2ping 1.2 has been released, adding ping-style mdev/ewma statistics:

  • Added exponentially-weighted moving average (ewma) and moving standard deviation (mdev) statistics to the summary display

2ping is a bi-directional ping utility. It uses 3-way pings (akin to TCP SYN, SYN/ACK, ACK) and after-the-fact state comparison between a 2ping listener and a 2ping client to determine which direction packet loss occurs.