Package org.openjdk.jmh.profile

Class LinuxPerfProfiler

java.lang.Object

org.openjdk.jmh.profile.LinuxPerfProfiler

All Implemented Interfaces:

ExternalProfiler, Profiler

public class LinuxPerfProfiler
extends Object
implements ExternalProfiler

Constructor Summary

Constructors

Constructor	Description
LinuxPerfProfiler(String initLine)

Method Summary

Modifier and Type	Method	Description
Collection<String>	addJVMInvokeOptions(BenchmarkParams params)	Prepend JVM invocation with these commands.
Collection<String>	addJVMOptions(BenchmarkParams params)	Add JVM these options to the run.
Collection<? extends Result>	afterTrial(BenchmarkResult br, long pid, File stdOut, File stdErr)	Run this code after the trial is done.
boolean	allowPrintErr()	If target VM communicates with profiler with standard error, this method can be used to shun the output to console.
boolean	allowPrintOut()	If target VM communicates with profiler with standard output, this method can be used to shun the output to console.
void	beforeTrial(BenchmarkParams params)	Run this code before starting the trial.
String	getDescription()	Human-readable one-line description of the profiler.

Methods inherited from class java.lang.Object

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

Constructor Details

LinuxPerfProfiler

public LinuxPerfProfiler(String initLine)
                  throws ProfilerException

Throws:

ProfilerException

Method Details

addJVMInvokeOptions

public Collection<String> addJVMInvokeOptions(BenchmarkParams params)

Description copied from interface: ExternalProfiler

Prepend JVM invocation with these commands.

Specified by:

addJVMInvokeOptions in interface ExternalProfiler

Parameters:

params - benchmark parameters used for current launch

Returns:

commands to prepend for JVM launch

addJVMOptions

public Collection<String> addJVMOptions(BenchmarkParams params)

Description copied from interface: ExternalProfiler

Add JVM these options to the run.

Specified by:

addJVMOptions in interface ExternalProfiler

Parameters:

params - benchmark parameters used for current launch

Returns:

options to add to JVM launch

beforeTrial

public void beforeTrial(BenchmarkParams params)

Description copied from interface: ExternalProfiler

Run this code before starting the trial. This method will execute before starting the benchmark JVM.

Specified by:

beforeTrial in interface ExternalProfiler

Parameters:

params - benchmark parameters used for current launch

afterTrial

public Collection<? extends Result> afterTrial(BenchmarkResult br,
 long pid,
 File stdOut,
 File stdErr)

Description copied from interface: ExternalProfiler

Run this code after the trial is done. This method will execute after benchmark JVM had stopped.

Specified by:

afterTrial in interface ExternalProfiler

Parameters:

br - benchmark result that was the result of the trial

pid - pid that the forked JVM had

stdOut - file containing the standard output from the benchmark JVM

stdErr - file containing the standard error from the benchmark JVM

Returns:

profiler results

allowPrintOut

public boolean allowPrintOut()

Description copied from interface: ExternalProfiler

If target VM communicates with profiler with standard output, this method can be used to shun the output to console. Profiler is responsible for consuming the standard output and printing the relevant data from there.

Specified by:

allowPrintOut in interface ExternalProfiler

Returns:

returns true, if profiler allows harness to print out the standard output

allowPrintErr

public boolean allowPrintErr()

Description copied from interface: ExternalProfiler

If target VM communicates with profiler with standard error, this method can be used to shun the output to console. Profiler is responsible for consuming the standard error and printing the relevant data from there.

Specified by:

allowPrintErr in interface ExternalProfiler

Returns:

returns true, if profiler allows harness to print out the standard errpr

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