MSCollector (Jikes RVM API)

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org.mmtk.plan.marksweep
Class MSCollector

java.lang.Object
  org.mmtk.plan.CollectorContext
      org.mmtk.plan.SimpleCollector
          org.mmtk.plan.StopTheWorldCollector
              org.mmtk.plan.marksweep.MSCollector

All Implemented Interfaces:: Constants

Direct Known Subclasses:: PoisonedCollector, StickyMSCollector

public class MSCollector
extends StopTheWorldCollector
extends StopTheWorldCollector

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

Specifically, this class defines MS collection behavior (through trace and the collectionPhase method).

See Also:: for an overview of the mark-sweep algorithm.
FIXME The SegregatedFreeList class (and its decendents such as MarkSweepLocal) does not properly separate mutator and collector behaviors, so the ms field below should really not exist in this class as there is no collection-time allocation in this collector., MS, MSMutator, StopTheWorldCollector, CollectorContext

Field Summary
`protected TraceLocal`	`currentTrace`
`protected MSTraceLocal`	`fullTrace` Instance fields
`protected MarkSweepLocal`	`ms`

Fields inherited from class org.mmtk.plan.CollectorContext
`id, immortal, resetConcurrentWork, sanityLocal`

Fields inherited from interface org.mmtk.utility.Constants
AALOAD_READ_BARRIER, AASTORE_WRITE_BARRIER, ALIGNMENT_VALUE, BITS_IN_ADDRESS, BITS_IN_BYTE, BITS_IN_INT, BITS_IN_PAGE, BITS_IN_SHORT, BITS_IN_WORD, BYTES_IN_ADDRESS, BYTES_IN_BYTE, BYTES_IN_INT, BYTES_IN_KBYTE, BYTES_IN_MBYTE, BYTES_IN_PAGE, BYTES_IN_SHORT, BYTES_IN_WORD, CARD_MASK, CARD_META_PAGES_PER_REGION, GETFIELD_READ_BARRIER, GETSTATIC_READ_BARRIER, LOG_BITS_IN_ADDRESS, LOG_BITS_IN_BYTE, LOG_BITS_IN_INT, LOG_BITS_IN_PAGE, LOG_BITS_IN_SHORT, LOG_BITS_IN_WORD, LOG_BYTES_IN_ADDRESS, LOG_BYTES_IN_ADDRESS_SPACE, LOG_BYTES_IN_BYTE, LOG_BYTES_IN_INT, LOG_BYTES_IN_KBYTE, LOG_BYTES_IN_MBYTE, LOG_BYTES_IN_PAGE, LOG_BYTES_IN_SHORT, LOG_BYTES_IN_WORD, LOG_CARD_BYTES, LOG_CARD_GRAIN, LOG_CARD_META_BYTES, LOG_CARD_META_PAGES, LOG_CARD_META_SIZE, LOG_CARD_UNITS, LOG_MIN_ALIGNMENT, MAX_ALIGNMENT, MAX_BYTES_PADDING, MAX_INT, MIN_ALIGNMENT, MIN_INT, PUTFIELD_WRITE_BARRIER, PUTSTATIC_WRITE_BARRIER, SUPPORT_CARD_SCANNING

Fields inherited from interface org.mmtk.utility.Constants

AALOAD_READ_BARRIER, AASTORE_WRITE_BARRIER, ALIGNMENT_VALUE, BITS_IN_ADDRESS, BITS_IN_BYTE, BITS_IN_INT, BITS_IN_PAGE, BITS_IN_SHORT, BITS_IN_WORD, BYTES_IN_ADDRESS, BYTES_IN_BYTE, BYTES_IN_INT, BYTES_IN_KBYTE, BYTES_IN_MBYTE, BYTES_IN_PAGE, BYTES_IN_SHORT, BYTES_IN_WORD, CARD_MASK, CARD_META_PAGES_PER_REGION, GETFIELD_READ_BARRIER, GETSTATIC_READ_BARRIER, LOG_BITS_IN_ADDRESS, LOG_BITS_IN_BYTE, LOG_BITS_IN_INT, LOG_BITS_IN_PAGE, LOG_BITS_IN_SHORT, LOG_BITS_IN_WORD, LOG_BYTES_IN_ADDRESS, LOG_BYTES_IN_ADDRESS_SPACE, LOG_BYTES_IN_BYTE, LOG_BYTES_IN_INT, LOG_BYTES_IN_KBYTE, LOG_BYTES_IN_MBYTE, LOG_BYTES_IN_PAGE, LOG_BYTES_IN_SHORT, LOG_BYTES_IN_WORD, LOG_CARD_BYTES, LOG_CARD_GRAIN, LOG_CARD_META_BYTES, LOG_CARD_META_PAGES, LOG_CARD_META_SIZE, LOG_CARD_UNITS, LOG_MIN_ALIGNMENT, MAX_ALIGNMENT, MAX_BYTES_PADDING, MAX_INT, MIN_ALIGNMENT, MIN_INT, PUTFIELD_WRITE_BARRIER, PUTSTATIC_WRITE_BARRIER, SUPPORT_CARD_SCANNING

Constructor Summary
`MSCollector()` Constructor

Method Summary
`void`	`collectionPhase(short phaseId, boolean primary)` Perform a per-collector collection phase.
`TraceLocal`	`getCurrentTrace()`
`private static MS`	`global()`

Methods inherited from class org.mmtk.plan.StopTheWorldCollector
`collect, concurrentCollect, concurrentCollectionPhase`

Methods inherited from class org.mmtk.plan.CollectorContext
`allocCopy, clearResetConcurrentWork, copyCheckAllocator, getId, postCopy, resetConcurrentWork`

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

Field Detail

fullTrace

protected MSTraceLocal fullTrace

Instance fields

currentTrace

protected TraceLocal currentTrace

ms

protected MarkSweepLocal ms

Constructor Detail

MSCollector

public MSCollector()

Constructor

Method Detail

collectionPhase

public void collectionPhase(short phaseId,
                            boolean primary)

Perform a per-collector collection phase.

Overrides:: collectionPhase in class SimpleCollector

Parameters:: phaseId - The collection phase to perform; primary - Perform any single-threaded activities using this thread.

global

private static MS global()

Returns:: The active global plan as an MS instance.

getCurrentTrace

public final TraceLocal getCurrentTrace()

Specified by:: getCurrentTrace in class CollectorContext

Returns:: The current trace instance.