After upgrading to Ubuntu 14.04 I started noticing short but consistent spikes in my daily internet usage (It became most apparent when playing online games through Steam). These spikes occur every ~2 minutes or so and last a few seconds after which everything goes back to acceptable speeds.

When using the ping command against my router I get tons of packets that takes 0.4 to 0.8 ms which is fine. Then when these spikes occur I get roughly 10 packets, all of which takes 200-350 (or more) ms. The thing is that this didn't happen at all with Ubuntu 13.10, I should probably also mention that I'm using internet over Wi-Fi.

I've tried to identify the source of these spikes with nethogs, iftop, wireshark, etherape and whatnot without much success (I've never had to track down similar problems so I might be looking at things incorrectly). Any idea what might be causing this?