Statistics (Jikes RVM API)

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org.mmtk.vm
Class Statistics

java.lang.Object
  org.mmtk.vm.Statistics

Direct Known Subclasses:: Statistics

public abstract class Statistics
extends Object
extends Object

Constructor Summary
`Statistics()`

Method Summary
`abstract long`	`cycles()` Read the cycle counter
`abstract int`	`getCollectionCount()` Returns the number of collections that have occurred.
`abstract long`	`millisToNanos(double t)` Convert milliseconds to nanoseconds
`abstract double`	`nanosToMillis(long c)` Convert nanoseconds to milliseconds
`abstract double`	`nanosToSecs(long c)` Convert nanoseconds to seconds
`abstract long`	`nanoTime()` Read cycle counter
`abstract void`	`perfCtrInit(int metric)` Initialize performance counters
`abstract long`	`perfCtrReadCycles()` Read the current cycle count from the perfctr libraries
`abstract long`	`perfCtrReadMetric()` Read the current event count for the metric being measured by the perfctr libraries
`abstract long`	`secsToNanos(double t)` Convert seconds to nanoseconds

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

Statistics

public Statistics()

Method Detail

getCollectionCount

public abstract int getCollectionCount()

Returns the number of collections that have occurred.

Returns:: The number of collections that have occurred.

nanoTime

public abstract long nanoTime()

Read cycle counter

nanosToMillis

public abstract double nanosToMillis(long c)

Convert nanoseconds to milliseconds

nanosToSecs

public abstract double nanosToSecs(long c)

Convert nanoseconds to seconds

millisToNanos

public abstract long millisToNanos(double t)

Convert milliseconds to nanoseconds

secsToNanos

public abstract long secsToNanos(double t)

Convert seconds to nanoseconds

cycles

public abstract long cycles()

Read the cycle counter

perfCtrInit

public abstract void perfCtrInit(int metric)

Initialize performance counters

Parameters:: metric - An integer identifying the metric being read

perfCtrReadCycles

public abstract long perfCtrReadCycles()

Read the current cycle count from the perfctr libraries

Returns:: the current cycle count from the perfctr libraries

perfCtrReadMetric

public abstract long perfCtrReadMetric()

Read the current event count for the metric being measured by the perfctr libraries

Returns:: the current event count for the metric being measured by the perfctr libraries