ConnectX-7 400GbE wire-rate?

[Thomas Monjalon]

Hello,

I see there is no answer.

Did you try with testpmd?
I don't know whether it can be a limitation of dpdk-pktgen?



29/05/2024 03:32, Yasuhiro Ohara:
> Hi. My colleague is trying to generate 400Gbps traffic using ConnectX-7,
> but with no luck.
> 
> Has anyone succeeded in generating 400Gbps (by larger than 1500B is ok),
> or are there any known issues?
> 
> Using dpdk-pktgen, the link is successfully recognized as 400GbE
> but when we start the traffic, it seems to be capped at 100Gbps.
> 
> Some info follows.
> 
> [    1.490256] mlx5_core 0000:01:00.0: firmware version: 28.41.1000
> [    1.492853] mlx5_core 0000:01:00.0: 504.112 Gb/s available PCIe
> bandwidth (32.0 GT/s PCIe x16 link)
> [    1.805419] mlx5_core 0000:01:00.0: Rate limit: 127 rates are
> supported, range: 0Mbps to 195312Mbps
> [    1.808477] mlx5_core 0000:01:00.0: E-Switch: Total vports 18, per
> vport: max uc(128) max mc(2048)
> [    1.827270] mlx5_core 0000:01:00.0: Port module event: module 0,
> Cable unplugged
> [    1.830317] mlx5_core 0000:01:00.0: mlx5_pcie_event:298:(pid 9):
> PCIe slot advertised sufficient power (75W).
> [    1.830610] mlx5_core 0000:01:00.0: MLX5E: StrdRq(1) RqSz(8)
> StrdSz(2048) RxCqeCmprss(0)
> [    1.929813] mlx5_core 0000:01:00.0: Supported tc offload range -
> chains: 4294967294, prios: 4294967295
> 
> Device type:    ConnectX7
> Name:           MCX75310AAS-NEA_Ax
> Description:    NVIDIA ConnectX-7 HHHL Adapter card; 400GbE / NDR IB
> (default mode); Single-port OSFP; PCIe 5.0 x16; Crypto Disabled;
> Secure Boot Enabled;
> Device:         /dev/mst/mt4129_pciconf0
> 
> Enabled Link Speed (Ext.)       : 0x00010000 (400G_4X)
> Supported Cable Speed (Ext.)    : 0x00010800 (400G_4X,100G_1X)
> 
> pktgen result:
> 
> Pkts/s Rx         :              0
>            TX         :  8059264
> 
> MBits/s Rx/Tx  :   0/97742
> 
> 
> Any info is appreciated. Thanks.
> 
> regards,
> Yasu
>