jhalterman

/**
 * An exponentially weighted moving average implementation that decays based on the elapsed time since the last update,
 * approximating a time windowed moving average.
 */
public class MovingAverage {
  private final long windowNanos;

  // Mutable state
  private volatile long lastNanos;
  private volatile double average;

trongthanh

#Refer: http://www.linuxfoundation.org/collaborate/workgroups/networking/netem#Delaying_only_some_traffic
#Refer: http://www.bomisofmab.com/blog/?p=100
#Refer: http://drija.com/linux/41983/simulating-a-low-bandwidth-high-latency-network-connection-on-linux/
#Setup the rate control and delay
sudo tc qdisc add dev lo root handle 1: htb default 12 
sudo tc class add dev lo parent 1:1 classid 1:12 htb rate 56kbps ceil 128kbps 
sudo tc qdisc add dev lo parent 1:12 netem delay 200ms

#Remove the rate control/delay
sudo tc qdisc del dev lo root