[Oisf-users] af_packet and rss queue count

Peter Manev petermanev at gmail.com
Sat Dec 24 17:51:41 UTC 2016

> On 24 Dec 2016, at 18:22, erik clark <philosnef at gmail.com> wrote:
> I have seen several places commenting that you should set the RSS queue to 1. However, when examining af_packet with Bro, a patch released from Redhat for the ixgbe kernel module, and some ethtool tweaking, we have found that (for Bro at least) running a full 63 (we have 54 cores) RSS queues vastly improves performance, and keeps state intact across sessions.
> Based on this update, which fixes the broken implementation of setting a symmetric hash in the hardware of the card

Can you please share a bit in a bit more detail- 
Which ixgbe/kernel version that is ?
Which patch is it ?
What is the ethtool tweaking procedure?


> (again ixgbe, not tested with i40e), is it still necessary to run one queue? If so, you can't run Bro and Suri on the same box with af_packet and get equivalent performance out of both tools. Having run Suri with 63 queues for a week now, it seems performance is considerably better than with pf_ring, and I can not find any unusual behavior in my alerts...
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