[英]DPDK: Enable jumbo frames on X710 NIC card
I am working with dpdk-stable-18.05.1 on Linux with an Intel X710 NIC.
我正在使用带有 Intel X710 NIC 的 Linux 上的 dpdk-stable-18.05.1 工作。
The above NIC is capable of sending a packet size up to 9000 Bytes.上述 NIC 能够发送最大 9000 字节的数据包。 My application is not able to send a packet size of more than 1500. Here is my code:
我的应用程序无法发送超过 1500 的数据包大小。这是我的代码:
const struct rte_eth_conf default_port_conf = {.rxmode = {.max_rx_pkt_len = 9000, .offloads = DEV_RX_OFFLOAD_JUMBO_FRAME, .jumbo_frame = 1,}
.txmode = {.offloads = DEV_TX_OFFLOAD_MULTI_SEGS, } }
I am trying to send the IPV4 packet size of 8192Bytes but on the RX side, we are getting 2048Bytes.我正在尝试发送 8192Bytes 的 IPV4 数据包大小,但在 RX 端,我们得到 2048Bytes。 (sample pcap is attached).
(附上示例 pcap)。
I also tried with rte_eth_dev_set_mtu(pid, 9000);
我也试过
rte_eth_dev_set_mtu(pid, 9000);
But no luck.但没有运气。
Anything if I am missing please let me know.如果我丢失任何东西,请告诉我。
Intel NIC x710 has no issues in supporting multi-segmented Jumbo frames
. Intel NIC x710 在支持
multi-segmented Jumbo frames
方面没有问题。 This can be easily verified using DPDK 18.11.7 LTS
( always use LTS for better support and fixes ) and DPDK example skeleton
.这可以使用 DPDK
18.11.7 LTS
(始终使用 LTS 以获得更好的支持和修复)和 DPDK 示例skeleton
轻松验证。
To enable multi-segmented JUMBO frames please change the port_conf to要启用多分段 JUMBO 帧,请将 port_conf 更改为
static const struct rte_eth_conf port_conf_default = {
.rxmode = {
.max_rx_pkt_len = 9000,
.split_hdr_size = 0,
.offloads = (DEV_RX_OFFLOAD_JUMBO_FRAME),
},
.txmode = {
.mq_mode = ETH_MQ_TX_NONE,
.offloads = (DEV_TX_OFFLOAD_IPV4_CKSUM |
DEV_TX_OFFLOAD_MULTI_SEGS),
},
};
The only conflicting configuration is using jumbo_frame = 1 along with DEV_RX_OFFLOAD_JUMBO_FRAME
.唯一冲突的配置是使用
jumbo_frame = 1 along with DEV_RX_OFFLOAD_JUMBO_FRAME
。 As per DPDK releases (18.11 LTS) it is recommended to use DEV_RX_OFFLOAD_JUMBO_FRAME as jumbo_frame is deprecated.根据 DPDK 版本 (18.11 LTS),建议使用 DEV_RX_OFFLOAD_JUMBO_FRAME,因为不推荐使用 jumbo_frame。
Hence the assumption of x710 NIC not supporting Multi-segmented Jumbo frames is incorrect .因此,x710 NIC 不支持多分段巨型帧的假设是不正确的。
CMD: CMD:
# ./build/basicfwd -w 0000:08:00.0 -w 0000:08:00.1 -w 0000:08:00.2 -w 0000:08:00.3
EAL: Detected 88 lcore(s)
EAL: Detected 2 NUMA nodes
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'VA'
EAL: Probing VFIO support...
EAL: VFIO support initialized
EAL: PCI device 0000:08:00.0 on NUMA socket 0
EAL: probe driver: 8086:1572 net_i40e
EAL: using IOMMU type 1 (Type 1)
EAL: PCI device 0000:08:00.1 on NUMA socket 0
EAL: probe driver: 8086:1572 net_i40e
EAL: PCI device 0000:08:00.2 on NUMA socket 0
EAL: probe driver: 8086:1572 net_i40e
EAL: PCI device 0000:08:00.3 on NUMA socket 0
EAL: probe driver: 8086:1572 net_i40e
Port 0 MAC: 3c fd fe 9f 3a 00
Port 1 MAC: 3c fd fe 9f 3a 01
Port 2 MAC: 3c fd fe 9f 3a 02
Port 3 MAC: 3c fd fe 9f 3a 03
WARNING: Too many lcores enabled. Only 1 used.
Core 0 forwarding packets. [Ctrl+C to quit]
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