org.openjdk.jmc.flightrecorder.rules.jdk.dataproviders

Class HaltsProvider

java.lang.Object

org.openjdk.jmc.flightrecorder.rules.jdk.dataproviders.HaltsProvider

public class HaltsProvider
extends Object

Helper class with useful methods for calculating various data about JVM halts (GC pauses, thread dumps and so on).

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	HaltsProvider.ApplicationHaltsInfoHolder

Constructor Summary

Constructors

Constructor and Description
HaltsProvider()

Method Summary

Modifier and Type	Method and Description
static SlidingWindowToolkit.IUnorderedWindowValueFunction<HaltsProvider.ApplicationHaltsInfoHolder>	applicationHaltsRatioFunction()
static HaltsProvider.ApplicationHaltsInfoHolder	calculateApplicationHaltsRatio(IItemCollection items) Calculates the ratio of all application pauses to the total time.
static IQuantity	calculateGcHaltsRatio(IItemCollection items, IQuantity startTime, IQuantity endTime) Calculates the ratio of GC pauses to the total time.
static IQuantity	calculateGcPauseRatio(IItemCollection items) Calculates the ratio of GC pauses to the total time.
static SlidingWindowToolkit.IUnorderedWindowValueFunction<IQuantity>	gcHaltsRatioFunction()

Methods inherited from class java.lang.Object

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

Constructor Detail

HaltsProvider

public HaltsProvider()

Method Detail

calculateGcPauseRatio

public static IQuantity calculateGcPauseRatio(IItemCollection items)

Calculates the ratio of GC pauses to the total time.

Parameters:

items - items to do calculation on

Returns:

GC/total ratio in percent

calculateGcHaltsRatio

public static IQuantity calculateGcHaltsRatio(IItemCollection items,
                                              IQuantity startTime,
                                              IQuantity endTime)

Calculates the ratio of GC pauses to the total time.

Parameters:

items - items to do calculation on

startTime - start of timespan to do calculation in

endTime - end of timespan to do calculation in

Returns:

GC/total ratio in percent

calculateApplicationHaltsRatio

public static HaltsProvider.ApplicationHaltsInfoHolder calculateApplicationHaltsRatio(IItemCollection items)

Calculates the ratio of all application pauses to the total time.

Parameters:

items - items to do calculation on

Returns:

pauses/total ratio in percent

gcHaltsRatioFunction

public static SlidingWindowToolkit.IUnorderedWindowValueFunction<IQuantity> gcHaltsRatioFunction()

Returns:

function to use when calculating GC halts using sliding windows

applicationHaltsRatioFunction

public static SlidingWindowToolkit.IUnorderedWindowValueFunction<HaltsProvider.ApplicationHaltsInfoHolder> applicationHaltsRatioFunction()

Returns:

function to use when calculating application halts using sliding windows