Benchmark for En Hung

tests/core/Test_fft_prop.cc

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+    /*************************************************************************************
+
+    grid` physics library, www.github.com/paboyle/Grid 
+
+    Source file: ./tests/Test_cshift.cc
+
+    Copyright (C) 2015
+
+Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
+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 Grid;
+
+template<class LatticeObject>
+void bench(GridCartesian *grid, std::string name)
+{
+  LatticeComplexD       C(grid);
+  LatticeComplexD       coor(grid);
+
+  ComplexD ci(0.0,1.0);
+  Coordinate p({1,2,3,4});
+
+  Coordinate latt_size   = grid->_fdimensions;
+  std::cout<<"*************************************************"<<std::endl;
+  std::cout<<" Benchmarking FFT of "<<name<<" on plane wave    "<<std::endl;
+  std::cout<<"*************************************************"<<std::endl;
+  C=Zero();
+  for(int mu=0;mu<4;mu++){
+    RealD TwoPiL =  M_PI * 2.0/ latt_size[mu];
+    LatticeCoordinate(coor,mu);
+    C = C + (TwoPiL * p[mu]) * coor;
+  }
+  C = exp(C*ci);
+
+  LatticeObject S(grid);
+  LatticeObject Stilde(grid);
+
+  S=Zero();
+  S = S+C;
+
+  FFT theFFT(grid);
+
+  Stilde=S;
+  std::cout << " norm2(s) "<<norm2(Stilde)<<std::endl;
+  double tt= -usecond();
+  theFFT.FFT_dim(Stilde,Stilde,0,FFT::forward); std::cout << theFFT.MFlops()<<" mflops "<<norm2(Stilde)<<std::endl;
+  theFFT.FFT_dim(Stilde,Stilde,1,FFT::forward); std::cout << theFFT.MFlops()<<" mflops "<<norm2(Stilde)<<std::endl;
+  theFFT.FFT_dim(Stilde,Stilde,2,FFT::forward); std::cout << theFFT.MFlops()<<" mflops "<<norm2(Stilde)<<std::endl;
+  theFFT.FFT_dim(Stilde,Stilde,3,FFT::forward); std::cout << theFFT.MFlops()<<" mflops "<<norm2(Stilde)<<std::endl;
+  tt+= usecond();
+
+  std::cout<<"*************************************************"<<std::endl;
+  std::cout<<" FFT of "<<latt_size <<" "<<name<<" took "<<tt/1.e6<<" s"<<std::endl;
+  std::cout<<"*************************************************"<<std::endl;
+
+}
+
+
+int main (int argc, char ** argv)
+{
+  Grid_init(&argc,&argv);
+
+  int threads = GridThread::GetThreads();
+  std::cout<<GridLogMessage << "Grid is setup to use "<<threads<<" threads"<<std::endl;
+
+  Coordinate latt_size   = GridDefaultLatt();
+  Coordinate simd_layout = GridDefaultSimd(Nd,vComplexD::Nsimd());
+  Coordinate mpi_layout  = GridDefaultMpi();
+
+  int vol = 1;
+  for(int d=0;d<latt_size.size();d++){
+    vol = vol * latt_size[d];
+  }
+  GridCartesian         GRID(latt_size,simd_layout,mpi_layout);
+
+
+  bench<LatticeComplexD>(&GRID,std::string("LatticeComplexD"));
+  bench<LatticeColourMatrixD>(&GRID,std::string("LatticeColourMatrixD"));
+  bench<LatticePropagatorD>(&GRID,std::string("LatticePropagatorD"));
+  
+  Grid_finalize();
+}