org.mmtk.vm.gcspy

Class ShortStream

java.lang.Object

org.mmtk.vm.gcspy.Stream

org.mmtk.vm.gcspy.ShortStream

Direct Known Subclasses:

ShortStream

public abstract class ShortStream
extends Stream

Set up a GCspy Stream with data type SHORT_TYPE.

Field Summary

Fields

Modifier and Type	Field and Description
private short[]	data
private short	defaultValue

Fields inherited from class org.mmtk.vm.gcspy.Stream

DEBUG, presentation, serverSpace, stream, streamId, summary0, summary1, summaryEnabled, summaryLen

Constructor Summary

Constructors

Constructor and Description
ShortStream(AbstractDriver driver, String name, short minValue, short maxValue, short zeroValue, short defaultValue, String stringPre, String stringPost, int presentation, int paintStyle, int indexMaxStream, Color colour, boolean summary) Construct a new GCspy stream of SHORT_TYPE

Method Summary

Modifier and Type	Method and Description
void	distribute(int start, short remainder, int blockSize, short value) Distribute a value across a sequence of tiles.
void	increment(int index, short value) Increment the value of a tile.
void	resetData() Reset all data in this stream to default values.
void	send(int event, int numTiles) Send the data for this stream.

Methods inherited from class org.mmtk.vm.gcspy.Stream

getMaxValue, getMinValue, sendSummary, setStream, setSummary, setSummary

Methods inherited from class java.lang.Object

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

Field Detail

data

private final short[] data

defaultValue

private final short defaultValue

Constructor Detail

ShortStream

public ShortStream(AbstractDriver driver,
                   String name,
                   short minValue,
                   short maxValue,
                   short zeroValue,
                   short defaultValue,
                   String stringPre,
                   String stringPost,
                   int presentation,
                   int paintStyle,
                   int indexMaxStream,
                   Color colour,
                   boolean summary)

Construct a new GCspy stream of SHORT_TYPE

Parameters:

driver - The driver that owns this Stream

name - The name of the stream (e.g. "Used space")

minValue - The minimum value for any item in this stream. Values less than this will be represented as "minValue-"

maxValue - The maximum value for any item in this stream. Values greater than this will be represented as "maxValue+"

zeroValue - The zero value for this stream

defaultValue - The default value for this stream

stringPre - A string to prefix values (e.g. "Used: ")

stringPost - A string to suffix values (e.g. " bytes.")

presentation - How a stream value is to be presented.

paintStyle - How the value is to be painted.

indexMaxStream - The index of the maximum stream if the presentation is *_VAR.

colour - The default colour for tiles of this stream

summary - Is a summary enabled?

Method Detail

resetData

public void resetData()

Reset all data in this stream to default values.

distribute

public void distribute(int start,
                       short remainder,
                       int blockSize,
                       short value)

Distribute a value across a sequence of tiles. This handles the case when when an object spans two or more tiles and its value is to be attributed to each tile proportionally.

Parameters:

start - the index of the starting tile

remainder - the value left in the starting tile

blockSize - the size of each tile

value - the value to distribute

increment

public void increment(int index,
                      short value)

Increment the value of a tile.

Parameters:

index - the index

value - the increment

send

public void send(int event,
                 int numTiles)

Description copied from class: Stream

Send the data for this stream.

Specified by:

send in class Stream

Parameters:

event - the event.

numTiles - the number of tiles to send (which may be less than maxTileNum)