org.mmtk.utility.gcspy.drivers

Class GenLOSDriver

java.lang.Object

org.mmtk.utility.gcspy.drivers.AbstractDriver

org.mmtk.utility.gcspy.drivers.TreadmillDriver

org.mmtk.utility.gcspy.drivers.GenLOSDriver

public class GenLOSDriver
extends TreadmillDriver

This class extends a simple driver for the MMTk LargeObjectSpace for Generational Collectors.

Field Summary

Fields

Modifier and Type	Field and Description
private static boolean	DEBUG
protected ShortStream	remsetStream The additional remset stream
protected int	totalRemset total of remset Addresses

Fields inherited from class org.mmtk.utility.gcspy.drivers.TreadmillDriver

allTileNum, maxAddr, objectsStream, refFromImmortalStream, rootsStream, subspace, threshold, totalObjects, totalRefFromImmortal, totalRoots, totalUsedSpace, usedSpaceStream

Fields inherited from class org.mmtk.utility.gcspy.drivers.AbstractDriver

blockSize, changed, control, CONTROL_BACKGROUND, CONTROL_LINK, CONTROL_SEPARATOR, CONTROL_UNUSED, CONTROL_USED, maxTileNum, mmtkSpace, myClass, name, server, serverSpace, streams

Constructor Summary

Constructors

Constructor and Description
GenLOSDriver(ServerInterpreter server, String spaceName, LargeObjectSpace lospace, int blockSize, int threshold, boolean mainSpace) Create a new driver for this collector

Method Summary

Modifier and Type	Method and Description
private ShortStream	createRemsetStream()
protected String	getDriverName() Get the name of this driver type.
boolean	handleRemsetAddress(Address addr) Handle a remset address.
void	resetRemsetStream() Reset the remset Stream.
protected void	setupSummaries() Setup summaries part of the transmit method.

Methods inherited from class org.mmtk.utility.gcspy.drivers.TreadmillDriver

handleReferenceFromImmortalSpace, handleRoot, resetData, resetRootsStream, scan, transmit

Methods inherited from class org.mmtk.utility.gcspy.drivers.AbstractDriver

addControl, addStream, controlIsBackground, controlIsSeparator, controlIsUnused, controlIsUsed, controlValues, countTileNum, countTileNum, createServerSpace, createSubspace, getControl, getMaxTileNum, getServerSpace, initControl, initControls, isConnected, maxObjectsPerBlock, scan, scan, scan, send, setControl, setRange, setRange, setSpaceInfo, setTilenames

Methods inherited from class java.lang.Object

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

Field Detail

DEBUG

private static final boolean DEBUG

See Also:

Constant Field Values

remsetStream

protected ShortStream remsetStream

The additional remset stream

totalRemset

protected int totalRemset

total of remset Addresses

Constructor Detail

GenLOSDriver

public GenLOSDriver(ServerInterpreter server,
                    String spaceName,
                    LargeObjectSpace lospace,
                    int blockSize,
                    int threshold,
                    boolean mainSpace)

Create a new driver for this collector

Parameters:

server - The name of the GCspy server that owns this space

spaceName - The name of this driver

lospace - the large object space for this allocator

blockSize - The tile size

threshold - the size threshold of the LOS

mainSpace - Is this the main space?

Method Detail

getDriverName

protected String getDriverName()

Get the name of this driver type.

Overrides:

getDriverName in class TreadmillDriver

Returns:

The name, "MMTk GenLOSDriver" for this driver.

createRemsetStream

private ShortStream createRemsetStream()

setupSummaries

protected void setupSummaries()

Setup summaries part of the transmit method.

Overrides transmitSetupSummaries of superclass to handle additional streams.

Overrides:

setupSummaries in class TreadmillDriver

handleRemsetAddress

public boolean handleRemsetAddress(Address addr)

Handle a remset address.

Parameters:

addr - Remset Address

Returns:

true if the given Address is in this subspace.

resetRemsetStream

public void resetRemsetStream()

Reset the remset Stream.

The remset Stream has to be reset seperately because we do not gather data in the usual way using scan().