util
Class StackSampler

java.lang.Object
  util.Sampler
      util.StackSampler

All Implemented Interfaces:

Runnable

public class StackSampler
extends Sampler

A minimal pure Java sampling profiler. Due to biased placement of yield points. Samples will be biased towards code that contains many such points [1]. Can't do much about this problem with a pure Java sampler. [1] Mytkowicz, Diwan, Hauswirth, Sweeney. "Evaluating the Accuracy of Java Profilers." PLDI 2010

Field Summary

static String

includeMethodName Only include stack traces that contain this method name.

Constructor Summary

protected

StackSampler(int intervalMillis)

Method Summary

protected StackStatistics	dumpSamples() Returns the statistics associated with this sampler.
protected void	sample() Takes a sample at the interval.
static Sampler	start(int interval) Start sampling with this sampler.

Methods inherited from class util.Sampler

run, start, stop

Methods inherited from class java.lang.Object

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

Field Detail

includeMethodName

public static final String includeMethodName

Only include stack traces that contain this method name.

See Also:

Constant Field Values

Constructor Detail

StackSampler

protected StackSampler(int intervalMillis)

Method Detail

sample

protected void sample()

Description copied from class: Sampler

Takes a sample at the interval.

Specified by:

sample in class Sampler

dumpSamples

protected StackStatistics dumpSamples()

Description copied from class: Sampler

Returns the statistics associated with this sampler.

Specified by:

dumpSamples in class Sampler

Returns:

statistics

start

public static Sampler start(int interval)

Start sampling with this sampler.

Parameters:

interval - sample interval in milliseconds

Returns:

a sampler