Performance issues of data transmission speed in PCIe EP mode

[Yeahhhh]

Hi，I found another post that had a somewhat similar situation to what I described, although he was using an ethernet interface：

Enabling Orin Dev Kit Ethernet over PCIe

Hi, Following Bringing up an Ethernet Interface over PCIe and using tvnet in order to check bulk transfer between Orin EP and PC RP, am getting very low speeds relative to theoretical for PCIe 4.0 x8 which is ~16GB/s or ~128Gb/s. Uplink and downlink depending on which side initiates transfer with iperf3 are only 259-481Mb/s. iperf3 -c 192.168.2.1 [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.04 sec 310 MBytes 259 Mbits/sec 0 sender [ 5] 0.…