[dpdk-users] Same 5 tuple UDP packets have been delivered to different queues.

[Jun Gan]

Hi All,

I just added multiple queues and enabled RSS in our application, I set
"rss_hf" to "ETH_RSS_IP | ETH_RSS_UDP", but I can see that same 5 tuple
packets, will be delivered to different queues. Do I miss something?

Here is the code:

eth_conf.rxmode.mq_mode = ETH_MQ_RX_RSS;
eth_conf.rx_adv_conf.rss_conf.rss_hf = ETH_RSS_IP | ETH_RSS_UDP
eth_conf..rx_adv_conf.rss_conf.rss_hf &= dev_info.flow_type_rss_offloads;


I actually have two queues, and two different threads(lcore) busy
polling(rx_burst) on these two queues, I also met other weird issues like:

dpdk-stable-18.11.2/drivers/net/mlx5/mlx5_rxtx_vec_sse.h:743: rxq_burst_v:
Assertion `rxq->rq_pi == rxq->cq_ci' failed.

I don't understand what does this means, I think rx_burst on the same nic
different queue should be thread-safe, isn't it?

I'm using dpdk 18.11.2, OS is centos 7.6 and NIC is MLX CX-5.

I really appreciate it if anyone can help!!

Thanks,
Jun Gan


-- 
Jun Gan