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Small change in the HMC interface.

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Example of multiple levels in the WilsonFermion hmc test.

Merge remote-tracking branch 'upstream/master'

Conflicts:
	lib/qcd/hmc/HMC.h
	lib/qcd/hmc/integrators/Integrator.h
	lib/qcd/hmc/integrators/Integrator_algorithm.h
	tests/Test_simd.cc
This commit is contained in:
neo
2015-07-30 17:16:04 +09:00
parent 5fc6af1c77 4fe110bd07
commit 490009745c
100 changed files with 16360 additions and 1284 deletions
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58
lib/qcd/hmc/HMC.h
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@@ -3,7 +3,7 @@
* @brief Classes for Hybrid Monte Carlo update
*
* @author Guido Cossu
* Time-stamp: <2015-07-07 14:58:13 neo>
* Time-stamp: <2015-07-30 16:58:26 neo>
*/
//--------------------------------------------------------------------
#ifndef HMC_INCLUDED
@@ -28,75 +28,89 @@ namespace Grid{
template <class Algorithm>
class HybridMonteCarlo{
const HMCparameters Params;
GridSerialRNG sRNG;
GridSerialRNG sRNG; // Fixme: need a RNG management strategy.
Integrator<Algorithm>& MD;
/////////////////////////////////////////////////////////
// Metropolis step
/////////////////////////////////////////////////////////
bool metropolis_test(const RealD DeltaH){
RealD rn_test;
RealD prob = std::exp(-DeltaH);
random(sRNG,rn_test);
std::cout<< "--------------------------------------------\n";
std::cout<< "dH = "<<DeltaH << " Random = "<< rn_test
<< "\nAcc. Probability = " << ((prob<1.0)? prob: 1.0)<< " ";
std::cout<<GridLogMessage<< "--------------------------------------------\n";
std::cout<<GridLogMessage<< "dH = "<<DeltaH << " Random = "<< rn_test <<"\n";
std::cout<<GridLogMessage<< "Acc. Probability = " << ((prob<1.0)? prob: 1.0)<< " ";
if((prob >1.0) || (rn_test <= prob)){ // accepted
std::cout <<"-- ACCEPTED\n";
std::cout<<GridLogMessage <<"-- ACCEPTED\n";
return true;
} else { // rejected
std::cout <<"-- REJECTED\n";
std::cout<<GridLogMessage <<"-- REJECTED\n";
return false;
}
}
/////////////////////////////////////////////////////////
// Evolution
/////////////////////////////////////////////////////////
RealD evolve_step(LatticeGaugeField& U){
MD.init(U); // set U and initialize P and phi's
RealD H0 = MD.S(U); // initial state action
std::cout<<"Total H before = "<< H0 << "\n";
std::cout<<GridLogMessage<<"Total H before = "<< H0 << "\n";
MD.integrate(U);
RealD H1 = MD.S(U); // updated state action
std::cout<<"Total H after = "<< H1 << "\n";
std::cout<<GridLogMessage<<"Total H after = "<< H1 << "\n";
return (H1-H0);
}
public:
HybridMonteCarlo(HMCparameters Pms,
Integrator<Algorithm>& MolDyn):
Params(Pms),MD(MolDyn){
//FIXME
// initialize RNGs also with seed
/////////////////////////////////////////
// Constructor
/////////////////////////////////////////
HybridMonteCarlo(HMCparameters Pms, Integrator<Algorithm>& MolDyn): Params(Pms),MD(MolDyn) {
//FIXME... initialize RNGs also with seed ; RNG management strategy
sRNG.SeedRandomDevice();
}
~HybridMonteCarlo(){};
void evolve(LatticeGaugeField& Uin){
Real DeltaH;
// Thermalizations
for(int iter=1; iter <= Params.ThermalizationSteps; ++iter){
std::cout << "-- # Thermalization step = "<< iter << "\n";
std::cout<<GridLogMessage << "-- # Thermalization step = "<< iter << "\n";
DeltaH = evolve_step(Uin);
std::cout<< " dH = "<< DeltaH << "\n";
std::cout<<GridLogMessage<< "dH = "<< DeltaH << "\n";
}
// Actual updates (evolve a copy Ucopy then copy back eventually)
LatticeGaugeField Ucopy(Uin._grid);
for(int iter=Params.StartingConfig;
iter < Params.Nsweeps+Params.StartingConfig; ++iter){
std::cout << "-- # Sweep = "<< iter << "\n";
std::cout<<GridLogMessage << "-- # Sweep = "<< iter << "\n";
Ucopy = Uin;
DeltaH = evolve_step(Ucopy);
if(metropolis_test(DeltaH)) Uin = Ucopy;
// here save config and RNG seed
}
}
};