[Sephiroth]

Here's what I posted in the VM Forum:

1/
The PUMA 6 CPU is of low spec (single core) and is thus heavily utilised because all of the traffic on a segment hits it and is filtered through by your own security key generated when the modem is switched on.

2/
The processor and associated memory is so overloaded that every 20 to 30 seconds it does an emergency interrupt to clear its cache and so on. This will stop some games in their tracks.

3/
Every second, the TBB BQM system, for those subscribing, makes an ICMP call (you can Google that) to your router. This call has to be handled hitherto by the Puma 6 chip.

4/
The yellow portion of the graph is very misleading. It is a maximum latency measure. So that in any 30 second period, you might get 25 of those ICMP pings being serviced in around 10 to 20 milliseconds; when the Puma 6 chip interrupts, the ping round trip time rises and it is this maximum that is recorded in the BQM as the yellow area. The blue average area remains relatively unpurturbed.

5/
The new firmware displaces processing of ICMP packets from the Puma 6 into the AR9382 chip. A clever dodge which shows a nice BQM graph, but isn't even the tip of the iceberg when it comes to load that remains on the Puma 6.