Class LinuxNuma

java.lang.Object

ca.spottedleaf.concurrentutil.numa.OSNuma.PreCalculatedNuma

ca.spottedleaf.concurrentutil.numa.LinuxNuma

All Implemented Interfaces:

OSNuma

public final class LinuxNuma
extends OSNuma.PreCalculatedNuma

Nested Class Summary

Nested classes/interfaces inherited from interface OSNuma

OSNuma.NoOp, OSNuma.PreCalculatedNuma

Field Summary

Fields

Modifier and Type	Field	Description
static final LinuxNuma	INSTANCE

Fields inherited from interface OSNuma

NUMA_DISTANCE_CANNOT_DETERMINE

Method Summary

Modifier and Type	Method	Description
int	getCurrentCore()	Returns the current core that this thread is running on.
long[]	getCurrentThreadAffinity()	Returns the current thread's affinity mask.
boolean	isAvailable()	Returns whether interaction with the OS for NUMA is available.
void	setCurrentThreadAffinity(long[] to)	Attempts to adjust the current thread's affinity mask to the specified bitset.

Methods inherited from class OSNuma.PreCalculatedNuma

getCores, getCurrentNumaNode, getNodeDistances, getNumaDistance, getNumaNode, getTotalCores, getTotalNumaNodes

Methods inherited from class Object

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

Methods inherited from interface OSNuma

setCurrentNumaAffinity, setCurrentNumaAffinity

Field Details

INSTANCE

public static final LinuxNuma INSTANCE

Method Details

isAvailable

public boolean isAvailable()

Description copied from interface: OSNuma

Returns whether interaction with the OS for NUMA is available. If no interaction is available, then the following applies:

• There exists only one NUMA node including all the available processors.
• Scheduling affinity methods will throw UnsupportedOperationException

Returns:

Whether there exists native support to retrieve NUMA information and set scheduling affinity.

getCurrentCore

public int getCurrentCore()

Description copied from interface: OSNuma

Returns the current core that this thread is running on. If NUMA interaction is not available, then 0 will be returned.

Returns:

The current core this thread is running on

See Also:

• OSNuma.isAvailable()

getCurrentThreadAffinity

public long[] getCurrentThreadAffinity()

Description copied from interface: OSNuma

Returns the current thread's affinity mask. If NUMA interaction is not available, then this function will return an undefined result.

Returns:

The current thread's affinity mask.

See Also:

• OSNuma.isAvailable()

setCurrentThreadAffinity

public void setCurrentThreadAffinity(long[] to)

Description copied from interface: OSNuma

Attempts to adjust the current thread's affinity mask to the specified bitset. If NUMA interaction is not available, then this function is a no-op.

Parameters:

to - Specified new affinity bitmask.

See Also:

• OSNuma.isAvailable()