One way to do a test is to bittorrent something legal, say an Ubuntu DVD. If you use a transmission client (e.g.), you can change the upload speed of your clie

One way to do a test is to bittorrent something legal, say an Ubuntu DVD. If you use a transmission client (e.g.), you can change the upload speed of your client. Do one test at a low upload speed (5K/second), and one test just above your ISP's advertised upload speed. In the first case you should see your speed peak out around 850mb/s. In the second, if you have a bufferbloat situation, the download speed will drop significantly as the uploads push the download acks into a queue, forcing TCP to throttle heavily downwards.