IM8Plus ETH0 slow ping

[ilanganor1]

we are using IMX8PLUS NXP EVB

when connecting eth0 and eth1 to PC we need to get ping <0.5msec

on eth1, great results, we doget 0.3msec

on eth0 the result is , ~0.8 msec

please also see this: link

how can I improve latency? 

maybe setting the eth to disable sleep when not used? (no power limitations in this implementation)

please advice

[Zhiming_Liu]

Hi @ilanganor1 

Reply from SE team:

ENET1 port and ENET_QoS port are different IPs,

when transmitting same length of frames, the rate may be different.

Suggest customer set frame length to MTU(1500bytes) for test.

we ever compared these two ports using test-center, when sending MTU packets(1500bytes),  

ENET1 port and ENET_QoS port can both reach the line-rate.

Best Regards

Zhiming

[ilanganor1]

ok, so maybe I need to check diffrentlly

I want to make sure packet latency <1msec for both eth0 and eth1, can you instruct a recommanded setup for that?