Class MoMSolver

java.lang.Object

solvers.queueingnet.QNSolver

solvers.queueingnet.MoMSolver

All Implemented Interfaces:

QNSolverInterface

public class MoMSolver
extends QNSolver

This class implements the MoMSolver object, which computes the normalising constant for a network using the MoM algorithm. This algorithm is linear system solver agnostic.

Author:

Michail Makaronidis, 2010

Field Summary

Fields inherited from class QNSolver

G, memUsage, qnm, totalTimer

Constructor Summary

Constructors

Constructor	Description
MoMSolver(QNModel qnm, int nThreads)	Creates and initialises a RECALSolver object.

Method Summary

Modifier and Type	Method	Description
void	computeNormalisingConstant()	Computes the normalising constant for the specified QNModel.
void	computePerformanceMeasures()	Computes and stores the performance measures (mean throughputs and mean queue lengths for the current model.
void	printTimeStatistics()	Prints the time needed for the solver object to evaluate the network.
void	printWelcome()	Prints a short welcome message that says which solver is used.

Methods inherited from class QNSolver

getNormalisingConstant, printMemUsage

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

MoMSolver

public MoMSolver(QNModel qnm,
 int nThreads)

Creates and initialises a RECALSolver object.

Parameters:

qnm - The QNModel object that we are working on

nThreads - The number of threads the MoMSolver must use for solution. If nThreads >= 2, then LinearSystem.ModularSolver is used.

Method Details

printWelcome

public void printWelcome()

Prints a short welcome message that says which solver is used.

Specified by:

printWelcome in interface QNSolverInterface

Overrides:

printWelcome in class QNSolver

computeNormalisingConstant

public void computeNormalisingConstant()
                                throws InternalErrorException

Description copied from class: QNSolver

Computes the normalising constant for the specified QNModel.

Specified by:

computeNormalisingConstant in interface QNSolverInterface

Overrides:

computeNormalisingConstant in class QNSolver

Throws:

InternalErrorException - * @throws InternalErrorException An exception is thrown if any internal error is encountered during computations.

computePerformanceMeasures

public void computePerformanceMeasures()
                                throws InternalErrorException

Description copied from class: QNSolver

Computes and stores the performance measures (mean throughputs and mean queue lengths for the current model.

Specified by:

computePerformanceMeasures in interface QNSolverInterface

Overrides:

computePerformanceMeasures in class QNSolver

Throws:

InternalErrorException - Thrown when any computation fails

printTimeStatistics

public void printTimeStatistics()

Description copied from class: QNSolver

Prints the time needed for the solver object to evaluate the network.

Specified by:

printTimeStatistics in interface QNSolverInterface

Overrides:

printTimeStatistics in class QNSolver