com.oracle.svm.core

Class Containers

java.lang.Object

com.oracle.svm.core.Containers

public class Containers
extends Object

Provides container awareness to the rest of the VM. The implementation is based on the Container Metrics API from JDK 17.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Containers.Options

Field Summary

Fields

Modifier and Type	Field and Description
static int	UNKNOWN Sentinel used when the value is unknown.

Constructor Summary

Constructors

Constructor and Description
Containers()

Method Summary

Modifier and Type	Method and Description
static int	activeProcessorCount() Calculates an appropriate number of active processors for the VM to use.
static long	memoryLimitInBytes() Returns the limit of available memory for this process.

Methods inherited from class java.lang.Object

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

Field Detail

UNKNOWN

public static final int UNKNOWN

Sentinel used when the value is unknown.

See Also:

Constant Field Values

Constructor Detail

Containers

public Containers()

Method Detail

activeProcessorCount

public static int activeProcessorCount()

Calculates an appropriate number of active processors for the VM to use. The calculation is based on these three inputs:

• cpu affinity
• cpu quota & cpu period
• cpu shares

Returns:

number of CPUs

memoryLimitInBytes

public static long memoryLimitInBytes()

Returns the limit of available memory for this process.

Returns:

memory limit in bytes or Containers.UNKNOWN