Class StackProfiler

java.lang.Object

org.openjdk.jmh.profile.StackProfiler

All Implemented Interfaces:

InternalProfiler, Profiler

public class StackProfiler
extends Object
implements InternalProfiler

Very basic and naive stack profiler.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	StackProfiler.SamplingTask
private static class	StackProfiler.StackRecord
static class	StackProfiler.StackResult
static class	StackProfiler.StackResultAggregator

Field Summary

Fields

Modifier and Type	Field	Description
private final Set<String>	excludePackageNames
private static final String[]	IGNORED_THREADS	Threads to ignore (known system and harness threads)
private final int	periodMsec
private final boolean	sampleLine
private StackProfiler.SamplingTask	samplingTask
private final int	stackLines
private final int	topStacks

Constructor Summary

Constructors

Constructor	Description
StackProfiler(String initLine)

Method Summary

Modifier and Type	Method	Description
Collection<? extends Result>	afterIteration(BenchmarkParams benchmarkParams, IterationParams iterationParams, IterationResult result)	Run this code after a benchmark iteration finished
void	beforeIteration(BenchmarkParams benchmarkParams, IterationParams iterationParams)	Run this code before starting the next benchmark iteration.
(package private) static String	dottedLine(String header)
String	getDescription()	Human-readable one-line description of the profiler.

Methods inherited from class Object

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

Field Details

IGNORED_THREADS

private static final String[] IGNORED_THREADS

Threads to ignore (known system and harness threads)

stackLines

private final int stackLines

topStacks

private final int topStacks

periodMsec

private final int periodMsec

sampleLine

private final boolean sampleLine

excludePackageNames

private final Set<String> excludePackageNames

samplingTask

private volatile StackProfiler.SamplingTask samplingTask

Constructor Details

StackProfiler

public StackProfiler(String initLine)
              throws ProfilerException

Throws:

ProfilerException

Method Details

beforeIteration

public void beforeIteration(BenchmarkParams benchmarkParams,
 IterationParams iterationParams)

Description copied from interface: InternalProfiler

Run this code before starting the next benchmark iteration.

Specified by:

beforeIteration in interface InternalProfiler

Parameters:

benchmarkParams - benchmark parameters used for current launch

iterationParams - iteration parameters used for current launch

afterIteration

public Collection<? extends Result> afterIteration(BenchmarkParams benchmarkParams,
 IterationParams iterationParams,
 IterationResult result)

Description copied from interface: InternalProfiler

Run this code after a benchmark iteration finished

Specified by:

afterIteration in interface InternalProfiler

Parameters:

benchmarkParams - benchmark parameters used for current launch

iterationParams - iteration parameters used for current launch

result - iteration result

Returns:

profiler results

getDescription

public String getDescription()

Description copied from interface: Profiler

Human-readable one-line description of the profiler.

Specified by:

getDescription in interface Profiler

Returns:

description

dottedLine

static String dottedLine(String header)