org.openjdk.jmh.runner

Class CompilerHints

java.lang.Object

org.openjdk.jmh.runner.CompilerHints

public class CompilerHints
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static String	LIST

Method Summary

Modifier and Type	Method and Description
static void	addCompilerHints(List<String> command) We need to generate a compiler hints file such that it includes: No compile command files are specified and no .hotspotrc file is available, then do JMH hints only No compile command files are specified and .hotspotrc file is available, then do JMH hints + .hotspotrc 1 to N compile command files are specified, then do JMH hints + all specified hints in files
static CompilerHints	defaultList()
static CompilerHints	fromFile(String file)
static CompilerHints	fromResource(String resource)
Set<String>	get()
static List<String>	getCompileCommandFiles(List<String> command)
protected List<Reader>	getReaders() Helper method for creating a Reader for the list file.
static String	hintsFile()
static void	printBlackholeMode(PrintStream out)

Methods inherited from class java.lang.Object

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

Field Detail

LIST

public static final String LIST

See Also:

Constant Field Values

Method Detail

defaultList

public static CompilerHints defaultList()

hintsFile

public static String hintsFile()

fromResource

public static CompilerHints fromResource(String resource)

fromFile

public static CompilerHints fromFile(String file)

get

public Set<String> get()

getCompileCommandFiles

public static List<String> getCompileCommandFiles(List<String> command)

Parameters:

command - command arguments list

Returns:

the compiler hint files specified by the command

addCompilerHints

public static void addCompilerHints(List<String> command)

We need to generate a compiler hints file such that it includes:

• No compile command files are specified and no .hotspotrc file is available, then do JMH hints only
• No compile command files are specified and .hotspotrc file is available, then do JMH hints + .hotspotrc
• 1 to N compile command files are specified, then do JMH hints + all specified hints in files

This is a departure from default JVM behavior as the JVM would normally just take the last hints file and ignore the rest.

Parameters:

command - all -XX:CompileCommandLine args will be removed and a merged file will be set

printBlackholeMode

public static void printBlackholeMode(PrintStream out)

getReaders

protected List<Reader> getReaders()

Helper method for creating a Reader for the list file.

Returns:

a correct Reader instance