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Grid/lib/qcd/hmc/HmcRunner.h

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#ifndef HMC_RUNNER
#define HMC_RUNNER
namespace Grid{
namespace QCD{
class NerscHmcRunner {
public:
enum StartType_t { ColdStart, HotStart, TepidStart, CheckpointStart };
ActionSet<LatticeGaugeField> TheAction;
GridCartesian * UGrid ;
GridCartesian * FGrid ;
GridRedBlackCartesian * UrbGrid ;
GridRedBlackCartesian * FrbGrid ;
virtual void BuildTheAction (int argc, char **argv) = 0;
void Run (int argc, char **argv){
StartType_t StartType = HotStart;
std::string arg;
if( GridCmdOptionExists(argv,argv+argc,"--StartType") ){
arg = GridCmdOptionPayload(argv,argv+argc,"--StartType");
if ( arg == "HotStart" ) { StartType = HotStart; }
else if ( arg == "ColdStart" ) { StartType = ColdStart; }
else if ( arg == "TepidStart" ) { StartType = TepidStart; }
else if ( arg == "CheckpointStart" ) { StartType = CheckpointStart; }
else assert(0);
}
int StartTraj = 0;
if( GridCmdOptionExists(argv,argv+argc,"--StartTrajectory") ){
arg= GridCmdOptionPayload(argv,argv+argc,"--StartTrajectory");
std::vector<int> ivec(0);
GridCmdOptionIntVector(arg,ivec);
StartTraj = ivec[0];
}
int NumTraj = 1;
if( GridCmdOptionExists(argv,argv+argc,"--Trajectories") ){
arg= GridCmdOptionPayload(argv,argv+argc,"--Trajectories");
std::vector<int> ivec(0);
GridCmdOptionIntVector(arg,ivec);
NumTraj = ivec[0];
}
// Create integrator
typedef MinimumNorm2<LatticeGaugeField> IntegratorType;// change here to change the algorithm
IntegratorParameters MDpar(20);
IntegratorType MDynamics(UGrid,MDpar, TheAction);
// Checkpoint strategy
NerscHmcCheckpointer<LatticeGaugeField> Checkpoint(std::string("ckpoint_lat"),std::string("ckpoint_rng"),1);
PlaquetteLogger<LatticeGaugeField> PlaqLog(std::string("plaq"));
HMCparameters HMCpar;
HMCpar.StartTrajectory = StartTraj;
HMCpar.Trajectories = NumTraj;
GridSerialRNG sRNG;
GridParallelRNG pRNG(UGrid);
LatticeGaugeField U(UGrid);
std::vector<int> SerSeed({1,2,3,4,5});
std::vector<int> ParSeed({6,7,8,9,10});
if ( StartType == HotStart ) {
// Hot start
HMCpar.NoMetropolisUntil =0;
HMCpar.MetropolisTest = true;
sRNG.SeedFixedIntegers(SerSeed);
pRNG.SeedFixedIntegers(ParSeed);
SU3::HotConfiguration(pRNG, U);
} else if ( StartType == ColdStart ) {
// Cold start
HMCpar.NoMetropolisUntil =0;
HMCpar.MetropolisTest = true;
sRNG.SeedFixedIntegers(SerSeed);
pRNG.SeedFixedIntegers(ParSeed);
SU3::ColdConfiguration(pRNG, U);
} else if ( StartType == TepidStart ) {
// Tepid start
HMCpar.NoMetropolisUntil =0;
HMCpar.MetropolisTest = true;
sRNG.SeedFixedIntegers(SerSeed);
pRNG.SeedFixedIntegers(ParSeed);
SU3::TepidConfiguration(pRNG, U);
} else if ( StartType == CheckpointStart ) {
HMCpar.NoMetropolisUntil =0;
HMCpar.MetropolisTest = true;
// CheckpointRestart
Checkpoint.CheckpointRestore(StartTraj, U, sRNG, pRNG);
}
HybridMonteCarlo<LatticeGaugeField,IntegratorType> HMC(HMCpar, MDynamics,sRNG,pRNG,U);
HMC.AddObservable(&Checkpoint);
HMC.AddObservable(&PlaqLog);
// Run it
HMC.evolve();
}
};
}}
#endif