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238 lines
7.0 KiB
C++
238 lines
7.0 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./benchmarks/Benchmark_wilson.cc
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Copyright (C) 2018
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Author: Peter Boyle <paboyle@ph.ed.ac.uk>
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Author: paboyle <paboyle@ph.ed.ac.uk>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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See the full license in the file "LICENSE" in the top level distribution directory
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*************************************************************************************/
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/* END LEGAL */
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#include <Grid/Grid.h>
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using namespace std;
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using namespace Grid;
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;
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#include "Grid/util/Profiling.h"
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template<class d>
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struct scal {
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d internal;
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};
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Gamma::Algebra Gmu [] = {
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Gamma::Algebra::GammaX,
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Gamma::Algebra::GammaY,
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Gamma::Algebra::GammaZ,
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Gamma::Algebra::GammaT
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};
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bool overlapComms = false;
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bool perfProfiling = false;
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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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if( GridCmdOptionExists(argv,argv+argc,"--asynch") ){
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overlapComms = true;
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}
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if( GridCmdOptionExists(argv,argv+argc,"--perf") ){
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perfProfiling = true;
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}
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long unsigned int single_site_flops = 8*Nc*(7+16*Nc);
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auto latt_size = GridDefaultLatt();
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auto simd_layout = GridDefaultSimd(Nd,vComplex::Nsimd());
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auto mpi_layout = GridDefaultMpi();
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GridCartesian Grid(latt_size,simd_layout,mpi_layout);
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GridRedBlackCartesian RBGrid(&Grid);
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int threads = GridThread::GetThreads();
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GridLogLayout();
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std::cout<<GridLogMessage << "Grid floating point word size is REALF"<< sizeof(RealF)<<std::endl;
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std::cout<<GridLogMessage << "Grid floating point word size is REALD"<< sizeof(RealD)<<std::endl;
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std::cout<<GridLogMessage << "Grid floating point word size is REAL"<< sizeof(Real)<<std::endl;
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std::cout<<GridLogMessage << "Grid number of colours : "<< Nc <<std::endl;
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std::cout<<GridLogMessage << "Benchmarking Wilson operator in the fundamental representation" << std::endl;
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std::vector<int> seeds({1,2,3,4});
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GridParallelRNG pRNG(&Grid);
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pRNG.SeedFixedIntegers(seeds);
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// pRNG.SeedFixedIntegers(std::vector<int>({45,12,81,9});
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LatticeFermion src (&Grid); random(pRNG,src);
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LatticeFermion result(&Grid); result=Zero();
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LatticeFermion ref(&Grid); ref=Zero();
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LatticeFermion tmp(&Grid); tmp=Zero();
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LatticeFermion err(&Grid); tmp=Zero();
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LatticeGaugeField Umu(&Grid); random(pRNG,Umu);
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std::vector<LatticeColourMatrix> U(4,&Grid);
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double volume=1;
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for(int mu=0;mu<Nd;mu++){
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volume=volume*latt_size[mu];
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}
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// Only one non-zero (y)
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#if 0
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Umu=Zero();
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Complex cone(1.0,0.0);
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for(int nn=0;nn<Nd;nn++){
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random(pRNG,U[nn]);
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if(1) {
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if (nn!=2) { U[nn]=Zero(); std::cout<<GridLogMessage << "zeroing gauge field in dir "<<nn<<std::endl; }
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// else { U[nn]= cone;std::cout<<GridLogMessage << "unit gauge field in dir "<<nn<<std::endl; }
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else { std::cout<<GridLogMessage << "random gauge field in dir "<<nn<<std::endl; }
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}
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PokeIndex<LorentzIndex>(Umu,U[nn],nn);
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}
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#endif
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for(int mu=0;mu<Nd;mu++){
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U[mu] = PeekIndex<LorentzIndex>(Umu,mu);
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}
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{ // Naive wilson implementation
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ref = Zero();
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for(int mu=0;mu<Nd;mu++){
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// ref = src + Gamma(Gamma::Algebra::GammaX)* src ; // 1-gamma_x
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tmp = U[mu]*Cshift(src,mu,1);
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{
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auto ref_v = ref.View();
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auto tmp_v = tmp.View();
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for(int i=0;i<ref_v.size();i++){
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ref_v[i]+= tmp_v[i] - Gamma(Gmu[mu])*tmp_v[i]; ;
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}
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}
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tmp =adj(U[mu])*src;
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tmp =Cshift(tmp,mu,-1);
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{
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auto ref_v = ref.View();
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auto tmp_v = tmp.View();
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for(int i=0;i<ref_v.size();i++){
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ref_v[i]+= tmp_v[i] + Gamma(Gmu[mu])*tmp_v[i]; ;
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}
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}
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}
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}
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ref = -0.5*ref;
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RealD mass=0.1;
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typename WilsonFermionR::ImplParams params;
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WilsonFermionR Dw(Umu,Grid,RBGrid,mass,params);
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std::cout<<GridLogMessage << "Calling Dw"<<std::endl;
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int ncall=1000;
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//int ncall=1;
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double t0=usecond();
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for(int i=0;i<ncall;i++){
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Dw.Dhop(src,result,0);
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}
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double t1=usecond();
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double flops=single_site_flops*volume*ncall;
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if (perfProfiling){
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std::cout<<GridLogMessage << "Profiling Dw with perf"<<std::endl;
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System::profile("kernel", [&]() {
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for(int i=0;i<ncall;i++){
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Dw.Dhop(src,result,0);
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}
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});
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std::cout<<GridLogMessage << "Generated kernel.data"<<std::endl;
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std::cout<<GridLogMessage << "Use with: perf report -i kernel.data"<<std::endl;
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}
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double data = (volume * 180 * 64 / 4 * ncall) / (1024.*1024.*1024.);
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std::cout<<GridLogMessage << "Called Dw"<<std::endl;
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std::cout<<GridLogMessage << "flops per site " << single_site_flops << std::endl;
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std::cout<<GridLogMessage << "norm result "<< norm2(result)<<std::endl;
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std::cout<<GridLogMessage << "norm ref "<< norm2(ref)<<std::endl;
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std::cout<<GridLogMessage << "mflop/s = "<< flops/(t1-t0)<<std::endl;
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std::cout<<GridLogMessage << "GiB/s (base 2) = "<< 1000000. * data/((t1-t0))<<std::endl;
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err = ref-result;
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std::cout<<GridLogMessage << "norm diff "<< norm2(err)<<std::endl;
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// for(int ss=0;ss<10;ss++ ){
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for(int ss=0;ss<0;ss++ ){
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for(int i=0;i<Ns;i++){
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for(int j=0;j<Nc;j++){
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auto ref_v = ref.View();
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auto result_v = result.View();
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ComplexF * ref_p = (ComplexF *)&ref_v[ss]()(i)(j);
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ComplexF * res_p = (ComplexF *)&result_v[ss]()(i)(j);
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std::cout<<GridLogMessage << ss<< " "<<i<<" "<<j<<" "<< (*ref_p)<<" " <<(*res_p)<<std::endl;
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}
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}
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}
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{ // Naive wilson dag implementation
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ref = Zero();
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for(int mu=0;mu<Nd;mu++){
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// ref = src - Gamma(Gamma::Algebra::GammaX)* src ; // 1+gamma_x
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tmp = U[mu]*Cshift(src,mu,1);
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{
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auto ref_v = ref.View();
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auto tmp_v = tmp.View();
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for(int i=0;i<ref_v.size();i++){
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ref_v[i]+= tmp_v[i] + Gamma(Gmu[mu])*tmp_v[i]; ;
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}
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}
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tmp =adj(U[mu])*src;
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tmp =Cshift(tmp,mu,-1);
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{
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auto ref_v = ref.View();
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auto tmp_v = tmp.View();
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for(int i=0;i<ref_v.size();i++){
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ref_v[i]+= tmp_v[i] - Gamma(Gmu[mu])*tmp_v[i]; ;
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}
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}
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}
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}
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ref = -0.5*ref;
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Dw.Dhop(src,result,1);
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std::cout<<GridLogMessage << "Called DwDag"<<std::endl;
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std::cout<<GridLogMessage << "norm result "<< norm2(result)<<std::endl;
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std::cout<<GridLogMessage << "norm ref "<< norm2(ref)<<std::endl;
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err = ref-result;
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std::cout<<GridLogMessage << "norm diff "<< norm2(err)<<std::endl;
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Grid_finalize();
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}
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