netmap: traffic distribution

[chintu hetam]

As far as i know, flow director is Intel terminology it addresses both RSS
and RFS. I think FreeBSD implementation is RFS.

Luigi, you touched upon SW de-multiplexer, i would like to know why it's
necessary.
let say i have 82599 ixgbe driver (RSS enabled)configured with 5 tuple
hash. My application reads from netmap queue 0-7(1-8), for testing purpose
i will define tuples in such a way that i know for sure that each packet
will be filtered to specific hw queue(0-7). Now is it safe to assume that
in netmap mode in user space i will receive the packet as in ixgbe hw queue?

Michio, reason i asked for performance values
http://arxiv.org/ftp/arxiv/papers/1106/1106.0443.pdf
I would like to test the accuracy of RFS with HW RSS in netmap mode..

cheers,
r2r


On Fri, Sep 27, 2013 at 2:59 AM, hiren panchasara <
hiren.panchasara at gmail.com> wrote:

>
>
>
> On Thu, Sep 26, 2013 at 2:27 PM, chintu hetam <rometoroam at gmail.com>wrote:
>
>> Hiren,
>>
>> https://www.kernel.org/doc/Documentation/networking/scaling.txt must
>> read to understand nuances of each of this features. None of this
>> techniques are used for mostly none other than performance reasons.
>>
>
> Thanks for the link.
> So, RFS (Receive Flow Steering) is equivalent to "flow director" mentioned
> in FreeBSD's ixgbe drivers?
>
>>
>> Michio, personally i am interested to know performance results in netmap
>> mode with RFS patch you just mentioned.
>>
> Takuya/Luigi might have some numbers.
>
> Thanks,
> Hiren
>
> <skip>
>
>