[dpdk-dev] Is it possible to get symmetric hash from RSS for a given flow

Daniel Kan dan at nyansa.com
Fri Feb 28 02:04:46 CET 2014

Thanks, Sangjin. This is exactly i’m looking for. Sorry, I should’ve googled it first. It’s good to know that hash key of repetitive 0x6d5a still yields good load balancing results.


On Feb 27, 2014, at 4:24 PM, Sangjin Han <sangjin at eecs.berkeley.edu> wrote:

> Hi,
> This is exactly what you want:
> http://www.ndsl.kaist.edu/~shinae/papers/TR-symRSS.pdf
> Sangjin
> On Thu, Feb 27, 2014 at 4:22 PM, Daniel Kan <dan at nyansa.com> wrote:
>> Hi,
>> It appears that the hash computed from RSS is unidirectional. Hence, for a 5-tuple flow, packet in one direction can be routed to a queue that may be different than packet in the other direction. I'm wondering if there is a configuration or mechanism to get a symmetric hash so that all packets for a given flow will be in the same queue. Thanks in advance.
>> Dan

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