From: Jesper Dangaard Brouer

Sent: 15 January 2016 13:22

...

I want to do some instruction-cache level optimizations.

What do I mean by that...

The kernel network stack code path (a packet travels) is obviously
larger than the instruction-cache (icache).  Today, every packet
travel individually through the network stack, experiencing the exact
same icache misses (as the previous packet).

...

Is that actually true for modern server processors that have large i-cache.
While the total size of the networking code may well be larger, that
part used for transmitting data packets will be much be smaller and
could easily fit in the icache.

	David