org.jikesrvm.adaptive.measurements.listeners

Class YieldCounterListener

java.lang.Object

org.jikesrvm.adaptive.measurements.listeners.Listener

org.jikesrvm.adaptive.measurements.listeners.NullListener

org.jikesrvm.adaptive.measurements.listeners.YieldCounterListener

public final class YieldCounterListener
extends NullListener

A YieldCounterListener samples yield points, and notifies an Organizer when a threshold is reached.

In effect, this class provides a way to "wake up" an infrequent service periodically.

Field Summary

Fields

Modifier and Type	Field and Description
private int	numYields
private int	totalYields
private int	yieldThreshold

Constructor Summary

Constructors

Constructor and Description
YieldCounterListener(int yieldThreshold) Constructor

Method Summary

Modifier and Type	Method and Description
void	report() Entry point to dump what has been collected.
void	reset() No-op.
void	update(int whereFrom) This method is called when its time to record that a yield point has occurred.

Methods inherited from class org.jikesrvm.adaptive.measurements.listeners.Listener

activate, activateOrganizer, isActive, passivate, setOrganizer

Methods inherited from class java.lang.Object

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

Field Detail

yieldThreshold

private final int yieldThreshold

numYields

private final int numYields

See Also:

Constant Field Values

totalYields

private int totalYields

Constructor Detail

YieldCounterListener

public YieldCounterListener(int yieldThreshold)

Constructor

Parameters:

yieldThreshold - the threshold of when to call organizer

Method Detail

update

public void update(int whereFrom)

Description copied from class: NullListener

This method is called when its time to record that a yield point has occurred.

Specified by:

update in class NullListener

Parameters:

whereFrom - Was this a yieldpoint in a PROLOGUE, BACKEDGE, or EPILOGUE?

report

public void report()

Description copied from class: Listener

Entry point to dump what has been collected.

Specified by:

report in class Listener

reset

public void reset()

No-op.

Specified by:

reset in class Listener