> The figures I quoted for the no-hw-checksum case were still
> using scatter/gather. That can be turned off as well and
> it makes it a tiny bit quicker.
Hmm. Are you sure the differences are not just noise? Unless you
modified the zerocopy patch yourself, it won't use SG without
In fact it would be interesting to revert that policy and
see how much SG alone helps. Probably not much, since the
CPU checksumming is close to onecopy.
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