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215 lines
8.4 KiB
C++
215 lines
8.4 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./tests/Test_dwf_cg_prec.cc
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Copyright (C) 2015
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Author: Peter Boyle <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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#ifndef HOST_NAME_MAX
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#define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
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#endif
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NAMESPACE_BEGIN(Grid);
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template<class Matrix,class Field>
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class SchurDiagMooeeOperatorParanoid : public SchurOperatorBase<Field> {
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public:
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Matrix &_Mat;
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SchurDiagMooeeOperatorParanoid (Matrix &Mat): _Mat(Mat){};
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virtual void Mpc (const Field &in, Field &out) {
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Field tmp(in.Grid());
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tmp.Checkerboard() = !in.Checkerboard();
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// std::cout <<" Mpc starting"<<std::endl;
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RealD nn = norm2(in); // std::cout <<" Mpc Prior to dslash norm is "<<nn<<std::endl;
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_Mat.Meooe(in,tmp);
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nn = norm2(tmp); //std::cout <<" Mpc Prior to Mooeinv "<<nn<<std::endl;
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_Mat.MooeeInv(tmp,out);
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nn = norm2(out); //std::cout <<" Mpc Prior to dslash norm is "<<nn<<std::endl;
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_Mat.Meooe(out,tmp);
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nn = norm2(tmp); //std::cout <<" Mpc Prior to Mooee "<<nn<<std::endl;
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_Mat.Mooee(in,out);
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nn = norm2(out); //std::cout <<" Mpc Prior to axpy "<<nn<<std::endl;
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axpy(out,-1.0,tmp,out);
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}
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virtual void MpcDag (const Field &in, Field &out){
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Field tmp(in.Grid());
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// std::cout <<" MpcDag starting"<<std::endl;
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RealD nn = norm2(in);// std::cout <<" MpcDag Prior to dslash norm is "<<nn<<std::endl;
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_Mat.MeooeDag(in,tmp);
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_Mat.MooeeInvDag(tmp,out);
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nn = norm2(out);// std::cout <<" MpcDag Prior to dslash norm is "<<nn<<std::endl;
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_Mat.MeooeDag(out,tmp);
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nn = norm2(tmp);// std::cout <<" MpcDag Prior to Mooee "<<nn<<std::endl;
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_Mat.MooeeDag(in,out);
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nn = norm2(out);// std::cout <<" MpcDag Prior to axpy "<<nn<<std::endl;
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axpy(out,-1.0,tmp,out);
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}
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};
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NAMESPACE_END(Grid);
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int main (int argc, char ** argv)
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{
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char hostname[HOST_NAME_MAX+1];
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gethostname(hostname, HOST_NAME_MAX+1);
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std::string host(hostname);
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Grid_init(&argc,&argv);
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const int Ls=12;
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GridCartesian * UGrid = SpaceTimeGrid::makeFourDimGrid(GridDefaultLatt(), GridDefaultSimd(Nd,vComplexD::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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GridCartesian * UGrid_f = SpaceTimeGrid::makeFourDimGrid(GridDefaultLatt(), GridDefaultSimd(Nd,vComplexF::Nsimd()),GridDefaultMpi());
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GridRedBlackCartesian * UrbGrid_f = SpaceTimeGrid::makeFourDimRedBlackGrid(UGrid_f);
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GridCartesian * FGrid_f = SpaceTimeGrid::makeFiveDimGrid(Ls,UGrid_f);
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GridRedBlackCartesian * FrbGrid_f = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,UGrid_f);
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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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GridParallelRNG RNG5(FGrid); RNG5.SeedFixedIntegers(seeds5);
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GridParallelRNG RNG4(UGrid); RNG4.SeedFixedIntegers(seeds4);
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LatticeFermionD src(FGrid); random(RNG5,src);
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LatticeFermionD result(FGrid); result=Zero();
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LatticeGaugeFieldD Umu(UGrid);
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LatticeGaugeFieldF Umu_f(UGrid_f);
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SU<Nc>::HotConfiguration(RNG4,Umu);
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precisionChange(Umu_f,Umu);
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RealD mass=0.1;
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RealD M5=1.8;
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DomainWallFermionD Ddwf(Umu,*FGrid,*FrbGrid,*UGrid,*UrbGrid,mass,M5);
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DomainWallFermionF Ddwf_f(Umu_f,*FGrid_f,*FrbGrid_f,*UGrid_f,*UrbGrid_f,mass,M5);
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LatticeFermionD src_o(FrbGrid);
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LatticeFermionD result_o(FrbGrid);
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LatticeFermionD result_o_2(FrbGrid);
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pickCheckerboard(Odd,src_o,src);
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result_o.Checkerboard() = Odd;
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result_o = Zero();
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result_o_2.Checkerboard() = Odd;
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result_o_2 = Zero();
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SchurDiagMooeeOperatorParanoid<DomainWallFermionD,LatticeFermionD> HermOpEO(Ddwf);
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SchurDiagMooeeOperatorParanoid<DomainWallFermionF,LatticeFermionF> HermOpEO_f(Ddwf_f);
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int nsecs=600;
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if( GridCmdOptionExists(argv,argv+argc,"--seconds") ){
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std::string arg = GridCmdOptionPayload(argv,argv+argc,"--seconds");
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GridCmdOptionInt(arg,nsecs);
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}
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std::cout << GridLogMessage << "::::::::::::: Starting mixed CG for "<<nsecs <<" seconds" << std::endl;
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MixedPrecisionConjugateGradient<LatticeFermionD,LatticeFermionF> mCG(1.0e-8, 10000, 50, FrbGrid_f, HermOpEO_f, HermOpEO);
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double t1,t2,flops;
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double MdagMsiteflops = 1452; // Mobius (real coeffs)
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// CG overhead: 8 inner product, 4+8 axpy_norm, 4+4 linear comb (2 of)
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double CGsiteflops = (8+4+8+4+4)*Nc*Ns ;
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std:: cout << " MdagM site flops = "<< 4*MdagMsiteflops<<std::endl;
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std:: cout << " CG site flops = "<< CGsiteflops <<std::endl;
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int iters;
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time_t start = time(NULL);
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FlightRecorder::ContinueOnFail = 0;
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FlightRecorder::PrintEntireLog = 0;
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FlightRecorder::ChecksumComms = 1;
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FlightRecorder::ChecksumCommsSend=0;
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if(char *s=getenv("GRID_PRINT_ENTIRE_LOG")) FlightRecorder::PrintEntireLog = atoi(s);
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if(char *s=getenv("GRID_CHECKSUM_RECV_BUF")) FlightRecorder::ChecksumComms = atoi(s);
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if(char *s=getenv("GRID_CHECKSUM_SEND_BUF")) FlightRecorder::ChecksumCommsSend = atoi(s);
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int iter=0;
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do {
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if ( iter == 0 ) {
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FlightRecorder::SetLoggingMode(FlightRecorder::LoggingModeRecord);
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} else {
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FlightRecorder::SetLoggingMode(FlightRecorder::LoggingModeVerify);
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}
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std::cerr << "******************* SINGLE PRECISION SOLVE "<<iter<<std::endl;
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result_o = Zero();
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t1=usecond();
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mCG(src_o,result_o);
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t2=usecond();
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iters = mCG.TotalInnerIterations; //Number of inner CG iterations
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flops = MdagMsiteflops*4*FrbGrid->gSites()*iters;
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flops+= CGsiteflops*FrbGrid->gSites()*iters;
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std::cout << " SinglePrecision iterations/sec "<< iters/(t2-t1)*1000.*1000.<<std::endl;
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std::cout << " SinglePrecision GF/s "<< flops/(t2-t1)/1000.<<std::endl;
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std::cout << " SinglePrecision error count "<< FlightRecorder::ErrorCount()<<std::endl;
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assert(FlightRecorder::ErrorCount()==0);
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std::cout << " FlightRecorder is OK! "<<std::endl;
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iter ++;
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} while (time(NULL) < (start + nsecs/10) );
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std::cout << GridLogMessage << "::::::::::::: Starting double precision CG" << std::endl;
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ConjugateGradient<LatticeFermionD> CG(1.0e-8,10000);
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int i=0;
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do {
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if ( i == 0 ) {
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FlightRecorder::SetLoggingMode(FlightRecorder::LoggingModeRecord);
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} else {
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FlightRecorder::SetLoggingMode(FlightRecorder::LoggingModeVerify);
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}
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std::cerr << "******************* DOUBLE PRECISION SOLVE "<<i<<std::endl;
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result_o_2 = Zero();
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t1=usecond();
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CG(HermOpEO,src_o,result_o_2);
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t2=usecond();
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iters = CG.IterationsToComplete;
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flops = MdagMsiteflops*4*FrbGrid->gSites()*iters;
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flops+= CGsiteflops*FrbGrid->gSites()*iters;
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std::cout << " DoublePrecision iterations/sec "<< iters/(t2-t1)*1000.*1000.<<std::endl;
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std::cout << " DoublePrecision GF/s "<< flops/(t2-t1)/1000.<<std::endl;
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std::cout << " DoublePrecision error count "<< FlightRecorder::ErrorCount()<<std::endl;
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assert(FlightRecorder::ErrorCount()==0);
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std::cout << " FlightRecorder is OK! "<<std::endl;
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i++;
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} while (time(NULL) < (start + nsecs) );
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LatticeFermionD diff_o(FrbGrid);
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RealD diff = axpy_norm(diff_o, -1.0, result_o, result_o_2);
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std::cout << GridLogMessage << "::::::::::::: Diff between mixed and regular CG: " << diff << std::endl;
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assert(diff < 1e-4);
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Grid_finalize();
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}
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