Re: Hardware IP checksums

[Artur Skawina <skawina@xxxxxxxxxxxxx>]

> It appeared pretty useless. Jes noticed this first time,
> I had to check this experimentally, and yes... No visible improvements.
> HW checksum on transmit looks really not useful without zero copy.

for example on p2 the extra checksumming cost (vs a plain copy) is ~7%,
and that's the worst case, ie everything cached. Add cache misses and
the difference won't be visible...