[dpdk-dev] i40e mbuf->rss indication
Ferruh Yigit
ferruh.yigit at intel.com
Thu Mar 22 13:18:16 CET 2018
On 3/22/2018 11:46 AM, Hanoch Haim (hhaim) wrote:
> Driver: i40e
>
> DPDK : 17.11
>
> Configuration :
>
> 1) RSS configuration
> rxmode.mq_mode = ETH_MQ_RX_RSS;
> rss->rss_hf = ETH_RSS_UDP | ETH_RSS_TCP;
> rss->rss_key = Microsoft key
> rss->rss_key_len = 52
>
> *configure RETA to some rx-queues
>
> 2) Change hash to TOEPLITZ (only for i40e)
>
> struct rte_eth_hash_filter_info info = {};
> info.info_type = RTE_ETH_HASH_FILTER_GLOBAL_CONFIG;
> info.info.global_conf.hash_func = RTE_ETH_HASH_FUNCTION_TOEPLITZ;
> rte_eth_dev_filter_ctrl(m_repid,
> RTE_ETH_FILTER_HASH,
> RTE_ETH_FILTER_SET, &info);
>
> 3) Configure some flow-director rules
>
> 4) TCP/UDP packets are received to the *right* core (based on a SW Toeplitz calculation +reta table) however
> The reported rss value is *wrong* in the mbuf
> (m->hash.rss == *wrong value*)
Are you getting same result with both scalar and vector driver?
> ((m->ol_flags&PKT_RX_RSS_HASH) == PKT_RX_RSS_HASH
>
> 5) The above works fine for mlx5 and ixgbe
>
> 6) I suspect the hash is something else, maybe flow-director id or xor hash ..
>
> Wanted to know if this is a known issue. I can provide a simple way to reproduce it using TRex
>
> Thanks,
> Hanoh
>
>
> -----Original Message-----
> From: Bruce Richardson [mailto:bruce.richardson at intel.com]
> Sent: Thursday, March 22, 2018 1:35 PM
> To: Hanoch Haim (hhaim)
> Cc: dev at dpdk.org
> Subject: Re: [dpdk-dev] i40e mbuf->rss indication
>
> On Wed, Mar 21, 2018 at 06:47:22PM +0000, Hanoch Haim (hhaim) wrote:
>> Hi All,
>> DPDK:17.11
>> When i40e is configured with RSS enabled and hash.type=toeplitz
>>
>> m->hash.rss = some weird number
>> ((m->ol_flags&PKT_RX_RSS_HASH) == PKT_RX_RSS_HASH
>>
>> The hash value is correct and match the MS Toeplitz standard.
>>
>> Is this expected?
>
> I'm sorry, but I don't quite follow the question, or the problem. Are you meaning to say that the hash value is incorrect, or that the flag is not being set or something else?
>
> /Bruce
>
>>
>> The above works fine with ixgbe/mlx5
>>
>> Thanks,
>> Hanoh
>>
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