org.mmtk.plan.markcompact

Class MCCollector

java.lang.Object

org.mmtk.plan.CollectorContext

org.mmtk.plan.ParallelCollector

org.mmtk.plan.SimpleCollector

org.mmtk.plan.StopTheWorldCollector

org.mmtk.plan.markcompact.MCCollector

public class MCCollector
extends StopTheWorldCollector

This class implements per-collector thread behavior and state for the MC plan, which implements a full-heap mark-compact collector.

Specifically, this class defines MC collection behavior (through trace and the collectionPhase method), and collection-time allocation.

See Also:

for an overview of the mark-compact algorithm, MCMutator, StopTheWorldCollector, CollectorContext

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	currentTrace
private MCForwardTraceLocal	forwardTrace
private MCMarkTraceLocal	markTrace
private MarkCompactCollector	mc
private static boolean	TRACE_FORWARD
private static boolean	TRACE_MARK

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
MCCollector() 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 MC	global()

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

allocCopy, copyCheckAllocator, getId, getLog, initCollector, postCopy

Methods inherited from class java.lang.Object

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

Field Detail

TRACE_MARK

private static final boolean TRACE_MARK

See Also:

Constant Field Values

TRACE_FORWARD

private static final boolean TRACE_FORWARD

See Also:

Constant Field Values

markTrace

private final MCMarkTraceLocal markTrace

forwardTrace

private final MCForwardTraceLocal forwardTrace

mc

private final MarkCompactCollector mc

currentTrace

private boolean currentTrace

Constructor Detail

MCCollector

public MCCollector()

Constructor

Method Detail

collectionPhase

public final void collectionPhase(short phaseId,
                                  boolean primary)

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

Overrides:

collectionPhase in class SimpleCollector

Parameters:

phaseId - The unique phase identifier

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

getCurrentTrace

public final TraceLocal getCurrentTrace()

Overrides:

getCurrentTrace in class ParallelCollector

Returns:

The current trace instance.

global

private static MC global()

Returns:

The active global plan as an MC instance.