org.mmtk.policy.immix

Class Defrag

java.lang.Object

org.mmtk.policy.immix.Defrag

public class Defrag
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
private int	availableCleanPagesForDefrag
private int	debugBytesDefraged
private boolean	debugCollectionTypeDetermined
static SizeCounter	defragBytesFreed
static SizeCounter	defragBytesNotFreed
static SizeCounter	defragCleanBytesAvailable
static SizeCounter	defragCleanBytesUsed
(package private) static short	defragReusableMarkStateThreshold
static EventCounter	defrags
private boolean	defragSpaceExhausted
(package private) static short	defragSpillThreshold
private boolean	inDefragCollection
private FreeListPageResource	pr
private int[]	spillAvailHistogram
private int[][]	spillMarkHistograms

Constructor Summary

Constructors

Constructor and Description
Defrag(FreeListPageResource pr)

Method Summary

Modifier and Type	Method and Description
(package private) void	decideWhetherToDefrag(boolean emergencyCollection, boolean collectWholeHeap, int collectionAttempt, boolean userTriggered, boolean exhaustedReusableSpace)
(package private) boolean	determined(boolean inDefrag)
private void	establishDefragSpillThreshold(ChunkList chunkMap, ImmixSpace space)
(package private) int[]	getAndZeroSpillMarkHistogram(int ordinal)
(package private) void	getBlock()
(package private) int	getDefragHeadroomPages()
(package private) void	globalRelease()
(package private) boolean	inDefrag()
(package private) void	prepare(ChunkList chunkMap, ImmixSpace space)
(package private) void	prepareHistograms() Prepares the histograms.
(package private) boolean	spaceExhausted()

Methods inherited from class java.lang.Object

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

Field Detail

inDefragCollection

private boolean inDefragCollection

debugBytesDefraged

private int debugBytesDefraged

availableCleanPagesForDefrag

private int availableCleanPagesForDefrag

defragSpaceExhausted

private boolean defragSpaceExhausted

spillMarkHistograms

private int[][] spillMarkHistograms

spillAvailHistogram

private final int[] spillAvailHistogram

defragCleanBytesUsed

public static SizeCounter defragCleanBytesUsed

defragBytesNotFreed

public static SizeCounter defragBytesNotFreed

defragBytesFreed

public static SizeCounter defragBytesFreed

defragCleanBytesAvailable

public static SizeCounter defragCleanBytesAvailable

pr

private final FreeListPageResource pr

debugCollectionTypeDetermined

private boolean debugCollectionTypeDetermined

defragSpillThreshold

static short defragSpillThreshold

defragReusableMarkStateThreshold

static short defragReusableMarkStateThreshold

defrags

public static EventCounter defrags

Constructor Detail

Defrag

Defrag(FreeListPageResource pr)

Method Detail

prepareHistograms

void prepareHistograms()

Prepares the histograms.

This needs to happen at runtime because the collector count is not known at build time.

inDefrag

boolean inDefrag()

prepare

void prepare(ChunkList chunkMap,
             ImmixSpace space)

globalRelease

void globalRelease()

getDefragHeadroomPages

int getDefragHeadroomPages()

decideWhetherToDefrag

void decideWhetherToDefrag(boolean emergencyCollection,
                           boolean collectWholeHeap,
                           int collectionAttempt,
                           boolean userTriggered,
                           boolean exhaustedReusableSpace)

determined

boolean determined(boolean inDefrag)

getBlock

void getBlock()

establishDefragSpillThreshold

private void establishDefragSpillThreshold(ChunkList chunkMap,
                                           ImmixSpace space)

spaceExhausted

boolean spaceExhausted()

getAndZeroSpillMarkHistogram

int[] getAndZeroSpillMarkHistogram(int ordinal)