AINewHotEdgeEvent (Jikes RVM API)

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org.jikesrvm.adaptive.controller
Class AINewHotEdgeEvent

java.lang.Object
  org.jikesrvm.adaptive.controller.HotMethodEvent
      org.jikesrvm.adaptive.controller.AINewHotEdgeEvent

All Implemented Interfaces:: ControllerInputEvent

public final class AINewHotEdgeEvent
extends HotMethodEvent
implements ControllerInputEvent
extends HotMethodEvent
implements ControllerInputEvent

Event used by the Adaptive Inlining Organizer to notify the controller that a call arc originating in a hot method has become hot and therefore recompilation of the method should be considered to enable additional profile-directed inlining.

Field Summary
`private double`	`boostFactor` Estimate of the expected benefit if the method is recompiled AT THE SAME OPT LEVEL with the newly enabled profile-directed inlining.

Constructor Summary
`AINewHotEdgeEvent(CompiledMethod _cm, double _numSamples, double _boostFactor)`
`AINewHotEdgeEvent(CompiledMethod _cm, int _numSamples, double _boostFactor)`

Method Summary
`double`	`getBoostFactor()`
`void`	`process()` Called when the controller is ready to process this event.
`String`	`toString()`

Methods inherited from class org.jikesrvm.adaptive.controller.HotMethodEvent
`getCMID, getCompiledMethod, getMethod, getNumSamples, getOptCompiledLevel, getPrevCompilerConstant, isOptCompiled`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

boostFactor

private double boostFactor

Estimate of the expected benefit if the method is recompiled AT THE SAME OPT LEVEL with the newly enabled profile-directed inlining.

TODO: Think about reasonable ways to encode the expected boost factor for recompiling at higher opt levels. In the short run, this is academic, since we only plan to create an instance of this event for methods already compiled at max opt level, but it may be required later.

NB: Boost factor is a value >= 1.0! (1.0 means no boost, 1.1 means a 10% improvement, etc).

Constructor Detail