org.mmtk.plan.semispace.gctrace

Class GCTraceCollector

java.lang.Object

org.mmtk.plan.CollectorContext

org.mmtk.plan.ParallelCollector

org.mmtk.plan.SimpleCollector

org.mmtk.plan.StopTheWorldCollector

org.mmtk.plan.semispace.SSCollector

org.mmtk.plan.semispace.gctrace.GCTraceCollector

public class GCTraceCollector
extends SSCollector

This class implements per-collector thread behavior and state for the GCTrace plan, which implements a GC tracing algorithm.

Specifically, this class defines SS collection behavior (through inducedTrace and the collectionPhase method), and collection-time allocation (copying of objects).

See GCTrace for an overview of the GC trace algorithm.

See Also:

SSCollector, GCTrace, GCTraceMutator, StopTheWorldCollector, CollectorContext

Field Summary

Fields

Modifier and Type	Field and Description
protected GCTraceTraceLocal	inducedTrace Instance fields

Fields inherited from class org.mmtk.plan.semispace.SSCollector

los, ss, trace

Fields inherited from class org.mmtk.plan.SimpleCollector

sanityLocal

Fields inherited from class org.mmtk.plan.ParallelCollector

group

Fields inherited from class org.mmtk.plan.CollectorContext

log

Constructor Summary

Constructors

Constructor and Description
GCTraceCollector() Constructor

Method Summary

Modifier and Type	Method and Description
void	collectionPhase(short phaseId, boolean primary) Perform a (local, i.e.per-collector) collection phase.
TraceLocal	getCurrentTrace()
private static GCTrace	global()

Methods inherited from class org.mmtk.plan.semispace.SSCollector

allocCopy, isSemiSpaceObject, postCopy

Methods inherited from class org.mmtk.plan.StopTheWorldCollector

collect, concurrentCollect, concurrentCollectionPhase

Methods inherited from class org.mmtk.plan.ParallelCollector

parallelWorkerCount, parallelWorkerOrdinal, park, rendezvous, run

Methods inherited from class org.mmtk.plan.CollectorContext

copyCheckAllocator, getId, getLog, initCollector

Methods inherited from class java.lang.Object

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

Field Detail

inducedTrace

protected final GCTraceTraceLocal inducedTrace

Instance fields

Constructor Detail

GCTraceCollector

public GCTraceCollector()

Constructor

Method Detail

collectionPhase

public void collectionPhase(short phaseId,
                            boolean primary)

Perform a (local, i.e.per-collector) collection phase.

Overrides:

collectionPhase in class SSCollector

Parameters:

phaseId - The unique phase identifier

primary - Should this thread be used to execute any single-threaded local operations?

global

private static GCTrace global()

Returns:

The active global plan as a GCTrace instance.

getCurrentTrace

public TraceLocal getCurrentTrace()

Overrides:

getCurrentTrace in class SSCollector

Returns:

The current trace instance.