org.mmtk.utility.statistics

Class BooleanCounter

java.lang.Object

org.mmtk.utility.statistics.Counter

org.mmtk.utility.statistics.BooleanCounter

public class BooleanCounter
extends Counter

This class implements a simple boolean counter (counting number of phases where some boolean event is true).

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	running
private boolean[]	state
protected int	total

Fields inherited from class org.mmtk.utility.statistics.Counter

complex

Constructor Summary

Constructors

Constructor and Description
BooleanCounter(String name) Constructor
BooleanCounter(String name, boolean start) Constructor
BooleanCounter(String name, boolean start, boolean mergephases) Constructor

Method Summary

Modifier and Type	Method and Description
(package private) void	phaseChange(int oldPhase) The phase has changed (from GC to mutator or mutator to GC).
protected void	printCount(int phase) Print the value of this counter for the given phase
void	printLast() Print statistics for the most recent phase
protected void	printMax(boolean mutator) Print the current maximum value for either the mutator or GC phase
protected void	printMin(boolean mutator) Print the current minimum value for either the mutator or GC phase
protected void	printTotal() Print the current total number of true phases for this counter
protected void	printTotal(boolean mutator) Print the current total for either the mutator or GC phase
(package private) void	printValue(int value) Print the given value
void	set() Set the boolean to true for this phase, increment the total.
protected void	start() Start this counter
protected void	stop() Stop this counter

Methods inherited from class org.mmtk.utility.statistics.Counter

getColumnSuffix, getName, getStart, isComplex, mergePhases

Methods inherited from class java.lang.Object

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

Field Detail

state

private final boolean[] state

total

protected int total

running

private boolean running

Constructor Detail

BooleanCounter

public BooleanCounter(String name)

Constructor

Parameters:

name - The name to be associated with this counter

BooleanCounter

public BooleanCounter(String name,
                      boolean start)

Constructor

Parameters:

name - The name to be associated with this counter

start - true if this counter is to be implicitly started when startAll() is called (otherwise the counter must be explicitly started).

BooleanCounter

public BooleanCounter(String name,
                      boolean start,
                      boolean mergephases)

Constructor

Parameters:

name - The name to be associated with this counter

start - True if this counter is to be implicitly started when startAll() is called (otherwise the counter must be explicitly started).

mergephases - True if this counter does not separately report GC and Mutator phases.

Method Detail

set

public void set()

Set the boolean to true for this phase, increment the total.

start

protected void start()

Start this counter

Specified by:

start in class Counter

stop

protected void stop()

Description copied from class: Counter

Stop this counter

Specified by:

stop in class Counter

phaseChange

void phaseChange(int oldPhase)

The phase has changed (from GC to mutator or mutator to GC). Take action with respect to the last phase if necessary. Do nothing in this case.

Specified by:

phaseChange in class Counter

Parameters:

oldPhase - The last phase

printCount

protected final void printCount(int phase)

Print the value of this counter for the given phase Print '0' for false, '1' for true.

Specified by:

printCount in class Counter

Parameters:

phase - The phase to be printed

printTotal

protected final void printTotal()

Print the current total number of true phases for this counter

Specified by:

printTotal in class Counter

printTotal

protected final void printTotal(boolean mutator)

Description copied from class: Counter

Print the current total for either the mutator or GC phase

Specified by:

printTotal in class Counter

Parameters:

mutator - true if the total for the mutator phases is to be printed (otherwise the total for the GC phases will be printed).

printMin

protected final void printMin(boolean mutator)

Print the current minimum value for either the mutator or GC phase Do nothing in this case.

Specified by:

printMin in class Counter

Parameters:

mutator - true if the minimum for the mutator phase is to be printed (otherwise the minimum for the GC phase will be printed).

printMax

protected final void printMax(boolean mutator)

Print the current maximum value for either the mutator or GC phase Do nothing in this case.

Specified by:

printMax in class Counter

Parameters:

mutator - true if the maximum for the mutator phase is to be printed (otherwise the maximum for the GC phase will be printed).

printValue

void printValue(int value)

Print the given value

Parameters:

value - The value to be printed

printLast

public void printLast()

Description copied from class: Counter

Print statistics for the most recent phase

Overrides:

printLast in class Counter