[dpdk-users] does the 'rte_softrss_be' function match NIC RSS value well? please help me.

Heung Sik Choi hschoi at os.korea.ac.kr
Tue May 30 12:28:56 CEST 2017


I insert ip source, ip destination, port source, port destination to the
tuple but sctp_tag is null. But, I think it is not necessary because the
test_thash.c in DPDK souce files shows example of rte_softrss_be and also
sctp_tage is null.

I don't know byte order. How can I check this? can you tell me the way?

Thanks, Vladimir.

2017-05-30 19:01 GMT+09:00 Vladimir Medvedkin <medvedkinv at gmail.com>:

> What do you have in tuple? What byte order are ip addresses and ports?
>
> 2017-05-30 12:15 GMT+03:00 Heung Sik Choi <hschoi at os.korea.ac.kr>:
>
>> Thanks to reply Vladimir.
>>
>> I does not custom configure ixgbe, thus default compile and load.
>>
>> My calculation softrss code is below:
>>
>> uint8_t rss_key_be[RTE_DIM(default_rss_key)];
>>
>> uint8_t default_rss_key[] = {
>> 0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2,
>> 0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0,
>> 0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4,
>> 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c,
>> 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa
>> };
>>
>> rte_convert_rss_key((uint32_t *)&default_rss_key,(uint32_t *)rss_key_be,
>> RTE_DIM(default_rss_key));
>>
>> rte_softrss_be((uint32_t *)&tuple, RTE_THASH_V4_L4_LEN, rss_key_be);//
>> print it.
>>
>> i used rte convert_rss_key's implementation code which be base in X86.
>>
>> i also change the RTE_THASH_V4_L4_LEN parameter with RTE_THASH_V4_L3_LEN.
>>
>> but doesn't match.
>>
>> Is it wrong to use it that way?
>>
>> please help me.
>>
>>
>>
>> 2017-05-30 17:01 GMT+09:00 Vladimir Medvedkin <medvedkinv at gmail.com>:
>>
>>> Hi,
>>>
>>> How do you configure your NIC and calculate softrss?
>>>
>>>
>>> 2017-05-30 10:47 GMT+03:00 Heung Sik Choi <hschoi at os.korea.ac.kr>:
>>>
>>>> Hi
>>>>
>>>> I want to match NIC RSS value with toeplitz hash function value. And I
>>>> find
>>>> out 'rte_softrss_be' can makes it.
>>>>
>>>> However, when I experiment it, It doesn't match well. (print two value
>>>> on
>>>> terminal through code level)
>>>> I use the environment below:
>>>>
>>>> CPU: xeon 2213 v2 *2 (NUMA)
>>>> NIC: intel 82599ES
>>>> kernel 3.16.4
>>>> ixgbe driver: 3.22
>>>> DPDK 16.11
>>>>
>>>> Please let me know if you have any insights.
>>>>
>>>
>>>
>>>
>>> --
>>> Regards,
>>> Vladimir
>>>
>>
>>
>
>
> --
> Regards,
> Vladimir
>


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