RooFit::TestStatistics::LikelihoodSerial Class Reference

Serial likelihood calculation strategy implementation.

This class serves as a baseline reference implementation of the LikelihoodWrapper. It reimplements the previous RooNLLVar "BulkPartition" single CPU strategy in the new RooFit::TestStatistics framework.

Note

The class is not intended for use by end-users. We recommend to either use RooMinimizer with a RooAbsL derived likelihood object, or to use a higher level entry point like RooAbsPdf::fitTo() or RooAbsPdf::createNLL().

Definition at line 26 of file LikelihoodSerial.h.

Public Member Functions
	LikelihoodSerial (std::shared_ptr< RooAbsL > likelihood, std::shared_ptr< WrapperCalculationCleanFlags > calculation_is_clean)
LikelihoodSerial *	clone () const override
void	evaluate () override
	Triggers (possibly asynchronous) evaluation of the likelihood.
ROOT::Math::KahanSum< double >	getResult () const override
	Return the latest result of a likelihood evaluation.
void	initVars ()
	Helper function for the constructor.
Public Member Functions inherited from RooFit::TestStatistics::LikelihoodWrapper
	LikelihoodWrapper (std::shared_ptr< RooAbsL > likelihood, std::shared_ptr< WrapperCalculationCleanFlags > calculation_is_clean)
virtual	~LikelihoodWrapper ()=default
void	constOptimizeTestStatistic (RooAbsArg::ConstOpCode opcode, bool doAlsoTrackingOpt)
double	defaultErrorLevel () const
virtual void	enableOffsetting (bool flag)
virtual std::string	GetName () const
virtual std::string	GetTitle () const
virtual bool	isOffsetting () const
ROOT::Math::KahanSum< double >	offset () const
void	setApplyWeightSquared (bool flag)
void	setOffsettingMode (OffsettingMode mode)
virtual void	synchronizeParameterSettings (const std::vector< ROOT::Fit::ParameterSettings > &parameter_settings)
virtual void	synchronizeWithMinimizer (const ROOT::Math::MinimizerOptions &options)
	Synchronize minimizer settings with calculators in child classes.
virtual void	updateMinuitExternalParameterValues (const std::vector< double > &minuit_external_x)
virtual void	updateMinuitInternalParameterValues (const std::vector< double > &minuit_internal_x)
	Minuit passes in parameter values that may not conform to RooFit internal standards (like applying range clipping), but that the specific calculator does need.

Private Attributes
RooArgList	_saveVars
	Copy of variables.
RooArgList	_vars
	Variables.
LikelihoodType	likelihood_type
ROOT::Math::KahanSum< double >	result

Additional Inherited Members
Static Public Member Functions inherited from RooFit::TestStatistics::LikelihoodWrapper
static std::unique_ptr< LikelihoodWrapper >	create (LikelihoodMode likelihoodMode, std::shared_ptr< RooAbsL > likelihood, std::shared_ptr< WrapperCalculationCleanFlags > calculationIsClean)
	Factory method.
Protected Member Functions inherited from RooFit::TestStatistics::LikelihoodWrapper
ROOT::Math::KahanSum< double >	applyOffsetting (ROOT::Math::KahanSum< double > current_value)
void	swapOffsets ()
	When calculating an unbinned likelihood with square weights applied, a different offset is necessary.
Protected Attributes inherited from RooFit::TestStatistics::LikelihoodWrapper
std::shared_ptr< WrapperCalculationCleanFlags >	calculation_is_clean_
bool	do_offset_ = false
std::shared_ptr< RooAbsL >	likelihood_
ROOT::Math::KahanSum< double >	offset_
ROOT::Math::KahanSum< double >	offset_save_ {0.}
	!
OffsettingMode	offsetting_mode_ = OffsettingMode::legacy

#include </home/sftnight/build/workspace/root-makedoc-master/rootspi/rdoc/src/master/roofit/roofitcore/src/TestStatistics/LikelihoodSerial.h>

Inheritance diagram for RooFit::TestStatistics::LikelihoodSerial:

Constructor & Destructor Documentation

LikelihoodSerial()

RooFit::TestStatistics::LikelihoodSerial::LikelihoodSerial	(	std::shared_ptr< RooAbsL >	likelihood,
		std::shared_ptr< WrapperCalculationCleanFlags >	calculation_is_clean
	)

Definition at line 35 of file LikelihoodSerial.cxx.

Member Function Documentation

clone()

LikelihoodSerial * RooFit::TestStatistics::LikelihoodSerial::clone ( ) const

inlineoverridevirtual

Implements RooFit::TestStatistics::LikelihoodWrapper.

Definition at line 30 of file LikelihoodSerial.h.

evaluate()

void RooFit::TestStatistics::LikelihoodSerial::evaluate ( )

overridevirtual

Triggers (possibly asynchronous) evaluation of the likelihood.

In parallel strategies, it may be advantageous to allow a calling process to continue on with other tasks while the calculation is offloaded to another process or device, like a GPU. For this reason, evaluate() does not return the result, this is done in getResult().

Implements RooFit::TestStatistics::LikelihoodWrapper.

Definition at line 79 of file LikelihoodSerial.cxx.

getResult()

ROOT::Math::KahanSum< double > RooFit::TestStatistics::LikelihoodSerial::getResult ( ) const

inlineoverridevirtual

Return the latest result of a likelihood evaluation.

Returns the result that was stored after calling evaluate(). It is up to the implementer to make sure the stored value represents the most recent evaluation call, e.g. by using a mutex.

Implements RooFit::TestStatistics::LikelihoodWrapper.

Definition at line 35 of file LikelihoodSerial.h.

initVars()

void RooFit::TestStatistics::LikelihoodSerial::initVars

(

)

Helper function for the constructor.

This is a separate function (instead of just in ctor) for historical reasons. Its predecessor RooRealMPFE::initVars() was used from multiple ctors, but also from RooRealMPFE::constOptimizeTestStatistic at the end, which makes sense, because it might change the set of variables. We may at some point want to do this here as well.

Definition at line 63 of file LikelihoodSerial.cxx.

Member Data Documentation

_saveVars

RooArgList RooFit::TestStatistics::LikelihoodSerial::_saveVars

private

Copy of variables.

Definition at line 41 of file LikelihoodSerial.h.

_vars

RooArgList RooFit::TestStatistics::LikelihoodSerial::_vars

private

Variables.

Definition at line 40 of file LikelihoodSerial.h.

likelihood_type

LikelihoodType RooFit::TestStatistics::LikelihoodSerial::likelihood_type

private

Definition at line 43 of file LikelihoodSerial.h.

result

ROOT::Math::KahanSum<double> RooFit::TestStatistics::LikelihoodSerial::result

private

Definition at line 38 of file LikelihoodSerial.h.