On Mon, 26 Feb 2001, David S. Miller wrote:
> 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.
Hmmm, one way around this is to have the packet queue store things in
in a linear array of pointers to data areas, then process things in
bursts, ie:
- find packet data areas for queued packets
- walk list doing prefetches of ip header and options
- then actually do the packet processing (save output for later)
That will require a number of new hooks for pipelining operations, though.
Just a thought.
-ben
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