meka.core

Class ThreadUtils

java.lang.Object

meka.core.ThreadUtils

public class ThreadUtils
extends Object

Thread and multi-process related methods.

Version:

$Revision$

Author:

FracPete (fracpete at waikato dot ac dot nz)

Field Summary

Fields

Modifier and Type	Field and Description
static int	ALL whether to use all available cores.
static int	SEQUENTIAL the number of threads used to be considered sequential.

Constructor Summary

Constructors

Constructor and Description
ThreadUtils()

Method Summary

Modifier and Type	Method and Description
static int	getActualNumThreads(int numThreads, int maxThreads) Calculates the number of threads to use.
static int	getAvailableProcessors() Returns the available number of processors on the machine.
static boolean	isMultiThreaded(int numThreads) Returns whether the number of threads represent a multi-threaded setup.

Methods inherited from class java.lang.Object

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

Field Detail

ALL

public static final int ALL

whether to use all available cores.

See Also:

Constant Field Values

SEQUENTIAL

public static final int SEQUENTIAL

the number of threads used to be considered sequential.

See Also:

Constant Field Values

Constructor Detail

ThreadUtils

public ThreadUtils()

Method Detail

getAvailableProcessors

public static int getAvailableProcessors()

Returns the available number of processors on the machine.

Returns:

the number of processors

getActualNumThreads

public static int getActualNumThreads(int numThreads,
                                      int maxThreads)

Calculates the number of threads to use.

Parameters:

numThreads - the requested number of threads (-1 for # of cores/cpus)

maxThreads - the maximum to ask for

Returns:

the actual number of threads to use, (1 = single thread)

isMultiThreaded

public static boolean isMultiThreaded(int numThreads)

Returns whether the number of threads represent a multi-threaded setup.

Parameters:

numThreads - the number of threads

Returns:

true if multi-threaded