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Added ability to pass callback to MADWF that is called every inner iteration and allows user to, for example, adjust the inner solver tolerance depending on residual

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Added a general implementation of the Remez algorithm for producing arbitrary rational polynomial approximation with optional restriction to even/odd polynomials
Added implementation of computation of ZMobius parameters
Added Test_zMADWF_prec to test ZMobius in MADWF
This commit is contained in:
Christopher Kelly
2020-01-17 12:45:30 -08:00
parent 5d834486c9
commit 96671bbb24
7 changed files with 1211 additions and 10 deletions
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33
Grid/qcd/action/fermion/MADWF.h
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@ -40,6 +40,11 @@ inline void convert(const Fieldi &from,Fieldo &to)
to=from;
}
struct MADWFinnerIterCallbackBase{
virtual void operator()(const RealD current_resid){}
virtual ~MADWFinnerIterCallbackBase(){}
};
template<class Matrixo,class Matrixi,class PVinverter,class SchurSolver, class Guesser>
class MADWF
{
@ -56,24 +61,30 @@ class MADWF
RealD target_resid;
int maxiter;
public:
//operator() is called on "callback" at the end of every inner iteration. This allows for example the adjustment of the inner
//tolerance to speed up subsequent iteration
MADWFinnerIterCallbackBase* callback;
public:
MADWF(Matrixo &_Mato,
Matrixi &_Mati,
PVinverter &_PauliVillarsSolvero,
Matrixi &_Mati,
PVinverter &_PauliVillarsSolvero,
SchurSolver &_SchurSolveri,
Guesser & _Guesseri,
RealD resid,
int _maxiter) :
int _maxiter,
MADWFinnerIterCallbackBase* _callback = NULL) :
Mato(_Mato),Mati(_Mati),
SchurSolveri(_SchurSolveri),
PauliVillarsSolvero(_PauliVillarsSolvero),Guesseri(_Guesseri)
{
target_resid=resid;
maxiter =_maxiter;
};
PauliVillarsSolvero(_PauliVillarsSolvero),Guesseri(_Guesseri),
callback(_callback)
{
target_resid=resid;
maxiter =_maxiter;
};
void operator() (const FermionFieldo &src4,FermionFieldo &sol5)
{
std::cout << GridLogMessage<< " ************************************************" << std::endl;
@ -177,6 +188,8 @@ class MADWF
std::cout << GridLogMessage << "Residual " << i << ": " << resid << std::endl;
std::cout << GridLogMessage << "***************************************" <<std::endl;
if(callback != NULL) (*callback)(resid);
if (resid < target_resid) {
return;
}