Part Number: AM2434
Other Parts Discussed in Thread: LP-AM243, DP83TG720-EVM-AM2, LP-AM261
Dear experts,
I am currently evaluating gPTP performance of a setup involving LP-AM243 boards.
I encountered an issue while testing how background traffic affects time synchronization performance.
The setup is: PC (iperf client) <> LP-AM243 (gPTP timeTransmitter) <> LP-AM243 (gPTP timeReceiver) <> PC (iperf server)
I am running with 100Mbits/s CPSW Ethernet and only a relatively small background traffic introduced with iperf degrades the gPTP performance.
Here is attached logs from both AM243 boards, where you can see the error messages. Iperf traffic is started around time 60s sending TCP packets on 3Mbits/s rate in both directions for 10 seconds.
This test was done without auto negotiation, but I encountered the same issue with auto negotiation as well.
I did not have the issue when running with 1Gbits/s CPSW Ethernet. Highest traffic I could achieve with iperf in that case was around 170Mbits/s, and that did not seem to affect the gPTP performance.
Please let me know if you have any insights or suggestions on what might be causing this behavior. Would it be possible to have an online session for figuring out this issue unless there is an easy fix for it?
Looking forward to hearing from you!