seda.sandStorm.internal
Class StageStats

java.lang.Object
  seda.sandStorm.internal.StageStats

All Implemented Interfaces:

StageStatsIF

public class StageStats
extends java.lang.Object
implements StageStatsIF

This class provides controllers with a view of statistics gathered by the stage internally during execution.

Field Summary

private int	count
private long	cumulativeEvents
private static boolean	DEBUG
private static int	ESTIMATION_SIZE
private static long	ESTIMATION_TIME
private boolean	first
private long	lastTime
private static boolean	PROFILE
private double	rt90thPercentile
private double	serviceRate
private static double	SMOOTH_ALPHA
(package private) StageWrapperIF	stage
private long	totalEvents
private long	totalServiceTime

Constructor Summary

StageStats(StageWrapperIF stage)

Method Summary

double	get90thRT() Get 90th percentile response time in msec.
double	getServiceRate() Return a moving average of the service rate.
long	getTotalEvents() Get total number of processed events.
void	record90thRT(double rt_sample) Record 90th percentile response time in msec.
void	recordServiceRate(int numEvents, long time) Record the service time for numEvents taking 'time' msec to be processed.
void	reset() Reset all statistics.

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

PROFILE

private static final boolean PROFILE

See Also:

Constant Field Values

SMOOTH_ALPHA

private static final double SMOOTH_ALPHA

See Also:

Constant Field Values

ESTIMATION_SIZE

private static final int ESTIMATION_SIZE

See Also:

Constant Field Values

ESTIMATION_TIME

private static final long ESTIMATION_TIME

See Also:

Constant Field Values

stage

StageWrapperIF stage

serviceRate

private double serviceRate

rt90thPercentile

private double rt90thPercentile

first

private boolean first

lastTime

private long lastTime

count

private int count

totalServiceTime

private long totalServiceTime

totalEvents

private long totalEvents

cumulativeEvents

private long cumulativeEvents

Constructor Detail

StageStats

public StageStats(StageWrapperIF stage)

Method Detail

reset

public void reset()

Reset all statistics.

Specified by:

reset in interface StageStatsIF

getServiceRate

public double getServiceRate()

Return a moving average of the service rate.

Specified by:

getServiceRate in interface StageStatsIF

getTotalEvents

public long getTotalEvents()

Get total number of processed events.

Specified by:

getTotalEvents in interface StageStatsIF

recordServiceRate

public void recordServiceRate(int numEvents,
                              long time)

Record the service time for numEvents taking 'time' msec to be processed.

Specified by:

recordServiceRate in interface StageStatsIF

record90thRT

public void record90thRT(double rt_sample)

Record 90th percentile response time in msec.

Specified by:

record90thRT in interface StageStatsIF

get90thRT

public double get90thRT()

Get 90th percentile response time in msec.

Specified by:

get90thRT in interface StageStatsIF