deepnetts.util

Class PhysicalCores

java.lang.Object

deepnetts.util.PhysicalCores

public class PhysicalCores
extends Object

Static utility class for finding the number of physical CPU cores.

Method Summary

Modifier and Type	Method and Description
static Integer	physicalCoreCount() Returns the number of "physical" hardware threads available.

Methods inherited from class java.lang.Object

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

Method Detail

physicalCoreCount

public static Integer physicalCoreCount()

Returns the number of "physical" hardware threads available. On a machien with hyper threading, this value may be less than the number reported by Runtime.availableProcessors(). If you are running on a virtual machine, the value returned will be the number of cores assigned to the VM, not the actual number of physical cores on the machine. Likewise, if the number of cores available to this process is less than the installed number, the available number will be returned.

The first call to the method may take a long time, especially on Windows. Subsequent calls will return a cached value. The method is threadsafe.

Returns:

number of physical cores, or null if it could not be determined