org.mmtk.utility.statistics

Class SizeCounter

java.lang.Object

org.mmtk.utility.statistics.SizeCounter

public class SizeCounter
extends Object

This class implements a simple counter of events of different sizes (eg object allocations, where total number of objects and total volume of objects would be counted).

The counter is trivially composed from two event counters (one for counting the number of events, the other for counting the volume).

Field Summary

Fields

Modifier and Type	Field and Description
private EventCounter	units
private EventCounter	volume

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
void	inc(int value) Increment the event counter by value
void	printCurrentUnits() Print current (mid-phase) units
void	printCurrentVolume() Print (mid-phase) volume
void	printUnits() Print units
void	printVolume() Print volume
void	start() Start this counter
void	stop() Stop this counter

Methods inherited from class java.lang.Object

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

Field Detail

units

private final EventCounter units

volume

private final EventCounter volume

Constructor Detail

SizeCounter

public SizeCounter(String name)

Constructor

Parameters:

name - The name to be associated with this counter

SizeCounter

public SizeCounter(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).

SizeCounter

public SizeCounter(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(int value)

Increment the event counter by value

Parameters:

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

start

public void start()

Start this counter

stop

public void stop()

Stop this counter

printCurrentUnits

public void printCurrentUnits()

Print current (mid-phase) units

printCurrentVolume

public void printCurrentVolume()

Print (mid-phase) volume

printUnits

public void printUnits()

Print units

printVolume

public void printVolume()

Print volume