org.apache.hudi.common.util.jvm

Class HotSpotMemoryLayoutSpecification64bit

java.lang.Object

org.apache.hudi.common.util.jvm.HotSpotMemoryLayoutSpecification64bit

All Implemented Interfaces:

MemoryLayoutSpecification

public class HotSpotMemoryLayoutSpecification64bit
extends Object
implements MemoryLayoutSpecification

Implementation of MemoryLayoutSpecification based on Hot Spot Memory Layout Specification on 64-bit.

Constructor Summary

Constructors

Constructor and Description
HotSpotMemoryLayoutSpecification64bit()

Method Summary

Modifier and Type	Method and Description
int	getArrayHeaderSize() Returns the fixed overhead of an array of any type or length in this JVM.
int	getObjectHeaderSize() Returns the fixed overhead of for any Object subclass in this JVM.
int	getObjectPadding() Returns the quantum field size for a field owned by an object in this JVM.
int	getReferenceSize() Returns the fixed size of an object reference in this JVM.
int	getSuperclassFieldPadding() Returns the quantum field size for a field owned by one of an object's ancestor superclasses in this JVM.

Methods inherited from class java.lang.Object

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

Constructor Detail

HotSpotMemoryLayoutSpecification64bit

public HotSpotMemoryLayoutSpecification64bit()

Method Detail

getArrayHeaderSize

public int getArrayHeaderSize()

Description copied from interface: MemoryLayoutSpecification

Returns the fixed overhead of an array of any type or length in this JVM.

Specified by:

getArrayHeaderSize in interface MemoryLayoutSpecification

Returns:

the fixed overhead of an array.

getObjectHeaderSize

public int getObjectHeaderSize()

Description copied from interface: MemoryLayoutSpecification

Returns the fixed overhead of for any Object subclass in this JVM.

Specified by:

getObjectHeaderSize in interface MemoryLayoutSpecification

Returns:

the fixed overhead of any object.

getObjectPadding

public int getObjectPadding()

Description copied from interface: MemoryLayoutSpecification

Returns the quantum field size for a field owned by an object in this JVM.

Specified by:

getObjectPadding in interface MemoryLayoutSpecification

Returns:

the quantum field size for an object.

getReferenceSize

public int getReferenceSize()

Description copied from interface: MemoryLayoutSpecification

Returns the fixed size of an object reference in this JVM.

Specified by:

getReferenceSize in interface MemoryLayoutSpecification

Returns:

the size of all object references.

getSuperclassFieldPadding

public int getSuperclassFieldPadding()

Description copied from interface: MemoryLayoutSpecification

Returns the quantum field size for a field owned by one of an object's ancestor superclasses in this JVM.

Specified by:

getSuperclassFieldPadding in interface MemoryLayoutSpecification

Returns:

the quantum field size for a superclass field.