gnu.java.lang.management

Class VMMemoryMXBeanImpl

java.lang.Object

gnu.java.lang.management.VMMemoryMXBeanImpl

final class VMMemoryMXBeanImpl
extends Object

Constructor Summary

Constructors

Constructor and Description
VMMemoryMXBeanImpl()

Method Summary

Modifier and Type	Method and Description
(package private) static MemoryUsage	getHeapMemoryUsage() Return the sum of the usage in all heap-based pools.
(package private) static MemoryUsage	getNonHeapMemoryUsage() Return the sum of the usage in all non-heap-based pools.
(package private) static int	getObjectPendingFinalizationCount() Return the number of objects waiting for finalization.
private static MemoryUsage	getUsage(boolean immortal) Totals the memory usage from all the pools that are either mortal or immortal.
(package private) static boolean	isVerbose() Returns true if some level of verbosity is on.
(package private) static void	setVerbose(boolean verbose) Turns on or off verbosity.

Methods inherited from class java.lang.Object

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

Constructor Detail

VMMemoryMXBeanImpl

VMMemoryMXBeanImpl()

Method Detail

getHeapMemoryUsage

static MemoryUsage getHeapMemoryUsage()

Return the sum of the usage in all heap-based pools.

Returns:

the memory usage for heap-based pools.

getNonHeapMemoryUsage

static MemoryUsage getNonHeapMemoryUsage()

Return the sum of the usage in all non-heap-based pools.

Returns:

the memory usage for non-heap-based pools.

getObjectPendingFinalizationCount

static int getObjectPendingFinalizationCount()

Return the number of objects waiting for finalization.

Returns:

the number of finalizable objects.

isVerbose

static boolean isVerbose()

Returns true if some level of verbosity is on.

Returns:

true if verbosity is greater than 0.

setVerbose

static void setVerbose(boolean verbose)

Turns on or off verbosity. MMTk has a more detailed level of verbosity, so we simply map true to level 1.

Parameters:

verbose - the new verbosity setting.

getUsage

private static MemoryUsage getUsage(boolean immortal)

Totals the memory usage from all the pools that are either mortal or immortal.

Non-heap pools are immortal, heap pools are non-immortal.

Parameters:

immortal - true if the spaces counted should be immortal.

Returns:

the memory usage overall.