On Thu, Mar 22, 2018 at 12:52:30PM +0000, Hanoch Haim (hhaim) wrote: > Hi, > I think this is not the vector driver because I'm user scatter/gather >
Vector driver has supported multi-buffer packets for a while now, so it should be used for packet RX in i40e in just about all cases. If possible, could you check if adjusting the setting for 16B/32B descriptors in the build-time config makes a difference. For 16B descriptors the flow director ID and RSS hash share a field in the descriptor, while they don't with 32B versions (though the vector driver only ever reads the first 16B of each descriptor in any case). /Bruce > Thanks, > Hanoh > > > -----Original Message----- > From: Ferruh Yigit [mailto:ferruh.yi...@intel.com] > Sent: Thursday, March 22, 2018 2:18 PM > To: Hanoch Haim (hhaim); Bruce Richardson > Cc: dev@dpdk.org > Subject: Re: [dpdk-dev] i40e mbuf->rss indication > > 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.richard...@intel.com] > > Sent: Thursday, March 22, 2018 1:35 PM > > To: Hanoch Haim (hhaim) > > Cc: dev@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 > >> >
