Re: Load-balancing position field in DPDK load_balancer sample app vs. Hash table

[Yerden Zhumabekov <e_zhumabekov-8EHiFRVJVgQ@public.gmane.org>]

Thank you. And one more thing, does Fortville (or Niantic) support
various L2 headers when calculating RSS hash? I mean MPLS, QinQ, etc.?

14.11.2014 22:57, Chilikin, Andrey пишет:
> Fortville supports symmetrical hashing on HW level, a patch for i40e PMD was submitted a couple of weeks ago. For Niantic you can use symmetrical  rss key recommended by Konstantin.
>
> Regards,
> Andrey
>
> -----Original Message-----
> From: dev [mailto:dev-bounces-VfR2kkLFssw@public.gmane.org] On Behalf Of Ananyev, Konstantin
> Sent: Friday, November 14, 2014 4:50 PM
> To: Yerden Zhumabekov; Kamraan Nasim; dev-VfR2kkLFssw@public.gmane.org
> Cc: Yuanzhang Hu
> Subject: Re: [dpdk-dev] Load-balancing position field in DPDK load_balancer sample app vs. Hash table
>
>> -----Original Message-----
>> From: Yerden Zhumabekov [mailto:e_zhumabekov-8EHiFRVJVgQ@public.gmane.org]
>> Sent: Friday, November 14, 2014 4:23 PM
>> To: Ananyev, Konstantin; Kamraan Nasim; dev-VfR2kkLFssw@public.gmane.org
>> Cc: Yuanzhang Hu
>> Subject: Re: [dpdk-dev] Load-balancing position field in DPDK 
>> load_balancer sample app vs. Hash table
>>
>> I'd like to interject a question here.
>>
>> In case of flow classification, one might possibly prefer for packets 
>> from the same flow to fall on the same logical core. With this '%' 
>> load balancing, it would require to get the same RSS hash value for 
>> packets with direct (src to dst) and swapped (dst to src) IPs and 
>> ports. Am I correct that hardware RSS calculation cannot provide this symmetry?
> As I remember, it is possible but you have to tweak rss key values.
> Here is a paper describing how to do that:
> http://www.ndsl.kaist.edu/~shinae/papers/TR-symRSS.pdf
>
> Konstantin
>

-- 
Sincerely,

Yerden Zhumabekov
State Technical Service
Astana, KZ