t_fuzwilp.cc

Go to the documentation of this file.

 
#include <iostream>
#include <cstdio>
#include <time.h>
 
#include "chroma.h"
 
using namespace Chroma;
 
int main(int argc, char *argv[])
{
  // Put the machine into a known state
  Chroma::initialize(&argc, &argv);
 
  // Setup the layout
//    const int foo[] = {4,4,4,4}; 
  const int foo[] = {16,16,16,32}; 
//  const int foo[] = {20,20,20,64}; 
 
  multi1d<int> nrow(Nd);
  nrow = foo;  // Use only Nd elements
  Layout::setLattSize(nrow);
  Layout::create();
 
  XMLFileWriter xml("t_fuzwilp.xml");
  push(xml, "t_fuzwilp");
 
  push(xml,"lattice");
  write(xml,"Nd",Nd);
  write(xml,"Nc",Nc);
  write(xml,"nrow",nrow);
  pop(xml);
 
  //! Example of calling a plaquette routine
  /*! NOTE: the STL is *not* used to hold gauge fields */
  multi1d<LatticeColorMatrix> u(Nd);
  Double w_plaq, s_plaq, t_plaq, link;
 
/*
  QDPIO::cerr << "Start gaussian\n";
  for(int m=0; m < u.size(); ++m)
    gaussian(u[m]);
*/
 
 
 XMLReader gauge_xml;
 std::string gaugeFilename;
 
 gaugeFilename="/raidd/aci/configs/getlat.1200";
// gaugeFilename="/raidd/aci/chromaqdp/chroma/tests/t_asqtad_prop/t_nersc.cfg";
// gaugeFilename="/raidd/aci/configs/u_MILC_2064f21b681m030m050.246";
 
  QDPIO::cout << "Reading config: " << gaugeFilename << std::endl;
   readArchiv(gauge_xml, u, gaugeFilename);
 
  // Reunitarize the gauge field
  for(int m=0; m < u.size(); ++m)
    reunit(u[m]);
 
// Check gauge invariance here if required
//    rgauge(u);
//    QDPIO::cout << "Random gauge transformation for testing " << std::endl;
 
  // Try out the plaquette routine
  QDPIO::cout << "Measure the plaquette and link " << std::endl;
 
  StopWatch swatch;
  swatch.start();
 
  MesPlq(u, w_plaq, s_plaq, t_plaq, link);
 
  swatch.stop();
  double time_in_sec  = swatch.getTimeInSeconds();
 
  QDPIO::cout << "w_plaq = " << w_plaq << std::endl;
  QDPIO::cout << "s_plaq = " << s_plaq << std::endl;
  QDPIO::cout << "t_plaq = " << t_plaq << std::endl;
  QDPIO::cout << "link = " << link << std::endl;
 
  QDPIO::cout << "Measurement took " << time_in_sec 
        << " secs" << std::endl;
 
  // Write out the results
  push(xml,"observables");
  write(xml,"w_plaq",w_plaq);
  write(xml,"w_link",link);
 
 
 
  // Now try calling the fuzzed Wilson loop routine
  QDPIO::cout << "Measure ape-smeared Wilson loops" << std::endl;
  int j_decay = Nd - 1;
 
  Real sm_fact = 2.5;   // typical parameter
  int n_smear = 0;     // number of smearing hits
 
  int BlkMax = 100;    // max iterations in max-ing trace
  Real BlkAccu = 1.0e-5;  // accuracy of max-ing
  int tmax = 3 ; 
 
  QDPIO::cout << "sm_fact: " << sm_fact << std::endl;
  QDPIO::cout << "n_smear: " << n_smear << std::endl;
 
  swatch.reset();
  swatch.start();
 
   fuzwilp(u, j_decay, tmax, n_smear, sm_fact, BlkAccu, BlkMax, xml, 
        "Fuzzed_Wilson_Loops");
 
  swatch.stop();
  time_in_sec  = swatch.getTimeInSeconds();
  QDPIO::cout << "Loop measurements complete" << std::endl;
  QDPIO::cout << "Measurement took " << time_in_sec 
        << " secs" << std::endl;
 
  pop(xml);
  pop(xml);
 
  // Time to bolt
  Chroma::finalize();
 
  exit(0);
}