org.mmtk.utility.statistics

Class EventCounter

java.lang.Object

org.mmtk.utility.statistics.Counter

org.mmtk.utility.statistics.EventCounter

public class EventCounter
extends Counter

This class implements a simple event counter (counting number events that occur for each phase).

Field Summary

Fields

Modifier and Type	Field and Description
private long[]	count
protected long	currentCount
private boolean	running

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

complex

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
void	inc() Increment the event counter
void	inc(int value) Increment the event counter by value
(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	printCurrent() Print the current value for this counter (mid-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
void	printTotal() Print the current total for this counter
protected void	printTotal(boolean mutator) Print the current total for either the mutator or GC phase
(package private) void	printValue(long value) Print the given value
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

count

private final long[] count

currentCount

protected long currentCount

running

private boolean running

Constructor Detail

EventCounter

public EventCounter(String name)

Constructor

Parameters:

name - The name to be associated with this counter

EventCounter

public EventCounter(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).

EventCounter

public EventCounter(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

inc

public void inc()

Increment the event counter

inc

public void inc(int value)

Increment the event counter by value

Parameters:

value - The amount by which the counter should be incremented.

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

printCurrent

public final void printCurrent()

Print the current value for this counter (mid-phase)

printTotal

public final void printTotal()

Description copied from class: Counter

Print the current total 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)

Description copied from class: Counter

Print the current minimum value for either the mutator or GC phase

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)

Description copied from class: Counter

Print the current maximum value for either the mutator or GC phase

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(long 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