mirror of
https://github.com/paboyle/Grid.git
synced 2025-04-25 05:05:56 +01:00
Mixed prec update
This commit is contained in:
Quadro
parent
096bb98f78
commit
4f5ad73501
@ -33,137 +33,8 @@ directory
|
||||
#ifdef GRID_DEFAULT_PRECISION_DOUBLE
|
||||
#define MIXED_PRECISION
|
||||
#endif
|
||||
#include <Grid/qcd/utils/MixedPrecisionOperatorFunction.h>
|
||||
|
||||
NAMESPACE_BEGIN(Grid);
|
||||
|
||||
/*
|
||||
* Need a plan for gauge field update for mixed precision in HMC (2x speed up)
|
||||
* -- Store the single prec action operator.
|
||||
* -- Clone the gauge field from the operator function argument.
|
||||
* -- Build the mixed precision operator dynamically from the passed operator and single prec clone.
|
||||
*/
|
||||
|
||||
template<class FermionOperatorD, class FermionOperatorF, class SchurOperatorD, class SchurOperatorF>
|
||||
class MixedPrecisionConjugateGradientOperatorFunction : public OperatorFunction<typename FermionOperatorD::FermionField> {
|
||||
public:
|
||||
typedef typename FermionOperatorD::FermionField FieldD;
|
||||
typedef typename FermionOperatorF::FermionField FieldF;
|
||||
|
||||
using OperatorFunction<FieldD>::operator();
|
||||
|
||||
RealD Tolerance;
|
||||
RealD InnerTolerance; //Initial tolerance for inner CG. Defaults to Tolerance but can be changed
|
||||
Integer MaxInnerIterations;
|
||||
Integer MaxOuterIterations;
|
||||
GridBase* SinglePrecGrid4; //Grid for single-precision fields
|
||||
GridBase* SinglePrecGrid5; //Grid for single-precision fields
|
||||
RealD OuterLoopNormMult; //Stop the outer loop and move to a final double prec solve when the residual is OuterLoopNormMult * Tolerance
|
||||
|
||||
FermionOperatorF &FermOpF;
|
||||
FermionOperatorD &FermOpD;;
|
||||
SchurOperatorF &LinOpF;
|
||||
SchurOperatorD &LinOpD;
|
||||
|
||||
Integer TotalInnerIterations; //Number of inner CG iterations
|
||||
Integer TotalOuterIterations; //Number of restarts
|
||||
Integer TotalFinalStepIterations; //Number of CG iterations in final patch-up step
|
||||
|
||||
MixedPrecisionConjugateGradientOperatorFunction(RealD tol,
|
||||
Integer maxinnerit,
|
||||
Integer maxouterit,
|
||||
GridBase* _sp_grid4,
|
||||
GridBase* _sp_grid5,
|
||||
FermionOperatorF &_FermOpF,
|
||||
FermionOperatorD &_FermOpD,
|
||||
SchurOperatorF &_LinOpF,
|
||||
SchurOperatorD &_LinOpD):
|
||||
LinOpF(_LinOpF),
|
||||
LinOpD(_LinOpD),
|
||||
FermOpF(_FermOpF),
|
||||
FermOpD(_FermOpD),
|
||||
Tolerance(tol),
|
||||
InnerTolerance(tol),
|
||||
MaxInnerIterations(maxinnerit),
|
||||
MaxOuterIterations(maxouterit),
|
||||
SinglePrecGrid4(_sp_grid4),
|
||||
SinglePrecGrid5(_sp_grid5),
|
||||
OuterLoopNormMult(100.)
|
||||
{
|
||||
/* Debugging instances of objects; references are stored
|
||||
std::cout << GridLogMessage << " Mixed precision CG wrapper LinOpF " <<std::hex<< &LinOpF<<std::dec <<std::endl;
|
||||
std::cout << GridLogMessage << " Mixed precision CG wrapper LinOpD " <<std::hex<< &LinOpD<<std::dec <<std::endl;
|
||||
std::cout << GridLogMessage << " Mixed precision CG wrapper FermOpF " <<std::hex<< &FermOpF<<std::dec <<std::endl;
|
||||
std::cout << GridLogMessage << " Mixed precision CG wrapper FermOpD " <<std::hex<< &FermOpD<<std::dec <<std::endl;
|
||||
*/
|
||||
};
|
||||
|
||||
void operator()(LinearOperatorBase<FieldD> &LinOpU, const FieldD &src, FieldD &psi) {
|
||||
|
||||
std::cout << GridLogMessage << " Mixed precision CG wrapper operator() "<<std::endl;
|
||||
|
||||
SchurOperatorD * SchurOpU = static_cast<SchurOperatorD *>(&LinOpU);
|
||||
|
||||
// std::cout << GridLogMessage << " Mixed precision CG wrapper operator() FermOpU " <<std::hex<< &(SchurOpU->_Mat)<<std::dec <<std::endl;
|
||||
// std::cout << GridLogMessage << " Mixed precision CG wrapper operator() FermOpD " <<std::hex<< &(LinOpD._Mat) <<std::dec <<std::endl;
|
||||
// Assumption made in code to extract gauge field
|
||||
// We could avoid storing LinopD reference alltogether ?
|
||||
assert(&(SchurOpU->_Mat)==&(LinOpD._Mat));
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////////
|
||||
// Must snarf a single precision copy of the gauge field in Linop_d argument
|
||||
////////////////////////////////////////////////////////////////////////////////////
|
||||
typedef typename FermionOperatorF::GaugeField GaugeFieldF;
|
||||
typedef typename FermionOperatorF::GaugeLinkField GaugeLinkFieldF;
|
||||
typedef typename FermionOperatorD::GaugeField GaugeFieldD;
|
||||
typedef typename FermionOperatorD::GaugeLinkField GaugeLinkFieldD;
|
||||
|
||||
GridBase * GridPtrF = SinglePrecGrid4;
|
||||
GridBase * GridPtrD = FermOpD.Umu.Grid();
|
||||
GaugeFieldF U_f (GridPtrF);
|
||||
GaugeLinkFieldF Umu_f(GridPtrF);
|
||||
// std::cout << " Dim gauge field "<<GridPtrF->Nd()<<std::endl; // 4d
|
||||
// std::cout << " Dim gauge field "<<GridPtrD->Nd()<<std::endl; // 4d
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////////
|
||||
// Moving this to a Clone method of fermion operator would allow to duplicate the
|
||||
// physics parameters and decrease gauge field copies
|
||||
////////////////////////////////////////////////////////////////////////////////////
|
||||
GaugeLinkFieldD Umu_d(GridPtrD);
|
||||
for(int mu=0;mu<Nd*2;mu++){
|
||||
Umu_d = PeekIndex<LorentzIndex>(FermOpD.Umu, mu);
|
||||
precisionChange(Umu_f,Umu_d);
|
||||
PokeIndex<LorentzIndex>(FermOpF.Umu, Umu_f, mu);
|
||||
}
|
||||
pickCheckerboard(Even,FermOpF.UmuEven,FermOpF.Umu);
|
||||
pickCheckerboard(Odd ,FermOpF.UmuOdd ,FermOpF.Umu);
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////////
|
||||
// Could test to make sure that LinOpF and LinOpD agree to single prec?
|
||||
////////////////////////////////////////////////////////////////////////////////////
|
||||
/*
|
||||
GridBase *Fgrid = psi._grid;
|
||||
FieldD tmp2(Fgrid);
|
||||
FieldD tmp1(Fgrid);
|
||||
LinOpU.Op(src,tmp1);
|
||||
LinOpD.Op(src,tmp2);
|
||||
std::cout << " Double gauge field "<< norm2(FermOpD.Umu)<<std::endl;
|
||||
std::cout << " Single gauge field "<< norm2(FermOpF.Umu)<<std::endl;
|
||||
std::cout << " Test of operators "<<norm2(tmp1)<<std::endl;
|
||||
std::cout << " Test of operators "<<norm2(tmp2)<<std::endl;
|
||||
tmp1=tmp1-tmp2;
|
||||
std::cout << " Test of operators diff "<<norm2(tmp1)<<std::endl;
|
||||
*/
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////////
|
||||
// Make a mixed precision conjugate gradient
|
||||
////////////////////////////////////////////////////////////////////////////////////
|
||||
MixedPrecisionConjugateGradient<FieldD,FieldF> MPCG(Tolerance,MaxInnerIterations,MaxOuterIterations,SinglePrecGrid5,LinOpF,LinOpD);
|
||||
std::cout << GridLogMessage << "Calling mixed precision Conjugate Gradient" <<std::endl;
|
||||
MPCG(src,psi);
|
||||
}
|
||||
};
|
||||
|
||||
NAMESPACE_END(Grid);
|
||||
|
||||
int main(int argc, char **argv) {
|
||||
using namespace Grid;
|
||||
@ -302,40 +173,37 @@ int main(int argc, char **argv) {
|
||||
ConjugateGradient<FermionField> DerivativeCG(DerivativeStoppingCondition,MaxCGIterations);
|
||||
#ifdef MIXED_PRECISION
|
||||
const int MX_inner = 1000;
|
||||
const RealD MX_tol = 1.0e-6;
|
||||
// Mixed precision EOFA
|
||||
LinearOperatorEOFAD Strange_LinOp_L (Strange_Op_L);
|
||||
LinearOperatorEOFAD Strange_LinOp_R (Strange_Op_R);
|
||||
LinearOperatorEOFAF Strange_LinOp_LF(Strange_Op_LF);
|
||||
LinearOperatorEOFAF Strange_LinOp_RF(Strange_Op_RF);
|
||||
|
||||
MxPCG_EOFA ActionCGL(ActionStoppingCondition,
|
||||
MxPCG_EOFA ActionCGL(ActionStoppingCondition,MX_tol,
|
||||
MX_inner,
|
||||
MaxCGIterations,
|
||||
GridPtrF,
|
||||
FrbGridF,
|
||||
Strange_Op_LF,Strange_Op_L,
|
||||
Strange_LinOp_LF,Strange_LinOp_L);
|
||||
|
||||
MxPCG_EOFA DerivativeCGL(DerivativeStoppingCondition,
|
||||
MxPCG_EOFA DerivativeCGL(DerivativeStoppingCondition,MX_tol,
|
||||
MX_inner,
|
||||
MaxCGIterations,
|
||||
GridPtrF,
|
||||
FrbGridF,
|
||||
Strange_Op_LF,Strange_Op_L,
|
||||
Strange_LinOp_LF,Strange_LinOp_L);
|
||||
|
||||
MxPCG_EOFA ActionCGR(ActionStoppingCondition,
|
||||
MxPCG_EOFA ActionCGR(ActionStoppingCondition,MX_tol,
|
||||
MX_inner,
|
||||
MaxCGIterations,
|
||||
GridPtrF,
|
||||
FrbGridF,
|
||||
Strange_Op_RF,Strange_Op_R,
|
||||
Strange_LinOp_RF,Strange_LinOp_R);
|
||||
|
||||
MxPCG_EOFA DerivativeCGR(DerivativeStoppingCondition,
|
||||
MxPCG_EOFA DerivativeCGR(DerivativeStoppingCondition,MX_tol,
|
||||
MX_inner,
|
||||
MaxCGIterations,
|
||||
GridPtrF,
|
||||
FrbGridF,
|
||||
Strange_Op_RF,Strange_Op_R,
|
||||
Strange_LinOp_RF,Strange_LinOp_R);
|
||||
@ -401,18 +269,16 @@ int main(int argc, char **argv) {
|
||||
LinOpD.push_back(new LinearOperatorD(*Denominators[h]));
|
||||
LinOpF.push_back(new LinearOperatorF(*DenominatorsF[h]));
|
||||
|
||||
MPCG.push_back(new MxPCG(DerivativeStoppingCondition,
|
||||
MPCG.push_back(new MxPCG(DerivativeStoppingCondition,MX_tol,
|
||||
MX_inner,
|
||||
MaxCGIterations,
|
||||
GridPtrF,
|
||||
FrbGridF,
|
||||
*DenominatorsF[h],*Denominators[h],
|
||||
*LinOpF[h], *LinOpD[h]) );
|
||||
|
||||
ActionMPCG.push_back(new MxPCG(ActionStoppingCondition,
|
||||
ActionMPCG.push_back(new MxPCG(ActionStoppingCondition,MX_tol,
|
||||
MX_inner,
|
||||
MaxCGIterations,
|
||||
GridPtrF,
|
||||
FrbGridF,
|
||||
*DenominatorsF[h],*Denominators[h],
|
||||
*LinOpF[h], *LinOpD[h]) );
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user