Package org.openjdk.jmh.profile

Class GCProfiler.VMSupport

java.lang.Object

org.openjdk.jmh.profile.GCProfiler.VMSupport

Enclosing class:

GCProfiler

static class GCProfiler.VMSupport
extends java.lang.Object

This class encapsulates any platform-specific functionality. It is supposed to gracefully fail if some functionality is not available. This class resolves most special classes via Reflection to enable building against a standard JDK.

Field Summary

Fields

Modifier and Type	Field	Description
private static boolean	ALLOC_AVAILABLE
private static java.lang.management.ThreadMXBean	ALLOC_MX_BEAN
private static java.lang.reflect.Method	ALLOC_MX_BEAN_GETTER
private static Multiset<java.lang.String>	churn
private static boolean	CHURN_AVAILABLE
private static javax.management.NotificationListener	listener

Constructor Summary

Constructors

Constructor	Description
VMSupport()

Method Summary

Modifier and Type	Method	Description
static void	finishChurnProfile()
private static long[]	getAllocatedBytes(long[] threadIds)
static Multiset<java.lang.String>	getChurn()
static GCProfiler.HotspotAllocationSnapshot	getSnapshot()
private static javax.management.NotificationListener	newListener()
static void	startChurnProfile()
private static boolean	tryInitAlloc()
private static boolean	tryInitChurn()

Methods inherited from class java.lang.Object

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

Field Detail

ALLOC_AVAILABLE

private static final boolean ALLOC_AVAILABLE

ALLOC_MX_BEAN

private static java.lang.management.ThreadMXBean ALLOC_MX_BEAN

ALLOC_MX_BEAN_GETTER

private static java.lang.reflect.Method ALLOC_MX_BEAN_GETTER

CHURN_AVAILABLE

private static final boolean CHURN_AVAILABLE

listener

private static javax.management.NotificationListener listener

churn

private static Multiset<java.lang.String> churn

Constructor Detail

VMSupport

VMSupport()

Method Detail

tryInitAlloc

private static boolean tryInitAlloc()

tryInitChurn

private static boolean tryInitChurn()

getAllocatedBytes

private static long[] getAllocatedBytes(long[] threadIds)

newListener

private static javax.management.NotificationListener newListener()

getSnapshot

public static GCProfiler.HotspotAllocationSnapshot getSnapshot()

startChurnProfile

public static void startChurnProfile()

finishChurnProfile

public static void finishChurnProfile()

getChurn

public static Multiset<java.lang.String> getChurn()