Class SolverMultiClosedMVA

java.lang.Object

solvers.SolverMulti

solvers.multiSolverAlgorithms.SolverMultiClosedMVA

public class SolverMultiClosedMVA
extends SolverMulti

Solves a multiclass closed model with the exact MVA (Mean Value Analysis) algorithm [RL80]. The implemented version is the stabilized MVA [BBC+81], which avoids the numerical instabilities of the classic MVA when the model contains load dependent stations, as described in the JMVA chapter of the JMT user manual.

Author:

Federico Granata, Stefano Omini

Field Summary

Fields

Modifier and Type	Field	Description
final boolean	DEBUG

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
SolverMultiClosedMVA(int classes, int stations)	Creates new SolverMultiClosedMVA

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 classes.
boolean	input(String[] n, int[] t, double[][][] s, double[][] v, int[] pop)	initializes the Multi class solver with the system parameters.
static void	main(String[] args)
static int[]	pprod(int[] N)
static boolean	pprod(int[] n, int[] N)
void	solve()	Solves the model "input(...)" method must have been called before solving the model!!
String	toString()	generates a string with all the calculated indices.

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, printIndices, setServTime

Methods inherited from class Object

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

Field Details

DEBUG

public final boolean DEBUG

See Also:

• Constant Field Values

Constructor Details

SolverMultiClosedMVA

public SolverMultiClosedMVA(int classes,
 int stations)

Creates new SolverMultiClosedMVA

Parameters:

classes - number of classes

stations - number of service centers

Method Details

input

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

initializes the Multi class solver with the system parameters.

Overrides:

input in class SolverMulti

Parameters:

n - array of names of the service centers.

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

s - matrix of service time of the service centers.

v - matrix of visits to the service centers.

pop - array of populations of each class

Returns:

true if the operation is completed with success

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 classes.
Must be implemented to create a multi class model solver.
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

solve

public void solve()

Solves the model
"input(...)" method must have been called before solving the model!!

Specified by:

solve in class SolverMulti

toString

public String toString()

generates a string with all the calculated indices.

Overrides:

toString in class SolverMulti

Returns:

the string

pprod

public static int[] pprod(int[] N)

pprod

public static boolean pprod(int[] n,
 int[] N)

main

public static void main(String[] args)