GenLOSDriver (Jikes RVM API)

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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
extends TreadmillDriver

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

Field Summary
`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
`GenLOSDriver(ServerInterpreter server, String spaceName, LargeObjectSpace lospace, int blockSize, int threshold, boolean mainSpace)` Create a new driver for this collector

Method Summary
`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().