http://www.ntop.org/products/pf_ring/
http://www.ntop.org/support/documentation/
http://www.ntop.org/products/pf_ring/dna/
http://www.ntop.org/pf_ring/benchmarking-pf_ring-dna/
(good coverage of PF_RING DNA –> use of hardware + zerocopy feature for direct access).
http://wiki.aanval.com/wiki/Netmap
http://info.iet.unipi.it/~luigi/netmap/
USENIX best paper: