GCTraceCollector (Jikes RVM API)

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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

All Implemented Interfaces:: Constants

public class GCTraceCollector
extends SSCollector
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
`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`

Fields inherited from interface org.mmtk.utility.Constants
ALIGNMENT_VALUE, ARRAY_ELEMENT, BITS_IN_ADDRESS, BITS_IN_BYTE, BITS_IN_CHAR, BITS_IN_INT, BITS_IN_PAGE, BITS_IN_SHORT, BITS_IN_WORD, BYTES_IN_ADDRESS, BYTES_IN_BYTE, BYTES_IN_CHAR, 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, INSTANCE_FIELD, LOG_BITS_IN_ADDRESS, LOG_BITS_IN_BYTE, LOG_BITS_IN_CHAR, 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_CHAR, 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, SUPPORT_CARD_SCANNING

Fields inherited from interface org.mmtk.utility.Constants

ALIGNMENT_VALUE, ARRAY_ELEMENT, BITS_IN_ADDRESS, BITS_IN_BYTE, BITS_IN_CHAR, BITS_IN_INT, BITS_IN_PAGE, BITS_IN_SHORT, BITS_IN_WORD, BYTES_IN_ADDRESS, BYTES_IN_BYTE, BYTES_IN_CHAR, 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, INSTANCE_FIELD, LOG_BITS_IN_ADDRESS, LOG_BITS_IN_BYTE, LOG_BITS_IN_CHAR, 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_CHAR, 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, SUPPORT_CARD_SCANNING

Constructor Summary
`GCTraceCollector()` Constructor

Method Summary
`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.