org.mmtk.utility.statistics
Class EventCounter

java.lang.Object
  org.mmtk.utility.statistics.Counter
      org.mmtk.utility.statistics.EventCounter

public class EventCounter
extends Counter

This class implements a simple event counter (counting number events that occur for each phase).

count

private final long[] count

Instance variables

totalCount

protected long totalCount

running

private boolean running

EventCounter

public EventCounter(String name)

Constructor

Parameters:

name - The name to be associated with this counter

EventCounter

public EventCounter(String name,
                    boolean start)

Constructor

Parameters:

name - The name to be associated with this counter

start - True if this counter is to be implicitly started when startAll() is called (otherwise the counter must be explicitly started).

EventCounter

public EventCounter(String name,
                    boolean start,
                    boolean mergephases)

Constructor

Parameters:

name - The name to be associated with this counter

start - True if this counter is to be implicitly started when startAll() is called (otherwise the counter must be explicitly started).

mergephases - True if this counter does not separately report GC and Mutator phases.

inc

public void inc()

Increment the event counter

inc

public void inc(int value)

Increment the event counter by value

Parameters:

value - The amount by which the counter should be incremented.

start

protected void start()

Start this counter

Specified by:

start in class Counter

stop

protected void stop()

Stop this counter

Specified by:

stop in class Counter

phaseChange

void phaseChange(int oldPhase)

The phase has changed (from GC to mutator or mutator to GC). Take action with respect to the last phase if necessary. Do nothing in this case.

Specified by:

phaseChange in class Counter

Parameters:

oldPhase - The last phase

printCount

protected final void printCount(int phase)

Print the value of this counter for the given phase. Print '0' for false, '1' for true.

Specified by:

printCount in class Counter

Parameters:

phase - The phase to be printed

printCurrent

public final void printCurrent()

Print the current value for this counter (mid-phase)

printTotal

public final void printTotal()

Print the current total for this counter

Specified by:

printTotal in class Counter

printTotal

protected final void printTotal(boolean mutator)

Print the current total for either the mutator or GC phase

Specified by:

printTotal in class Counter

Parameters:

mutator - True if the total for the mutator phases is to be printed (otherwise the total for the GC phases will be printed).

printMin

protected final void printMin(boolean mutator)

Print the current minimum value for either the mutator or GC phase.

Specified by:

printMin in class Counter

Parameters:

mutator - True if the minimum for the mutator phase is to be printed (otherwise the minimum for the GC phase will be printed).

printMax

protected final void printMax(boolean mutator)

Print the current maximum value for either the mutator or GC phase.

Specified by:

printMax in class Counter

Parameters:

mutator - True if the maximum for the mutator phase is to be printed (otherwise the maximum for the GC phase will be printed).

printValue

void printValue(long value)

Print the given value

Parameters:

value - The value to be printed

printLast

public void printLast()

Print statistics for the most recent phase

Overrides:

printLast in class Counter