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Schur operator
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Peter Boyle
176
benchmarks/Benchmark_schur.cc
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176
benchmarks/Benchmark_schur.cc
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/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./benchmarks/Benchmark_dwf.cc
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Copyright (C) 2015
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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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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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void benchDw(std::vector<int> & L, int Ls);
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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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const int Ls=12;
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std::vector< std::vector<int> > latts;
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#if 0
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latts.push_back(std::vector<int> ({24,24,24,24}) );
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latts.push_back(std::vector<int> ({48,24,24,24}) );
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latts.push_back(std::vector<int> ({96,24,24,24}) );
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latts.push_back(std::vector<int> ({96,48,24,24}) );
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// latts.push_back(std::vector<int> ({96,48,48,24}) );
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// latts.push_back(std::vector<int> ({96,48,48,48}) );
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#else
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// latts.push_back(std::vector<int> ({96,48,48,48}) );
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latts.push_back(std::vector<int> ({96,96,96,192}) );
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#endif
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std::cout << GridLogMessage<< "*****************************************************************" <<std::endl;
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std::cout << GridLogMessage<< "* Kernel options --dslash-generic, --dslash-unroll, --dslash-asm" <<std::endl;
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std::cout << GridLogMessage<< "*****************************************************************" <<std::endl;
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if ( WilsonKernelsStatic::Opt == WilsonKernelsStatic::OptGeneric ) std::cout << GridLogMessage<< "* Using GENERIC Nc WilsonKernels" <<std::endl;
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if ( WilsonKernelsStatic::Opt == WilsonKernelsStatic::OptHandUnroll) std::cout << GridLogMessage<< "* Using Nc=3 WilsonKernels" <<std::endl;
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if ( WilsonKernelsStatic::Opt == WilsonKernelsStatic::OptInlineAsm ) std::cout << GridLogMessage<< "* Using Asm Nc=3 WilsonKernels" <<std::endl;
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std::cout << GridLogMessage<< "*****************************************************************" <<std::endl;
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int threads = GridThread::GetThreads();
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std::cout<<GridLogMessage << "Grid is setup to use "<<threads<<" threads"<<std::endl;
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std::cout<<GridLogMessage << "=========================================================================="<<std::endl;
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std::cout<<GridLogMessage << "= Benchmarking DWF"<<std::endl;
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std::cout<<GridLogMessage << "=========================================================================="<<std::endl;
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std::cout<<GridLogMessage << "Volume \t\t\tProcs \t SchurDiagOne "<<std::endl;
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std::cout<<GridLogMessage << "=========================================================================="<<std::endl;
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for (int l=0;l<latts.size();l++){
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std::vector<int> latt4 = latts[l];
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std::cout << GridLogMessage <<"\t";
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for(int d=0;d<Nd;d++){
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std::cout<<latt4[d]<<"x";
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}
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std::cout <<Ls<<"\t" ;
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benchDw (latt4,Ls);
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}
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std::cout<<GridLogMessage << "=========================================================================="<<std::endl;
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Grid_finalize();
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}
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void benchDw(std::vector<int> & latt4, int Ls)
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{
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/////////////////////////////////////////////////////////////////////////////////////
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// for Nc=3
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/////////////////////////////////////////////////////////////////////////////////////
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// Dw : Ls*24*(7+48)= Ls*1320
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//
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// M5D: Ls*(4*2*Nc mul + 4*2*Nc madd ) = 3*4*2*Nc*Ls = Ls*72
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// Meo: Ls*24*(7+48) + Ls*72 = Ls*1392
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//
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// Mee: 3*Ns*2*Nc*Ls // Chroma 6*N5*Nc*Ns
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//
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// LeemInv : 2*2*Nc*madd*Ls
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// LeeInv : 2*2*Nc*madd*Ls
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// DeeInv : 4*2*Nc*mul *Ls
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// UeeInv : 2*2*Nc*madd*Ls
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// UeemInv : 2*2*Nc*madd*Ls = Nc*Ls*(8+8+8+8+8) = 40*Nc*Ls// Chroma (10*N5 - 8)*Nc*Ns ~ (40 N5 - 32)Nc flops
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// QUDA counts as dense LsxLs real matrix x Ls x NcNsNreim => Nc*4*2 x Ls^2 FMA = 16Nc Ls^2 flops
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// Mpc => 1452*cbvol*2*Ls flops //
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// => (1344+Ls*48)*Ls*cbvol*2 flops QUDA = 1920 @Ls=12 and 2112 @Ls=16
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/////////////////////////////////////////////////////////////////////////////////////
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GridCartesian * UGrid = SpaceTimeGrid::makeFourDimGrid(latt4, GridDefaultSimd(Nd,vComplexF::Nsimd()),GridDefaultMpi());
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GridRedBlackCartesian * UrbGrid = SpaceTimeGrid::makeFourDimRedBlackGrid(UGrid);
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GridCartesian * FGrid = SpaceTimeGrid::makeFiveDimGrid(Ls,UGrid);
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GridRedBlackCartesian * FrbGrid = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,UGrid);
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// long unsigned int single_site_flops = 8*Nc*(7+16*Nc)*Ls;
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long unsigned int single_site_mpc_flops = 8*Nc*(7+16*Nc)*2*Ls + 40*Nc*2*Ls + 4*Nc*2*Ls;
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long unsigned int single_site_quda_flops = 8*Nc*(7+16*Nc)*2*Ls + 16*Nc*Ls*Ls + 4*Nc*2*Ls;
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std::vector<int> seeds4({1,2,3,4});
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std::vector<int> seeds5({5,6,7,8});
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ColourMatrixF cm = ComplexF(1.0,0.0);
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int ncall=300;
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RealD mass=0.1;
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RealD M5 =1.8;
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RealD NP = UGrid->_Nprocessors;
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double volume=1; for(int mu=0;mu<Nd;mu++) volume=volume*latt4[mu];
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LatticeGaugeFieldF Umu(UGrid); Umu=Zero();
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MobiusFermionF Dw(Umu,*FGrid,*FrbGrid,*UGrid,*UrbGrid,mass,M5,1.5,0.5);
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LatticeFermionF src_o (FrbGrid); src_o=1.0;
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LatticeFermionF r_o (FrbGrid); r_o=Zero();
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int order =151;
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SchurDiagOneOperator<MobiusFermionF,LatticeFermionF> Mpc(Dw);
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Chebyshev<LatticeFermionF> Cheby(0.0,60.0,order);
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{
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Mpc.Mpc(src_o,r_o);
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Mpc.Mpc(src_o,r_o);
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Mpc.Mpc(src_o,r_o);
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double t0=usecond();
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for(int i=0;i<ncall;i++){
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Mpc.Mpc(src_o,r_o);
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}
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double t1=usecond();
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double flops=(single_site_mpc_flops*volume*ncall); // Mpc has 1 - Moo^-1 Moe Mee^-1 Meo so CB cancels.
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std::cout <<"\t"<<NP<< "\t"<<flops/(t1-t0);
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flops=(single_site_quda_flops*volume*ncall);
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std::cout <<"\t"<<flops/(t1-t0)<<"\t"<<(t1-t0)/1000./1000.<<" s\t";
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// Cheby uses MpcDagMpc so 2x flops
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for(int i=0;i<100;i++){
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Cheby(Mpc,src_o,r_o);
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t0=usecond();
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Cheby(Mpc,src_o,r_o);
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t1=usecond();
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flops=(single_site_mpc_flops*volume*2*order);
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std::cout <<"\t"<<flops/(t1-t0);
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flops=(single_site_quda_flops*volume*2*order);
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std::cout <<"\t"<<flops/(t1-t0) << "\t" << (t1-t0)/1000./1000. <<" s";
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std::cout <<std::endl;
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}
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}
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// Dw.Report();
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}
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