LS1046 Small packet transmission -- Network packet loss

[Hmc510]

LS1046：

I tried using the iperf3 tool to test TCP packet transmission.

find some retransmission in speed 10Mb/s . packet size is 60 byte.(net link is 100Mbps)

Hmc510_0-1683529418171.png

and the ethtool notify no drop\error packets find:

Hmc510_1-1683529489188.png

I am trying to count the number of network connections between PCs and board 1046:(use cmd netstat -i)

iperf3 notify the "Retr=13"

PC: Tx = 15506

1046: Rx= 15493 . (obvious lost "13" )

and my net chip is YT8614 use Serdes 0x3040 channel B(QSGMII x4).It provides network frame counting,and I read the regs the Rx packet is 15506.

So the packet received by the network chip(YT8614) is correct. and ethtool notify Rx=15493(lost 13) ,and (drop+error = 0).

Has the data packet been lost elsewhere? Serdes\Bman\Kernel? Do they have packet counting function for debug.

Thanks

[yipingwang]

Please refer to the following document

https://community.nxp.com/t5/Layerscape-Knowledge-Base/Debugging-Packet-LOSS-and-QMAN-Enqueue-Reject...

[Hmc510]

Thank you for your reply

1. I have used this document and still have no leads.

2. What do these numerical values represent

Hmc510_0-1683627332543.png

[yipingwang]

Could you please share the LSDK version and kernel version info?

[Hmc510]

pakcet is LSDK 2108

linux 5.10

Hmc510_0-1683886813392.png

Hmc510_1-1683886842565.png

[yipingwang · Accepted solution]

Please refer to section "1.3 Linux Sysfs Support for Fman Rx Port Statistics" in https://community.nxp.com/t5/Layerscape-Knowledge-Base/Debugging-Packet-LOSS-and-QMAN-Enqueue-Reject...

Please refer to the update in this thread.

https://community.nxp.com/t5/Layerscape/LS1046-Is-there-a-frame-statistics-tool-for-MACs/m-p/1647774...