NAPI - ("New API") is a modification to the device driver packet processing framework, which is designed to improve the performance of high-speed networking.
Enabling Linux* Network Support of Hardware Multiqueue Devices
Linux Multiqueue Networking, David S. Miller, 2008
Linux Multiqueue Networking, David S. Miller, 2009
High Speed Network Traffic Analysis with Commodity Multi-core Systems
Linux multi-core scalability, 2009
[PATCH RFC] ethtool: add multiple queue support to {get,set}_ringparams
TNAPI (Threaded NAPI) for packet capturing
RE: Can I limit number of rx queues for igb (and other Intel drivers)?