Re: [UPDATE] zerocopy.. While working on ip.h stuff

[David S. Miller]

Benjamin C.R. LaHaise writes:
 > Since the ip header fits in the cache of some CPUs (like the P4),
 > this becoming a cheaper operation than ever before.

At gigapacket rates, it becomes an issue.  This guy is talking about
tinkering with new IP _options_, not just the header.  So even if the
IP header itself fits totally in a cache line, the options afterwardsd
likely will not and thus require another cache miss.

Later,
David S. Miller
[e-mail]