ImmixCollector (Jikes RVM API)

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org.mmtk.plan.immix
Class ImmixCollector

java.lang.Object
  org.mmtk.plan.CollectorContext
      org.mmtk.plan.ParallelCollector
          org.mmtk.plan.SimpleCollector
              org.mmtk.plan.StopTheWorldCollector
                  org.mmtk.plan.immix.ImmixCollector

All Implemented Interfaces:: Constants

Direct Known Subclasses:: StickyImmixCollector

public class ImmixCollector
extends StopTheWorldCollector
extends StopTheWorldCollector

This class implements per-collector thread behavior and state for the Immix plan, which implements a full-heap immix collector.

Specifically, this class defines Immix collection behavior (through fastTrace and the collectionPhase method).

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

Field Summary
`protected ImmixAllocator`	`copy`
`protected TraceLocal`	`currentTrace`
`protected ImmixDefragTraceLocal`	`defragTrace`
`protected ImmixTraceLocal`	`fastTrace`
`protected CollectorLocal`	`immix`
`protected BumpPointer`	`immortal`

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
`ImmixCollector()` Constructor

Method Summary
`Address`	`allocCopy(ObjectReference original, int bytes, int align, int offset, int allocator)` Allocate space for copying an object (this method does not copy the object, it only allocates space)
`void`	`collectionPhase(short phaseId, boolean primary)` Perform a (local, i.e.per-collector) collection phase.
`TraceLocal`	`getCurrentTrace()`
`private static Immix`	`global()`
`void`	`postCopy(ObjectReference object, ObjectReference typeRef, int bytes, int allocator)` Perform any post-copy actions.

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

fastTrace

protected ImmixTraceLocal fastTrace

defragTrace

protected ImmixDefragTraceLocal defragTrace

immix

protected CollectorLocal immix

copy

protected final ImmixAllocator copy

immortal

protected final BumpPointer immortal

currentTrace

protected TraceLocal currentTrace

Constructor Detail

ImmixCollector

public ImmixCollector()

Constructor

Method Detail

allocCopy

public Address allocCopy(ObjectReference original,
                         int bytes,
                         int align,
                         int offset,
                         int allocator)

Allocate space for copying an object (this method does not copy the object, it only allocates space)

Overrides:: allocCopy in class CollectorContext

Parameters:: original - The object that is being copied.; bytes - The size of the space to be allocated (in bytes); align - Required alignment for the copy; offset - Offset associated with the alignment.; allocator - The allocator associated with this request
Returns:: The address of the first byte of the allocated region

postCopy

public void postCopy(ObjectReference object,
                     ObjectReference typeRef,
                     int bytes,
                     int allocator)

Description copied from class: CollectorContext

Perform any post-copy actions.

Overrides:: postCopy in class CollectorContext

Parameters:: object - The newly allocated object.; typeRef - the type reference for the instance being created.; bytes - The size of the space to be allocated (in bytes).; allocator - The allocator statically assigned to this allocation.

collectionPhase

public 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?

global

private static Immix global()

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

getCurrentTrace

public final TraceLocal getCurrentTrace()

Overrides:: getCurrentTrace in class ParallelCollector

Returns:: The current fastTrace instance.