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First cut on generalised HMC

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Backward compatibility OK
This commit is contained in:
Guido Cossu
2016-10-03 15:28:00 +01:00
parent 7ea4b959a4
commit e415260961
7 changed files with 376 additions and 345 deletions
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50
lib/qcd/action/gauge/GaugeImpl.h
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@@ -38,15 +38,19 @@ namespace QCD {
template <class Gimpl> class WilsonLoops; template <class Gimpl> class WilsonLoops;
//
#define INHERIT_GIMPL_TYPES(GImpl) \ #define INHERIT_GIMPL_TYPES(GImpl) \
typedef typename GImpl::Simd Simd; \ typedef typename GImpl::Simd Simd; \
typedef typename GImpl::GaugeLinkField GaugeLinkField; \ typedef typename GImpl::LinkField GaugeLinkField; \
typedef typename GImpl::GaugeField GaugeField; \ typedef typename GImpl::Field GaugeField; \
typedef typename GImpl::SiteGaugeField SiteGaugeField; \ typedef typename GImpl::SiteField SiteGaugeField; \
typedef typename GImpl::SiteGaugeLink SiteGaugeLink; typedef typename GImpl::SiteLink SiteGaugeLink;
// #define INHERIT_FIELD_TYPES(Impl) \
template <class S, int Nrepresentation = Nc> class GaugeImplTypes { typedef typename Impl::Field Field;
template <class S, int Nrepresentation = Nc > class GaugeImplTypes {
public: public:
typedef S Simd; typedef S Simd;
@@ -55,16 +59,14 @@ public:
template <typename vtype> template <typename vtype>
using iImplGaugeField = iVector<iScalar<iMatrix<vtype, Nrepresentation>>, Nd>; using iImplGaugeField = iVector<iScalar<iMatrix<vtype, Nrepresentation>>, Nd>;
typedef iImplGaugeLink<Simd> SiteGaugeLink; typedef iImplGaugeLink<Simd> SiteLink;
typedef iImplGaugeField<Simd> SiteGaugeField; typedef iImplGaugeField<Simd> SiteField;
typedef Lattice<SiteGaugeLink> GaugeLinkField; // bit ugly naming; polarised typedef Lattice<SiteLink> LinkField;
// gauge field, lorentz... all typedef Lattice<SiteField> Field;
// ugly
typedef Lattice<SiteGaugeField> GaugeField;
// Move this elsewhere? FIXME // Move this elsewhere? FIXME
static inline void AddGaugeLink(GaugeField &U, GaugeLinkField &W, static inline void AddLink(Field &U, LinkField &W,
int mu) { // U[mu] += W int mu) { // U[mu] += W
PARALLEL_FOR_LOOP PARALLEL_FOR_LOOP
for (auto ss = 0; ss < U._grid->oSites(); ss++) { for (auto ss = 0; ss < U._grid->oSites(); ss++) {
@@ -72,6 +74,28 @@ public:
U._odata[ss]._internal[mu] + W._odata[ss]._internal; U._odata[ss]._internal[mu] + W._odata[ss]._internal;
} }
} }
static inline void generate_momenta(Field& P, GridParallelRNG& pRNG){
// specific for SU gauge fields
LinkField Pmu(P._grid);
Pmu = zero;
for (int mu = 0; mu < Nd; mu++) {
SU<Nrepresentation>::GaussianFundamentalLieAlgebraMatrix(pRNG, Pmu);
PokeIndex<LorentzIndex>(P, Pmu, mu);
}
}
static inline void update_field(Field& P, Field& U, double ep, unsigned int Nexp){
for (int mu = 0; mu < Nd; mu++) {
auto Umu = PeekIndex<LorentzIndex>(U, mu);
auto Pmu = PeekIndex<LorentzIndex>(P, mu);
Umu = expMat(Pmu, ep, Nexp) * Umu;
PokeIndex<LorentzIndex>(U, ProjectOnGroup(Umu), mu);
}
}
}; };
// Composition with smeared link, bc's etc.. probably need multiple inheritance // Composition with smeared link, bc's etc.. probably need multiple inheritance

38
lib/qcd/hmc/HMC.h
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@@ -60,24 +60,25 @@ struct HMCparameters {
///////////////////////////////// /////////////////////////////////
} }
void print() const { void print_parameters() const {
std::cout << GridLogMessage << "[HMC parameter] Trajectories : " << Trajectories << "\n"; std::cout << GridLogMessage << "[HMC parameters] Trajectories : " << Trajectories << "\n";
std::cout << GridLogMessage << "[HMC parameter] Start trajectory : " << StartTrajectory << "\n"; std::cout << GridLogMessage << "[HMC parameters] Start trajectory : " << StartTrajectory << "\n";
std::cout << GridLogMessage << "[HMC parameter] Metropolis test (on/off): " << MetropolisTest << "\n"; std::cout << GridLogMessage << "[HMC parameters] Metropolis test (on/off): " << MetropolisTest << "\n";
std::cout << GridLogMessage << "[HMC parameter] Thermalization trajs : " << NoMetropolisUntil << "\n"; std::cout << GridLogMessage << "[HMC parameters] Thermalization trajs : " << NoMetropolisUntil << "\n";
} }
}; };
template <class GaugeField> template <class Field>
class HmcObservable { class HmcObservable {
public: public:
virtual void TrajectoryComplete(int traj, GaugeField &U, GridSerialRNG &sRNG, virtual void TrajectoryComplete(int traj, Field &U, GridSerialRNG &sRNG,
GridParallelRNG &pRNG) = 0; GridParallelRNG &pRNG) = 0;
}; };
// this is only defined for a gauge theory
template <class Gimpl> template <class Gimpl>
class PlaquetteLogger : public HmcObservable<typename Gimpl::GaugeField> { class PlaquetteLogger : public HmcObservable<typename Gimpl::Field> {
private: private:
std::string Stem; std::string Stem;
@@ -117,19 +118,19 @@ class PlaquetteLogger : public HmcObservable<typename Gimpl::GaugeField> {
} }
}; };
// template <class GaugeField, class Integrator, class Smearer, class template <class IntegratorType>
// Boundary>
template <class GaugeField, class IntegratorType>
class HybridMonteCarlo { class HybridMonteCarlo {
private: private:
const HMCparameters Params; const HMCparameters Params;
typedef typename IntegratorType::Field Field;
GridSerialRNG &sRNG; // Fixme: need a RNG management strategy. GridSerialRNG &sRNG; // Fixme: need a RNG management strategy.
GridParallelRNG &pRNG; // Fixme: need a RNG management strategy. GridParallelRNG &pRNG; // Fixme: need a RNG management strategy.
GaugeField &Ucur; Field &Ucur;
IntegratorType &TheIntegrator; IntegratorType &TheIntegrator;
std::vector<HmcObservable<GaugeField> *> Observables; std::vector<HmcObservable<Field> *> Observables;
///////////////////////////////////////////////////////// /////////////////////////////////////////////////////////
// Metropolis step // Metropolis step
@@ -164,7 +165,7 @@ class HybridMonteCarlo {
///////////////////////////////////////////////////////// /////////////////////////////////////////////////////////
// Evolution // Evolution
///////////////////////////////////////////////////////// /////////////////////////////////////////////////////////
RealD evolve_step(GaugeField &U) { RealD evolve_step(Field &U) {
TheIntegrator.refresh(U, pRNG); // set U and initialize P and phi's TheIntegrator.refresh(U, pRNG); // set U and initialize P and phi's
RealD H0 = TheIntegrator.S(U); // initial state action RealD H0 = TheIntegrator.S(U); // initial state action
@@ -191,20 +192,21 @@ class HybridMonteCarlo {
// Constructor // Constructor
///////////////////////////////////////// /////////////////////////////////////////
HybridMonteCarlo(HMCparameters Pams, IntegratorType &_Int, HybridMonteCarlo(HMCparameters Pams, IntegratorType &_Int,
GridSerialRNG &_sRNG, GridParallelRNG &_pRNG, GaugeField &_U) GridSerialRNG &_sRNG, GridParallelRNG &_pRNG, Field &_U)
: Params(Pams), TheIntegrator(_Int), sRNG(_sRNG), pRNG(_pRNG), Ucur(_U) {} : Params(Pams), TheIntegrator(_Int), sRNG(_sRNG), pRNG(_pRNG), Ucur(_U) {}
~HybridMonteCarlo(){}; ~HybridMonteCarlo(){};
void AddObservable(HmcObservable<GaugeField> *obs) { void AddObservable(HmcObservable<Field> *obs) {
Observables.push_back(obs); Observables.push_back(obs);
} }
void evolve(void) { void evolve(void) {
Real DeltaH; Real DeltaH;
GaugeField Ucopy(Ucur._grid); Field Ucopy(Ucur._grid);
Params.print(); Params.print_parameters();
TheIntegrator.print_parameters();
// Actual updates (evolve a copy Ucopy then copy back eventually) // Actual updates (evolve a copy Ucopy then copy back eventually)
for (int traj = Params.StartTrajectory; for (int traj = Params.StartTrajectory;

8
lib/qcd/hmc/HmcRunner.h
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@@ -32,6 +32,7 @@ directory
namespace Grid { namespace Grid {
namespace QCD { namespace QCD {
// Class for HMC specific for gauge theories
template <class Gimpl, class RepresentationsPolicy = NoHirep > template <class Gimpl, class RepresentationsPolicy = NoHirep >
class NerscHmcRunnerTemplate { class NerscHmcRunnerTemplate {
public: public:
@@ -114,7 +115,7 @@ class NerscHmcRunnerTemplate {
*/ */
////////////// //////////////
NoSmearing<Gimpl> SmearingPolicy; NoSmearing<Gimpl> SmearingPolicy;
typedef MinimumNorm2<GaugeField, NoSmearing<Gimpl>, RepresentationsPolicy > typedef MinimumNorm2<Gimpl, NoSmearing<Gimpl>, RepresentationsPolicy >
IntegratorType; // change here to change the algorithm IntegratorType; // change here to change the algorithm
IntegratorParameters MDpar(20, 1.0); IntegratorParameters MDpar(20, 1.0);
IntegratorType MDynamics(UGrid, MDpar, TheAction, SmearingPolicy); IntegratorType MDynamics(UGrid, MDpar, TheAction, SmearingPolicy);
@@ -157,10 +158,9 @@ class NerscHmcRunnerTemplate {
// smeared set // smeared set
// notice that the unit configuration is singular in this procedure // notice that the unit configuration is singular in this procedure
std::cout << GridLogMessage << "Filling the smeared set\n"; std::cout << GridLogMessage << "Filling the smeared set\n";
SmearingPolicy.set_GaugeField(U); SmearingPolicy.set_Field(U);
HybridMonteCarlo<GaugeField, IntegratorType> HMC(HMCpar, MDynamics, sRNG, HybridMonteCarlo<IntegratorType> HMC(HMCpar, MDynamics, sRNG, pRNG, U);
pRNG, U);
HMC.AddObservable(&Checkpoint); HMC.AddObservable(&Checkpoint);
HMC.AddObservable(&PlaqLog); HMC.AddObservable(&PlaqLog);

2
lib/qcd/hmc/NerscCheckpointer.h
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@@ -36,7 +36,7 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
namespace Grid{ namespace Grid{
namespace QCD{ namespace QCD{
// Only for gauge fields
template<class Gimpl> template<class Gimpl>
class NerscHmcCheckpointer : public HmcObservable<typename Gimpl::GaugeField> { class NerscHmcCheckpointer : public HmcObservable<typename Gimpl::GaugeField> {
private: private:

101
lib/qcd/hmc/integrators/Integrator.h
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@@ -49,60 +49,53 @@ namespace Grid {
namespace QCD { namespace QCD {
struct IntegratorParameters { struct IntegratorParameters {
int Nexp; unsigned int
int MDsteps; // number of outer steps Nexp; // number of terms in the Taylor expansion of the exponential
unsigned int MDsteps; // number of outer steps
RealD trajL; // trajectory length RealD trajL; // trajectory length
RealD stepsize; RealD stepsize; // trajectory stepsize
IntegratorParameters(int MDsteps_, RealD trajL_ = 1.0, int Nexp_ = 12) IntegratorParameters(int MDsteps_, RealD trajL_ = 1.0,
unsigned int Nexp_ = 12)
: Nexp(Nexp_), : Nexp(Nexp_),
MDsteps(MDsteps_), MDsteps(MDsteps_),
trajL(trajL_), trajL(trajL_),
stepsize(trajL / MDsteps){ stepsize(trajL / MDsteps){
// empty body constructor // empty body constructor
}; };
void print_parameters() {
std::cout << GridLogMessage << "[Integrator] Trajectory length : " << trajL << std::endl;
std::cout << GridLogMessage << "[Integrator] Number of MD steps : " << MDsteps << std::endl;
std::cout << GridLogMessage << "[Integrator] Step size : " << stepsize << std::endl;
std::cout << GridLogMessage << "[Integrator] Exponential approx.: " << Nexp << std::endl;
}
}; };
/*! @brief Class for Molecular Dynamics management */ /*! @brief Class for Molecular Dynamics management */
template <class GaugeField, class SmearingPolicy, class RepresentationPolicy> template <class FieldImplementation, class SmearingPolicy, class RepresentationPolicy>
class Integrator { class Integrator {
protected: protected:
typedef IntegratorParameters ParameterType; typedef IntegratorParameters ParameterType;
typedef typename FieldImplementation::Field MomentaField; //for readability
typedef typename FieldImplementation::Field Field;
IntegratorParameters Params; IntegratorParameters Params;
const ActionSet<GaugeField, RepresentationPolicy> as; const ActionSet<Field, RepresentationPolicy> as;
int levels; // int levels; //
double t_U; // Track time passing on each level and for U and for P double t_U; // Track time passing on each level and for U and for P
std::vector<double> t_P; // std::vector<double> t_P; //
GaugeField P; MomentaField P;
SmearingPolicy& Smearer; SmearingPolicy& Smearer;
RepresentationPolicy Representations; RepresentationPolicy Representations;
// Should match any legal (SU(n)) gauge field void update_P(Field& U, int level, double ep) {
// Need to use this template to match Ncol to pass to SU<N> class
template <int Ncol, class vec>
void generate_momenta(Lattice<iVector<iScalar<iMatrix<vec, Ncol> >, Nd> >& P,
GridParallelRNG& pRNG) {
typedef Lattice<iScalar<iScalar<iMatrix<vec, Ncol> > > > GaugeLinkField;
GaugeLinkField Pmu(P._grid);
Pmu = zero;
for (int mu = 0; mu < Nd; mu++) {
SU<Ncol>::GaussianFundamentalLieAlgebraMatrix(pRNG, Pmu);
PokeIndex<LorentzIndex>(P, Pmu, mu);
}
}
// ObserverList observers; // not yet
// typedef std::vector<Observer*> ObserverList;
// void register_observers();
// void notify_observers();
void update_P(GaugeField& U, int level, double ep) {
t_P[level] += ep; t_P[level] += ep;
update_P(P, U, level, ep); update_P(P, U, level, ep);
@@ -129,12 +122,12 @@ class Integrator {
} }
} update_P_hireps{}; } update_P_hireps{};
void update_P(GaugeField& Mom, GaugeField& U, int level, double ep) { void update_P(MomentaField& Mom, Field& U, int level, double ep) {
// input U actually not used in the fundamental case // input U actually not used in the fundamental case
// Fundamental updates, include smearing // Fundamental updates, include smearing
for (int a = 0; a < as[level].actions.size(); ++a) { for (int a = 0; a < as[level].actions.size(); ++a) {
GaugeField force(U._grid); Field force(U._grid);
GaugeField& Us = Smearer.get_U(as[level].actions.at(a)->is_smeared); Field& Us = Smearer.get_U(as[level].actions.at(a)->is_smeared);
as[level].actions.at(a)->deriv(Us, force); // deriv should NOT include Ta as[level].actions.at(a)->deriv(Us, force); // deriv should NOT include Ta
std::cout << GridLogIntegrator std::cout << GridLogIntegrator
@@ -152,7 +145,7 @@ class Integrator {
as[level].apply(update_P_hireps, Representations, Mom, U, ep); as[level].apply(update_P_hireps, Representations, Mom, U, ep);
} }
void update_U(GaugeField& U, double ep) { void update_U(Field& U, double ep) {
update_U(P, U, ep); update_U(P, U, ep);
t_U += ep; t_U += ep;
@@ -161,26 +154,21 @@ class Integrator {
<< "[" << fl << "] U " << "[" << fl << "] U "
<< " dt " << ep << " : t_U " << t_U << std::endl; << " dt " << ep << " : t_U " << t_U << std::endl;
} }
void update_U(GaugeField& Mom, GaugeField& U, double ep) { void update_U(MomentaField& Mom, Field& U, double ep) {
// rewrite exponential to deal internally with the lorentz index? FieldImplementation::update_field(Mom, U, ep, Params.Nexp);
for (int mu = 0; mu < Nd; mu++) {
auto Umu = PeekIndex<LorentzIndex>(U, mu);
auto Pmu = PeekIndex<LorentzIndex>(Mom, mu);
Umu = expMat(Pmu, ep, Params.Nexp) * Umu;
PokeIndex<LorentzIndex>(U, ProjectOnGroup(Umu), mu);
}
// Update the smeared fields, can be implemented as observer // Update the smeared fields, can be implemented as observer
Smearer.set_GaugeField(U); Smearer.set_Field(U);
// Update the higher representations fields // Update the higher representations fields
Representations.update(U); // void functions if fundamental representation Representations.update(U); // void functions if fundamental representation
} }
virtual void step(GaugeField& U, int level, int first, int last) = 0; virtual void step(Field& U, int level, int first, int last) = 0;
public: public:
Integrator(GridBase* grid, IntegratorParameters Par, Integrator(GridBase* grid, IntegratorParameters Par,
ActionSet<GaugeField, RepresentationPolicy>& Aset, ActionSet<Field, RepresentationPolicy>& Aset,
SmearingPolicy& Sm) SmearingPolicy& Sm)
: Params(Par), : Params(Par),
as(Aset), as(Aset),
@@ -195,6 +183,13 @@ class Integrator {
virtual ~Integrator() {} virtual ~Integrator() {}
virtual std::string integrator_name() = 0;
void print_parameters(){
std::cout << GridLogMessage << "[Integrator] Name : "<< integrator_name() << std::endl;
Params.print_parameters();
}
// to be used by the actionlevel class to iterate // to be used by the actionlevel class to iterate
// over the representations // over the representations
struct _refresh { struct _refresh {
@@ -210,14 +205,14 @@ class Integrator {
} refresh_hireps{}; } refresh_hireps{};
// Initialization of momenta and actions // Initialization of momenta and actions
void refresh(GaugeField& U, GridParallelRNG& pRNG) { void refresh(Field& U, GridParallelRNG& pRNG) {
std::cout << GridLogIntegrator << "Integrator refresh\n"; std::cout << GridLogIntegrator << "Integrator refresh\n";
generate_momenta(P, pRNG); FieldImplementation::generate_momenta(P, pRNG);
// Update the smeared fields, can be implemented as observer // Update the smeared fields, can be implemented as observer
// necessary to keep the fields updated even after a reject // necessary to keep the fields updated even after a reject
// of the Metropolis // of the Metropolis
Smearer.set_GaugeField(U); Smearer.set_Field(U);
// Set the (eventual) representations gauge fields // Set the (eventual) representations gauge fields
Representations.update(U); Representations.update(U);
@@ -228,7 +223,7 @@ class Integrator {
for (int actionID = 0; actionID < as[level].actions.size(); ++actionID) { for (int actionID = 0; actionID < as[level].actions.size(); ++actionID) {
// get gauge field from the SmearingPolicy and // get gauge field from the SmearingPolicy and
// based on the boolean is_smeared in actionID // based on the boolean is_smeared in actionID
GaugeField& Us = Field& Us =
Smearer.get_U(as[level].actions.at(actionID)->is_smeared); Smearer.get_U(as[level].actions.at(actionID)->is_smeared);
as[level].actions.at(actionID)->refresh(Us, pRNG); as[level].actions.at(actionID)->refresh(Us, pRNG);
} }
@@ -256,11 +251,12 @@ class Integrator {
} S_hireps{}; } S_hireps{};
// Calculate action // Calculate action
RealD S(GaugeField& U) { // here also U not used RealD S(Field& U) { // here also U not used
LatticeComplex Hloc(U._grid); LatticeComplex Hloc(U._grid);
Hloc = zero; Hloc = zero;
// Momenta // Momenta --- modify this (take the trace of field)
// momenta_action()
for (int mu = 0; mu < Nd; mu++) { for (int mu = 0; mu < Nd; mu++) {
auto Pmu = PeekIndex<LorentzIndex>(P, mu); auto Pmu = PeekIndex<LorentzIndex>(P, mu);
Hloc -= trace(Pmu * Pmu); Hloc -= trace(Pmu * Pmu);
@@ -276,7 +272,7 @@ class Integrator {
for (int actionID = 0; actionID < as[level].actions.size(); ++actionID) { for (int actionID = 0; actionID < as[level].actions.size(); ++actionID) {
// get gauge field from the SmearingPolicy and // get gauge field from the SmearingPolicy and
// based on the boolean is_smeared in actionID // based on the boolean is_smeared in actionID
GaugeField& Us = Field& Us =
Smearer.get_U(as[level].actions.at(actionID)->is_smeared); Smearer.get_U(as[level].actions.at(actionID)->is_smeared);
Hterm = as[level].actions.at(actionID)->S(Us); Hterm = as[level].actions.at(actionID)->S(Us);
std::cout << GridLogMessage << "S Level " << level << " term " std::cout << GridLogMessage << "S Level " << level << " term "
@@ -289,7 +285,7 @@ class Integrator {
return H; return H;
} }
void integrate(GaugeField& U) { void integrate(Field& U) {
// reset the clocks // reset the clocks
t_U = 0; t_U = 0;
for (int level = 0; level < as.size(); ++level) { for (int level = 0; level < as.size(); ++level) {
@@ -312,7 +308,12 @@ class Integrator {
// and that we indeed got to the end of the trajectory // and that we indeed got to the end of the trajectory
assert(fabs(t_U - Params.trajL) < 1.0e-6); assert(fabs(t_U - Params.trajL) < 1.0e-6);
} }
}; };
} }
} }
#endif // INTEGRATOR_INCLUDED #endif // INTEGRATOR_INCLUDED

254
lib/qcd/hmc/integrators/Integrator_algorithm.h
View File

@@ -1,46 +1,48 @@
/************************************************************************************* /*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid Grid physics library, www.github.com/paboyle/Grid
Source file: ./lib/qcd/hmc/integrators/Integrator_algorithm.h Source file: ./lib/qcd/hmc/integrators/Integrator_algorithm.h
Copyright (C) 2015 Copyright (C) 2015
Author: Peter Boyle <paboyle@ph.ed.ac.uk> Author: Peter Boyle <paboyle@ph.ed.ac.uk>
Author: neo <cossu@post.kek.jp> Author: neo <cossu@post.kek.jp>
This program is free software; you can redistribute it and/or modify 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 it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or the Free Software Foundation; either version 2 of the License, or
(at your option) any later version. (at your option) any later version.
This program is distributed in the hope that it will be useful, This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details. GNU General Public License for more details.
You should have received a copy of the GNU General Public License along 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., with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
See the full license in the file "LICENSE" in the top level distribution directory See the full license in the file "LICENSE" in the top level distribution
*************************************************************************************/ directory
/* END LEGAL */ *************************************************************************************/
/* END LEGAL */
//-------------------------------------------------------------------- //--------------------------------------------------------------------
/*! @file Integrator_algorithm.h /*! @file Integrator_algorithm.h
* @brief Declaration of classes for the Molecular Dynamics algorithms * @brief Declaration of classes for the Molecular Dynamics algorithms
* *
* @author Guido Cossu
*/ */
//-------------------------------------------------------------------- //--------------------------------------------------------------------
#ifndef INTEGRATOR_ALG_INCLUDED #ifndef INTEGRATOR_ALG_INCLUDED
#define INTEGRATOR_ALG_INCLUDED #define INTEGRATOR_ALG_INCLUDED
namespace Grid{ namespace Grid {
namespace QCD{ namespace QCD {
/* PAB: /* PAB:
* *
* Recursive leapfrog; explanation of nested stepping * Recursive leapfrog; explanation of nested stepping
* *
@@ -91,141 +93,146 @@ namespace Grid{
* P 1/2 P 1/2 * P 1/2 P 1/2
*/ */
template<class GaugeField, template <class FieldImplementation, class SmearingPolicy,
class SmearingPolicy, class RepresentationPolicy =
class RepresentationPolicy = Representations< FundamentalRepresentation > > class LeapFrog : Representations<FundamentalRepresentation> >
public Integrator<GaugeField, SmearingPolicy, RepresentationPolicy> { class LeapFrog : public Integrator<FieldImplementation, SmearingPolicy,
RepresentationPolicy> {
public: public:
typedef LeapFrog<FieldImplementation, SmearingPolicy, RepresentationPolicy>
Algorithm;
INHERIT_FIELD_TYPES(FieldImplementation);
typedef LeapFrog<GaugeField, SmearingPolicy, RepresentationPolicy> Algorithm; std::string integrator_name(){return "LeapFrog";}
LeapFrog(GridBase* grid, LeapFrog(GridBase* grid, IntegratorParameters Par,
IntegratorParameters Par, ActionSet<Field, RepresentationPolicy>& Aset, SmearingPolicy& Sm)
ActionSet<GaugeField, RepresentationPolicy> & Aset, : Integrator<FieldImplementation, SmearingPolicy, RepresentationPolicy>(
SmearingPolicy & Sm): grid, Par, Aset, Sm){};
Integrator<GaugeField, SmearingPolicy, RepresentationPolicy>(grid,Par,Aset,Sm) {};
void step(Field& U, int level, int _first, int _last) {
void step (GaugeField& U, int level,int _first, int _last){ int fl = this->as.size() - 1;
int fl = this->as.size() -1;
// level : current level // level : current level
// fl : final level // fl : final level
// eps : current step size // eps : current step size
// Get current level step size // Get current level step size
RealD eps = this->Params.stepsize; RealD eps = this->Params.stepsize;
for(int l=0; l<=level; ++l) eps/= this->as[l].multiplier; for (int l = 0; l <= level; ++l) eps /= this->as[l].multiplier;
int multiplier = this->as[level].multiplier; int multiplier = this->as[level].multiplier;
for(int e=0; e<multiplier; ++e){ for (int e = 0; e < multiplier; ++e) {
int first_step = _first && (e == 0);
int last_step = _last && (e == multiplier - 1);
int first_step = _first && (e==0); if (first_step) { // initial half step
int last_step = _last && (e==multiplier-1); this->update_P(U, level, eps / 2.0);
if(first_step){ // initial half step
this->update_P(U, level,eps/2.0);
} }
if(level == fl){ // lowest level if (level == fl) { // lowest level
this->update_U(U, eps); this->update_U(U, eps);
}else{ // recursive function call } else { // recursive function call
this->step(U, level+1,first_step,last_step); this->step(U, level + 1, first_step, last_step);
} }
int mm = last_step ? 1 : 2; int mm = last_step ? 1 : 2;
this->update_P(U, level,mm*eps/2.0); this->update_P(U, level, mm * eps / 2.0);
} }
} }
}; };
template<class GaugeField, template <class FieldImplementation, class SmearingPolicy,
class SmearingPolicy, class RepresentationPolicy =
class RepresentationPolicy = Representations < FundamentalRepresentation > > class MinimumNorm2 : Representations<FundamentalRepresentation> >
public Integrator<GaugeField, SmearingPolicy, RepresentationPolicy> { class MinimumNorm2 : public Integrator<FieldImplementation, SmearingPolicy,
RepresentationPolicy> {
private: private:
const RealD lambda = 0.1931833275037836; const RealD lambda = 0.1931833275037836;
public: public:
INHERIT_FIELD_TYPES(FieldImplementation);
MinimumNorm2(GridBase* grid, MinimumNorm2(GridBase* grid, IntegratorParameters Par,
IntegratorParameters Par, ActionSet<Field, RepresentationPolicy>& Aset, SmearingPolicy& Sm)
ActionSet<GaugeField, RepresentationPolicy> & Aset, : Integrator<FieldImplementation, SmearingPolicy, RepresentationPolicy>(
SmearingPolicy& Sm): grid, Par, Aset, Sm){};
Integrator<GaugeField, SmearingPolicy, RepresentationPolicy>(grid,Par,Aset,Sm) {};
void step (GaugeField& U, int level, int _first,int _last){ std::string integrator_name(){return "MininumNorm2";}
void step(Field& U, int level, int _first, int _last) {
// level : current level // level : current level
// fl : final level // fl : final level
// eps : current step size // eps : current step size
int fl = this->as.size() -1; int fl = this->as.size() - 1;
RealD eps = this->Params.stepsize*2.0; RealD eps = this->Params.stepsize * 2.0;
for(int l=0; l<=level; ++l) eps/= 2.0*this->as[l].multiplier; for (int l = 0; l <= level; ++l) eps /= 2.0 * this->as[l].multiplier;
// Nesting: 2xupdate_U of size eps/2 // Nesting: 2xupdate_U of size eps/2
// Next level is eps/2/multiplier // Next level is eps/2/multiplier
int multiplier = this->as[level].multiplier; int multiplier = this->as[level].multiplier;
for(int e=0; e<multiplier; ++e){ // steps per step for (int e = 0; e < multiplier; ++e) { // steps per step
int first_step = _first && (e==0); int first_step = _first && (e == 0);
int last_step = _last && (e==multiplier-1); int last_step = _last && (e == multiplier - 1);
if(first_step){ // initial half step if (first_step) { // initial half step
this->update_P(U,level,lambda*eps); this->update_P(U, level, lambda * eps);
} }
if(level == fl){ // lowest level if (level == fl) { // lowest level
this->update_U(U,0.5*eps); this->update_U(U, 0.5 * eps);
}else{ // recursive function call } else { // recursive function call
this->step(U,level+1,first_step,0); this->step(U, level + 1, first_step, 0);
} }
this->update_P(U,level,(1.0-2.0*lambda)*eps); this->update_P(U, level, (1.0 - 2.0 * lambda) * eps);
if(level == fl){ // lowest level if (level == fl) { // lowest level
this->update_U(U,0.5*eps); this->update_U(U, 0.5 * eps);
}else{ // recursive function call } else { // recursive function call
this->step(U,level+1,0,last_step); this->step(U, level + 1, 0, last_step);
} }
int mm = (last_step) ? 1 : 2; int mm = (last_step) ? 1 : 2;
this->update_P(U,level,lambda*eps*mm); this->update_P(U, level, lambda * eps * mm);
} }
} }
}; };
template <class FieldImplementation, class SmearingPolicy,
template<class GaugeField, class RepresentationPolicy =
class SmearingPolicy, Representations<FundamentalRepresentation> >
class RepresentationPolicy = Representations< FundamentalRepresentation > > class ForceGradient : class ForceGradient : public Integrator<FieldImplementation, SmearingPolicy,
public Integrator<GaugeField, SmearingPolicy, RepresentationPolicy> { RepresentationPolicy> {
private: private:
const RealD lambda = 1.0/6.0;; const RealD lambda = 1.0 / 6.0;
const RealD chi = 1.0/72.0; ;
const RealD chi = 1.0 / 72.0;
const RealD xi = 0.0; const RealD xi = 0.0;
const RealD theta = 0.0; const RealD theta = 0.0;
public: public:
INHERIT_FIELD_TYPES(FieldImplementation);
// Looks like dH scales as dt^4. tested wilson/wilson 2 level. // Looks like dH scales as dt^4. tested wilson/wilson 2 level.
ForceGradient(GridBase* grid, ForceGradient(GridBase* grid, IntegratorParameters Par,
IntegratorParameters Par, ActionSet<Field, RepresentationPolicy>& Aset,
ActionSet<GaugeField, RepresentationPolicy> & Aset, SmearingPolicy& Sm)
SmearingPolicy &Sm): : Integrator<FieldImplementation, SmearingPolicy, RepresentationPolicy>(
Integrator<GaugeField, SmearingPolicy, RepresentationPolicy>(grid,Par,Aset, Sm) {}; grid, Par, Aset, Sm){};
std::string integrator_name(){return "ForceGradient";}
void FG_update_P(GaugeField&U, int level,double fg_dt,double ep){ void FG_update_P(Field& U, int level, double fg_dt, double ep) {
GaugeField Ufg(U._grid); Field Ufg(U._grid);
GaugeField Pfg(U._grid); Field Pfg(U._grid);
Ufg = U; Ufg = U;
Pfg = zero; Pfg = zero;
std::cout << GridLogMessage << "FG update "<<fg_dt<<" "<<ep<<std::endl; std::cout << GridLogMessage << "FG update " << fg_dt << " " << ep
<< std::endl;
// prepare_fg; no prediction/result cache for now // prepare_fg; no prediction/result cache for now
// could relax CG stopping conditions for the // could relax CG stopping conditions for the
// derivatives in the small step since the force gets multiplied by // derivatives in the small step since the force gets multiplied by
@@ -234,54 +241,51 @@ namespace Grid{
// Presently 4 force evals, and should have 3, so 1.33x too expensive. // Presently 4 force evals, and should have 3, so 1.33x too expensive.
// could reduce this with sloppy CG to perhaps 1.15x too expensive // could reduce this with sloppy CG to perhaps 1.15x too expensive
// even without prediction. // even without prediction.
this->update_P(Pfg,Ufg,level,1.0); this->update_P(Pfg, Ufg, level, 1.0);
this->update_U(Pfg,Ufg,fg_dt); this->update_U(Pfg, Ufg, fg_dt);
this->update_P(Ufg,level,ep); this->update_P(Ufg, level, ep);
} }
void step (GaugeField& U, int level, int _first,int _last){ void step(Field& U, int level, int _first, int _last) {
RealD eps = this->Params.stepsize * 2.0;
for (int l = 0; l <= level; ++l) eps /= 2.0 * this->as[l].multiplier;
RealD eps = this->Params.stepsize*2.0; RealD Chi = chi * eps * eps * eps;
for(int l=0; l<=level; ++l) eps/= 2.0*this->as[l].multiplier;
RealD Chi = chi*eps*eps*eps; int fl = this->as.size() - 1;
int fl = this->as.size() -1;
int multiplier = this->as[level].multiplier; int multiplier = this->as[level].multiplier;
for(int e=0; e<multiplier; ++e){ // steps per step for (int e = 0; e < multiplier; ++e) { // steps per step
int first_step = _first && (e == 0);
int last_step = _last && (e == multiplier - 1);
int first_step = _first && (e==0); if (first_step) { // initial half step
int last_step = _last && (e==multiplier-1); this->update_P(U, level, lambda * eps);
if(first_step){ // initial half step
this->update_P(U,level,lambda*eps);
} }
if(level == fl){ // lowest level if (level == fl) { // lowest level
this->update_U(U,0.5*eps); this->update_U(U, 0.5 * eps);
}else{ // recursive function call } else { // recursive function call
this->step(U,level+1,first_step,0); this->step(U, level + 1, first_step, 0);
} }
this->FG_update_P(U,level,2*Chi/((1.0-2.0*lambda)*eps),(1.0-2.0*lambda)*eps); this->FG_update_P(U, level, 2 * Chi / ((1.0 - 2.0 * lambda) * eps),
(1.0 - 2.0 * lambda) * eps);
if(level == fl){ // lowest level if (level == fl) { // lowest level
this->update_U(U,0.5*eps); this->update_U(U, 0.5 * eps);
}else{ // recursive function call } else { // recursive function call
this->step(U,level+1,0,last_step); this->step(U, level + 1, 0, last_step);
} }
int mm = (last_step) ? 1 : 2; int mm = (last_step) ? 1 : 2;
this->update_P(U,level,lambda*eps*mm); this->update_P(U, level, lambda * eps * mm);
} }
} }
}; };
}
}
} }
#endif//INTEGRATOR_INCLUDED #endif // INTEGRATOR_INCLUDED

4
lib/qcd/smearing/GaugeConfiguration.h
View File

@@ -21,7 +21,7 @@ public:
NoSmearing(): ThinLinks(NULL) {} NoSmearing(): ThinLinks(NULL) {}
void set_GaugeField(GaugeField& U) { ThinLinks = &U; } void set_Field(GaugeField& U) { ThinLinks = &U; }
void smeared_force(GaugeField& SigmaTilde) const {} void smeared_force(GaugeField& SigmaTilde) const {}
@@ -227,7 +227,7 @@ class SmearedConfiguration {
// attach the smeared routines to the thin links U and fill the smeared set // attach the smeared routines to the thin links U and fill the smeared set
void set_GaugeField(GaugeField& U) { fill_smearedSet(U); } void set_Field(GaugeField& U) { fill_smearedSet(U); }
//==================================================================== //====================================================================
void smeared_force(GaugeField& SigmaTilde) const { void smeared_force(GaugeField& SigmaTilde) const {