#include <LikelihoodCalculatorMPI.h>

Inheritance diagram for LikelihoodCalculatorMPI:

Collaboration diagram for LikelihoodCalculatorMPI:

Public Types
enum	{ kFirstId = MPITag::kMaxTags }

Public Member Functions
	LikelihoodCalculatorMPI (const IntensityManager &intenManager, const NormIntInterface &normInt, DataReader dataReaderSignal, DataReader dataReaderBkgnd, ParameterManagerMPI &parManager)

	~LikelihoodCalculatorMPI ()

double	operator() ()

Public Member Functions inherited from LikelihoodCalculator
	LikelihoodCalculator (const IntensityManager &intenManager, const NormIntInterface &normInt, DataReader dataReaderSignal, DataReader dataReaderBkgnd, const ParameterManager &parManager)

virtual	~LikelihoodCalculator ()

string	reactionName () const

Public Member Functions inherited from MIFunctionContribution
	MIFunctionContribution (MinuitMinimizationManager *)

virtual	~MIFunctionContribution ()

virtual double	derivative (const MinuitParameter &par)

virtual void	update (const MISubject *)

virtual double	contribution ()

void	stopContributing ()

void	restartContributing ()

bool	contributing () const

Public Member Functions inherited from MIObserver
	MIObserver ()

virtual	~MIObserver ()

Friends
class	LikelihoodManagerMPI

Additional Inherited Members
Static Public Attributes inherited from MIFunctionContribution
static const double	kUnknownDerivative = -54321

Protected Member Functions inherited from LikelihoodCalculator
double	dataTerm ()

double	normIntTerm ()

double	sumBkgWeights () const

double	numBkgEvents () const

double	numDataEvents () const

void	setSumBkgWeights (double sum)

void	setNumBkgEvents (double num)

void	setNumDataEvents (double num)

Detailed Description

This class is implements the parallel likelihood calculation in the MPI enviornment. The general idea is that MPI communications are confined to this class, which utilizes the base class for doing the actual computation. This avoids replication of likelihood computation in this class and confines MPI impliementation to just the methods in this class.

Definition at line 57 of file LikelihoodCalculatorMPI.h.

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

This enum allows multiple instances of the likelihoodCalculatorMPI to synchronize themselves across many processes. One instance of the likelihoodCalculatorMPI is created for every reaction in the fit. The code uses the MPI tags to send commands (via LikelihoodManagerMPI) to each instance. Therefore the instance numbering starts with the first tag available after the commands listed in MPITags.

Enumerator
kFirstId

Definition at line 73 of file LikelihoodCalculatorMPI.h.

Constructor & Destructor Documentation

◆ LikelihoodCalculatorMPI()

LikelihoodCalculatorMPI::LikelihoodCalculatorMPI	(	const IntensityManager &	intenManager,
		const NormIntInterface &	normInt,
		DataReader *	dataReaderSignal,
		DataReader *	dataReaderBkgnd,
		ParameterManagerMPI &	parManager
	)

This is the constructor. On all nodes setupMPI() is called first to define the rank and number of processes. On the woker nodes, each instance of LikelihoodCalulatorMPI registers itself with the LikelihoodManagerMPI. Each instance on the worker nodes has a unique ID which is derived from the cuerrent value of the static member data m_idCounter.

Arguments to this constructor are similar to those for LikelihoodCalculator. This helps to maintain a familar interface for the user.

Parameters

[in]	ampManager	A reference to the amplitude manager that this likelihood calculator should use for amplitude calculations
[in]	normInt	A reference to the appropriate normalization integral interface
[in]	dataReader	A reference to the DataReader that will supply the data
[in]	parManager	A reference to the ParameterManagerMPI instance that has been created to manage parameters on the node.

See also: LikelihoodCalculator; LikelihoodManagerMPI

Definition at line 44 of file LikelihoodCalculatorMPI.cc.

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◆ ~LikelihoodCalculatorMPI()

LikelihoodCalculatorMPI::~LikelihoodCalculatorMPI ( )

This is the destructor. When the instance of LikelihoodCalculatorMPI is destroyed on the master node, it sends the exit flag (via the LikelihoodManagerMPI) to the corresponding LikelihoodCalculatorMPI that exists on the worker nodes.

Definition at line 83 of file LikelihoodCalculatorMPI.cc.

Member Function Documentation

◆ operator()()

double LikelihoodCalculatorMPI::operator() ( )

virtual

The following operator should only ever be called on the master. It overrides the operator()() that is called from MIFunctionContribution class. Using the LikelihoodManagerMPI, it directs all of the workers to compute and then send partial contributions of the sum of log intensities. The routine on the master collects and sums the contributions from the workers. It then, if necessary, triggers an update of the normalization integral calculculation on the workers. Finally it provides the new -2 ln( likelihood ) for the fit.

Reimplemented from LikelihoodCalculator.

Definition at line 105 of file LikelihoodCalculatorMPI.cc.

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