
|
||
|
|
integer(psb_ipk_) :: idim
|
||
|
|
integer(psb_epk_) :: system_size
|
||
|
|
|
||
|
|
! miscellaneous
|
||
|
|
real(psb_dpk_), parameter :: one = done
|
||
|
|
real(psb_dpk_) :: t1, t2, tprec
|
||
|
|
|
||
|
|
! sparse matrix and preconditioner
|
||
|
|
type(psb_dspmat_type) :: a, agpu
|
||
|
|
type(psb_dprec_type) :: prec
|
||
|
|
! descriptor
|
||
|
|
type(psb_desc_type) :: desc_a
|
||
|
|
! dense vectors
|
||
|
|
type(psb_d_vect_type), target :: xxv, bv, xg, bg
|
||
|
|
#ifdef OPENACC
|
||
|
|
type(psb_d_vect_oacc) :: vmold
|
||
|
|
type(psb_i_vect_oacc) :: imold
|
||
|
|
type(psb_d_oacc_csr_sparse_mat) :: acsrg
|
||
|
|
#endif
|
||
|
|
real(psb_dpk_), allocatable :: x0(:)
|
||
|
|
! parallel environment
|
||
|
|
type(psb_ctxt_type) :: ctxt
|
||
|
|
integer(psb_ipk_) :: iam, np, nth
|
||
|
|
|
||
|
|
! solver parameters
|
||
|
|
integer(psb_ipk_) :: iter, itmax, itrace, istopc, irst, ipart
|
||
|
|
integer(psb_epk_) :: amatsize, precsize, descsize, d2size
|
||
|
|
real(psb_dpk_) :: err, eps
|
||
|
|
|
||
|
|
! Parameters for solvers in Block-Jacobi preconditioner
|
||
|
|
type ainvparms
|
||
|
|
character(len=12) :: alg, orth_alg, ilu_alg, ilut_scale
|
||
|
|
integer(psb_ipk_) :: fill, inv_fill
|
||
|
|
real(psb_dpk_) :: thresh, inv_thresh
|
||
|
|
end type ainvparms
|
||
|
|
type(ainvparms) :: parms
|
||
|
|
|
||
|
|
! other variables
|
||
|
|
integer(psb_ipk_) :: info, i
|
||
|
|
character(len=20) :: name, ch_err
|
||
|
|
character(len=40) :: fname
|
||
|
|
|
||
|
|
info = psb_success_
|
||
|
|
|
||
|
|
call psb_init(ctxt)
|
||
|
|
call psb_info(ctxt, iam, np)
|
||
|
|
|
||
|
|
#if defined(OPENACC)
|
||
|
|
call psb_oacc_init(ctxt)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
nth = 1
|
||
|
|
|
||
|
|
if (iam < 0) then
|
||
|
|
! This should not happen, but just in case
|
||
|
|
call psb_exit(ctxt)
|
||
|
|
stop
|
||
|
|
endif
|
||
|
|
if (psb_errstatus_fatal()) goto 9999
|
||
|
|
name = 'pde3d90_oacc'
|
||
|
|
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(ctxt, kmethd, ptype, afmt, agfmt, idim, istopc, itmax, itrace, irst, ipart, parms)
|
||
|
|
|
||
|
|
! allocate and fill in the coefficient matrix, rhs and initial guess
|
||
|
|
call psb_barrier(ctxt)
|
||
|
|
t1 = psb_wtime()
|
||
|
|
call psb_gen_pde3d(ctxt, idim, a, bv, xxv, desc_a, afmt, info, partition = ipart)
|
||
|
|
call psb_barrier(ctxt)
|
||
|
|
t2 = psb_wtime() - t1
|
||
|
|
if (info /= psb_success_) then
|
||
|
|
info = psb_err_from_subroutine_
|
||
|
|
ch_err = 'psb_gen_pde3d'
|
||
|
|
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, '(" ")')
|
||
|
|
|
||
|
|
#ifdef OPENACC
|
||
|
|
! Convert matrix to GPU format
|
||
|
|
call a%cscnv(agpu, info, mold = acsrg)
|
||
|
|
if ((info /= 0) .or. (psb_get_errstatus() /= 0)) then
|
||
|
|
write(0,*) 'From cscnv ', info
|
||
|
|
call psb_error()
|
||
|
|
stop
|
||
|
|
end if
|
||
|
|
call desc_a%cnv(mold = imold)
|
||
|
|
call psb_geasb(bg, desc_a, info, scratch = .true., mold = vmold)
|
||
|
|
call psb_geasb(xg, desc_a, info, scratch = .true., mold = vmold)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
! prepare the preconditioner.
|
||
|
|
if (iam == psb_root_) write(psb_out_unit, '("Setting preconditioner to : ", a)') ptype
|
||
|
|
call prec%init(ctxt, ptype, info)
|
||
|
|
|
||
|
|
! Set the options for the BJAC preconditioner
|
||
|
|
if (psb_toupper(ptype) == "BJAC") then
|
||
|
|
call prec%set('sub_solve', parms%alg, info)
|
||
|
|
select case (psb_toupper(parms%alg))
|
||
|
|
case ("ILU")
|
||
|
|
call prec%set('sub_fillin', parms%fill, info)
|
||
|
|
call prec%set('ilu_alg', parms%ilu_alg, info)
|
||
|
|
case ("ILUT")
|
||
|
|
call prec%set('sub_fillin', parms%fill, info)
|
||
|
|
call prec%set('sub_iluthrs', parms%thresh, info)
|
||
|
|
call prec%set('ilut_scale', parms%ilut_scale, info)
|
||
|
|
case ("AINV")
|
||
|
|
call prec%set('inv_thresh', parms%inv_thresh, info)
|
||
|
|
call prec%set('inv_fillin', parms%inv_fill, info)
|
||
|
|
call prec%set('ilut_scale', parms%ilut_scale, info)
|
||
|
|
call prec%set('ainv_alg', parms%orth_alg, info)
|
||
|
|
case ("INVK")
|
||
|
|
call prec%set('sub_fillin', parms%fill, info)
|
||
|
|
call prec%set('inv_fillin', parms%inv_fill, info)
|
||
|
|
call prec%set('ilut_scale', parms%ilut_scale, info)
|
||
|
|
case ("INVT")
|
||
|
|
call prec%set('sub_fillin', parms%fill, info)
|
||
|
|
call prec%set('inv_fillin', parms%inv_fill, info)
|
||
|
|
call prec%set('sub_iluthrs', parms%thresh, info)
|
||
|
|
call prec%set('inv_thresh', parms%inv_thresh, info)
|
||
|
|
call prec%set('ilut_scale', parms%ilut_scale, info)
|
||
|
|
case default
|
||
|
|
! Do nothing, use default setting in the init routine
|
||
|
|
end select
|
||
|
|
else
|
||
|
|
! nothing to set for NONE or DIAG preconditioner
|
||
|
|
end if
|
||
|
|
|
||
|
|
call psb_barrier(ctxt)
|
||
|
|
t1 = psb_wtime()
|
||
|
|
call prec%build(a, desc_a, 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(ctxt, tprec)
|
||
|
|
|
||
|
|
if (iam == psb_root_) write(psb_out_unit, '("Preconditioner time : ", es12.5)') tprec
|
||
|
|
if (iam == psb_root_) write(psb_out_unit, '(" ")')
|
||
|
|
call prec%descr(info)
|
||
|
|
|
||
|
|
! iterative method parameters
|
||
|
|
if (iam == psb_root_) write(psb_out_unit, '("Calling iterative method ", a)') kmethd
|
||
|
|
call psb_barrier(ctxt)
|
||
|
|
t1 = psb_wtime()
|
||
|
|
eps = 1.d-6
|
||
|
|
|
||
|
|
#ifdef OPENACC
|
||
|
|
call psb_krylov(kmethd, agpu, prec, bv, xxv, eps, desc_a, info, &
|
||
|
|
itmax = itmax, iter = iter, err = err, itrace = itrace, istop = istopc, irst = irst)
|
||
|
|
#else
|
||
|
|
call psb_krylov(kmethd, a, prec, bv, xxv, eps, desc_a, info, &
|
||
|
|
itmax = itmax, iter = iter, err = err, itrace = itrace, istop = istopc, irst = irst)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
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(ctxt)
|
||
|
|
t2 = psb_wtime() - t1
|
||
|
|
call psb_amx(ctxt, t2)
|
||
|
|
amatsize = a%sizeof()
|
||
|
|
descsize = desc_a%sizeof()
|
||
|
|
precsize = prec%sizeof()
|
||
|
|
system_size = desc_a%get_global_rows()
|
||
|
|
call psb_sum(ctxt, amatsize)
|
||
|
|
call psb_sum(ctxt, descsize)
|
||
|
|
call psb_sum(ctxt, precsize)
|
||
|
|
|
||
|
|
if (iam == psb_root_) then
|
||
|
|
write(psb_out_unit, '(" ")')
|
||
|
|
write(psb_out_unit, '("Number of processes : ", i12)') np
|
||
|
|
write(psb_out_unit, '("Number of threads : ", i12)') nth
|
||
|
|
write(psb_out_unit, '("Total number of tasks : ", i12)') nth * np
|
||
|
|
write(psb_out_unit, '("Linear system size : ", i12)') system_size
|
||
|
|
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, '("Number of iterations : ", i12)') iter
|
||
|
|
write(psb_out_unit, '("Convergence indicator on exit : ", es12.5)') err
|
||
|
|
write(psb_out_unit, '("Info on exit : ", i12)') 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 format for A: ", a)') a%get_fmt()
|
||
|
|
write(psb_out_unit, '("Storage format for DESC_A: ", a)') desc_a%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 prec%free(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
|
||
|
|
|
||
|
|
#ifdef OPENACC
|
||
|
|
call psb_oacc_exit()
|
||
|
|
#endif
|
||
|
|
call psb_exit(ctxt)
|
||
|
|
stop
|
||
|
|
|
||
|
|
9999 call psb_error(ctxt)
|
||
|
|
|
||
|
|
stop
|
||
|
|
|
||
|
|
contains
|
||
|
|
! get iteration parameters from standard input
|
||
|
|
subroutine get_parms(ctxt, kmethd, ptype, afmt, agfmt, idim, istopc, itmax, itrace, irst, ipart, parms)
|
||
|
|
type(psb_ctxt_type) :: ctxt
|
||
|
|
character(len = *) :: kmethd, ptype, afmt, agfmt
|
||
|
|
integer(psb_ipk_) :: idim, istopc, itmax, itrace, irst, ipart
|
||
|
|
integer(psb_ipk_) :: np, iam
|
||
|
|
integer(psb_ipk_) :: ip, inp_unit
|
||
|
|
character(len = 1024) :: filename
|
||
|
|
type(ainvparms) :: parms
|
||
|
|
|
||
|
|
call psb_info(ctxt, iam, np)
|
||
|
|
|
||
|
|
if (iam == 0) then
|
||
|
|
if (command_argument_count() > 0) then
|
||
|
|
call get_command_argument(1, filename)
|
||
|
|
inp_unit = 30
|
||
|
|
open(inp_unit, file = filename, action = 'read', iostat = info)
|
||
|
|
if (info /= 0) then
|
||
|
|
write(psb_err_unit, *) 'Could not open file ', filename, ' for input'
|
||
|
|
call psb_abort(ctxt)
|
||
|
|
stop
|
||
|
|
else
|
||
|
|
write(psb_err_unit, *) 'Opened file ', trim(filename), ' for input'
|
||
|
|
end if
|
||
|
|
else
|
||
|
|
inp_unit = psb_inp_unit
|
||
|
|
end if
|
||
|
|
read(inp_unit, *) ip
|
||
|
|
if (ip >= 3) then
|
||
|
|
read(inp_unit, *) kmethd
|
||
|
|
read(inp_unit, *) ptype
|
||
|
|
read(inp_unit, *) afmt
|
||
|
|
read(inp_unit, *) agfmt
|
||
|
|
read(inp_unit, *) idim
|
||
|
|
if (ip >= 4) then
|
||
|
|
read(inp_unit, *) ipart
|
||
|
|
else
|
||
|
|
ipart = 3
|
||
|
|
endif
|
||
|
|
if (ip >= 5) then
|
||
|
|
read(inp_unit, *) istopc
|
||
|
|
else
|
||
|
|
istopc = 1
|
||
|
|
endif
|
||
|
|
if (ip >= 6) then
|
||
|
|
read(inp_unit, *) itmax
|
||
|
|
else
|
||
|
|
itmax = 500
|
||
|
|
endif
|
||
|
|
if (ip >= 7) then
|
||
|
|
read(inp_unit, *) itrace
|
||
|
|
else
|
||
|
|
itrace = -1
|
||
|
|
endif
|
||
|
|
if (ip >= 8) then
|
||
|
|
read(inp_unit, *) irst
|
||
|
|
else
|
||
|
|
irst = 1
|
||
|
|
endif
|
||
|
|
if (ip >= 9) then
|
||
|
|
read(inp_unit, *) parms%alg
|
||
|
|
read(inp_unit, *) parms%ilu_alg
|
||
|
|
read(inp_unit, *) parms%ilut_scale
|
||
|
|
read(inp_unit, *) parms%fill
|
||
|
|
read(inp_unit, *) parms%inv_fill
|
||
|
|
read(inp_unit, *) parms%thresh
|
||
|
|
read(inp_unit, *) parms%inv_thresh
|
||
|
|
read(inp_unit, *) parms%orth_alg
|
||
|
|
else
|
||
|
|
parms%alg = 'ILU' ! Block Solver ILU, ILUT, INVK, AINVT, AORTH
|
||
|
|
parms%ilu_alg = 'NONE' ! If ILU : MILU or NONE otherwise ignored
|
||
|
|
parms%ilut_scale = 'NONE' ! If ILUT: NONE, MAXVAL, DIAG, ARWSUM, ACLSUM, ARCSUM
|
||
|
|
parms%fill = 0 ! Level of fill for forward factorization
|
||
|
|
parms%inv_fill = 1 ! Level of fill for inverse factorization (only INVK)
|
||
|
|
parms%thresh = 1E-1_psb_dpk_ ! Threshold for forward factorization
|
||
|
|
parms%inv_thresh = 1E-1_psb_dpk_ ! Threshold for inverse factorization
|
||
|
|
parms%orth_alg = 'LLK' ! What orthogonalization algorithm?
|
||
|
|
endif
|
||
|
|
|
||
|
|
write(psb_out_unit, '("Solving matrix : ell1")')
|
||
|
|
write(psb_out_unit, &
|
||
|
|
'("Grid dimensions : ", i4, " x ", i4, " x ", i4)') &
|
||
|
|
idim, idim, idim
|
||
|
|
write(psb_out_unit, '("Number of processors : ", i0)') np
|
||
|
|
select case (ipart)
|
||
|
|
case (1)
|
||
|
|
write(psb_out_unit, '("Data distribution : BLOCK")')
|
||
|
|
case (3)
|
||
|
|
write(psb_out_unit, '("Data distribution : 3D")')
|
||
|
|
case default
|
||
|
|
ipart = 3
|
||
|
|
write(psb_out_unit, '("Unknown data distrbution, defaulting to 3D")')
|
||
|
|
end select
|
||
|
|
write(psb_out_unit, '("Preconditioner : ", a)') ptype
|
||
|
|
if (psb_toupper(ptype) == "BJAC") then
|
||
|
|
write(psb_out_unit, '("Block subsolver : ", a)') parms%alg
|
||
|
|
select case (psb_toupper(parms%alg))
|
||
|
|
case ('ILU')
|
||
|
|
write(psb_out_unit, '("Fill in : ", i0)') parms%fill
|
||
|
|
write(psb_out_unit, '("MILU : ", a)') parms%ilu_alg
|
||
|
|
case ('ILUT')
|
||
|
|
write(psb_out_unit, '("Fill in : ", i0)') parms%fill
|
||
|
|
write(psb_out_unit, '("Threshold : ", es12.5)') parms%thresh
|
||
|
|
write(psb_out_unit, '("Scaling : ", a)') parms%ilut_scale
|
||
|
|
case ('INVK')
|
||
|
|
write(psb_out_unit, '("Fill in : ", i0)') parms%fill
|
||
|
|
write(psb_out_unit, '("Invese Fill in : ", i0)') parms%inv_fill
|
||
|
|
write(psb_out_unit, '("Scaling : ", a)') parms%ilut_scale
|
||
|
|
case ('INVT')
|
||
|
|
write(psb_out_unit, '("Fill in : ", i0)') parms%fill
|
||
|
|
write(psb_out_unit, '("Threshold : ", es12.5)') parms%thresh
|
||
|
|
write(psb_out_unit, '("Invese Fill in : ", i0)') parms%inv_fill
|
||
|
|
write(psb_out_unit, '("Inverse Threshold : ", es12.5)') parms%inv_thresh
|
||
|
|
write(psb_out_unit, '("Scaling : ", a)') parms%ilut_scale
|
||
|
|
case ('AINV', 'AORTH')
|
||
|
|
write(psb_out_unit, '("Inverse Threshold : ", es12.5)') parms%inv_thresh
|
||
|
|
write(psb_out_unit, '("Invese Fill in : ", i0)') parms%inv_fill
|
||
|
|
write(psb_out_unit, '("Orthogonalization : ", a)') parms%orth_alg
|
||
|
|
write(psb_out_unit, '("Scaling : ", a)') parms%ilut_scale
|
||
|
|
case default
|
||
|
|
write(psb_out_unit, '("Unknown diagonal solver")')
|
||
|
|
end select
|
||
|
|
end if
|
||
|
|
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(izero)
|
||
|
|
call psb_abort(ctxt)
|
||
|
|
stop 1
|
||
|
|
endif
|
||
|
|
if (inp_unit /= psb_inp_unit) then
|
||
|
|
close(inp_unit)
|
||
|
|
end if
|
||
|
|
end if
|
||
|
|
! broadcast parameters to all processors
|
||
|
|
call psb_bcast(ctxt, kmethd)
|
||
|
|
call psb_bcast(ctxt, afmt)
|
||
|
|
call psb_bcast(ctxt, agfmt)
|
||
|
|
call psb_bcast(ctxt, ptype)
|
||
|
|
call psb_bcast(ctxt, idim)
|
||
|
|
call psb_bcast(ctxt, ipart)
|
||
|
|
call psb_bcast(ctxt, istopc)
|
||
|
|
call psb_bcast(ctxt, itmax)
|
||
|
|
call psb_bcast(ctxt, itrace)
|
||
|
|
call psb_bcast(ctxt, irst)
|
||
|
|
call psb_bcast(ctxt, parms%alg)
|
||
|
|
call psb_bcast(ctxt, parms%fill)
|
||
|
|
call psb_bcast(ctxt, parms%inv_fill)
|
||
|
|
call psb_bcast(ctxt, parms%thresh)
|
||
|
|
call psb_bcast(ctxt, parms%inv_thresh)
|
||
|
|
call psb_bcast(ctxt, parms%orth_alg)
|
||
|
|
call psb_bcast(ctxt, parms%ilut_scale)
|
||
|
|
|
||
|
|
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: pde3d90 methd prec dim &'
|
||
|
|
write(iout, *) '[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, *) ' ipart data partition 1 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
|
||
|
|
|
||
|
|
end program psb_d_oacc_pde3d
|