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Grid/tests/debug/test_Grid_jacobi.cc

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/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./tests/test_Grid_jacobi.cc
Copyright (C) 2015
Author: Peter Boyle <paboyle@ph.ed.ac.uk>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
See the full license in the file "LICENSE" in the top level distribution directory
*************************************************************************************/
/* END LEGAL */
#include <Grid/Grid.h>
using namespace std;
using namespace Grid;
;
template<class vobj>
class LinearOperator {
public:
operator () (const Lattice<vobj>&src,Lattice<vobj> &result) {};
};
template<class vobj>
class LinearOperatorJacobi : public LinearOperator<vobj>
{
CartesianStencil *Stencil;
GridBase *_grid;
std::vector<vobj,alignedAllocator<vobj> > comm_buf;
LinearOperatorJacobi(GridCartesian *grid)
{
_grid = grid;
int npoint=9;
std::vector<int> directions(npoint);
std::vector<int> displacements(npoint);
for(int mu=0;mu<4;mu++){
for(int mp=0;mp<2;mp++){
int dir = 2*mu+mp;
directions[dir] = mu;
displacements[dir]= -1+2*mp;
}
}
directions[8] = 0;
displacements[8] = 0;
Stencil = new CartesianStencil(grid,npoint,0,directions,displacements);
comm_buf.resize(Stencil->_unified_buffer_size);
}
operator () (const Lattice<vobj>&src,Lattice<vobj> &result)
{
const int npoint=9;
printf("calling halo exchange\n");fflush(stdout);
myStencil.HaloExchange(Foo,comm_buf);
vobj tmp;
vobj
for(int i=0;i<_grid->oSites();i++){
for(int p=0;p<npoint;p++){
int offset = Stencil->_offsets [p][i];
int local = Stencil->_is_local[p][i];
int ptype = Stencil->_permute_type[p];
int perm = Stencil->_permute[0][i];
vobj *nbr;
if ( local && perm ){
permute(tmp,src._odata[offset],ptype);
nbr = &tmp;
} else if (local) {
nbr = &src._odata[offset];
} else {
nbr = &comm_buf[offset];
}
result[i] = result[i]+*nbr;
}
}
}
~LinearOperatorJacobi()
{
delete Stencil;
}
}
int main (int argc, char ** argv)
{
Grid_init(&argc,&argv);
std::vector<int> latt_size (4);
std::vector<int> simd_layout(4);
std::vector<int> mpi_layout (4);
int omp=1;
int lat=8;
mpi_layout[0]=1;
mpi_layout[1]=2;
mpi_layout[2]=1;
mpi_layout[3]=1;
latt_size[0] = lat;
latt_size[1] = lat;
latt_size[2] = lat;
latt_size[3] = lat;
double volume = latt_size[0]*latt_size[1]*latt_size[2]*latt_size[3];
#ifdef AVX512
simd_layout[0] = 1;
simd_layout[1] = 2;
simd_layout[2] = 2;
simd_layout[3] = 2;
#endif
#if defined (AVX1)|| defined (AVX2)
simd_layout[0] = 1;
simd_layout[1] = 1;
simd_layout[2] = 2;
simd_layout[3] = 2;
#endif
#if defined (SSE2)
simd_layout[0] = 1;
simd_layout[1] = 1;
simd_layout[2] = 1;
simd_layout[3] = 2;
#endif
GridCartesian Fine(latt_size,simd_layout,mpi_layout);
GridRedBlackCartesian rbFine(latt_size,simd_layout,mpi_layout);
LatticeColourMatrix Foo(&Fine);
LatticeColourMatrix Bar(&Fine);
LatticeColourMatrix Check(&Fine);
LatticeColourMatrix Diff(&Fine);
random(Foo);
gaussian(Bar);
for(int dir=0;dir<4;dir++){
for(int disp=0;disp<Fine._rdimensions[dir];disp++){
// start to test the Cartesian npoint stencil infrastructure
int npoint=;
std::vector<int> directions(npoint,dir);
std::vector<int> displacements(npoint,disp);
CartesianStencil myStencil(&Fine,npoint,0,directions,displacements);
printf("STENCIL: osites %d %d dir %d disp %d\n",Fine.oSites(),(int)myStencil._offsets[0].size(),dir,disp);
std::vector<int> ocoor(4);
for(int o=0;o<Fine.oSites();o++){
Fine.oCoorFromOindex(ocoor,o);
ocoor[dir]=(ocoor[dir]+disp)%Fine._rdimensions[dir];
int nbr = Fine.oIndexReduced(ocoor);
int stcl= myStencil._offsets[0][o];
if(nbr!=stcl){
printf("STENCIL: nbr %d stencil._offset %d\n",nbr,stcl);
}
}
printf("allocating %d buffers\n",myStencil._unified_buffer_size);
fflush(stdout);
std::vector<vColourMatrix,alignedAllocator<vColourMatrix> > comm_buf(myStencil._unified_buffer_size);
printf("calling halo exchange\n");fflush(stdout);
myStencil.HaloExchange(Foo,comm_buf);
Bar = Cshift(Foo,dir,disp);
// Implement a stencil code that should agree with cshift!
for(int i=0;i<Check._grid->oSites();i++){
int offset = myStencil._offsets [0][i];
int local = myStencil._is_local[0][i];
int permute_type = myStencil._permute_type[0];
int perm =myStencil._permute[0][i];
if ( local && perm )
permute(Check._odata[i],Foo._odata[offset],permute_type);
else if (local)
Check._odata[i] = Foo._odata[offset];
else
Check._odata[i] = comm_buf[offset];
}
std::vector<int> coor(4);
for(coor[3]=0;coor[3]<latt_size[3]/mpi_layout[3];coor[3]++){
for(coor[2]=0;coor[2]<latt_size[2]/mpi_layout[2];coor[2]++){
for(coor[1]=0;coor[1]<latt_size[1]/mpi_layout[1];coor[1]++){
for(coor[0]=0;coor[0]<latt_size[0]/mpi_layout[0];coor[0]++){
Complex diff;
ColourMatrix check,bar;
peekSite(check,Check,coor);
peekSite(bar,Bar,coor);
for(int r=0;r<3;r++){
for(int c=0;c<3;c++){
diff =check._internal._internal[r][c]-bar._internal._internal[r][c];
double nn=real(conjugate(diff)*diff);
if ( nn > 0 ){
printf("Coor (%d %d %d %d) \t rc %d%d \t %le %le %le\n",
coor[0],coor[1],coor[2],coor[3],r,c,
nn,
real(check._internal._internal[r][c]),
real(bar._internal._internal[r][c])
);
}
}}
}}}}
}
}
Grid_finalize();
}
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