> > Yeah, we have the same thing in Snort but it took me quite a while to > > realize it. My first guess was if they were going to bother doing the > > TCP chksumming in hardware, they would be offloading IP too but so > > much for intuition :-)
processors crunch protocol logic pretty well. what they don't do well is access data (cache miss latencies and all that). so, the biggest bang for the buck is for a NIC to offload those things that host cpus do poorly. hence, offloading the TCP checksum. however, IP checksum is much shorter - you would do more work to communicate the need to the NIC than you would computing the checksum in the first place. rick jones -- Wisdom Teeth are impacted, people are affected by the effects of events. these opinions are mine, all mine; HP might not want them anyway... :) feel free to post, OR email to raj in cup.hp.com but NOT BOTH... - This is the TCPDUMP workers list. It is archived at http://www.tcpdump.org/lists/workers/index.html To unsubscribe use mailto:[EMAIL PROTECTED]?body=unsubscribe
