org.nustaq.kontraktor.impl

Class BackOffStrategy

java.lang.Object

org.nustaq.kontraktor.impl.BackOffStrategy

public class BackOffStrategy
extends Object

Created by moelrue on 06.05.2014. Kontraktor uses spinlocking. By adjusting the backofstrategy values one can define the tradeoff regarding latency/idle CPU load. if a message queue is empty, first busy spin is used for N iterations, then Thread.yield, then LockSupport.park, then sleep(nanosToPark)

Constructor Summary

Constructors

Constructor and Description
BackOffStrategy()
BackOffStrategy(int spinUntilYield, int yieldUntilPark, int parkUntilSleep)

Method Summary

Modifier and Type	Method and Description
int	getNanosToPark()
boolean	isSleeping(int yieldCount)
boolean	isYielding(int count)
void	setCounters(int spinUntilYield, int yieldUntilPark, int parkUntilSleep)
void	setNanosToPark(int nanosToPark)
void	yield(int count)

Methods inherited from class java.lang.Object

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

Constructor Detail

BackOffStrategy

public BackOffStrategy()

BackOffStrategy

public BackOffStrategy(int spinUntilYield,
                       int yieldUntilPark,
                       int parkUntilSleep)

Parameters:

spinUntilYield - - number of busy spins until Thread.yield is used

yieldUntilPark - - number of Thread.yield iterations until parkNanos(1) is used

parkUntilSleep - - number of parkNanos(1) is used until park(nanosToPark) is used. Default for nanosToPark is 0.5 milliseconds

Method Detail

setCounters

public void setCounters(int spinUntilYield,
                        int yieldUntilPark,
                        int parkUntilSleep)

getNanosToPark

public int getNanosToPark()

setNanosToPark

public void setNanosToPark(int nanosToPark)

yield

public void yield(int count)

isSleeping

public boolean isSleeping(int yieldCount)

isYielding

public boolean isYielding(int count)