I am still getting the same problem with the optimized function, the result value from rte_softrss_be is different than mbuf.hash->rss. any idea about the problem, can be an old kernel produce this problem?
-----Original Message----- From: Shahaf Shuler [mailto:shah...@mellanox.com] Sent: Mittwoch, 28. Dezember 2016 12:00 To: Saleh, Omran <omran.sa...@sap.com>; users@dpdk.org Subject: RE: Mellanox rss hash information Have you tried you use rte_softrss_be function? I suspect you have an endianness issue here as the mlx5 rss_hash_default_key is already in big-endian format. /** * Optimized implementation. * If you want the calculated hash value matches NIC RSS value * you have to use special converted key with rte_convert_rss_key() fn. * @param input_tuple * Pointer to input tuple * @param input_len * Length of input_tuple in 4-bytes chunks * @param *rss_key * Pointer to RSS hash key. * @return * Calculated hash value. */ static inline uint32_t rte_softrss_be(uint32_t *input_tuple, uint32_t input_len, const uint8_t *rss_key) { ... } --Shahaf -----Original Message----- From: users [mailto:users-boun...@dpdk.org] On Behalf Of Saleh, Omran Sent: Wednesday, December 28, 2016 10:29 AM To: users@dpdk.org Subject: [dpdk-users] Mellanox rss hash information Hi All, Currently, I am using DPDK 16.11 with Mellanox NIC adapters (mlx5). I encounter a problem that the RSS hash value from mbuf (mbug.hash->rss) is not the same as calculated from rte_softrss(). It is completely different. I am using the default hash key from mlx5 uint8_t rss_hash_default_key[] = { 0x2c, 0xc6, 0x81, 0xd1, 0x5b, 0xdb, 0xf4, 0xf7, 0xfc, 0xa2, 0x83, 0x19, 0xdb, 0x1a, 0x3e, 0x94, 0x6b, 0x9e, 0x38, 0xd9, 0x2c, 0x9c, 0x03, 0xd1, 0xad, 0x99, 0x44, 0xa7, 0xd9, 0x56, 0x3d, 0x59, 0x06, 0x3c, 0x25, 0xf3, 0xfc, 0x1f, 0xdc, 0x2a, }; And the following call: auto hash = rte_softrss(&tuple.v4.src_addr, RTE_THASH_V4_L4_LEN, rss_hash_default_key); with RSS configurations as the following: port_conf.rxmode.mq_mode = ETH_MQ_RX_RSS; port_conf.rx_adv_conf.rss_conf.rss_hf = ETH_RSS_NONFRAG_IPV4_TCP; port_conf.rx_adv_conf.rss_conf.rss_key= rss_hash_default_key; port_conf.rx_adv_conf.rss_conf.rss_key_len = 40; This is working perfectly with ixgbe but Mellanox not. Can you help me to figure out what is the problem? What is the default Toeplitz function for mlx5?! My NIC adapters are Mellanox Technologies MT27700 Family [ConnectX-4] With firmware version 12.16.1006 and ofed version 3.3-2.0.0 uname -a : Linux ibmhanar16 3.12.49-11-default #1 SMP Wed Nov 11 20:52:43 UTC 2015 (8d714a0) x86_64 x86_64 x86_64 GNU/Linux Thank you Best regards, Omran Saleh
