[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 11:15:05 CEST 2017

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_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

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