[dpdk-dev] RSS handling using L2_Payload type - Flexible Payload

[Anandaraman Viswanathan <anandaramanv@hcl.com>]

Hi Team,
This is regarding RSS feature. In RSS configuration with Flexible Payload, facing a problem in getting packets distributed across multiple queues (2 per port). While debugging, found packets going thru q1 even if million packets are sent.
For simulating multiple flows, modifying Inner Payload which has one more Ethernet header, Src and Dest MAC of that header are getting changed incrementally for each packet.


To further validate if FVL support RSS L2_PAYLOAD , we used the function rte_eth_dev_info_get() to check RSS offloads in dev_info struct,  It outputs "hash_key_size:52 flow_type_rss_offloads:0x7ef8", which means RSS supports L2_PAYLOAD.


The details of configuration and code snippets given below

struct rte_eth_hash_filter_info filter_info;



    memset(&filter_info, 0, sizeof(filter_info));



    filter_info.info_type = RTE_ETH_HASH_FILTER_INPUT_SET_SELECT;

    filter_info.info.input_set_conf.flow_type = RTE_ETH_FLOW_L2_PAYLOAD;

    filter_info.info.input_set_conf.inset_size = 8;



    filter_info.info.input_set_conf.field[0] = RTE_ETH_INPUT_SET_FLEX_PAYLOAD_1ST_WORD;

    filter_info.info.input_set_conf.field[1] = RTE_ETH_INPUT_SET_FLEX_PAYLOAD_2ND_WORD;

    filter_info.info.input_set_conf.field[2] = RTE_ETH_INPUT_SET_FLEX_PAYLOAD_3RD_WORD;

    filter_info.info.input_set_conf.field[3] = RTE_ETH_INPUT_SET_FLEX_PAYLOAD_4TH_WORD;

    filter_info.info.input_set_conf.field[4] = RTE_ETH_INPUT_SET_FLEX_PAYLOAD_5TH_WORD;

    filter_info.info.input_set_conf.field[5] = RTE_ETH_INPUT_SET_FLEX_PAYLOAD_6TH_WORD;

    filter_info.info.input_set_conf.field[6] = RTE_ETH_INPUT_SET_FLEX_PAYLOAD_7TH_WORD;

    filter_info.info.input_set_conf.field[7] = RTE_ETH_INPUT_SET_FLEX_PAYLOAD_8TH_WORD;



    filter_info.info.input_set_conf.op = RTE_ETH_INPUT_SET_ADD;



    filter_ret = rte_eth_dev_filter_ctrl(xd->port_id, RTE_ETH_FILTER_HASH, RTE_ETH_FILTER_SET, &filter_info);



MACRO  "RTE_ETH_FLOW_L2_PAYLOAD " has been used to set RSS flow type, wish to check if this approach is good OR Any prerequisites in config to be done OR Any further changes needed in the code.



Hello Helin

Copying you as we see from DPDK forum (http://mails.dpdk.org/archives/dev/2015-November/027203.html<https://apac01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmails.dpdk.org%2Farchives%2Fdev%2F2015-November%2F027203.html&data=02%7C01%7Canandaramanv%40hcl.com%7Cc025657b0204440f34c208d6916ece50%7C189de737c93a4f5a8b686f4ca9941912%7C0%7C0%7C636856302422857253&sdata=gKc0dDAnCkGR8F3wL6P5kUCRfIOBXGoskIU3j9RAQi4%3D&reserved=0> ), you are the author of above feature in DPDK , hence wish to request for clarifying our understanding on RSS as mentioned above is correct.


Cheers
Anand

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