Having trouble achieving 1Gbit UDP throughput

Question

For UDP packets with a payload less then 1470, is it possible to achieve 1Gbit throughput? Due to the small packet size, there should be some bottlenecks in achieving such t

Answer 1

I've found hardware has a significantly lower packet-per-second limit than the networks theoretical capacity. For a Broadcomm BCM5704S I hit this at 69,000 pps compared to 1,488,100pps of gigabit.

Some more numbers I reported here, http://code.google.com/p/openpgm/