audionce will easily reach 1Gbps traffic in almost any scenario.
I don't think there is a problem with the CPU. Test conducted using Traffic Generator. The CPU generating to ip package bit high as they produce 4011.
In your 1st post you have mentioned wave2, so I assumed you are using new beta 7.1b4 which uses wifiwave2 impl.
But from your other screenshot I can see you are on stable version.
My question was only regarding wifiwave2.
I am using it as it improves massively range and link stability. Otherwise audience with ros6 is worse than my 7 years old AirPort Extreme which I am looking to decommission- for the better rather than worse.
However under wifiwave2 I have this strange cpu issue which limits my bandwidth to about ~500mbit transfer, tested with iperf