netmap custom RSS and custom packet info

Adrian Chadd adrian.chadd at
Mon Jun 29 23:34:30 UTC 2015

On 29 June 2015 at 12:11, Slawa Olhovchenkov <slw at> wrote:
> On Mon, Jun 29, 2015 at 10:29:14AM -0700, Adrian Chadd wrote:
>> Hi,
>> Turns out there are a class of symmetric RSS Toeplitz keys. Use google
>> to find the paper. :)
> Do someone work on using different RSS keys and hash fields (selecting
> L2/L3/L4 or just L3 hash for example) in FreeBSD?

The -HEAD RSS stuff has a global set of (compiled in) config options
that say whether L2/L3 RSS hashing is enabled. It's more complicated
than that, as the alignment of RSS NIC config, expected RSS hash info
and the tcp/udp pcb table hashing has to align, or weird stuff

It still needs a bunch more work. Unfortunately it's not in my "would
be useful for work" right at the moment, so other things are taking


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