Hmm - I think your pictures explains a few things. Your input traffic is based on SPAN (assumption on my behalf) and contains a lot of overhead traffic that the AMD has to process. This is the quality that it complains about.
Effectively you cn kill an AMD with garbage traffic since it first needs to filter out all unwanted traffic before it can get to the "interesting" parts. If you have very poor traffic, all power will be used to clean the traffic and then no (or little) capacity is left to process the traffic you want.
But still - what driver are you using and is this a physical or virtual machine?
OK - I'm still in doubt about the quality of the network traffic which takes it's toll on the AMD.
If you get the packet broker to hadnle this, you will free up resources to (hopefully) process the valid packets to get to the data you want.
I'm not clear why you have the missing sessions.
What version are you on?