Class SolverMultiMixed

java.lang.Object

solvers.SolverMulti

solvers.multiSolverAlgorithms.SolverMultiMixed

public class SolverMultiMixed
extends SolverMulti

Solves a multiclass mixed model, with both open and closed customer classes, combining the open model algorithms and the exact MVA algorithm as described in the JMVA chapter of the JMT user manual.

Author:

Federico Granata, Stefano Omini

Field Summary

Fields

Modifier and Type	Field	Description
protected int[]	classType	array with class types (0 for open, 1 for closed)
protected double[][]	demand	matrix with service demands
protected double[]	popPar	array describing the classes: each element can be either an arrival rate (for open classes) or a population (for closed ones), according to the class type

Fields inherited from class SolverMulti

classes, CLOSED_CLASS, clsNumJobs, clsRespTime, clsThroughput, DELAY, HOL, LD, LI, name, OPEN_CLASS, priorities, PRS, pw, queueLen, residenceTime, scQueueLen, scResidTime, scThroughput, scUtilization, servers, servTime, stations, sysNumJobs, sysResponseTime, sysThroughput, throughput, type, utilization, visits

Constructor Summary

Constructors

Constructor	Description
SolverMultiMixed(int classes, int stations)	Constructor

Method Summary

Modifier and Type	Method	Description
boolean	hasSufficientProcessingCapacity()	A system is said to have sufficient capacity to process a given load lambda if no service center is saturated as a result of the combined loads of all the open classes.
boolean	input(String[] n, int[] t, double[][][] s, double[][] v, double[] popPar, int[] classType)	initializes the Multi class solver with the system parameters.
void	setServTime(double[][][] servTime)
void	solve()	Must be implemented to create a multi class model solver.
void	solveLD()
void	solveLI()	Solves the system.

Methods inherited from class SolverMulti

getAggrQueueLen, getAggrQueueLen, getAggrResTime, getAggrResTime, getAggrThroughput, getAggrThroughput, getAggrUtilization, getAggrUtilization, getClsResTime, getClsResTime, getClsThroughput, getClsThroughput, getQueueLen, getQueueLen, getResTime, getResTime, getThroughput, getThroughput, getTotResTime, getTotThroughput, getUtilization, getUtilization, getVisits, input, input, printIndices, toString

Methods inherited from class Object

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

Field Details

classType

protected int[] classType

array with class types (0 for open, 1 for closed)

demand

protected double[][] demand

matrix with service demands

popPar

protected double[] popPar

array describing the classes: each element can be either an arrival rate (for open classes) or a population (for closed ones), according to the class type

Constructor Details

SolverMultiMixed

public SolverMultiMixed(int classes,
 int stations)

Constructor

Parameters:

classes - number of classes

stations - number of stations

Method Details

input

public boolean input(String[] n,
 int[] t,
 double[][][] s,
 double[][] v,
 double[] popPar,
 int[] classType)

initializes the Multi class solver with the system parameters.

Parameters:

n - array of names of service centers.

t - array of the types (LD or LI) of service centers.

s - matrix of service time of the service centers.

v - matrix of visits to the service centers.

popPar - array describing the classes: each element can be either an arrival rate (for open classes) or a population (for closed ones), according to the class type

classType - array of class types (open or closed)

Returns:

true if the operation has been completed with success

solve

public void solve()

Description copied from class: SolverMulti

Must be implemented to create a multi class model solver.

Specified by:

solve in class SolverMulti

solveLD

public void solveLD()

solveLI

public void solveLI()

Solves the system.

See:
E.D. Lazowska, J. Zahorjan, G.S. Graham, K. Sevcik
Quantitative System Performance,
Prentice Hall, 1984

setServTime

public void setServTime(double[][][] servTime)

Overrides:

setServTime in class SolverMulti

hasSufficientProcessingCapacity

public boolean hasSufficientProcessingCapacity()

A system is said to have sufficient capacity to process a given load lambda if no service center is saturated as a result of the combined loads of all the open classes.
WARNING: This method should be called before solving the system.

Specified by:

hasSufficientProcessingCapacity in class SolverMulti

Returns:

true if sufficient capacity exists for the given workload, false otherwise