Impressive indeed.  One concession to performance that had to made in the
ep93xx ethernet driver is that the MAC had the requirement of buffers
being at an aligned-by-4-byte address and it seems the default mbuf data
area is only aligned by 2 bytes.  On packets for transmit that aren't in a
mbuf cluster, one has to copy the entire mbuf chain.

//Jesse Off

> A NetBSD port is achieving 80Mbps IP routing.  With the humble
> 166MHz ARM9 core IP routing is smart enough by off-the-shelf
> protocol stack and unoptimized plain straightforward Ethernet
> driver.  More turning is expected.
>
> Toru Nishimura/ALKYL Technology, a NetBSD company
>
>