Hello Team,
Wish to reach out to the gurus of VPP/DPDK to get some quick fix on the
problem we face in VPP based solution , have tried to share on what we do and
where we do we need support , hope this is fine, Thanks for the support
Context of the problem:
Working on VPP based solution with Intel Fortville eth device , and hosted a
sample NF as App in a VM ;System is designed to send eth packets from FVL to
VPP (thru i40e dpdk driver config) with Eth type as "Unknown" with our own
payloads; Here we tried using "RSS with flexible payload" option , passing 16
bytes of data as fields to RSS hash function after the Eth Header for
processing.
What is happening:
And we have configured two queues for each port and packets are NOT
distributed across rx_queues. We have checked this using "show runtime" command
in VPP. When we use the function rte_eth_dev_info_get() function to check RSS
offloads in dev_info struct. It outputs "hash_key_size:52
flow_type_rss_offloads:0x7ef8". This means that RSS_L2_PAYLOAD is also enabled
which is 14th bit in the flow_type_rss_offloads field in dev_info struct.
What we want understand:
Whether RSS is supported with flexible payload option as we see flexible
payload option the datasheet of Fortville eth device?? so, we thought that we
can change the hash input set fields as mentioned in Table 7.5 of data sheet
using flexible payload option with PCTYPE as L2 Protocol type (that is, PCTYPE
== 63)
In section 7.1.4, it says flexible payload is used with FD. So we can confirm
this through this mail VPP mailing alias
Changes in VPP source code:
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);
where I coded in VPP 18.10 source code:
Function name: dpdk_device_setup()
File: plugins/dpdk/device/common.c
Line: at line 148 of 368
Best Regards
Gunaseelan V
98408 60856
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