mirror of
https://github.com/paboyle/Grid.git
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121 lines
3.3 KiB
C++
121 lines
3.3 KiB
C++
#include "Grid.h"
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using namespace std;
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using namespace Grid;
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using namespace Grid::QCD;
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int main (int argc, char ** argv)
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{
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Grid_init(&argc,&argv);
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std::vector<int> latt_size = GridDefaultLatt();
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std::vector<int> simd_layout = GridDefaultSimd(Nd,vComplex::Nsimd());
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std::vector<int> mpi_layout = GridDefaultMpi();
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double volume = latt_size[0]*latt_size[1]*latt_size[2]*latt_size[3];
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GridCartesian Fine(latt_size,simd_layout,mpi_layout);
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GridRedBlackCartesian rbFine(latt_size,simd_layout,mpi_layout);
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GridParallelRNG fRNG(&Fine);
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// fRNG.SeedRandomDevice();
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std::vector<int> seeds({1,2,3,4});
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fRNG.SeedFixedIntegers(seeds);
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LatticeColourMatrix Foo(&Fine);
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LatticeColourMatrix Bar(&Fine);
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LatticeColourMatrix Check(&Fine);
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LatticeColourMatrix Diff(&Fine);
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random(fRNG,Foo);
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gaussian(fRNG,Bar);
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for(int dir=0;dir<4;dir++){
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for(int disp=0;disp<Fine._fdimensions[dir];disp++){
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std::cout<<GridLogMessage << "Using stencil to shift dim "<<dir<< " by "<<disp<<std::endl;
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// start to test the Cartesian npoint stencil infrastructure
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int npoint=1;
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std::vector<int> directions(npoint,dir);
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std::vector<int> displacements(npoint,disp);
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CartesianStencil myStencil(&Fine,npoint,0,directions,displacements);
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std::vector<int> ocoor(4);
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for(int o=0;o<Fine.oSites();o++){
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Fine.oCoorFromOindex(ocoor,o);
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ocoor[dir]=(ocoor[dir]+disp)%Fine._rdimensions[dir];
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}
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std::vector<vColourMatrix,alignedAllocator<vColourMatrix> > comm_buf(myStencil._unified_buffer_size);
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SimpleCompressor<vColourMatrix> compress;
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myStencil.HaloExchange(Foo,comm_buf,compress);
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Bar = Cshift(Foo,dir,disp);
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// Implement a stencil code that should agree with cshift!
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for(int i=0;i<Check._grid->oSites();i++){
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int permute_type;
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StencilEntry *SE;
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SE = myStencil.GetEntry(permute_type,0,i);
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if ( SE->_is_local && SE->_permute )
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permute(Check._odata[i],Foo._odata[SE->_offset],permute_type);
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else if (SE->_is_local)
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Check._odata[i] = Foo._odata[SE->_offset];
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else
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Check._odata[i] = comm_buf[SE->_offset];
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}
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Real nrmC = norm2(Check);
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Real nrmB = norm2(Bar);
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Diff = Check-Bar;
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Real nrm = norm2(Diff);
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std::cout<<GridLogMessage<<"N2diff ="<<nrm<<" "<<nrmC<<" " <<nrmB<<std::endl;
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Real snrmC =0;
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Real snrmB =0;
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Real snrm =0;
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std::vector<int> coor(4);
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for(coor[3]=0;coor[3]<latt_size[3]/mpi_layout[3];coor[3]++){
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for(coor[2]=0;coor[2]<latt_size[2]/mpi_layout[2];coor[2]++){
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for(coor[1]=0;coor[1]<latt_size[1]/mpi_layout[1];coor[1]++){
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for(coor[0]=0;coor[0]<latt_size[0]/mpi_layout[0];coor[0]++){
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Complex diff;
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ColourMatrix check,bar;
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peekSite(check,Check,coor);
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peekSite(bar,Bar,coor);
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for(int r=0;r<3;r++){
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for(int c=0;c<3;c++){
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diff =check()()(r,c)-bar()()(r,c);
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double nn=real(conjugate(diff)*diff);
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if ( nn > 0){
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printf("Coor (%d %d %d %d) \t rc %d%d \t %le (%le,%le) %le\n",
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coor[0],coor[1],coor[2],coor[3],r,c,
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nn,
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real(check()()(r,c)),
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imag(check()()(r,c)),
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real(bar()()(r,c))
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);
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}
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snrmC=snrmC+real(conjugate(check()()(r,c))*check()()(r,c));
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snrmB=snrmB+real(conjugate(bar()()(r,c))*bar()()(r,c));
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snrm=snrm+nn;
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}}
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}}}}
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std::cout<<GridLogMessage<<"scalar N2diff = "<<snrm<<" " <<snrmC<<" "<<snrmB<<std::endl;
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}
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}
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Grid_finalize();
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}
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