org.jikesrvm.adaptive.database.callgraph

Class WeightedCallTargets.SingleTarget

java.lang.Object

org.jikesrvm.adaptive.database.callgraph.WeightedCallTargets

org.jikesrvm.adaptive.database.callgraph.WeightedCallTargets.SingleTarget

Enclosing class:

WeightedCallTargets

private static final class WeightedCallTargets.SingleTarget
extends WeightedCallTargets

An implementation for storing a call site distribution that has a single target.

Nested Class Summary

Nested classes/interfaces inherited from class org.jikesrvm.adaptive.database.callgraph.WeightedCallTargets

WeightedCallTargets.Visitor

Field Summary

Fields

Modifier and Type	Field and Description
private RVMMethod	target
private float	weight

Constructor Summary

Constructors

Constructor and Description
SingleTarget(RVMMethod t, double w)

Method Summary

Modifier and Type	Method and Description
WeightedCallTargets	augmentCount(RVMMethod t, double v) Augment the weight associated with the argument method by the argument amount.
void	decay(double rate) Decay the weights of all call targets by the specified amount
WeightedCallTargets	filter(RVMMethod goal, boolean isPrecise)
double	totalWeight()
void	visitTargets(WeightedCallTargets.Visitor func) Iterate over all of the targets, evaluating the argument function on each edge.

Methods inherited from class org.jikesrvm.adaptive.database.callgraph.WeightedCallTargets

create, incrementCount

Methods inherited from class java.lang.Object

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

Field Detail

target

private final RVMMethod target

weight

private float weight

Constructor Detail

SingleTarget

SingleTarget(RVMMethod t,
             double w)

Method Detail

visitTargets

public void visitTargets(WeightedCallTargets.Visitor func)

Description copied from class: WeightedCallTargets

Iterate over all of the targets, evaluating the argument function on each edge.

NOTE: We guarantee that the targets will be iterated in monotonically decreasing edge weight. This simplifies the coding of the inlining clients that consume this information.

Specified by:

visitTargets in class WeightedCallTargets

Parameters:

func - the function to evaluate on each target

augmentCount

public WeightedCallTargets augmentCount(RVMMethod t,
                                        double v)

Description copied from class: WeightedCallTargets

Augment the weight associated with the argument method by the argument amount. NOTE: This method may change the representation of the target method. The caller must be sure to update their backing store of WeightedCallTargets accordingly to avoid losing the update.

Specified by:

augmentCount in class WeightedCallTargets

Parameters:

t - the method whose count is to be incremented

v - amount to increment by

Returns:

the object representing the method's targets

decay

public void decay(double rate)

Description copied from class: WeightedCallTargets

Decay the weights of all call targets by the specified amount

Specified by:

decay in class WeightedCallTargets

Parameters:

rate - the value to decay by

totalWeight

public double totalWeight()

Specified by:

totalWeight in class WeightedCallTargets

Returns:

total weight of all call targets

filter

public WeightedCallTargets filter(RVMMethod goal,
                                  boolean isPrecise)

Specified by:

filter in class WeightedCallTargets

Parameters:

goal - RVMMethod that is the statically possible target

isPrecise - whether or not goal is a precise target, or should be interpreted as being the root of a virtual method family, any of which are statically possible.

Returns:

the filtered call targets or null if no such target exists